JP2018046345A - Broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcasting receiver capable of executing a function of a higher added value.SOLUTION: A broadcast receiver operable to receive a content comprises: a receiving unit for receiving the content; a video conversion unit for converting a resolution of an image and/or a transmission property of the content, which the receiving unit receives; an interface for outputting the content subjected to the conversion by the video conversion unit; and a control unit for controlling an output state of the content from the interface. The control unit determines the output state of the content from the interface according to a combination of a piece of control information showing a copy control state of the content, a piece of control information specifying whether or not the content should be protected at the time of output, a resolution of an image of the content at the time of output from the interface, and a transmission property of an image of the content at the time of output from the interface, which the receiving unit receives together with the content.SELECTED DRAWING: Figure 7A

Description

  The present invention relates to a broadcast receiving apparatus.

  One of the extended functions of the digital broadcasting service is data broadcasting that transmits digital data using broadcast waves and displays various information such as weather forecasts, news, and recommended programs. Many television receivers capable of receiving data broadcasts are already on the market, and many techniques related to data broadcast reception have been disclosed, including Patent Document 1 below.

JP 2001-186486 A

  In response to recent environmental changes related to content distribution, television receivers are also required to expand various functions. In particular, there are many requests for distribution of content and cooperative applications using a broadband network environment such as the Internet, and requests for high resolution / high definition of video content. However, it is difficult to provide a high-value-added television receiver that can meet the above requirements only by diverting only the data broadcast reception function or the like provided in the current television receiver, or only by expanding the function of the data broadcast reception function or the like. .

  An object of the present invention is to provide a broadcast receiving apparatus capable of executing a function with higher added value.

  As a means for solving the above problems, the technology described in the claims is used.

  As an example, a broadcast receiving device that receives content, a receiving unit that receives the content, a video conversion unit that converts the resolution and / or transfer characteristics of the video of the content received by the receiving unit, An interface for outputting the content converted by the video conversion unit, and a control unit for controlling the output state of the content from the interface, the control unit receiving the content together with the content, Control information indicating the copy control status of content, control information for designating whether or not protection is required when outputting the content, resolution of the video of the content when output from the interface, and when outputting from the interface Depending on the combination of the video transmission characteristics of the content, the Determines the output state of the content, and the control unit specifies whether or not protection is required when outputting the content when the control information indicating the copy control state of the content indicates that there is a copy restriction If the control information indicates protection at the time of output, control is performed to perform output protection when the content is output from the interface, but the content when the output protection level is output from the interface is performed. A broadcast receiving device is used that changes according to the combination of the video resolution of the video and the transfer characteristics of the video of the content when output from the interface.

  By using the technique of the present invention, it is possible to provide a broadcast receiving apparatus that can execute a function with higher added value.

1 is a system configuration diagram illustrating an example of a broadcast communication system including a broadcast receiving apparatus according to Embodiment 1. FIG. It is explanatory drawing of the outline | summary of the encoding signal in MMT. It is a block diagram of MPU in MMT. It is a block diagram of the MMTP packet in MMT. It is a conceptual diagram of the protocol stack of the broadcasting system using MMT. It is a hierarchical block diagram of the control information used with a broadcast system. It is a list of the tables used by TLV-SI of a broadcasting system. It is a list of descriptors used in the TLV-SI of the broadcasting system. It is a list of messages used in the MMT-SI of the broadcasting system. It is a list of the tables used by MMT-SI of a broadcasting system. It is a list (the 1) of the descriptor used by MMT-SI of a broadcasting system. It is the list (the 2) of the descriptor used by MMT-SI of a broadcasting system. It is a figure which shows the data transmission of a broadcasting system, and the relationship of each table. 1 is a block diagram of a broadcast receiving apparatus according to Embodiment 1. FIG. It is a block diagram of the logical plane structure of the presentation function of the broadcast receiver which concerns on Example 1. FIG. 1 is a system configuration diagram of clock synchronization / presentation synchronization of a broadcast receiving apparatus according to Embodiment 1. FIG. 1 is a software configuration diagram of a broadcast receiving apparatus according to Embodiment 1. FIG. 1 is a block diagram of a broadcast station server according to Embodiment 1. FIG. 1 is a block diagram of a service provider server according to Embodiment 1. FIG. 1 is a block diagram of a portable information terminal according to Embodiment 1. FIG. 1 is a software configuration diagram of a portable information terminal according to Embodiment 1. FIG. It is a figure which shows the data structure of MH-TOT of a broadcast system. It is a figure which shows the format of the JST_time parameter of a broadcast system. It is a figure which shows the calculation method of the present date from MJD of the broadcast receiver which concerns on Example 1. FIG. It is a figure which shows the structure of the NTP format of a broadcast system. It is a figure which shows the data structure of the MPU time stamp descriptor of a broadcast system. It is a figure which shows the data structure of the time information of the TMCC extension information area | region of a broadcast system. It is an operation | movement sequence diagram at the time of the channel scan of the broadcast receiver which concerns on Example 1. FIG. It is a figure which shows the data structure of TLV-NIT of a broadcast system. It is a figure which shows the data structure of the satellite distribution system descriptor of a broadcast system. It is a figure which shows the data structure of the service list descriptor of a broadcast system. It is a figure which shows the data structure of AMT of a broadcast system. FIG. 3 is an operation sequence diagram at the time of channel selection of the broadcast receiving apparatus according to the first embodiment. It is a figure which shows the data structure of MPT of a broadcast system. It is a figure which shows the data structure of LCT of a broadcast system. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure explaining the operation | movement of the exception process of the screen layout control based on LCT. It is a figure explaining the operation | movement of the exception process of the screen layout control based on LCT. It is a figure which shows the data structure of MH-EIT of a broadcast system. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure at the time of the emergency alert broadcast display of the broadcast receiver which concerns on Example 1. FIG. 6 is a block diagram of a broadcast receiving apparatus according to Embodiment 2. FIG. It is a figure explaining inconsistency of the present time display at the time of broadcast service switching. It is a figure explaining operation | movement of selection control of the present time information reference source which concerns on Example 2. FIG. FIG. 9 is an operation sequence diagram of current time information update processing according to the second embodiment. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. FIG. 10 is a system configuration diagram of a broadcast communication system according to a third embodiment. It is a figure which shows the data structure of the content information descriptor of a broadcast system. It is a figure explaining the meaning of the content type in the content information descriptor of a broadcast system. It is a figure explaining the meaning of the source device primary color chromaticity coordinate and the source device white chromaticity coordinate in the content information descriptor of the broadcasting system. It is a figure explaining the meaning of EOTF identification in the content information descriptor of a broadcast system. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 3. FIG. It is a figure explaining the shift | offset | difference of the color gamut of a source device and a monitor apparatus. It is a figure explaining the color gamut conversion process of the broadcast receiver which concerns on Example 3. FIG. It is a figure explaining the color gamut conversion process of the broadcast receiver which concerns on Example 3. FIG. It is a figure explaining the image quality adjustment item of the broadcast receiver which concerns on Example 3. FIG. It is a figure explaining the conversion process of the luminance level of the broadcast receiver which concerns on Example 3. FIG. It is a figure explaining the conversion process of the luminance level of the broadcast receiver which concerns on Example 3. FIG. FIG. 10 is a system configuration diagram of a broadcast communication system according to a fourth embodiment. FIG. 10 is a block diagram of a broadcast receiving apparatus according to a fourth embodiment. FIG. 10 is a software configuration diagram of a broadcast receiving apparatus according to a fourth embodiment. FIG. 10 is an interface configuration diagram of a broadcast receiving apparatus and a monitor apparatus according to a fourth embodiment. It is a figure explaining the mastering information which the broadcast receiver which concerns on Example 4 outputs. FIG. 10 is a system configuration diagram of a broadcast communication system according to a fifth embodiment. FIG. 10 is a diagram illustrating an example of output control information according to a fifth embodiment. FIG. 10 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 10 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 10 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 10 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 10 is a diagram illustrating an example of content output protection determination processing according to the fifth embodiment. FIG. 10 is a diagram illustrating an example of content output protection determination processing according to the fifth embodiment. FIG. 10 is a diagram illustrating an example of content output protection determination processing according to the fifth embodiment.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
Example 1

[System configuration]
FIG. 1 is a system configuration diagram illustrating an example of a broadcast communication system including a broadcast receiving apparatus according to the present embodiment. The broadcast communication system of this embodiment includes a broadcast receiver 100 and an antenna 100a, a broadband network such as the Internet 200, a router 200r and an access point 200a, a radio tower 300t and a broadcast satellite (or communication satellite) 300s, a broadcast station A server 300, a service provider server 400, other application servers 500, a mobile telephone communication server 600, a base station 600b of a mobile telephone communication network, and a portable information terminal 700.

  The broadcast receiving apparatus 100 receives the broadcast wave transmitted from the radio tower 300t via the broadcast satellite (or communication satellite) 300s and the antenna 100a. Alternatively, the broadcast wave transmitted from the radio tower 300t may be received directly from the antenna 100a without passing through the broadcast satellite (or communication satellite) 300s. The broadcast receiving apparatus 100 can be connected to the Internet 200 via the router apparatus 200r, and can transmit and receive data by communication with each server apparatus and other communication devices on the Internet 200.

  The router device 200r is connected to the Internet 200 by wired communication, is connected to the broadcast receiving device 100 by wired communication or wireless communication, and is connected to the portable information terminal 700 by wireless communication. For the wireless communication, a method such as Wi-Fi (registered trademark) may be used. As a result, each server device and other communication devices on the Internet 200, the broadcast receiving device 100, and the portable information terminal 700 can mutually transmit and receive data via the router device 200r. Communication between the broadcast receiving device 100 and the portable information terminal 700 may be performed directly by a method such as BlueTooth (registered trademark) or NFC (Near Field Communication) without using the router device 200r.

  The radio tower 300t is a broadcasting facility of a broadcasting station, and transmits broadcast waves including encoded data of broadcast programs, caption information, other applications, general-purpose data, and the like. The broadcast satellite (or communication satellite) 300s receives the broadcast wave transmitted from the radio tower 300t of the broadcast station, performs appropriate frequency conversion, etc., and then broadcasts the antenna 100a connected to the broadcast receiving device 100 to the antenna 100a. It is a repeater that retransmits waves. The broadcasting station includes a broadcasting station server 300. The broadcast station server 300 stores metadata such as broadcast programs (video content, etc.) and program titles, program IDs, program outlines, performer information, broadcast date and time of each broadcast program, and the video content and each metadata are stored. Based on the contract, it can be provided to the service provider. The provision of the moving image content and each metadata to the service provider may be performed through an API (Application Programming Interface) provided in the broadcasting station server 300.

  The service provider server 400 is a server device prepared by a service provider, and can provide various services linked to a broadcast program distributed from a broadcasting station. The service provider server 400 also stores, manages, and distributes video content and metadata provided from the broadcast station server 300, various contents and applications linked to broadcast programs, and the like. In addition, in response to an inquiry from a television receiver or the like, it also has a function of searching for available contents and applications and providing a list. The storage, management and distribution of the content and metadata and the storage, management and distribution of the application may be performed by different server devices. The broadcasting station and the service provider may be the same or different. A plurality of service provider servers 400 may be prepared for different services. Moreover, the function of the service provider server 400 may be provided by the broadcast station server 300.

  The other application server 500 is a known server device that stores, manages, and distributes other general applications, operation programs, contents, data, and the like. There may be a plurality of other application servers 500 on the Internet 200.

  The mobile telephone communication server 600 is connected to the Internet 200, and is connected to the portable information terminal 700 via the base station 600b. The mobile telephone communication server 600 manages telephone communication (call) and data transmission / reception via the mobile telephone communication network of the portable information terminal 700, and each server device and other communication devices on the portable information terminal 700 and the Internet 200. Data can be sent and received through communication with the. Communication between the base station 600b and the portable information terminal 700 is performed using a W-CDMA (Wideband Code Multiple Access) (registered trademark) method, a GSM (Global System for Mobile communications) (registered trademark) method, or an LTE (Long Term Term) method. Alternatively, it may be performed by other communication methods.

  The portable information terminal 700 has telephone communication (call) and data transmission / reception functions via a mobile telephone communication network, and wireless communication functions such as Wi-Fi (registered trademark). The portable information terminal 700 can be connected to the Internet 200 via the router device 200r and the access point 200a, or via the mobile phone communication network base station 600b and the mobile phone communication server 600. It is possible to send and receive data by communication with each server device and other communication devices. The access point 200a is connected to the Internet 200 by wired communication, and is connected to the portable information terminal 700 by wireless communication. For the wireless communication, a method such as Wi-Fi (registered trademark) may be used. Communication between portable information terminal 700 and broadcast receiving apparatus 100 is performed via access point 200a and Internet 200 and router apparatus 200r, or through base station 600b and mobile telephone communication server 600, Internet 200 and router apparatus 200r. It may be carried out via.

[Outline of MMT method]
The broadcast receiving apparatus 100 shown in FIG. 1 is defined by an MPEG (Moving Picture Experts Group) -2 system that is widely used in conventional digital broadcasting systems as a media transport system for transmitting data such as video and audio. It is assumed that the television receiver is compatible with MMT (MPEG Media Transport) instead of TS (Transport Stream) (hereinafter referred to as MPEG2-TS). A television receiver that can handle both MPEG2-TS and MMT may be used.

  MPEG2-TS is characterized in that components such as video and audio constituting a program are multiplexed into one stream together with a control signal and a clock. Since it is handled as one stream including a clock, it is suitable for transmitting one content through one transmission path in which transmission quality is ensured, and has been adopted in many conventional digital broadcasting systems. On the other hand, the function of MPEG2-TS in response to environmental changes related to content distribution, such as recent diversification of content, diversification of devices using content, diversification of transmission paths for content distribution, diversification of content storage environment, etc. Therefore, MMT is a newly developed media transport system.

  FIG. 2A shows an example of an outline of the encoded signal in the MMT of the present embodiment. As shown in the figure, the MMT of the present embodiment has an MFU (Media Fragment Unit), an MPU (Media Processing Unit), an MMTP (MMT Protocol) payload, and an MMTP packet as elements constituting an encoded signal. And The MFU is a format at the time of transmission of video, audio, and the like, and may be configured in units of NAL (Network Abstraction Layer) units or access units. The MPU may be composed of MPU metadata including information on the configuration of the entire MPU, movie fragment metadata including information of encoded media data, and sample data that is encoded media data. Further, it is assumed that MFU can be extracted from the sample data. In the case of media such as video components and audio components, the presentation time and decoding time may be specified in units of MPUs or access units. FIG. 2B shows an example of the configuration of the MPU.

  The MMTP packet includes a header part and an MMTP payload, and transmits MFU and MMT control information. The MMTP payload includes a payload header corresponding to the content (data unit) stored in the payload portion. FIG. 2C shows an example of the outline from the construction of the MFU from the video / audio signal, further storing it in the MMTP payload, and configuring the MMTP packet. Note that, in a video signal that is encoded using inter-frame prediction, it is desirable to configure the MPU in GOP (Group Of Pictures) units. Further, when the size of the MFU to be transmitted is small, one MFU may be stored in one payload part, or a plurality of MFUs may be stored in one payload part. When the size of the MFU to be transmitted is large, one MFU may be divided into a plurality of payload parts and stored. Further, the MMTP packet may be protected using a technique such as Application Layer Forward Error Correction (AL-FEC) or Automatic Repeat Request (ARQ) in order to recover a packet loss on the transmission path.

  In the broadcasting system of the present embodiment, MPEG-H HEVC (High Efficiency Video Coding) is used as the video encoding system, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless) is used as the audio encoding system. Coding) is used. Encoded data such as video and audio of a broadcast program encoded by each of the above methods is in the MFU or MPU format, is further carried on the MMTP payload, is converted into an MMTP packet, and is transmitted as an IP (Internet Protocol) packet. And Further, data contents related to a broadcast program may be in the MFU or MPU format, further MMTP packetized on the MMTP payload, and transmitted by IP packet. Data content transmission methods include subtitle / text super transmission method used for streaming data synchronized with broadcast, application transmission method used for data transmission asynchronous with broadcast, and synchronous / asynchronous message for application running on television receiver. Four types of event message transmission methods used for notification and other general-purpose data transmission methods for transmitting general-purpose data in a synchronous / asynchronous manner are prepared.

  For transmission of MMTP packets, UDP / IP (User Datagram Protocol / Internet Protocol) is used in the broadcast transmission path, and UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used in the communication line. . In the broadcast transmission path, a TLV (Type Length Value) multiplexing method is used for efficient transmission of IP packets. An example of the protocol stack of the broadcasting system of the present embodiment is shown in FIG. In the figure, (A) is an example of a protocol stack in a broadcast transmission path, and (B) is an example of a protocol stack in a communication line.

  In the broadcasting system of the present embodiment, a mechanism for transmitting two types of control information, MMT-SI (MMT-Signaling Information) and TLV-SI (TLV-Signaling Information), is prepared. MMT-SI is control information indicating the configuration of a broadcast program. It is assumed that the format of the MMT control message is MMTP packet on the MMTP payload, and is transmitted as an IP packet. TLV-SI is control information related to multiplexing of IP packets, and provides information for channel selection and correspondence information between IP addresses and services.

  Also in a broadcasting system using MMT, time information is transmitted in order to provide absolute time. Note that MPEG2-TS indicates the component display time based on a different clock for each TS, whereas MMT indicates the component display time based on the Coordinated Universal Time (UTC). To do. With these mechanisms, it is possible for the terminal device to synchronously display components transmitted from different transmission points through different transmission paths. In order to provide UTC, it is assumed that an IP packet in NTP (Network Time Protocol) format is used.

[Control information of broadcasting system using MMT]
In the broadcast system supported by the broadcast receiving apparatus 100 according to the present embodiment, as described above, the control information includes the TLV-SI related to the TLV multiplexing method for multiplexing IP packets and the MMT that is the media transport method. Prepare the relevant MMT-SI. TLV-SI provides information for the broadcast receiving apparatus 100 to demultiplex IP packets multiplexed on the broadcast transmission path. The TLV-SI is composed of a “table” and a “descriptor”. The “table” is transmitted in the section format, and the “descriptor” is arranged in the “table”. The MMT-SI is transmission control information indicating information related to the configuration of the MMT package and the broadcast service. MMT-SI is composed of three levels: “message” for storing “table” and “descriptor”, “table” having elements and attributes indicating specific information, and “descriptor” indicating more detailed information. Shall be. An example of the hierarchical structure of the control information used in the broadcasting system of the present embodiment is shown in FIG.

<Table used in TLV-SI>
FIG. 5A shows a list of “tables” used in the TLV-SI of the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In the present embodiment, the following table is used as a “table” of TLV-SI.

(1) TLV-NIT
The network information table for TLV (Network Information Table for TLV: TLV-NIT) represents information on the physical configuration of the TLV stream transmitted by the network and the characteristics of the network itself.

(2) AMT
The address map table (Address Map Table: AMT) provides a list of multicast groups of IP packets constituting each service transmitted in the network.

(3) Table set by the operator It is also possible to prepare a table uniquely set by the service operator.

<Descriptor used in TLV-SI>
FIG. 5B shows a list of “descriptors” arranged in the TLV-SI of the broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment corresponds. In this embodiment, the following are used as “descriptors” of TLV-SI.

(1) Service list descriptor The service list descriptor provides a list of services according to service identification and service type.

(2) Satellite distribution system descriptor The satellite distribution system descriptor indicates the physical conditions of the satellite transmission path.

(3) System management descriptor The system management descriptor is used to identify broadcast and non-broadcast.

(4) Network name descriptor The network name descriptor describes the network name using character codes.

(5) Descriptors set by the provider In addition, it is possible to prepare descriptors uniquely set by the service provider.

<Messages used in MMT-SI>
FIG. 6A shows a list of “messages” used in the MMT-SI of the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In this embodiment, it is assumed that the following message is used as a “message” of MMT-SI.

(1) PA message The Package Access (PA) message is used to transmit various tables.

(2) M2 section message The M2 section message is used to transmit the section extension format of MPEG-2 Systems.

(3) CA message The CA message is used to transmit a table for identifying the conditional access system.

(4) M2 short section message The M2 short section message is used to transmit the section short format of MPEG-2 Systems.

(5) Data transmission message The data transmission message is a message for storing a table relating to data transmission.

(6) Message set by the operator In addition, it is possible to prepare a message uniquely set by the service operator.

<Table used in MMT-SI>
FIG. 6B shows a list of “tables” used in the MMT-SI of the broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment. The table is control information having elements and attributes indicating specific information, and is stored in a message and transmitted by an MMTP packet. The message for storing the table may be determined according to the table. In this embodiment, the following table is used as the “table” of MMT-SI.

(1) MPT
The MMT package table (MPT) provides information constituting the package such as a list of assets and a position of the assets on the network. The MPT may be stored in the PA message.

(2) PLT
A package list table (Packet List Table: PLT) shows a list of IP data flows and packet IDs that transmit PA messages of MMT packages provided as broadcasting services, and IP data flows that transmit IP services. The PLT may be stored in the PA message.

(3) LCT
A layout setting table (Layout Configuration Table: LCT) is used to associate layout information for presentation with a layout number. The LCT may be stored in the PA message.

(4) ECM
The Entity Control Message (ECM) is common information composed of program information and control information, and delivers key information for descrambling. The ECM may be stored in the M2 section message.

(5) EMM
The Entity Management Message (EMM) transmits individual information including contract information for each subscriber and key information for decrypting ECM (common information). The EMM may be stored in the M2 section message.

(6) CAT (MH)
A CA table (Conditional Access Table: CAT) (MH) is used to store a descriptor for identifying a conditional access system. CAT (MH) may be stored in the CA message.

(7) DCM
The Download Control Message (DCM) transmits key related information including a key for decrypting a transmission path cipher for downloading. The DCM may be stored in the M2 section message.

(8) DMM
Download Management Message (DMM) transmits key-related information including a download key for decrypting DCM. The DMM may be stored in the M2 section message.

(9) MH-EIT
The MH-event information table (MH-Event Information Table: MH-EIT) is time-series information regarding events included in each service. The MH-EIT may be stored in the M2 section message.

(10) MH-AIT
The MH-application information table (MH-Application Information Table: MH-AIT) stores all information related to the application, an activation state required for the application, and the like. The MH-AIT may be stored in the M2 section message.

(11) MH-BIT
The MH-Broadcaster Information Table (MH-BIT) is used for presenting information about broadcasters existing on the network. The MH-BIT may be stored in the M2 section message.

(12) MH-SDTT
The MH-Software Download Trigger Table (MH-Software Download Trigger Table: MH-SDTT) is used for download notification information. The MH-SDTT may be stored in the M2 section message.

(13) MH-SDT
The MH-Service Description Table (MH-Service Description Table: MH-SDT) has a sub-table that represents a service included in a specific TLV stream, and information on the organization channel such as the name of the organization channel and the name of the broadcaster. Is transmitted. The MH-SDT may be stored in the M2 section message.

(14) MH-TOT
The MH-Time Offset Table (MH-TOT) transmits JST time and date (modified Julian date) information. The MH-TOT may be stored in the M2 short section message.

(15) MH-CDT
The MH-Common Data Table (MH-CDT) is used to transmit common data to be stored in the nonvolatile memory in a section format for all receivers that receive the MH-Common Data Table (MH-CDT). The MH-CDT may be stored in the M2 section message.

(16) DDM table The data directory management table (Data Directory Management Table: DDM table) provides a directory structure of files constituting an application in order to separate the file structure of the application from the structure for file transmission. The DDM table may be stored in the data transmission message.

(17) DAM table The data asset management table (Data Asset Management Table: DAM table) provides the configuration of the MPU in the asset and version information for each MPU. The DAM table may be stored in the data transmission message.

(18) DCC Table The data content management table (Data Content Configuration Table: DCC table) provides file configuration information as data content in order to realize flexible and effective cache control. The DCC table may be stored in the data transmission message.

(19) EMT
An event message table (Event Message Table: EMT) is used to transmit information about event messages. The EMT may be stored in the M2 section message.

(20) Table set by service provider In addition, it is possible to prepare a table uniquely set by the service service provider.

<Descriptor used in MMT-SI>
FIG. 6C and FIG. 6D show a list of “descriptors” arranged in the MMT-SI of the broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment corresponds. The descriptor is control information that provides more detailed information and is arranged in a table. Note that the table in which the descriptor is arranged may be determined according to the descriptor. In the present embodiment, it is assumed that the following are used as “descriptors” of MMT-SI.

(1) Asset group descriptor The asset group descriptor provides asset group relationships and priorities within groups. The asset group descriptor may be located in the MPT.

(2) Event package descriptor The event package descriptor provides a correspondence between an event representing a program and a package. The event package descriptor may be arranged in the MH-EIT transmitted in the M2 section message.

(3) Background Color Specification Descriptor The background color specification descriptor provides the backmost background color in the layout specification. The background color designation descriptor may be arranged in the LCT.

(4) MPU presentation area designation descriptor The MPU presentation area designation descriptor provides a position for presenting an MPU. The MPU presentation area designation descriptor may be arranged in the MPT.

(5) MPU time stamp descriptor The MPU time stamp descriptor indicates the presentation time of the first access unit in the presentation order in the MPU. The MPU timestamp descriptor may be located in the MPT.

(6) Dependency Descriptor The dependency descriptor provides an asset ID of an asset having a dependency relationship. The dependency descriptor may be arranged in the MPT.

(7) Access control descriptor The access control descriptor provides information for identifying the conditional access system. The access control descriptor may be located in MPT or CAT (MH).

(8) Scramble method descriptor The scramble method descriptor provides information for identifying the type of encryption target and encryption algorithm at the time of scrambling. The scramble method descriptor may be arranged in MPT or CAT (MH).

(9) Message Authentication Scheme Descriptor The message authentication scheme descriptor provides information for identifying the message authentication scheme when performing message authentication. The message authentication scheme descriptor may be arranged in MPT or CAT (MH).

(10) Emergency information descriptor (MH)
The emergency information descriptor (MH) is used when emergency alert broadcasting is performed. The emergency information descriptor (MH) may be located in the MPT.

(11) MH-MPEG-4 Audio Descriptor The MH-MPEG-4 audio descriptor describes basic information for specifying an encoding parameter of an ISO / IEC 14496-3 (MPEG-4 audio) audio stream. Use for. The MH-MPEG-4 audio descriptor may be located in the MPT.

(12) MH-MPEG-4 audio extension descriptor The MH-MPEG-4 audio extension descriptor is used to describe the profile and level of the MPEG-4 audio stream and the settings specific to the encoding method. The MH-MPEG-4 audio extension descriptor may be located in the MPT.

(13) MH-HEVC video descriptor The MH-HEVC video descriptor is an ITU-T recommendation H.264 standard. H.265 | Used to describe basic encoding parameters of ISO / IEC 23008-2 video stream (HEVC stream). The MH-HEVC video descriptor may be located in the MPT.

(14) MH-Link Descriptor The MH-Link Descriptor identifies a service provided when a viewer requests additional information related to a certain thing described in the program sequence information system. The MH-link descriptor may be arranged in MPT, MH-EIT, MH-SDT, etc.

(15) MH-event group descriptor The MH-event group descriptor is used to indicate that these event groups are grouped when there is a relationship between a plurality of events. The MH-event group descriptor may be located in the MH-EIT.

(16) MH-service list descriptor The MH-service list descriptor provides a list of services according to service identification and service type. The MH-service list descriptor may be arranged in the MH-BIT.

(17) MH-short format event descriptor The MH-short format event descriptor represents an event name and a short description of the event in a text format. The MH-short form event descriptor may be located in the MH-EIT.

(18) MH-extended format event descriptor The MH-extended format event descriptor is used in addition to the MH-short format event descriptor to provide a detailed description of the event. The MH-extended event descriptor may be located in the MH-EIT.

(19) Video Component Descriptor The video component descriptor indicates parameters and explanations related to the video component, and is also used to represent an elementary stream in a character format. The video component descriptor may be arranged in MPT or MH-EIT.

(20) MH-stream identification descriptor The MH-stream identification descriptor is used to label the component stream of the service and to refer to the description content indicated by the video component descriptor in the MH-EIT. . The MH-stream identification descriptor may be arranged in the MPT.

(21) MH-content descriptor The MH-content descriptor indicates the genre of the event. The MH-content descriptor may be located in the MH-EIT.

(22) MH-Parental Rate Descriptor The MH-Parental Rate Descriptor represents viewing restrictions based on age, and is used to extend based on other restriction conditions. The MH-parental rate descriptor may be located in MPT or MH-EIT.

(23) MH-voice component descriptor The MH-voice component descriptor indicates each parameter of the voice elementary stream, and is also used to represent the elementary stream in a character format. The MH-voice component descriptor may be located in MPT or MH-EIT.

(24) MH-Target Area Descriptor The MH-target area descriptor is used to describe an area targeted by a program or a part of streams constituting the program. The MH-target area descriptor may be located in the MPT.

(25) MH-series descriptor The MH-series descriptor is used to identify a series program. The MH-series descriptor may be located in the MH-EIT.

(26) MH-SI transmission parameter descriptor The MH-SI transmission parameter descriptor is used to indicate a transmission parameter of SI. The MH-SI transmission parameter descriptor may be arranged in the MH-BIT.

(27) MH-Broadcaster name descriptor The MH-Broadcaster name descriptor describes the name of the broadcaster. The MH-Broadcaster name descriptor may be located in the MH-BIT.

(28) MH-Service Descriptor The MH-Service Descriptor represents the formation channel name and its operator name with a character code together with the service type. The MH-service descriptor may be located in the MH-SDT.

(29) IP Data Flow Descriptor The IP data flow descriptor provides information on the IP data flow constituting the service. The IP data flow descriptor may be located in the MH-SDT.

(30) MH-CA activation descriptor The MH-CA activation descriptor describes activation information for activating a CAS program on the CAS infrastructure. The MH-CA activation descriptor may be located in MPT or CAT (CA).

(31) MH-Type descriptor The MH-Type descriptor indicates the type of a file transmitted by the application transmission method. The MH-Type descriptor may be arranged in the DAM table.

(32) MH-Info Descriptor The MH-Info descriptor describes information related to the MPU or item. The MH-Info descriptor may be placed in the DAM table.

(33) MH-Expire descriptor The MH-Expire descriptor describes the expiration date of an item. The MH-Expire descriptor may be arranged in the DAM table.

(34) MH-Compression Type Descriptor The MH-Compression Type descriptor means that the item to be transmitted is compressed, and indicates the compression algorithm and the number of bytes of the item before compression. The MH-Compression Type descriptor may be placed in the DAM table.

(35) MH-data encoding scheme descriptor The MH-data encoding scheme descriptor is used to identify a data encoding scheme. The MH-data encoding scheme descriptor may be arranged in the MPT.

(36) UTC-NPT Reference Descriptor The UTC-NPT reference descriptor is used to convey the relationship between NPT (Normal Play Time) and UTC. The UTC-NPT reference descriptor may be located in the EMT.

(37) Event message descriptor The event message descriptor conveys information related to event messages in general. The event message descriptor may be located in the EMT.

(38) MH-local time offset descriptor The MH-local time offset descriptor is used to give a certain offset value to the actual time (for example, UTC + 9 hours) and the display time to the human system during daylight saving time. The MH-local time offset descriptor may be located in the MH-TOT.

(39) MH-component group descriptor The MH-component group descriptor defines and identifies a combination of components in an event. The MH-component group descriptor may be located in the MH-EIT.

(40) MH-logo transmission descriptor The MH-logo transmission descriptor is used to describe a character string for a simple logo, pointing to a CDT format logo, and the like. The MH-logo transmission descriptor may be arranged in the MH-SDT.

(41) MPU extended time stamp descriptor The MPU extended time stamp descriptor provides the decoding time of the access unit in the MPU. The MPU extended timestamp descriptor may be placed in the MPT.

(42) MPU download content descriptor The MPU download content descriptor is used to describe attribute information of content downloaded using the MPU. The MPU download content descriptor may be arranged in MH-SDTT.

(43) MH-Network Download Content Descriptor The MH-Network Download Content Descriptor is used to describe attribute information of content downloaded using the network. The MH-network download content descriptor may be located in the MH-SDTT.

(44) MH-application descriptor The MH-application descriptor describes application information. The MH-application descriptor may be located in the MH-AIT.

(45) MH-Transmission Protocol Descriptor The MH-Transmission Protocol Descriptor is used for designating a transmission protocol such as broadcasting or communication and indicating location information of an application depending on the transmission protocol. The MH-Transmission Protocol Descriptor may be located in the MH-AIT.

(46) MH-Simple Application Location Descriptor The MH-simple application location descriptor is described in order to indicate details of an application acquisition destination. The MH-simple application location descriptor may be placed in the MH-AIT.

(47) MH-application boundary authority setting descriptor The MH-application boundary authority setting descriptor is described in order to set an application boundary and to set broadcast resource access authority for each area (URL). The MH-application boundary authority setting descriptor may be arranged in the MH-AIT.

(48) MH-Activation Priority Information Descriptor The MH-activation priority information descriptor is described for designating the application activation priority. The MH-activation priority information descriptor may be arranged in the MH-AIT.

(49) MH-cache information descriptor The MH-cache information descriptor is described for use in cache control in the case where resources constituting an application are cached and held when application reuse is assumed. . The MH-cache information descriptor may be arranged in the MH-AIT.

(50) MH-Probabilistic Application Delay Descriptor The MH-probabilistic application delay descriptor is used to delay application control timing by a stochastically set delay amount assuming load distribution of server access for application acquisition. Describe in. The MH-stochastic application delay descriptor may be placed in the MH-AIT.

(51) Link destination PU descriptor The link destination PU descriptor describes another presentation unit that may transition from the presentation unit (PU). The link destination PU descriptor may be arranged in the DCC table.

(52) Lock cache specification descriptor The lock cache specification descriptor describes the specification of a file to be cached and locked in the presentation unit. The lock cache designation descriptor may be arranged in the DCC table.

(53) Unlock cache specification descriptor The unlock cache specification descriptor describes the specification of the file to be unlocked among the files locked in the presentation unit. The unlock cache specification descriptor may be arranged in the DCC table.

(54) Descriptor set by service provider In addition, it is possible to prepare a descriptor uniquely set by the service service provider.

<Relationship between data transmission and control information in MMT system>
Here, the relationship between data transmission and a representative table in a broadcasting system supported by the broadcast receiving apparatus 100 of this embodiment will be described with reference to FIG. 6E.

  In the broadcast system supported by the broadcast receiving apparatus 100 according to the present embodiment, data transmission can be performed through a plurality of paths such as a TLV stream via a broadcast transmission path and an IP data flow via a communication line. The TLV stream includes a TLV-SI such as TLV-NIT or AMT, and an IP data flow that is a data flow of an IP packet. The IP data flow includes video assets including a series of video MPUs and audio assets including a series of audio MPUs. Similarly, a subtitle asset including a series of subtitle MPUs, a character super asset including a series of character super MPUs, a data asset including a series of data MPUs, and the like may be included in the IP data flow. These various assets are associated in units of “packages” by MPT (MMT package table) that is stored and transmitted in the PA message. Specifically, the package ID (corresponding to the “MMT_package_id_byte” parameter shown in FIG. 17 described later) and the asset ID of each asset included in the package (corresponding to the “asset_id_byte” parameter shown in FIG. 17 described later) are stored in the MPT. Is described, the association is performed.

The asset that constitutes the package may be only the asset in the TLV stream, but as shown in FIG. 6E, the asset that is transmitted by the IP data flow of the communication line may be included. This is because the location information of each asset included in the package (corresponding to “MMT_general_location_info ()” shown in FIG. 17 described later) is included in the MPT, and the broadcast receiving apparatus 100 of the present embodiment specifies the reference destination of each asset. This can be realized by making it possible to grasp. Specifically, by changing the value of the “MMT_general_location_infolocation_type” parameter placed in the location information,
(1) Data multiplexed in the same IP data flow as MPT (location_type = 0x00)
(2) Data multiplexed in IPv4 data flow (location_type = 0x01)
(3) Data multiplexed in the IPv6 data flow (location_type = 0x02)
(4) Data multiplexed in broadcast MPEG2-TS (location_type = 0x03)
(5) Data multiplexed in the IP data flow in MPEG2-TS format (location_type = 0x04)
(6) Data at the specified URL (location_type = 0x05)
For example, the broadcast receiving device 100 can refer to various data transmitted through various transmission paths.

  Among the above-mentioned reference destinations, (1) is an IP data flow received via a digital broadcast signal received by a tuner / demodulator 131 of the broadcast receiving apparatus 100 of FIG. When the MPT is transmitted including the IP data flow on the communication line side, the reference destination of (1) may be an IP data flow received by the LAN communication unit 121 described later via the communication line. The above (2), (3), (5), and (6) are IP data flows received by the LAN communication unit 121 (described later) via a communication line. Also, (4) is a receiving function for receiving a digital broadcast signal using the MMT system and a digital broadcast using the MPEG2-TS system, as in the broadcast receiving apparatus 800 of the second embodiment shown in FIG. In the case of a broadcast receiving apparatus having both reception functions for receiving a signal, digital broadcasting using the MPEG2-TS system based on MPT location information ("MMT_general_location_info ()") included in a digital broadcasting signal using the MMT system It can be used when referring to data multiplexed in MPEG2-TS received by a reception function for receiving a signal.

  The data constituting the “package” is specified in this way, but in the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment, a series of data in the “package” unit is converted into the “service” unit of digital broadcasting. Treat as.

  Furthermore, the MPT includes presentation time information (corresponding to the “mpu_presentation_time” parameter shown in FIG. 13B described later) of each MPU specified by the MPT, and a plurality of MPTs specified by the MPT using the presentation time information. The MPU can be presented (displayed, output, etc.) in conjunction with a clock based on NTP, which is time information expressed in UTC. The presentation control of various data using a clock based on the NTP will be described later.

  In the data transmission system of this embodiment shown in FIG. 6E, there is a further concept of “event”. The “event” is a concept indicating a so-called “program” that is handled by the MH-EIT sent in the M2 section message. Specifically, in the “package” indicated by the event package descriptor stored in the MH-EIT, the duration from the disclosure time stored in the MH-EIT (corresponding to the “start_time” parameter shown in FIG. 21 described later). A series of data included in the period (corresponding to a “duration” parameter shown in FIG. 21 described later) is data included in the concept of the “event”. The MH-EIT performs various processes in units of the “event” in the broadcast receiving apparatus 100 according to the present embodiment (for example, program table generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage). Can be used.

[Hardware configuration of broadcast receiver]
FIG. 7A is a block diagram illustrating an example of an internal configuration of the broadcast receiving apparatus 100. The broadcast receiving apparatus 100 includes a main control unit 101, a system bus 102, a ROM 103, a RAM 104, a storage (storage) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 125, a tuner / demodulation unit 131, and a separation unit 132. , Video decoder 141, video color gamut conversion unit 142, audio decoder 143, character super decoder 144, subtitle decoder 145, subtitle synthesis unit 146, subtitle color gamut conversion unit 147, data decoder 151, cache unit 152, application control unit 153, A browser unit 154, an application color gamut conversion unit 155, a sound source unit 156, a video synthesis unit 161, a monitor unit 162, a video output unit 163, a voice synthesis unit 164, a speaker unit 165, a voice output unit 166, and an operation input unit 170. Is done.

  The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving apparatus 100 in accordance with a predetermined operation program. A system bus 102 is a data communication path for transmitting and receiving data between the main control unit 101 and each operation block in the broadcast receiving apparatus 100.

  A ROM (Read Only Memory) 103 is a non-volatile memory in which a basic operation program such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM (Electrically Erasable Programmable ROM) or a flash ROM is used. Used. The ROM 103 may store operation setting values necessary for the operation of the broadcast receiving apparatus 100. A RAM (Random Access Memory) 104 serves as a work area for executing a basic operation program and other operation programs. The ROM 103 and the RAM 104 may be integrated with the main control unit 101. Further, the ROM 103 may not use an independent configuration as shown in FIG. 7A but may use a partial storage area in the storage (accumulation) unit 110.

  The storage (storage) unit 110 stores an operation program and an operation setting value of the broadcast receiving apparatus 100, personal information of a user of the broadcast receiving apparatus 100, and the like. Further, it is possible to store an operation program downloaded via the Internet 200 and various data created by the operation program. It is also possible to store content such as moving images, still images, and audio obtained from broadcast waves or downloaded via the Internet 200. All or some of the functions of the ROM 103 may be replaced by a partial area of the storage (storage) unit 110. Further, the storage (accumulation) unit 110 needs to hold stored information even when power is not supplied to the broadcast receiving apparatus 100 from the outside. Therefore, for example, a device such as a nonvolatile semiconductor element memory such as a flash ROM or SSD (Solid State Drive), a magnetic disk drive such as an HDD (Hard Disc Drive), or the like is used.

  The operation programs stored in the ROM 103 and the storage (accumulation) unit 110 can be added, updated, and expanded in function by download processing from each server device on the Internet 200.

  A LAN (Local Area Network) communication unit 121 is connected to the Internet 200 via a router device 200r, and transmits and receives data to and from each server device and other communication devices on the Internet 200. It is also assumed that an MMT data string (or a part thereof) of a program transmitted via a communication line is acquired. The connection with the router device 200r may be a wired connection or a wireless connection such as Wi-Fi (registered trademark). The LAN communication unit 121 includes an encoding circuit, a decoding circuit, and the like. The broadcast receiving apparatus 100 may further include other communication units such as a BlueTooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

  The tuner / demodulation unit 131 receives a broadcast wave transmitted from the radio tower 300t via the antenna 100a, and tunes (tunes) to a service channel desired by the user based on the control of the main control unit 101. Further, the tuner / demodulator 131 demodulates the received broadcast signal to obtain an MMT data string. In the example shown in FIG. 7A, a configuration with one tuner / demodulation unit is illustrated. However, for the purpose of simultaneous display of a plurality of screens, back program recording, and the like, the broadcast receiving apparatus 100 includes a tuner / demodulation unit. It is good also as a structure mounted in multiple numbers.

  The separation unit 132 is an MMT decoder, and a video data sequence, an audio data sequence, a character super data sequence, a caption data sequence, etc., which are real-time presentation elements based on a control signal in the input MMT data sequence, are respectively converted into a video decoder 141. The voice decoder 143, the character super decoder 144, the subtitle decoder 145, etc. are distributed. The data input to the demultiplexing unit 132 includes an MMT data sequence transmitted through a broadcast transmission path and demodulated by the tuner / demodulation unit 131, or MMT data transmitted through a communication line and received by the LAN communication unit 121. It can be a line. In addition, the separation unit 132 reproduces the multimedia application and file system data that is a component of the multimedia application, and temporarily stores them in the cache unit 152. In addition, the separation unit 132 extracts general-purpose data and outputs the data to the data decoder 151 for use in streaming data for use with a player that presents data other than video / audio subtitles or data for an application. Further, the separation unit 132 may perform error correction, access restriction control, and the like on the input MMT data string based on the control of the main control unit 101.

  The video decoder 141 decodes the video data sequence input from the separation unit 132 and outputs video information. The video color gamut conversion unit 142 performs color space conversion processing on the video information decoded by the video decoder 141 as needed for video synthesis processing by the video synthesis unit 161. The audio decoder 143 decodes the audio data sequence input from the separation unit 132 and outputs audio information. The video decoder 141 and the audio decoder 143 are also supplied with streaming data in the MPEG-DASH (MPEG-Dynamic Adaptive Streaming HTTP) format obtained from the Internet 200 via the LAN communication unit 121, for example. good. A plurality of video decoders 141, video color gamut conversion units 142, audio decoders 143, and the like may be provided in order to simultaneously decode a plurality of types of video data sequences and audio data sequences.

  The character super decoder 144 decodes the character super data string input from the separation unit 132 and outputs character super information. The caption decoder 145 decodes the caption data string input from the separation unit 132 and outputs caption information. The superimposing information output from the character super decoder 144 and the subtitle information output from the subtitle decoder 145 are subjected to the synthesizing process in the subtitle synthesizing unit 146, and further, the subtitle color gamut converting unit 147 performs the synthesis in the video synthesizing unit 161. For the video composition process, a color space conversion process is performed as necessary. In the present embodiment, among the services centered on character information that are presented simultaneously with the broadcast program video, those related to the content of the video are referred to as subtitles, and other services are referred to as character supermarkets. To do. If they are not distinguished, they are collectively referred to as subtitles.

  The browser unit 154 transmits the multimedia application file acquired from the server device on the Internet 200 via the cache unit 152 or the LAN communication unit 121 and the file system data that is a component of the multimedia application file to the control information or LAN included in the MMT data string. The control information acquired from the server device on the Internet 200 via the communication unit 121 is presented according to an instruction from the application control unit 153 that interprets the control information. The multimedia application file may be an HTML (Hyper Text Markup Language) document, a BML (Broadcast Markup Language) document, or the like. The application information output from the browser unit 154 is further subjected to color space conversion processing in the application color gamut conversion unit 155 as necessary for the video composition processing in the video composition unit 161. The browser unit 154 also plays the application audio information by acting on the sound source unit 156.

  The video composition unit 161 receives the video information output from the video color gamut conversion unit 142, the caption information output from the subtitle color gamut conversion unit 147, the application information output from the application color gamut conversion unit 155, and the like. Processing such as selection and / or superposition is performed. The video composition unit 161 includes a video RAM (not shown), and the monitor unit 162 and the like are driven based on video information and the like input to the video RAM. Further, the video composition unit 161 is based on the control of the main control unit 101, and an EPG (Electronic Program Guide) created based on information such as scaling processing and MH-EIT included in the MMT-SI as necessary. Performs superimposition processing of screen information. The monitor unit 162 is a display device such as a liquid crystal panel, for example, and provides video information selected and / or superimposed by the video composition unit 161 to the user of the broadcast receiving apparatus 100. The video output unit 163 is a video output interface that outputs the video information that has been selected and / or superimposed by the video composition unit 161.

  It is assumed that the presentation function of the broadcast receiving apparatus 100 of the present embodiment has a logical plane structure in order to display the multimedia service as intended by the provider. FIG. 7B shows an example of the configuration of the logical plane structure provided in the presentation function of the broadcast receiving apparatus 100 of the present embodiment. In the logical plane structure, a character super plane for displaying a character super is arranged on the foreground, and a subtitle plane for displaying a subtitle is arranged on the next layer. In the third layer, a multimedia plane for displaying a broadcast video, a multimedia application, or a composite video thereof is arranged, and a background plane is arranged on the backmost surface. In the caption synthesizing unit 146 and the video synthesizing unit 161, drawing of the character super information on the character super plane, drawing of the subtitle information on the subtitle plane, and drawing on the multimedia plane such as video information and application information are performed. In addition, the background color is drawn on the background plane based on LCT or the like included in the MMT-SI. Note that a plurality of multimedia planes in the third layer can be prepared according to the number of video decoders 141. However, even when there are a plurality of multimedia planes, the application information and the like output from the application color gamut conversion unit 155 are output only to the foreground multimedia plane.

  The voice synthesis unit 164 receives the voice information output from the voice decoder 143 and the application voice information reproduced by the sound source unit 156, and performs processing such as selection and / or mixing as appropriate. The speaker unit 165 provides the user of the broadcast receiving apparatus 100 with the audio information that has been selected and / or mixed by the voice synthesis unit 164. The audio output unit 166 is an audio output interface that outputs audio information that has been selected and / or mixed by the audio synthesis unit 164.

  The extension interface unit 124 is an interface group for extending the function of the broadcast receiving apparatus 100. In this embodiment, the extension interface unit 124 includes an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. To do. The analog video / audio interface performs input of analog video signals / audio signals from external video / audio output devices, output of analog video signals / audio signals to external video / audio input devices, and the like. The USB interface is connected to a PC or the like to transmit / receive data. A broadcast program or content may be recorded by connecting an HDD. A keyboard or other USB device may be connected. The memory interface transmits and receives data by connecting a memory card and other memory media.

  The digital interface unit 125 is an interface that outputs or inputs encoded digital video data and / or digital audio data. The digital interface unit 125 can output the MMT data sequence obtained by demodulation by the tuner / demodulation unit 131, the MMT data sequence obtained via the LAN communication unit 121, or the mixed data of each MMT data sequence as it is. Shall. Further, the MMT data string input from the digital interface unit 125 may be controlled to be input to the separation unit 132. Output of digital content stored in the storage (accumulation) unit 110 or storage of digital content in the storage (accumulation) unit 110 may be performed via the digital interface unit 125.

  The digital interface unit 125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and outputs or inputs data in a format compliant with the DVI specification, the HDMI specification, the Display Port specification, or the like. It may be a thing. The data may be output or input in the form of serial data conforming to the IEEE 1394 specification or the like. Further, it may be configured as an IP interface that performs digital interface output via hardware such as Ethernet (registered trademark) or wireless LAN. In this case, the digital interface unit 125 and the LAN communication unit 121 may share the hardware configuration.

  The operation input unit 170 is an instruction input unit that inputs an operation instruction to the broadcast receiving apparatus 100. In this embodiment, a remote control receiving unit that receives a command transmitted from a remote controller (not shown) and a button switch are arranged. It shall consist of operation keys. Either one may be sufficient. Further, the operation input unit 170 may be replaced with a touch panel arranged on the monitor unit 162. A keyboard connected to the extension interface unit 124 may be substituted. The remote controller (not shown) may be replaced with a portable information terminal 700 having a remote command transmission function.

  As described above, when the broadcast receiving apparatus 100 is a television receiver or the like, the video output unit 163 and the audio output unit 166 are not essential components in the present invention. In addition to the television receiver, the broadcast receiving apparatus 100 may be an optical disk drive recorder such as a DVD (Digital Versatile Disc) recorder, a magnetic disk drive recorder such as an HDD recorder, an STB (Set Top Box), or the like. It may be a PC (Personal Computer), a tablet terminal, a navigation device, a game machine or the like having a digital broadcast receiving function or a broadcast communication cooperation function. When the broadcast receiving apparatus 100 is a DVD recorder, HDD recorder, STB, or the like, the monitor unit 162 and the speaker unit 165 may not be provided. By connecting an external monitor and an external speaker to the video output unit 163, the audio output unit 166, or the digital interface unit 125, an operation similar to that of the broadcast receiving apparatus 100 of the present embodiment is possible.

[System configuration for clock synchronization / presentation synchronization of broadcast receivers]
FIG. 7C is an example of a system configuration of clock synchronization / presentation synchronization in a broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In the broadcast system of the present embodiment, UTC is transmitted from the broadcast transmission system to a receiver (such as the broadcast receiving device 100 of the present embodiment) in the 64-bit NTP timestamp format. In the NTP timestamp format, “seconds or more” of UTC is represented by 32 bits, and “less than seconds” is represented by 32 bits. However, in practice, it is difficult to reproduce 1 second with 32-bit accuracy. For this reason, as a system clock for synchronizing the video system and a system clock for operating an NTP clock, for example, as shown in the figure, “2 24” Hz (about 16.8 MHz) The frequency may be used. In view of the fact that the system clock in the conventional broadcasting system was 27 MHz and the hardware configuration of the receiver can be easily constructed, the number of "2 24" to "2 28" It is desirable to employ a power frequency as the system clock.

  If the system clock is set to a power of 2 such as “2 to the 24th power” to “2 to the 28th power” as described above on the broadcast transmission system side or the receiver side, it is received from the broadcast transmission system side. In the NTP time stamp format transmitted to the machine side, the lower 8 to 4 bits which are not referred to by the PLL (Phase Locked Loop) system for reproducing the system clock or the NTP clock are “0” or “1”. You may make it fix to. That is, if the system clock is “2 to the power of n” Hz (n = 24 in the example of FIG. 7C), the lower “32-n” bits of the NTP timestamp format are fixed to “0” or “1”. You may do it. Alternatively, the receiver side may perform processing so as to ignore the lower “32-n” bits of the NTP timestamp format.

  On the broadcast transmission system side, when time information in the NTP format is obtained from the outside, a PLL system is configured by a 32 + n bit counter by a VCO (Voltage Controlled Oscillator) of “2 to the power of n” Hz, and the time information given from the outside Realizing a synchronized sending system clock. Further, the entire signal processing system is operated in synchronization with a system clock of “2 to the power of n” Hz. Further, the output of the transmission system clock is periodically transmitted to the receiver side through the broadcast transmission path as time information in the NTP length format.

  On the receiver side, time information in the NTP length format is received via the broadcast transmission path, and the reception system clock is reproduced by a PLL system based on a VCO of “2 to the power of n” Hz as in the broadcast transmission system side. Thereby, the reception system clock becomes a clock synchronized with the broadcast transmission system side. In addition, by operating the signal processing system of the receiver in synchronization with the system clock of “2 to the power of n” Hz, clock synchronization between the broadcast transmission system side and the receiver side is realized, and stable signal reproduction is possible. Become. Also, the decoding time and the presentation time for each presentation unit of the video / audio signal are set on the broadcast transmission system side based on the time information in the NTP format. Here, the MPT time stamp descriptor shown in FIG. 13B described later is stored in the MPT stored in the PA message transmitted by the broadcast signal. The “mpu_sequence_number (MPU sequence number)” parameter in the MPU time stamp descriptor of FIG. 13B indicates the sequence number of the MPU describing the time stamp, and the “mpu_presentation_time (MPU presentation time)” parameter indicates the MPU presentation time in 64-bit NTP. It is shown in time stamp format. Therefore, the receiver can refer to the MPU time stamp descriptor stored in the MPT and control the presentation (display, output, etc.) timing for each MPU such as a video signal, an audio signal, a caption, and a character supermarket. .

  When focusing on the decoding timing and presentation timing control for each presentation unit such as the video / audio signal described above, the video / audio signal is synchronized even with a clock of about "2 to the 16th power" Hz (about 65.5 KHz). In this case, it is not necessary to refer to the lower 16 bits of the NTP timestamp format described in the MPU timestamp descriptor or the like. In other words, when a clock of “2 to the power of m” generated by dividing the system clock is used to control the decoding timing and presentation timing, the lower order of the NTP timestamp format described in the MPU timestamp descriptor etc. The “32-m” bit need not be referenced. Therefore, the lower “32-m” bits of the NTP timestamp format described in the MPU timestamp descriptor or the like may be fixed to “0” or “1”.

[Broadcast receiving device software configuration]
FIG. 7D is a software configuration diagram of the broadcast receiving apparatus 100 of the present embodiment, and shows a software configuration in the ROM 103, the RAM 104, and the storage (storage) unit 110. In this embodiment, a basic operation program 1001 and other operation programs are stored in the ROM 103, and a reception function program 1002 and other operation programs are stored in the storage (storage) unit 110. The storage unit 110 also stores a content storage area 1200 that stores content such as moving images, still images, and audio, and authentication information that is necessary when accessing an external mobile terminal device or each server device. It is assumed that an information storage area 1300 and various information storage areas for storing various other information are provided.

  A basic operation program 1001 stored in the ROM 103 is expanded in the RAM 104, and the main control unit 101 executes the expanded basic operation program to constitute a basic operation execution unit 1101. Similarly, the reception function program 1002 stored in the storage (accumulation) unit 110 is also expanded in the RAM 104, and the main control unit 101 executes the expanded reception function program to configure the reception function execution unit 1102. To do. The RAM 104 is provided with a temporary storage area that temporarily holds data created when each operation program is executed as necessary.

  In the following, in order to simplify the explanation, the main control unit 101 executes the basic operation processing to control each operation block by expanding the basic operation program 1001 stored in the ROM 103 into the RAM 104 and executing it. The unit 1101 is described as performing control of each operation block. The same description is made for other operation programs.

  The reception function execution unit 1102 controls each operation block of the broadcast receiving apparatus 100 in order to reproduce components such as video and audio transmitted in the broadcast system of this embodiment. In particular, the transport processing unit 1102a mainly controls the MMT decoder function of the separation unit 132, and distributes the video data sequence, the audio data sequence, and the like separated from the MMT data sequence to the corresponding decoding processing units. The AV decoding processing unit 1102b mainly controls the video decoder 141, the audio decoder 143, and the like. The application processing unit 1102c mainly controls the cache unit 152, the application control unit 153, the browser unit 154, and the sound source unit 156. The character super processing unit 1102d mainly controls the character super decoder 144. The caption processing unit 1102e mainly controls the caption decoder 145. The general-purpose data processing unit 1102f mainly controls the data decoder 151. The EPG generation unit 1102g generates an EPG screen by interpreting description contents such as MH-EIT included in the MMT-SI. The presentation processing unit 1102h is based on the logical plane structure, and the video color gamut conversion unit 142, the subtitle synthesis unit 146, the subtitle color gamut conversion unit 147, the application color gamut conversion unit 155, the video synthesis unit 161, and the audio synthesis unit 164. Is mainly controlled.

  Each operation program may be stored in the ROM 103 and / or the storage (storage) unit 110 in advance at the time of product shipment. It may be acquired from the other application server 500 on the Internet 200 via the LAN communication unit 121 after the product is shipped. Further, each operation program stored in a memory card, an optical disk or the like may be acquired via the expansion interface unit 124 or the like.

[Broadcasting station server configuration]
FIG. 8 is a block diagram illustrating an example of the internal configuration of the broadcast station server 300. The broadcast station server 300 includes a main control unit 301, a system bus 302, a RAM 304, a storage unit 310, a LAN communication unit 321 and a digital broadcast signal transmission unit 360.

  The main control unit 301 is a microprocessor unit that controls the entire broadcast station server 300 in accordance with a predetermined operation program. A system bus 302 is a data communication path for performing data transmission / reception between the main control unit 301 and each operation block in the broadcast station server 300. The RAM 304 serves as a work area when executing each operation program.

  The storage unit 310 stores a basic operation program 3001, a broadcast content management / distribution program 3002, and a broadcast content transmission program 3003, and further includes a broadcast content storage area 3200 and a metadata storage area 3300. The broadcast content storage area 3200 stores program content and the like of each broadcast program broadcast by the broadcast station. The metadata storage area 3300 stores metadata such as the program title, program ID, program overview, performers, broadcast date and time, copy control information related to each program content, and the like of each broadcast program.

  The basic operation program 3001, the broadcast content management / distribution program 3002, and the broadcast content transmission program 3003 stored in the storage unit 310 are expanded in the RAM 304, and the main control unit 301 further executes the expanded programs. Thus, a basic operation execution unit 3101, a broadcast content management / distribution execution unit 3102, and a broadcast content transmission execution unit 3103 are configured.

  In the following, in order to simplify the description, a process for controlling each operation block by causing the main control unit 301 to expand the basic operation program 3001 stored in the storage unit 310 to the RAM 304 and execute the basic operation program 3001 will be described. The operation execution unit 3101 is described as performing control of each operation block. The same description is made for other operation programs.

  The broadcast content management / distribution execution unit 3102 manages the program content and the like of each broadcast program stored in the broadcast content storage area 3200 and the metadata storage area 3300, the program content of each broadcast program, and the like. Performs control when providing metadata to service providers based on contracts. Furthermore, the broadcast content management / distribution execution unit 3102 provides a service provider based on the contract as necessary when providing the service provider with the program content of each broadcast program and each metadata. Authentication processing of the server 400 may be performed.

  The broadcast content transmission execution unit 3103 displays the program content of the broadcast program stored in the broadcast content storage area 3200, the program title of the broadcast program stored in the metadata storage area 3300, the program ID, copy control information of the program content, and the like. Time schedule management and the like are performed when an MMT data string including the MMT data string is transmitted from the radio tower 300t via the digital broadcast signal transmission unit 360.

  The LAN communication unit 321 is connected to the Internet 200 and communicates with the service provider server 400 on the Internet 200. The LAN communication unit 321 includes a coding circuit, a decoding circuit, and the like. The digital broadcast signal transmission unit 360 modulates the MMT data sequence composed of the video data sequence, the audio data sequence, the program information data sequence, etc. of the program content of each broadcast program stored in the broadcast content storage area 3200. The digital broadcast wave is transmitted through the radio tower 300t.

[Service provider server configuration]
FIG. 9 is a block diagram illustrating an example of the internal configuration of the service provider server 400. The service provider server 400 includes a main control unit 401, a system bus 402, a RAM 404, a storage unit 410, and a LAN communication unit 421.

  The main control unit 401 is a microprocessor unit that controls the entire service provider server 400 according to a predetermined operation program. A system bus 402 is a data communication path for transmitting and receiving data between the main control unit 401 and each operation block in the service provider server 400. The RAM 404 becomes a work area when each operation program is executed.

  The storage unit 410 stores a basic operation program 4001, a video content management / distribution program 4002, and an application management / distribution program 4004, and further stores a video content storage area 4200, a metadata storage area 4300, an application storage area 4400, and user information storage. An area 4500 is provided. The video content storage area 4200 stores program content of a broadcast program provided from the broadcast station server 300 as video content. In addition, the video content produced by the service provider is stored. The metadata storage area 4300 stores each metadata provided from the broadcast station server 300, metadata about video content produced by the service provider, and the like. The application storage area 4400 stores various applications for realizing a service linked to a broadcast program for distribution in response to a request from each television receiver. The user information storage area 4500 stores information (such as personal information and authentication information) related to users who are permitted to access the service provider server 400.

  The basic operation program 4001, the video content management / distribution program 4002 and the application management / distribution program 4004 stored in the storage unit 410 are expanded in the RAM 404, and the main control unit 401 further expands the basic operation program and the video. By executing the content management / distribution program and the application management / distribution program, a basic operation execution unit 4101, a video content management / distribution execution unit 4102, and an application management / distribution execution unit 4104 are configured.

  In the following, in order to simplify the description, a process for controlling each operation block by the main control unit 401 by developing the basic operation program 4001 stored in the storage unit 410 in the RAM 404 and executing the basic operation program 4001 will be described. It is described that the operation execution unit 4101 controls each operation block. The same description is made for other operation programs.

  The video content management / distribution execution unit 4102 obtains the program content and the metadata of the broadcast program from the broadcasting station server 300, the video content stored in the video content storage area 4200 and the metadata storage area 4300, and each metadata. And the distribution of the video content etc. and each metadata to each television receiver. Furthermore, the video content management / distribution execution unit 4102 performs authentication processing and the like of each television receiver as necessary when delivering each video content and each metadata to each television receiver. You can go. The application management / distribution execution unit 4104 performs management of each application stored in the application storage area 4400 and control when each application is distributed in response to a request from each television receiver. Furthermore, the application management / distribution execution unit 4104 may perform authentication processing of each television receiver as necessary when distributing each application to each television receiver.

  The LAN communication unit 421 is connected to the Internet 200 and communicates with the broadcast receiving device 100 via the broadcast station server 300 on the Internet 200 and the router device 200r. The LAN communication unit 421 includes a coding circuit, a decoding circuit, and the like.

[Hardware configuration of portable information terminal]
FIG. 10A is a block diagram illustrating an example of the internal configuration of the portable information terminal 700. The portable information terminal 700 includes a main control unit 701, a system bus 702, a ROM 703, a RAM 704, a storage unit 710, a communication processing unit 720, an expansion interface unit 724, an operation unit 730, an image processing unit 740, an audio processing unit 750, and a sensor unit 760. , Composed of.

  The main control unit 701 is a microprocessor unit that controls the entire portable information terminal 700 according to a predetermined operation program. A system bus 702 is a data communication path for transmitting and receiving data between the main control unit 701 and each operation block in the portable information terminal 700.

  The ROM 703 is a memory in which a basic operation program such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM or a flash ROM is used. The RAM 704 serves as a work area when the basic operation program and other operation programs are executed. The ROM 703 and the RAM 704 may be integrated with the main control unit 701. Further, the ROM 703 does not have an independent configuration as shown in FIG. 10A, and may use a partial storage area in the storage unit 710.

  The storage unit 710 stores an operation program and an operation setting value of the portable information terminal 700, personal information of the user of the portable information terminal 700, and the like. Further, it is possible to store an operation program downloaded via the Internet 200 and various data created by the operation program. In addition, contents such as moving images, still images, and audio downloaded via the Internet 200 can be stored. All or part of the functions of the ROM 703 may be replaced by a partial area of the storage unit 710. In addition, the storage unit 710 needs to hold stored information even when power is not supplied to the portable information terminal 700 from the outside. Therefore, for example, a device such as a nonvolatile semiconductor element memory such as a flash ROM or SSD, a magnetic disk drive such as an HDD, or the like is used.

  The operation programs stored in the ROM 703 and the storage unit 710 can be added, updated, and expanded in function by download processing from each server device on the Internet 200.

  The communication processing unit 720 includes a LAN communication unit 721, a mobile telephone network communication unit 722, and an NFC communication unit 723. The LAN communication unit 721 is connected to the Internet 200 via the router device 200r and the access point 200a, and transmits / receives data to / from each server device and other communication devices on the Internet 200. It is assumed that the connection with the router device 200r and the access point 200a is made by wireless connection such as Wi-Fi (registered trademark). The mobile telephone network communication unit 722 performs telephone communication (call) and data transmission / reception by wireless communication with the base station 600b of the mobile telephone communication network. The NFC communication unit 723 performs wireless communication when close to the corresponding reader / writer. The LAN communication unit 721, the mobile telephone network communication unit 722, and the NFC communication unit 723 are each provided with a coding circuit, a decoding circuit, an antenna, and the like. The communication processing unit 720 may further include another communication unit such as a BlueTooth (registered trademark) communication unit or an infrared communication unit.

  The extension interface unit 724 is an interface group for extending the functions of the portable information terminal 700, and in this embodiment, is configured with a video / audio interface, a USB interface, a memory interface, and the like. The video / audio interface performs input of video signals / audio signals from external video / audio output devices, output of video signals / audio signals to external video / audio input devices, and the like. The USB interface is connected to a PC or the like to transmit / receive data. A keyboard or other USB device may be connected. The memory interface transmits and receives data by connecting a memory card and other memory media.

  The operation unit 730 is an instruction input unit that inputs an operation instruction to the portable information terminal 700. In this embodiment, the operation unit 730 includes a touch panel 730t arranged on the display unit 741 and an operation key 730k in which button switches are arranged. Shall. Either one may be sufficient. The portable information terminal 700 may be operated using a keyboard or the like connected to the extension interface unit 724. The portable information terminal 700 may be operated using a separate terminal device connected by wired communication or wireless communication. That is, the portable information terminal 700 may be operated from the broadcast receiving device 100. The touch panel function may be provided in the display unit 741.

  The image processing unit 740 includes a display unit 741, an image signal processing unit 742, a first image input unit 743, and a second image input unit 744. The display unit 741 is a display device such as a liquid crystal panel, for example, and provides the image data processed by the image signal processing unit 742 to the user of the portable information terminal 700. The image signal processing unit 742 includes a video RAM (not shown), and the display unit 741 is driven based on the image data input to the video RAM. In addition, the image signal processing unit 742 has a function of performing format conversion, menu and other OSD (On Screen Display) signal superimposing processing, and the like as necessary. The first image input unit 743 and the second image input unit 744 convert light input from a lens into an electric signal by using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor. A camera unit for inputting image data of surroundings and objects.

  The audio processing unit 750 includes an audio output unit 751, an audio signal processing unit 752, and an audio input unit 753. The audio output unit 751 is a speaker, and provides the audio signal processed by the audio signal processing unit 752 to the user of the portable information terminal 700. The voice input unit 753 is a microphone, and converts a user's voice and the like into voice data and inputs the voice data.

  The sensor unit 760 is a sensor group for detecting the state of the portable information terminal 700. In this embodiment, the GPS reception unit 761, the gyro sensor 762, the geomagnetic sensor 763, the acceleration sensor 764, the illuminance sensor 765, and the proximity sensor 766. , Composed of. With these sensor groups, it is possible to detect the position, tilt, direction, movement, ambient brightness, proximity of nearby objects, and the like of the portable information terminal 700. The portable information terminal 700 may further include other sensors such as a barometric pressure sensor.

  The portable information terminal 700 may be a mobile phone, a smart phone, a tablet terminal, or the like. A PDA (Personal Digital Assistant) or a notebook PC may be used. Further, it may be a digital still camera, a video camera capable of shooting moving images, a portable game machine, a navigation device, or other portable digital devices.

  Note that the configuration example of the portable information terminal 700 illustrated in FIG. 10A includes a number of configurations that are not essential to the present embodiment, such as the sensor unit 760. There is no loss of effect. Further, a configuration not shown in the figure such as a digital broadcast receiving function and an electronic money settlement function may be further added.

[Software configuration of portable information terminal]
FIG. 10B is a software configuration diagram of the portable information terminal 700 of this embodiment, and shows a software configuration in the ROM 703, the RAM 704, and the storage unit 710. In this embodiment, a basic operation program 7001 and other operation programs are stored in the ROM 703, and a cooperation control program 7002 and other operation programs are stored in the storage unit 710. In addition, the storage unit 710 includes a content storage area 7200 for storing contents such as moving images, still images, and audio, an authentication information storage area 7300 for storing authentication information necessary for accessing the television receiver and each server device, It is assumed that various information storage areas for storing other various information are provided.

  A basic operation program 7001 stored in the ROM 703 is expanded in the RAM 704, and the main control unit 701 executes the expanded basic operation program to constitute a basic operation execution unit 7101. Similarly, the cooperative control program 7002 stored in the storage unit 710 is also expanded in the RAM 704, and the main control unit 701 executes the expanded cooperative control program to configure the cooperative control execution unit 7102. The RAM 704 includes a temporary storage area that temporarily stores data created when each operation program is executed as necessary.

  In the following, in order to simplify the explanation, the main control unit 701 executes the basic operation execution by executing the basic operation program 7001 stored in the ROM 703 by expanding the basic operation program 7001 in the RAM 704 and executing it. It is described that the unit 7101 controls each operation block. The same description is made for other operation programs.

  The cooperation control execution unit 7102 performs management such as device authentication and connection, transmission / reception of each data, and the like when the portable information terminal 700 performs a link operation with the television receiver. In addition, the cooperation control execution unit 7102 includes a browser engine function for executing an application that works in conjunction with the television receiver.

  Each operation program may be stored in advance in the ROM 703 and / or the storage unit 710 at the time of product shipment. After the product is shipped, it may be acquired from another application server 500 on the Internet 200 via the LAN communication unit 721 or the mobile telephone network communication unit 722. Further, each operation program stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 724 or the like.

[Time management of broadcast receivers]
The broadcast receiving apparatus of this embodiment has two types of time management functions. The first time management function is a time management function based on NTP, as already described with reference to FIG. 7C. The second time management function is a time management function based on MH-TOT, and is a time managed based on the time information transmitted by MH-TOT described in FIG. 6B.

  An example of the structure of time information transmitted by NTP is shown in FIG. 13A. An example of the data structure of the MPU time stamp descriptor is shown in FIG. 13B. The “reference_timestamp” parameter, the “transmit_timestamp” parameter, etc. in the NTP format are time data in an NTP length format of 64 bits, and the “mpu_presentation_time” parameter in the MPU timestamp descriptor is also an NTP timestamp of 64 bits in length. Format time data. The time data in the NTP length format and the time data in the NTP timestamp format are data in which “seconds or more” of UTC is represented by 32 bits and “sub-seconds” is represented by 32 bits. That is, time information up to “less than second” can be transmitted as time information in the NTP format. Further, since the time information in the NTP format is expressed in UTC, unlike the conventional clock management in digital broadcasting, as shown in FIG. 3B, a communication line path (for example, communication that can be received by the LAN communication unit 121 in FIG. 7A). It is possible to match with NTP included in a signal received via a line.

  On the other hand, the information transmitted by MH-TOT is as follows. The broadcast receiving apparatus 100 is assumed to be able to acquire the current date and Japan standard time by MH-TOT. FIG. 11A shows an example of the data structure of MH-TOT. The broadcast receiving apparatus 100 can acquire the current date and the current time from the “JST_time” parameter of the MH-TOT. As shown in FIG. 11B, the “JST_time” parameter includes the lower 16 bits of the encoded data of the current date based on the modified Julian Date (MJD) and six standard times of Japan (Japan Standard Time: JST). It is assumed that 24-bit information represented by a binary-coded decimal (BCD) is included. It is possible to calculate the current date by performing a predetermined operation on the 16-bit encoded data of MJD. Six 4-bit binary-coded decimal numbers represent “hour” in two decimal digits by two 4-bit binary-coded decimal numbers, and decimal two by the next two 4-bit binary-coded decimal numbers. "Minute" is represented by a digit, and "second" is represented by two decimal digits by the last two 4-bit binary-coded decimal numbers.

  Therefore, the difference between the time based on NTP and the time based on MH-TOT is the information in UTC notation that the former NTP can transmit time information up to “less than second” as described above, whereas MH− The information transmitted by TOT is information up to “second unit” in JST notation.

  The broadcast receiving apparatus 100 according to the present embodiment has a time management function based on NTP, which is time information in UTC notation, and decoding and display synchronization processing of video, audio, subtitles, text super, and other presentation data that are broadcast signal contents. As a result, it is possible to realize a more accurate synchronization process. Furthermore, by referring to information in UTC notation instead of the clock notation of the broadcasting station, it is acquired via the communication line route with video, audio, caption, superimpose, or other data that is the content of the broadcast signal received by the broadcast signal. Decoding and display synchronization processing with video, audio, subtitles, character superimposing, or other data can also be performed.

  Furthermore, the broadcast receiving apparatus of the present embodiment provides a time management function based on “JST_time” including 24-bit information represented by six 4-bit binary-coded decimal numbers of MH-TOT, and presents the current time to the user. What is necessary is just to use for each process which handles a process or the MH-event information table (MH-EIT) demonstrated in FIG. 6B. In general, in the process of presenting the current time to the user in the broadcast receiving device, accuracy to less than a second is rarely required. In addition, each time information described in the MH-event information table (MH-EIT) is represented by six 4-bit binary-coded decimal numbers in the same manner as the EIT of the conventional digital broadcast transmitted by the MPEG2-TS system. The 24-bit information is stored in “decimal” two-digit “hour”, “minute”, and “second”. For this reason, it is because the time management function based on MH-TOT in the broadcast receiving apparatus 100 of the present embodiment is easily matched with the process using MH-EIT. Specifically, the process using the MH-EIT includes a program table generation process (described later), a recording reservation and viewing reservation control, a copyright management process such as temporary storage, and the like. This is because the accuracy of subseconds is rarely required for any processing, and accuracy in units of one second is sufficient.

  In addition, copyright management processing such as program table generation processing, recording reservation and viewing reservation control, and temporary storage is a function that is also installed in a receiver of a conventional digital broadcasting system using the MPEG2-TS system. . Then, also in the broadcasting system of the present embodiment, the conventional MPEG2-TS system digital broadcasting system is used in the processing such as program table generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, etc. If it is configured so that it can be handled by consistent time management processing, a broadcast receiving apparatus having both a conventional MPEG2-TS digital broadcast reception function and an MMT digital broadcast reception function is configured. In these processes (program table generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, etc.), it is not necessary to design a processing algorithm separately, thereby reducing costs. can do.

  In addition, even a receiver that does not have a conventional MPEG2-TS digital broadcast reception function and has only an MMT digital broadcast reception function, program table generation processing, recording reservation and viewing reservation control, Even if the algorithm of copyright management processing such as temporary storage is not completely newly created, the algorithm of the function installed in the receiver of the conventional digital broadcasting system using the MPEG2-TS system can be diverted. It can be developed at a lower cost.

  Therefore, a configuration in which the time management function based on the “JST_time” parameter of the MH-TOT is used for these processes (program table generation process, recording reservation / viewing reservation control, copyright management process such as temporary storage). Thus, even an MMT digital broadcast broadcast receiving apparatus can be provided at a lower cost by improving the consistency with the conventional broadcast system.

  As described above, the broadcast receiving apparatus 100 according to the present embodiment includes a time management function using two types of time information with different accuracy. One time information is notation time information consistent with the conventional digital broadcasting system, and the other time information is time information with higher resolution than the one time information. By using it for synchronization processing of each content data, it realizes more advanced information presentation processing than the conventional broadcasting system, and the former time information can be used for program schedule generation processing, recording reservation and viewing reservation control, temporary storage By using it for the right management process etc., the broadcast receiving apparatus can be provided at low cost.

  Therefore, the broadcast receiving apparatus 100 of the present embodiment can achieve both higher-level information presentation processing and cost reduction by providing the two types of time management functions described above.

[First Modification of Time Management]
Next, a first modification of time management in the broadcasting system of the present embodiment will be described below.

  In the first modification, from the time management server (not shown) or the broadcast station server 300 to the broadcast receiving device 100 in order to increase the accuracy of the management time of the time management function based on NTP already described with reference to FIG. The information related to the estimated delay time in the time information transmission is transmitted by including in the broadcast signal, and the broadcast receiving apparatus 100 is configured to use the information related to the estimated delay time to correct the system clock of the time management function based on NTP. Also good.

  At this time, the information on the estimated delay time may be transmitted within the TMCC (Transmission and Multiplexing Configuration Control) area outside the TLV multiplexed stream, not within the TLV multiplexed stream shown in FIG. good. If the transmission is performed in the TMCC area, the broadcast receiving apparatus 100 can extract information on the estimated delay time without going through a TLV multiplexed stream separation process (demux process). That is, it is possible to acquire information that is not easily affected by the delay caused by the separation process in the broadcast receiving apparatus 100, and therefore it is possible to perform a highly accurate system clock correction process. An example of a data structure of time information transmitted by the TMCC signal will be described with reference to FIG. 13C. For example, the time information may be stored in the TMCC extended information area and transmitted. In the time information in the TMCC extended information area of FIG. 13C, the “delta” parameter is a 32-bit transmission delay value from the time management server that distributes the UTC or the server device that generates the TMCC signal to the general broadcast receiving device. It is expressed with a signed fixed point. The upper 16 bits describe the integer part and the lower 16 bits describe the decimal part. The “transmit_timestamp” parameter is a transmission time stamp, and describes the time when the TMCC signal is transmitted from the server device in the NTP time stamp length format. The upper 32 bits represent the integer part, and the lower 32 bits represent the decimal part.

  In the first modification, the broadcast receiving apparatus 100 according to the present embodiment includes information related to the assumed delay time described in the time information stored and transmitted in the TMCC extended information area (for example, the above-described “delta”). By using the parameter and / or “transmit_timestamp” parameter), the system clock of the time management function based on the NTP used for the synchronization processing of each content data of the broadcast signal can be corrected with higher accuracy.

[Second Modification of Time Management]
Next, a second modification of time management in the broadcasting system of the present embodiment will be described below.

  As described above, the broadcast receiving apparatus 100 according to the present embodiment has a time management function for managing the time by acquiring the current date and the Japan standard time based on information transmitted by MH-TOT. The current date and Japan standard time acquired by information transmitted by MH-TOT are superimposed on video information, application information, and the like by the video synthesizing unit 161 of the broadcast receiving apparatus 100, thereby being displayed on the monitor unit 162 and the video output unit 163. It can be output and provided to the user. As described above, the MH-TOT has the data structure shown in FIG. 11A, and the broadcast receiving apparatus 100 can acquire the current date and time from the “JST_time” parameter of the MH-TOT.

  However, since the above-mentioned “JST_time” parameter uses only the lower 16 bits of the encoded data of MJD, an overflow occurs with “April 22, 2038”, and the predetermined calculation is performed. The date after “April 23, 2038” alone cannot be expressed. Therefore, in the second modification of the present embodiment, the date after “April 23, 2038” is expressed by switching the calculation method between the case where the value of MJD is equal to or greater than the predetermined value and the case where it is less than the predetermined value. It shall be controlled as possible.

  FIG. 12 shows an example of the first calculation method used when the MJD value is greater than or equal to a predetermined value and the second calculation method used when the MJD value is less than the predetermined value. For example, when the predetermined value is “32768 (0x8000)”, when the MJD is “32768” or more, the current date is calculated using the first calculation method, and when the MJD is less than “32768”. Calculates the current date using the second calculation method. The case where MJD is less than “32768” is equivalent to the case where the most significant bit of 16-bit data of MJD is “0”. Thereby, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to represent dates after “April 23, 2038”. However, the predetermined value can be arbitrarily set, and the predetermined value may be set to “16384 (0x4000)”, “49152 (0xC000)”, or the like. The calculation method switching condition may be that the upper 2 bits of the 16-bit data of MJD are “00” and the upper 2 bits of the 16-bit data of MJD are not “11”. When the above-mentioned means is used with the predetermined value being “32768”, dates before “September 4, 1948” cannot be expressed, but there is no particular problem in practical use as a television receiver. .

  Further, instead of switching between the first calculation method and the second calculation method according to the comparison result between MJD and the predetermined value, the “reserved” parameter of the MH-TOT data structure shown in FIG. You may make it switch said 1st calculation method and said 2nd calculation method according to the flag which replaced a part or all, or the newly added flag. For example, when the most significant bit of MJD 16-bit encoded data is “0”, the flag is set to “1” if the MJD indicates “April 23, 2038” or later. If it does not indicate “April 23, 2038” or later, “0” may be set. When the flag is “1”, the second calculation method shown in FIG. 12 may be used, and when the flag is “0”, the first calculation method may be used. Alternatively, a descriptor having the same meaning as the flag may be newly prepared and placed in the MH-TOT.

  In the broadcasting system of the present embodiment, as described above, the NTP format absolute time is transmitted, and the broadcast receiving apparatus 100 of the present embodiment has a time management function based on the NTP. Furthermore, in the broadcast receiving apparatus 100 according to the present embodiment, the decoding timing and presentation for each presentation unit of the video / audio signal are referred to by referring to the NTP timestamps described in the MPU timestamp descriptor set for each MPU. The timing is controlled. As described above, the time information in the NTP format has the configuration shown in FIG. 13A. The MPU time stamp descriptor has the configuration shown in FIG. 13B.

  For this reason, in the broadcast receiving apparatus 100 according to the present embodiment, the “reference_timestamp” parameter, the “transmit_timestamp” parameter, the “mpu_presentation_time” parameter, or the like is referred to, and the first reference is made according to the value of the referenced time data or the like. Either one of the calculation methods and the second calculation method may be selected. That is, for example, when the most significant bit of the 64-bit time data in the NTP length format is “0”, the second calculation method is used, and when it is not “0”, the first calculation method is used. And so on.

  In any of the above methods, the broadcast receiving apparatus 100 according to the present embodiment can represent dates after “April 23, 2038”.

[Broadcast receiving device channel selection processing (initial scan)]
The AMT of the broadcasting system according to the present embodiment provides a list of multicast groups of IP packets for receiving IP packets transmitted by the TLV multiplexing method as distinctly as possible from IP packets transmitted through a communication line. Shall. It is possible to list a plurality of IP multicast groups in one service identification. In addition, an address mask can be used to efficiently describe successive IP addresses.

  In the broadcast receiving apparatus 100 according to the present embodiment, a list of services acquired from the TLV-NIT is stored in a nonvolatile memory such as the ROM 103 or the storage unit 110 at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change. And a list of IP multicast groups corresponding to the services can be stored in the nonvolatile memory in association with the services as IP related information. To do. By storing the list of services and IP-related information in a non-volatile memory so that they can be referred to at all times, there is no need to re-acquire TLV-NIT or AMT when switching channels, etc., and broadcast content can be acquired efficiently. Can be done.

  FIG. 14 is a diagram illustrating an example of an operation sequence at the time of channel scanning (rescanning) in the broadcast receiving apparatus 100 of the present embodiment.

  When the channel scan is started, the reception function execution unit 1102 sets an initial frequency value to the tuner / demodulation unit 131 and instructs the tuner / demodulation unit 131 to perform tuning to the frequency value (S101). When the tuner / demodulation unit 131 succeeds in locking to the set frequency value (S102: Yes), the reception function execution unit 1102 next acquires TLV-NIT from the received signal (S103).

  When the TLV-NIT acquired in the process of S103 is valid data (S104: Yes), the reception function execution unit 1102 acquires information such as a TLV stream ID and an original network ID from the acquired TLV-NIT. (S105). FIG. 15A shows an example of the data structure of TLV-NIT. The TLV stream ID information can be acquired from the “tlv_stream_id” parameter, and the original network ID information can be acquired from the “original_network_id” parameter. Furthermore, distribution system information regarding the physical conditions of the broadcast transmission path corresponding to each TLV stream ID / original network ID is acquired from the distribution system descriptor (S106), and a list of service IDs is acquired from the service list descriptor ( S107). FIG. 15B shows an example of the data structure of the satellite distribution system descriptor. FIG. 15C shows an example of the data structure of the service list descriptor. If the TLV-NIT has a plurality of different data such as a TLV stream ID, original network ID, distribution system information, and service ID list, the processes of S105 to S107 are repeated. Next, the reception function execution unit 1102 creates a service list based on data such as the TLV stream ID, original network ID, distribution system information, and service ID list acquired in the processes of S105 to S107. The service list is stored in the ROM 103 or the storage unit 110 (updated when rescanning) (S108).

  Next, the reception function execution unit 1102 acquires the AMT from the received signal (S109), and further acquires a list of IP multicast groups related to each service ID stored in the service list (S110). FIG. 15D shows an example of the data structure of AMT. If the AMT has a list of IP multicast groups related to a plurality of service IDs, the process of S110 is repeated. When there are a plurality of AMTs having a list of IP multicast groups related to different service IDs, the processes of S109 to S110 are repeated. Next, the reception function execution unit 1102 stores the IP multicast group list acquired in the process of S110 as IP related information in association with the service ID in the ROM 103 or the storage unit 110 (updated when rescanning). (S111).

  When the tuner / demodulation unit 131 has not succeeded in locking to the set frequency value in the process of S102 (S102: No), and the TLV-NIT acquired in the process of S103 is not valid data. In the case (S104: No), the processing of S105 to S111 is not performed.

  When the process of S111 is completed, the reception function execution unit 1102 ends the process if the frequency value set in the tuner / demodulation unit 131 is the final frequency value in the channel scan range (S112: Yes). On the other hand, if the set frequency value is not the final frequency value in the channel scan range (S112: No), the frequency value set in the tuner / demodulator 131 is increased (S113), and the processing of S102 to S111 is performed. repeat. In addition, when one TLV-NIT can acquire service IDs related to all the services constituting the broadcast network, and further can acquire an AMT having a list of IP multicast groups related to the service IDs, S112 to S113 No processing is required.

  Through the above-described series of processing, the broadcast receiving apparatus 100 according to the present embodiment is able to create a list of services (service list) that configure the broadcast network at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change. Simultaneously with the creation / update, a list of IP multicast groups (IP related information) corresponding to each service can be created / updated, and further stored in a non-volatile memory such as the ROM 103 or the storage unit 110.

  The rescan for changing the setting is automatically performed when it is detected that there is a change in the information in the table by referring to the “version_number” parameter of TLV-NIT or AMT. May be. When a change in the “version_number” parameter of one of TLV-NIT and AMT is detected, only the information related to the table in which the change in the parameter is detected may be automatically updated. However, when the automatic update described above is performed, it is desirable to notify the user that the rescan has been automatically performed. In addition, the user may be notified that information in the table has changed, and the user may be allowed to select whether or not to perform the rescan.

[Broadcast receiving device channel selection processing (channel switching)]
FIG. 16 is a diagram illustrating an example of an operation sequence at the time of channel selection (channel switching) in the broadcast receiving apparatus 100 according to the present embodiment.

  When the user operates a remote controller (not shown) to instruct channel switching, the reception function execution unit 1102 interprets the command transmitted from the remote controller and designates the service ID of the target service (S201). Next, reception function execution section 1102 starts acquiring AMT from the received signal of tuner / demodulation section 131. If acquisition of the AMT is successful within a predetermined time (S202: Yes), information on a list of IP multicast groups corresponding to the service ID is acquired from the acquired AMT (S204). On the other hand, if acquisition of the AMT is not successful within a predetermined time (S202: No), the IP corresponding to the service ID is referred to by referring to the IP related information stored in the ROM 103 or the storage unit 110 (S203). Information on the list of multicast groups is acquired (S204). Note that the IP-related information stored in the ROM 103 or the storage unit 110 may be always referred to without performing the determination process in S202.

  Next, the reception function execution unit 1102 starts acquiring TLV-NIT from the reception signal of the tuner / demodulation unit 131. When acquisition of TLV-NIT is successful within a predetermined time (S205: Yes), distribution system information for acquiring an IP data flow corresponding to the service ID is acquired from the acquired TLV-NIT (S207). On the other hand, when the acquisition of TLV-NIT is not successful within a predetermined time (S205: No), the service ID stored in the ROM 103 or the storage unit 110 is referred to (S206), thereby corresponding to the service ID. Distribution system information for acquiring an IP data flow is acquired (S207). Note that the service list stored in the ROM 103 or the storage unit 110 may always be referred to without performing the determination process of S205. When the distribution system information is acquired in the process of S207, the reception function execution unit 1102 next controls the tuner / demodulation unit 131 with the frequency value indicated by the acquired distribution system information, and the service ID (S208), an MMT data string is extracted from the received IP data flow and output to the separation unit 132.

  In the separation unit 132, the transport processing unit 1102a acquires an MMTP packet with a packet ID “0” from the input MMT data string (S209), and further acquires an MPT included in the acquired MMTP packet. (S210). Next, the transport processing unit 1102a refers to the “MMT_package_id_byte” parameter of the acquired MPT, and confirms whether the lower 16 bits of the “MMT_package_id_byte” parameter have the same value as the service ID. In the example of the MPT data structure shown in FIG. 17, when the lower 16 bits of the “MMT_package_id_byte” parameter have the same value as the service ID (S211: Yes), the MMTP packet with the packet ID “0” It is determined that the packet is an MMTP packet having program data corresponding to the service ID, and acquisition of MFU is executed based on the information of the acquired MPT (S216).

  On the other hand, if the lower 16 bits of the “MMT_package_id_byte” parameter are not the same value as the service ID (S211: No), the MMTP packet whose packet ID is “0” has the program data corresponding to the service ID. Judge that it is not a packet. In this case, the transport processing unit 1102a acquires the PLT again (S212), and checks the acquired PLT, thereby checking the packet ID of the MMTP packet that transmits the MPT having the “MMT_package_id_byte” parameter corresponding to the service ID. (X is assumed) is confirmed (S213). Further, the transport processing unit 1102a acquires an MMTP packet whose packet ID is “x” from the input MMT data string (S214), and acquires the MPT included in the acquired MMTP packet (S215). Furthermore, MFU is acquired based on the information of the acquired MPT (S216).

  Note that the processing of S212 to S215 may always be performed without performing the processing of S209 to S211. In this case, when the program data corresponding to the service ID is stored in the MMTP packet other than the packet ID “0”, the processing time can be shortened.

  When acquiring the MFU in the process of S216, the transport processing unit 1102a extracts encoded video data, encoded audio data, and the like from the acquired MFU, and outputs them to the video decoder 141, the audio decoder 143, and the like. In the following, video / audio decoding processing based on the control of the AV decoding processing unit 1102b and presentation processing based on the control of the presentation processing unit 1102h are performed. However, since each processing is known, detailed description thereof is omitted.

  Through the series of processes described above, the broadcast receiving apparatus 100 according to the present embodiment can execute a channel selection (channel switching) operation. In particular, as described with reference to FIGS. 14 and 16, a service list and IP related information are created at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change, and the ROM 103 and storage unit 110, which is stored in a non-volatile memory such as 110, and can always be referred to, and at the time of channel selection (channel switching), by referring to the service list and IP related information stored in the non-volatile memory such as the ROM 103 and the storage unit 110, This makes it possible to improve the efficiency of operation during channel selection (channel switching). That is, it is possible to shorten the time from the start of channel selection (channel switching) to the end of channel selection (channel switching), compared to the case where AMT and TLV-NIT are reacquired during channel selection (channel switching). Become.

[Screen layout control of broadcast receiver]
In the broadcast receiving apparatus 100 of the present embodiment, it is assumed that screen layout control based on the description of LCT is possible. FIG. 18 shows an example of the data structure of LCT.

  In particular, in the figure, the “left_top_pos_x” parameter and the “right_down_pos_x” parameter indicate the horizontal position at the upper left and the lower right when the left side of the full screen display is “0” / the right side is “100”. Each is shown as a ratio to the total number of pixels in the horizontal direction. The “left_top_pos_y” parameter and the “right_down_pos_y” parameter indicate the vertical position at the upper left and the lower right of the area when the upper side of the full screen display is “0” / lower side is “100”. It shall be shown by the ratio with respect to the total number of pixels. The “layer_order” parameter indicates the relative position in the depth direction of the region.

  Examples of layout allocation to layout numbers based on the settings of the parameters are shown in FIGS. 19A to 19D together with the setting values of the parameters.

  FIG. 19A is a default layout setting of the broadcast receiving apparatus 100 of the present embodiment, and is an example in which only one area is set on the entire screen. FIG. 19B shows an example in which the entire screen is divided into three areas, and the areas are “area 0”, “area 1”, and “area 2”. For example, when the number of pixels on the whole screen is 7680 horizontal / vertical 4320 pixels, “area 0” has “left_top_pos_x” parameter of “0”, “left_top_pos_y” parameter of “0”, and “right_down_pos_x” parameter of “80” ”,“ Right_down_pos_y ”parameter is“ 80 ”, and is set in the range of (0, 0) − (6143, 3455). Similarly, “area 1” is set in the range of (6144,0) − (7679,4319), and “area 2” is set in the range of (0,3456) − (6143,4319).

  FIG. 19C is an example in which three areas are set as in FIG. 19B, but “area 0” is set to a range of (0,0) − (7679,4319), and “area 1” and “area” “2” is in the same range as described above, and is arranged in front of “area 0” according to the setting of the “layer_order” parameter. FIG. 19D shows that “area 0” is set for device 0 (default device: broadcast receiving apparatus 100 in this embodiment), and “area 1” is set for device 1 (portable information terminal 700 in this embodiment). This is an example of the case.

  As described above, in the broadcasting system of the present embodiment, by using LCT, it is possible to perform screen layout control for displaying a multimedia service on the receiver as intended by the service provider.

  Note that fractions after the decimal point generated when the screen is divided according to the set value of the parameter such as “left_top_pos_x” may be rounded up or down. Rounding off (or rounding to zero in a binary number) may be used. For example, the number of pixels of the entire screen is 7680 pixels / vertical 4320 pixels, the “left_top_pos_x” parameter of “area 0” is “0”, the “left_top_pos_y” parameter is “0”, the “right_down_pos_x” parameter is “51”, “right_down_pos_y_ When the parameter is “51”, “Region 0” may be set in the range of (0, 0) − (3916, 2203) by rounding up processing, or (0, 0) − (3915, 2202) may be set to “area 0”. Further, rounding up / down processing in units of 8 pixels or 16 pixels may be performed in consideration of a macroblock in video compression processing. By the processing, it is possible to efficiently perform region setting based on LCT and resolution conversion processing of multimedia content in the region.

[Exceptional processing for screen layout control of broadcast receivers]
In the broadcast receiving apparatus 100 of the present embodiment, even when the area control of the screen layout is performed by the above-described LCT, when the display of the EPG screen is instructed by the user, as an exception process, It is possible to perform screen layout control ignoring the description content of the LCT. FIG. 20A shows an example of the operation of exception processing for screen layout control based on LCT.

  The screen layout control similar to that of FIG. 19B is performed by the description of LCT, the broadcast program video is displayed in “Area 0”, and the program linkage data linked to the broadcast program is broadcasted in “Area 1” and “Area 2”. When the user instructs display of the EPG screen with a remote controller (not shown) while the content is displayed, the broadcast receiving apparatus 100 according to the present embodiment describes the LCT description as shown in FIG. 20A (A). Regardless of the contents, the screen layout setting is returned to the default setting (that is, the state in which the screen layout control similar to FIG. 19A is performed), and the EPG screen is controlled to be displayed on the entire screen. Further, when the user instructs the display end of the EPG screen, the screen layout control according to the description content of the LCT is re-executed.

  By performing the above-described control, the EPG screen can be displayed larger than the case where the EPG screen is displayed while maintaining the area control of the screen layout as shown in FIG. 20A (B). It is possible to improve visibility.

  The exception process of the screen layout control is not applied only when the EPG screen is displayed. As shown in FIG. 20B, various setting screens of the broadcast receiving apparatus 100 (recording setting screen in the illustrated example). ) May be applied when a sub-screen is displayed or when a two-screen is displayed.

  In the case of the recording setting screen shown in FIG. 5A, the broadcast content display area is changed from the entire screen to only the sub-screen portion at the lower right of the screen. Similarly, in the case of the two-screen display shown in FIG. 5B, the broadcast content display area is changed from the entire screen to only the divided screen portion on the left side of the middle stage of the screen. In any case, the display area for displaying the broadcast content is narrower than the case where the entire screen is used. Therefore, the area control of the screen layout is maintained in the display area (that is, the area division is performed). It is not preferable from the viewpoint of visual recognition that a plurality of broadcast contents are displayed at the same time. Therefore, in the broadcast receiving apparatus 100 according to the present embodiment, in the above situation, only the broadcast content of “area 0” is selected and displayed in the display area. Note that the broadcast content of “region 1” or “region 2” may be selected and displayed according to the immediately preceding region selection situation.

  By performing the above-described control, it is possible to improve the visibility of the broadcast content as compared with the case where various broadcast content is displayed while maintaining the area control of the screen layout. The same applies to the sub-screen display on the recorded program list screen and the browser display of Internet content.

[EPG display of broadcast receiver]
In the broadcasting system of the present embodiment, it is assumed that time-series information regarding events (so-called programs) included in each service constituting the broadcasting network is transmitted by MH-EIT. FIG. 21 shows an example of the data structure of the MH-EIT according to the present embodiment. The MH-EIT is identified by the table ID (corresponding to the “talbe_id” parameter in the figure) into two classes, and indicates the current / next event information of the own TLV stream and the schedule information of each event of the own TLV stream. Is possible. The broadcast receiving apparatus 100 according to the present embodiment performs identification by service ID (corresponding to the “service_id” parameter in the figure) with reference to the MH-EIT or the like, thereby providing information such as the start time and broadcast time of each event. The EPG screen can be created by acquiring the EPG, and the created EPG can be displayed on the monitor unit 162 by superimposing the created EPG on the video information or the like by the video composition unit 161.

  FIG. 22A is a diagram illustrating an example of an EPG screen in the broadcast receiving apparatus 100 of the present embodiment. The EPG screen 162a has a matrix shape with the vertical axis representing time and the horizontal axis representing service ID (channel), and displays detailed information of broadcast programs broadcast on each channel in each time slot. The detailed information 162a1 of each broadcast program is mainly composed of a title area 162a2 and a detailed description area 162a3.

  The title area 162a2 displays a program title of the broadcast program, a symbol representing the attribute of the broadcast program, and the like. The symbol or the like indicating the attribute of the broadcast program is, for example, a symbol / character indicating a new program, a symbol / character indicating a re-broadcast program, or the like. Alternatively, it may be a mark or the like that symbolizes “data” meaning that it corresponds to data broadcasting by a broadcasting service. Moreover, the mark 162a4 etc. which symbolized "NetWork" which means that the content, application, etc. relevant to the said broadcast program are acquirable from a network may be sufficient. Further, by distinguishing the background color of the detailed information 162a1 from others, or by surrounding the display area of the detailed information 162a1 with a thick frame, symbols or the like representing the attributes of the broadcast program may be substituted.

  This is a case where each control information (message, table, descriptor, etc.) in the broadcasting system of the present embodiment indicates that content, application, etc. related to the broadcast program can be acquired from the network. However, if the LAN communication unit 121 of the broadcast receiving apparatus 100 is not connected to the LAN communication unit 121 and cannot access each server apparatus on the network, the mark 162a4 symbolized “NetWork” is used. Etc. may be controlled so as not to be displayed.

  In addition, the broadcast program is a distribution program distributed via the Internet 200 and cannot be obtained only from the broadcast wave. Further, as described above, the broadcast receiving device 100 is connected to each server device on the network. For example, when it is in a state in which the user cannot access, detailed information 162b1 displayed on the EPG screen 162b may be grayed out as shown in FIG. 22B. That is, control is performed so as not to display the detailed information of the distribution program that cannot be viewed. Further, the background color of the detailed information 162b1 may be differentiated from the others to replace the grayout process. When the detailed information 162b1 is selected by operating a remote controller (not shown), the broadcast receiving apparatus 100 is in a state where it cannot access each server apparatus on the network, or the distribution program associated with the detailed information 162b1 is viewed. You may make it alert | report to a user by a popup etc. that it cannot do.

  Through the above-described controls, the broadcast receiving apparatus 100 can provide program information of each broadcast program in a format that is less uncomfortable to the user according to the network connection status.

  FIG. 22C is a diagram illustrating another example of the EPG screen in the broadcast receiving apparatus 100 according to the present embodiment. In the figure, “M1 TV”, “M2 Broadcast”, “M3 Channel”, “M4TV”, “TV M5”, etc. are broadcast station names of each channel. It is assumed that a broadcast program to be distributed and a distribution program distributed via the Internet 200 (frame information 162c1 indicated by “net broadcast” in the figure) are provided simultaneously.

  As shown in the figure, when there is a channel having only a distribution program distributed via the Internet 200, all channels (including information 162c1) are normally displayed as shown in the EPG screen 162c of FIG. Control to display the information. On the other hand, when the broadcast receiving device 100 cannot access each server device on the network, as shown in the EPG screen 162d of FIG. Control may be performed so as not to display the channel information (information 162c1 in FIG. 1A) of “M2 broadcast (net broadcast)”.

  With the above-described controls, the user of the broadcast receiving apparatus 100 can make it unnecessary to confirm information on channels that cannot be viewed by the user.

[Emergency warning broadcast display of broadcast receiver]
The broadcast receiving apparatus 100 according to the present embodiment performs emergency alert broadcast reception processing when the emergency alert broadcast activation control signal bit of the TMCC signal included in the transmission data including the TLV stream changes from “0” to “1”. It shall be possible to do.

  The emergency alert broadcast may be provided as a full-screen display application, or may be provided as character information at a character supermarket. When the emergency alert broadcast is provided as text information at the text superimpose, it is preferable to display the text information of the text supermarket regardless of the state of the broadcast receiving apparatus 100 immediately before receiving the emergency alert broadcast. That is, as shown in FIG. 23, when a user views a normal broadcast program and receives an emergency warning broadcast in a state where the program screen 162e of the broadcast program is displayed on the monitor unit 162, the emergency warning broadcast The character information 162e1 is displayed superimposed on the program screen 162e. Similarly, when the user gives an instruction to display the EPG screen and the emergency warning broadcast is received while the EPG screen 162f is displayed on the monitor unit 162, the character information 162f1 by the emergency warning broadcast is superimposed on the EPG screen 162f. Control to display.

  By the above-described control, in the broadcast receiving apparatus 100 of the present embodiment, even when the user selects and displays an EPG screen, various setting screens, a recorded program list screen, an Internet browser, etc., an emergency warning broadcast Is received, it is possible to avoid overlooking important text information based on the emergency alert broadcast. Note that this control may be performed on character information of a normal character supermarket that is not based on emergency alert broadcasting.

[Various exception handling]
When the broadcast receiving apparatus 100 according to the present embodiment cannot acquire data outside the TLV stream in the same package, for example, the following exception processing may be performed.

  As described with reference to FIG. 6E, in the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment, the location information stored in the MPT (corresponding to “MMT_general_location_info ()” in FIG. 17) Data to be acquired and data to be acquired through a route other than the TLV stream can be included in the same package. However, the data transmission path (for example, IPv4 data flow, IPv6 data flow, broadcast MPEG2-TS, etc.) other than the TLV stream indicated by the location information is a reception function different from the reception function of the TLV / MMT stream. Therefore, even when the broadcast receiving apparatus 100 is operating, the situation where the reception function of these transmission paths is not operating, the situation where the receiving function itself is operating but the relay apparatus is not operating, There may be situations in which data cannot be acquired from these transmission paths, such as a situation where the transmission path is not wired or wirelessly connected, or a situation where the broadcast receiving apparatus 100 is installed in an environment where these transmission paths cannot be connected in the first place. .

  Under such circumstances, the location information stored in the MPT indicates an event indicating that data acquired in the TLV stream and data acquired through a route other than the TLV stream are associated with each other so as to be included in the same package. When received, the broadcast receiving apparatus 100 according to the present embodiment may perform the following operation, for example.

  For example, as shown in FIGS. 19B and 19C, the LCT sets a plurality of areas in the screen, displays the video included in the TLV stream in “area 0”, and displays “area 1” and “area 2”. ”Is associated with the data acquired through the transmission path other than the TLV stream so that the data of the transmission path other than the TLV stream to be displayed in“ area 1 ”or“ area 2 ”is displayed. If it cannot be obtained, layout display of a plurality of areas designated by the LCT may be prohibited. Specifically, even when the LCT is received, the video of the content received in the TLV stream is displayed in “area 0” of the default layout display shown in FIG. 19A, as shown in FIGS. 19B and 19C. What is necessary is not to shift to a layout display of a plurality of areas. Further, in this state, even if an instruction to change from the default layout to the layout indicated by the LCT is input to the operation input unit 170 of FIG. 7A, the default layout display shown in FIG. The display may not be shifted to the multiple area layout display as shown in FIG. 19B or 19C.

  As shown in FIG. 19B and FIG. 19C, the LCT sets a plurality of areas in the screen, displays the video included in the TLV stream in “Area 0”, and displays in “Area 1” and “Area 2”. In this case, the data acquired on the transmission path other than the TLV stream is associated with the display so that the data on the transmission path other than the TLV stream to be displayed in “area 1” or “area 2” cannot be acquired. As another example of the operation, a display frame of a plurality of areas shown in FIGS. 19B and 19C indicated by the LCT is temporarily displayed, and a background color or a predetermined still image is displayed for “area 1” and “area 2”. If data of a transmission path other than the TLV stream indicated by the MPT location information cannot be acquired even after a predetermined time has elapsed, display switching is performed to return to the default layout display state shown in FIG. 19A. And it may be. In this case, even when the layout of FIGS. 19A, 19B, and 19C is changed, if the program video included in the TLV stream is continuously displayed in “area 0”, the user program video itself Is preferable because it continues.

  In addition, since the data of the transmission path other than the TLV stream to be displayed in “area 1” or “area 2” cannot be acquired, the content received in the TLV stream in “area 0” of the default layout display illustrated in FIG. 19A. The operation of various communication functions and various reception functions of the broadcast receiving apparatus 100 according to the present embodiment is started, and the communication environment, communication status, and various reception functions of the various communication functions are started. Due to the change in the reception environment and the reception situation, there may be a situation in which data of a transmission path other than the TLV stream to be displayed in “area 1” or “area 2” can be acquired. In this case, the broadcast receiving apparatus 100 according to the present embodiment immediately switches from the default layout display shown in FIG. 19A to the layout of a plurality of areas as shown in FIGS. 19B and 19C indicated by the LCT, and changes the TLV to “area 0”. The video of the content received in the stream may be displayed, and switching may be performed so that data acquired from a transmission path other than the TLV stream is displayed in “area 1” or “area 2”. Further, the layout change may be executed after an instruction to change from the default layout to the layout indicated by the LCT is input from the operation input unit 170 without performing the layout change immediately.

[Copyright protection function]
In the digital broadcasting system supported by the broadcast receiving apparatus 100 of this embodiment, by transmitting the MPT including the copy control information, for example, “unlimited copy is possible” (“unlimited copy is possible and storage is possible”). And "Encryption required at output" and "Unlimited copy available and no encryption required during storage and output"), "Only one generation can be copied", and "Multiple times can be copied" ( For example, the copy control state of the content referred to by the MPT, such as “dubbing 10”), “copy prohibited”, or the like may be transmitted. In this case, the broadcast receiving apparatus 100 according to the present embodiment stores the content in the storage (storage) unit 110, records it on a removable recording medium, outputs it to an external device, and outputs it to the external device according to the copy control information. Copying, moving processing to an external device, and the like may be controlled. The target of the accumulation process may include not only the storage (accumulation) unit 110 inside the broadcast receiving apparatus 100 but also a record that has been subjected to a protection process such as an encryption process so that it can be reproduced only by the broadcast receiving apparatus 100. . Specifically, the storage processing target includes an external recording device and the like that can be recorded and reproduced only by the broadcast receiving device 100.

  A specific example of processing based on the copy control information will be described below.

  First, when the copy control information included in the MPT indicates “unlimited copying is possible”, the broadcast receiving apparatus 100 according to the present embodiment stores data in the storage (storage) unit 110, records on a removable recording medium, and external devices. You can output to, copy to an external device, and move to an external device without restriction. However, if "Unlimited copy is possible and encryption is required for storage and output" and "Unlimited copy is possible and encryption is not required for storage and output" are separated, "Unlimited copy is possible and storage and output is required" When "encryption processing is sometimes required", storage in the storage unit 110, recording on a removable recording medium, output to an external device, copying to an external device, and movement processing to an external device are limited to the number of times However, it is necessary to perform encryption processing.

  In addition, when the copy control information included in the MPT indicates “copying is possible for only one generation”, the broadcast receiving apparatus 100 according to the present embodiment enables the storage (storage) unit 110 to store the encrypted data. When the stored content is output to an external device for viewing, the content is encrypted and output together with “copy prohibited” copy control information. However, a so-called move process to an external device (a process of copying content to the external device and making the content in the storage (storage) unit 110 of the broadcast receiving apparatus 100 unplayable by an erasure process or the like) is possible.

  In addition, when the copy control information included in the MPT indicates “copying is allowed a predetermined number of times”, the broadcast receiving apparatus 100 according to the present embodiment can be encrypted and stored in the storage (storage) unit 110. When the stored content is output to an external device for viewing, the content is encrypted and output together with “copy prohibited” copy control information. However, a predetermined number of copying and moving processes may be performed on the external device. In the case of so-called “dubbing 10”, nine copies and one move process may be performed on the external device.

  When the copy control information included in the MPT indicates “copy prohibited”, the broadcast receiving apparatus 100 of this embodiment prohibits copying to the storage (accumulation) unit 110. However, the broadcast receiving apparatus 100 stores the storage (accumulation) unit 110 only for a predetermined time determined in advance or for a predetermined time specified by control information included in the broadcast signal (for example, by the MH-Expire descriptor shown in FIG. 6D). In the case of having a “temporary storage” mode that enables the storage (storage) to be stored in the storage (storage) unit 110 even if the copy control information included in the MPT indicates “copy prohibited”. The content can be temporarily stored. When the content whose copy control information included in the MPT is “copy prohibited” is output for viewing on an external device, the content is encrypted and output together with the copy control information “copy prohibited”.

  Note that viewing output to the above-described external device may be performed via the video output unit 163 and the audio output unit 166 of FIG. The copying or moving process to the external device described above may be performed via the digital I / F unit 125, the LAN communication unit 121, etc. in FIG. 7A.

  According to the processing described above, appropriate content protection can be realized according to the copy control information associated with the content.

  In addition, the copy control information is a copy process to an external device via the LAN communication unit 121 that indicates copy restrictions such as “copying is possible for only one generation”, “copying is allowed a predetermined number of times”, “copy prohibited”, etc. Is possible only when the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 is in the same subnet as the IP address of the broadcast receiving device 100, and the IP address of the external device is If it is outside the same subnet as 100 IP addresses, it may be prohibited. Content whose copy control information is “unlimited copy is possible and encryption processing is required during storage and output” may be handled in the same manner.

  Similarly, once the copy control information indicates a copy restriction such as “copying is possible for only one generation”, “copying is allowed a predetermined number of times”, and “unlimited copying is possible and encryption processing is required during storage and output” once. In the process of storing in the storage (storage) unit 110 and then moving to the external device via the LAN communication unit 121, the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 is the broadcast receiving device 100. If the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100, it may be prohibited.

  In principle, the viewing video output and audio output of the content stored in the storage (storage) unit 110 of the broadcast receiving apparatus 100 are received by the IP address of the external device that is the destination of the transmission packet from the broadcast receiving apparatus 100. This is possible only when the IP address of the apparatus 100 is in the same subnet, and is prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100. However, registration processing as a device in which the external device is connected within the same subnet as the IP address of the broadcast receiving device 100 within a predetermined period and can be viewed outside the same subnet as the IP address of the broadcast receiving device 100 In the case of a device that has been paired, even if the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100, storage (accumulation) of the broadcast receiving device 100 to the external device The content stored in the unit 110 may be configured to enable viewing video output and audio output. In this case, the viewing video output and audio output are performed by encrypting the content.

  According to the processing described above, user convenience and content protection are compatible by performing different processing depending on whether the external device is in the same subnet or outside the same subnet as the IP address of the broadcast receiving apparatus 100. Can be realized.

  Next, as described with reference to FIG. 6E, in the digital broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment, the location information in the MPT (“MMT_general_location_info ()” in FIG. 17) Data acquired through a different route (IPv4, IPv6, MPEG2-TS, URL, etc.) from the acquired data may also be included in the same package and the same event as the data acquired by the TLV stream, but at this time, it is copied to the MPT. Content protection in the case where control information is included will be described.

  First, when copy control information is included in MPT, the data included in the same package and the same event in the location information is different from the data acquired by the TLV stream of the broadcast route (IPv4, IPv6, MPEG2-TS, URL, etc. The data acquired in (1) may be controlled according to the copy control information included in the TLV stream. As described above, the copy control status of the specified content based on these copy control information is “Unlimited copy allowed” (“Unlimited copy allowed and encryption required during storage and output”) and “Unlimited copy allowed” In addition, it may be divided into two types, “no encryption processing is required at the time of storage and output”), “copying is possible for only one generation”, “copying for a predetermined number of times” (for example, copying is possible 9 times + movement is allowed once) “Dubbing 10”), “copy prohibited”, etc. can be specified.

  Here, when the data position indicated by the location information includes MPEG2-TS data transmitted by another digital broadcast signal, the MPEG2-TS data is associated with the copy control information even in the other digital broadcast signal. Being broadcast. Then, according to which information the copy control of the MPEG2-TS data is performed (whether it follows the copy control information included in the TLV / MMT stream or the copy control information included in the MPEG2-TS) becomes a problem. .

  In the digital broadcasting system of the present embodiment, as a solution to this problem, the broadcast receiving apparatus 100 may perform any one of the following solutions.

<Operation example 1>
In the first operation example, when the MPT includes copy control information and the data included in the same package and the same event as the location information includes MPEG2-TS data transmitted by another digital broadcast signal, the MPEG2-TS The copy control state indicated by the copy control information included in the TLV stream is controlled with priority over the copy control state indicated by the copy control information included in the TS.

  For example, the copy control status indicated by the copy control information included in the TLV stream is “one generation copy is permitted”, and the copy control status indicated by the copy control information included in the MPEG2-TS is “predetermined multiple times of copying”. If there is, even if it is data acquired by a different route (MPEG2-TS transmission format digital broadcasting) from the data acquired by the TLV stream, the copy control may be performed as the content of “one generation copy is possible”. For example, the copy control state indicated by the copy control information included in the TLV stream is “unlimited copying is allowed”, and the copy control state indicated by the copy control information included in the MPEG2-TS is “predetermined to allow multiple times of copying”. If there is, even if the data is acquired through a different route (MPEG2-TS transmission format digital broadcasting) from the data acquired by the TLV stream, the copy control may be performed as the content of “unlimited copying”.

  In the case of this operation, the data acquired through a route other than the TLV stream can be set to a copy state that the broadcast receiving apparatus 100 of this embodiment wants to manage in the corresponding broadcasting system.

<Operation example 2>
In the second operation example, when the MPT includes copy control information, and the data included in the same package and the same event as the location information includes MPEG2-TS data transmitted by another digital broadcast signal, the TLV stream is included. The copy control state indicated by the copy control information included in MPEG2-TS is compared with the copy control state indicated by the copy control information included in MPEG2-TS. Is stricter than the copy control state indicated by the copy control information included in the TLV stream, the storage process to the storage (storage) unit 110, the recording process to the removable recording medium, or the output process from the digital interface is performed. When processing the MPEG2-TS data, It operates to exclude from the content.

  In the case of this operation, for data acquired through a route other than the TLV stream, copying on the broadcast receiving apparatus 100 of this embodiment is performed while respecting the original copy control information set in the broadcast system that transmits the data. Duplicate control states can be eliminated.

  Further, as a result of the comparison, when the copy control state indicated by the copy control information included in the MPEG2-TS is the same as the copy control state indicated by the copy control information included in the TLV stream or a looser copy control state For the MPEG2-TS data included in the same package and the same event in the location information, copy control may be performed as content in the copy control state indicated by the copy control information included in the TLV stream.

  In the case of this operation, for data acquired through a route other than the TLV stream, copying on the broadcast receiving apparatus 100 of this embodiment is performed while respecting the original copy control information set in the broadcast system that transmits the data. Duplicate control states can be eliminated.

  In the above description, the copyright protection function of the broadcast receiving apparatus 100 of the present embodiment has been described as being performed based on the copy control information included in the MPT. However, the table for arranging copy control information is not limited to MPT. In addition to MPT, the MH-service description table (MH-SDT), MH-event information table (MH-EIT) described in FIG. You may perform a copyright protection process.

According to the present embodiment described above, a broadcast receiver compatible with MMT digital broadcasting can be provided.
(Example 2)

  Hereinafter, Example 2 of the present invention will be described. Note that the configuration, processing, effects, and the like in this embodiment are the same as those in the first embodiment unless otherwise specified. For this reason, below, the difference between a present Example and Example 1 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible. In the following description, the broadcast receiving apparatus of the present embodiment is a television receiver that supports both the MMT system and the MPEG2-TS system as the media transport system.

[Hardware configuration of broadcast receiver]
FIG. 24 is a block diagram illustrating an example of an internal configuration of the broadcast receiving apparatus 800. The broadcast receiving apparatus 800 includes a main control unit 801, a system bus 802, a ROM 803, a RAM 804, a storage unit 810, a LAN communication unit 821, an expansion interface unit 824, a digital interface unit 825, a first tuner / demodulation unit 831, a second tuner / Demodulator 832, MMT decode processor 841, MPEG2-TS decode processor 842, video synthesizer 861, monitor 862, video output 863, audio synthesizer 864, speaker 865, audio output 866, operation input 870 , Composed of.

  Main control unit 801, system bus 802, ROM 803, RAM 804, storage unit 810, expansion interface unit 824, digital interface unit 825, monitor unit 862, video output unit 863, speaker unit 865, audio output unit 866, operation input unit 870, Are the main control unit 101, system bus 102, ROM 103, RAM 104, storage (storage) unit 110, expansion interface unit 124, digital interface unit 125, monitor unit 162, video output unit 163 in the broadcast receiving apparatus 100 of the first embodiment. The speaker unit 165, the audio output unit 166, the operation input unit 170, and the like have the same functions, and detailed description thereof is omitted.

  The first tuner / demodulator 831 receives a broadcast wave of a broadcast service that employs MMT as a media transport method via an antenna (not shown), and a service desired by the user based on the control of the main controller 801. (Tune to) the selected channel. Further, the first tuner / demodulator 831 demodulates the received broadcast signal to acquire an MMT data string, and outputs it to the MMT decode processor 841. The second tuner / demodulation unit 832 receives a broadcast wave of a broadcast service that employs MPEG2-TS as a media transport method via an antenna (not shown), and receives a user's request based on the control of the main control unit 801. Tune in (tune to) the channel of the service you want to use. Further, the second tuner / demodulation unit 832 demodulates the received broadcast signal to acquire an MPEG2-TS data string, and outputs it to the MPEG2-TS decode processing unit 842.

  The MMT decoding processing unit 841 receives the MMT data sequence output from the first tuner / demodulation unit 831 and, based on the control signal included in the MMT data sequence, a video data sequence, an audio data sequence, which are real-time presentation elements, Separation processing, decoding processing, and the like of the character super data sequence and the caption data sequence are performed. The MMT decoding processing unit 841 includes a separation unit 132, a video decoder 141, a video color gamut conversion unit 142, an audio decoder 143, a character super decoder 144, a subtitle decoder 145, a subtitle synthesis unit 146, in the broadcast receiving apparatus 100 according to the first embodiment. It is assumed that functions equivalent to a caption color gamut conversion unit 147, a data decoder 151, a cache unit 152, an application control unit 153, a browser unit 154, an application color gamut conversion unit 155, a sound source unit 156, and the like are provided. The MMT decoding processing unit 841 can perform various processes described in the first embodiment. The details of the various processes are the same as those described in the first embodiment, and a description thereof will be omitted.

  The MPEG2-TS decoding processing unit 842 receives the MPEG2-TS data sequence output from the second tuner / demodulation unit 832 and, based on the control signal included in the MPEG2-TS data sequence, video data that is a real-time presentation element Separation processing, decoding processing, and the like of columns, audio data sequences, character super data sequences, subtitle data sequences, and the like are performed. The MPEG2-TS decoding processing unit 842 has a function equivalent to an IRD (Integrated Receiver Decoder) unit of a conventional television receiver that receives broadcast waves of a broadcasting service that employs MPEG2-TS as a media transport system. Detailed description is omitted.

  The video composition unit 861 inputs the video information, subtitle information, and application information output from the MMT decode processing unit 841, and the video information, subtitle information, and application information output from the MPEG2-TS decode processing unit 842. Processing such as selection and / or superimposition is performed as appropriate. The video composition unit 861 includes a video RAM (not shown), and the monitor unit 862 and the like are driven based on video information and the like input to the video RAM. In addition, the video composition unit 861 performs scaling processing, EPG screen information superimposition processing, and the like as necessary based on the control of the main control unit 801. The voice synthesis unit 164 receives the voice information output from the MMT decoding processing unit 841 and the voice information output from the MPEG2-TS decoding processing unit 842, and performs processing such as selection and / or mixing as appropriate.

  The LAN communication unit 821 is connected to the Internet 200 via the router device 200r, and transmits / receives data to / from each server device and other communication devices on the Internet 200. Also, an MMT data string (or part thereof) or an MPEG2-TS data string (or part thereof) of a program transmitted via a communication line is acquired, and an MMT decoding processing unit 841 or MPEG2-TS is appropriately selected. The data is output to the decoding processing unit 842.

[Time display of broadcast receiver]
In the broadcast receiving apparatus 800 of the present embodiment, the current date and the current time can be displayed on the EPG screen and various setting screens. The information on the current date and current time is transmitted by MH-TOT or the like in a broadcast service that employs MMT as a media transport system, and MPEG-TS in a broadcast service that employs MPEG2-TS as a media transport system. 2 is transmitted by TOT (Time Offset Table) or the like provided in SI (Service Information) defined in the system. The broadcast receiving apparatus 800 can acquire information on the current date and the current time by referring to the MH-TOT and the TOT.

  In general, when the video composition unit 861 mainly selects the video information output from the MMT decoding processing unit 841, the information on the current date and the current time acquired from the MH-TOT is displayed. When the video composition unit 861 mainly selects the video information and the like output from the MPEG2-TS decoding processing unit 842, the information related to the current date and the current time acquired from the TOT is superimposed on the video information and the like. What is necessary is just to control so that it may superimpose on image | video information etc.

  However, there is a difference in encoding processing / decoding processing, transmission path, etc. between a broadcasting service that employs MMT as a media transport method and a broadcasting service that employs MPEG2-TS as a media transport method. However, there is a possibility of inconsistency between the selection of a broadcast service that employs MMT as the media transport method and the selection of a broadcast service that employs MPEG2-TS as the media transport method. For example, as shown in FIG. 25, an EPG displaying channel information of a broadcast service adopting MPEG2-TS as a media transport method from an EPG screen 162g displaying channel information of a broadcast service adopting MMT as a media transport method. When the screen display is switched to the screen 162h, there is a possibility of causing the user to feel a visual discomfort due to inconsistency due to switching of the current time display from the current time display 162g1 to the current time display 162h1.

  In the broadcast receiving apparatus 800 according to the present embodiment, even when the video composition unit 861 mainly selects video information output from the MMT decoding processing unit 841 in order to prevent the user from having a visual discomfort. , Control is performed so that information relating to the current date and the current time acquired from the TOT is superimposed on the video information and the like. That is, control is performed so as to superimpose the current time information provided by the broadcast service adopting MPEG2-TS as the media transport method on the content of the broadcast service adopting MMT as the media transport method.

  By performing the control, the broadcast receiving apparatus 800 of the present embodiment always displays the current time information acquired by referring to the TOT when displaying the current time. Therefore, even when switching between a broadcast service that employs MMT as the media transport method and a broadcast service that employs MPEG2-TS as the media transport method, the user feels a visual discomfort due to inconsistent display of the current time. Can be prevented.

  FIG. 26A shows an example of selection control of the current time information reference source according to the reception status of each broadcast service in the broadcast receiving apparatus 800 of the present embodiment. In the broadcast receiving apparatus 800 of the present embodiment, when the broadcast service adopting MPEG2-TS as a media transport system is in a state capable of being received, the current time information is always obtained by referring to the TOT. The MH-TOT can be used only when the broadcast service using MPEG2-TS as a media transport system cannot be received and the broadcast service using MMT as a media transport system can be received. To obtain the current time information.

  Contrary to the control described above, the current time information provided by the broadcast service adopting MMT as the media transport method is superimposed on the content of the broadcast service adopting MPEG2-TS as the media transport method. Even if controlled, the same effect as described above can be obtained.

  Note that, as described above, control is performed so that the current time information provided by the broadcast service adopting MPEG2-TS as the media transport method is superimposed on the content of the broadcast service adopting MMT as the media transport method. And any case of controlling to superimpose the current time information provided by the broadcast service adopting MMT as the media transport method on the content of the broadcast service adopting MPEG2-TS as the media transport method In the same manner as in the description of [Broadcast receiving apparatus time management] in the first embodiment, the current time information can be corrected by referring to the “delta” parameter of the time information in the TMCC extended information area. Is possible.

  Also, in any case of a broadcast service that employs MMT as a media transport system and a broadcast service that employs MPEG2-TS as a media transport system, the MH-TOT or TOT transmitted by each broadcast service constituting the network is There is a possibility that the transmission side system has an error due to a malfunction or a transmission error. In the broadcast receiving apparatus 800 of the present embodiment, as a countermeasure against the MH-TOT or TOT error, when it is determined that the MH-TOT or TOT acquired from the service being received has an error, Has a function to update the time information of the built-in clock by acquiring the MH-TOT or TOT from any broadcast service of other networks or referring to the current time information And

  FIG. 26B shows an example of update processing of current time information when the broadcast receiving apparatus 800 of this embodiment receives a broadcast service that employs MPEG2-TS as the media transport method. Even when a broadcast service that employs MMT as the media transport method is being received, the same processing as that shown in FIG.

  When the time information of the built-in clock is updated in the broadcast receiving apparatus 800 of the present embodiment, first, MPEG2 of the broadcast service (broadcast service adopting MPEG2-TS as the media transport system) currently being received by the reception function execution unit 1102. -A TOT is acquired from the TS data string (S301), and the current time information is acquired by referring to the acquired TOT (S302). Next, the reception function execution unit 1102 performs a process of comparing the current time information acquired in the process of S302 with the time information of the built-in clock.

  As a result of the comparison process, when the difference between the current time information acquired in the process of S302 and the time information of the internal clock is within a predetermined value (for example, within 3 minutes) (S303: Yes), the reception function execution unit 1102 The time information of the built-in clock is updated using the current time information acquired in the process of S302 (S306). On the other hand, if the difference between the current time information acquired in the process of S302 and the time information of the built-in clock is not within a predetermined value as a result of the comparison process (S303: No), or the TOT acquired in S301 is included in the data. When it has a flag or the like indicating that there is an error, the reception function execution unit 1102 acquires the TOT from the MPEG2-TS data sequence of another broadcast service in the same network, or any other network The MH-TOT is acquired from the MMT data string of the broadcast service (broadcast service adopting MMT as the media transport system) (S304), and the current time information is acquired from the acquired TOT or MH-TOT (S305). . The reception function execution unit 1102 may perform the comparison process of S303 again using the current time information acquired in the process of S305.

  Through the above processing, when the broadcast receiving apparatus 800 of this embodiment determines that the MH-TOT or TOT acquired from the service being received has an error, the broadcast receiving apparatus 800 from the other broadcast service of the same network or other By acquiring MH-TOT or TOT from any broadcast service in the network and referring to the current time information, it is possible to update the time information of the built-in clock.

  If the current time information in which the difference from the time information of the built-in clock is within the predetermined range cannot be acquired by repeating the processing of S304 to S305, such as at the time of initial setting after factory shipment, the processing is acquired in the processing of S302. The time information of the built-in clock may be set again with the current time information. In this way, it is possible to cope with a case where there is an error in the time information side of the built-in clock of the broadcast receiving apparatus 800 of this embodiment.

[EPG display of broadcast receiver]
Event schedule information of a broadcast service adopting MMT as a media transport system is transmitted by MH-EIT or the like. On the other hand, event schedule information of a broadcast service that employs MPEG2-TS as a media transport system is transmitted by an EIT (Event Information Table) provided in SI defined in the MPEG-2 system. Therefore, in general, when displaying video information or the like provided by a broadcast service that employs MMT as a media transport method, event schedule information (MH-EIT) of the broadcast service that employs MMT is displayed. ) Can be obtained, and when displaying video information provided by a broadcast service adopting MPEG2-TS as a media transport method, event schedule information of the broadcast service employing MPEG2-TS is displayed. (EIT) can be acquired.

  However, the broadcast receiving apparatus 800 according to the present embodiment displays MPEG-2 TS as a media transport method even when displaying video information or the like provided by a broadcast service adopting MMT as a media transport method. Even when displaying video information and the like provided by a broadcasting service adopting the above, both the MH-EIT and the EIT can be acquired, improving the usability for the user.

  FIG. 27A shows an example of an EPG screen in the broadcast receiving apparatus 800 of the present embodiment. In the figure, an EPG screen 162i is an EPG screen created based on the MH-EIT of a broadcast service adopting MMT as a media transport method, and is “M1 TV”, “M2 broadcast”, “M3 channel”, “M4TV”. ”,“ TV M5 ”, and the like are broadcast station names of broadcast services that employ MMT as the media transport method. The EPG screen 162j is an EPG screen created based on the EIT of a broadcast service that employs MPEG2-TS as a media transport system. “T6 TV”, “T7 broadcast”, “T8 channel”, “T9TV” “TV TA” and the like are broadcast station names of broadcast services that employ MPEG2-TS as a media transport system.

  For example, when a user operates a remote controller (not shown) to instruct display of an EPG screen while viewing a broadcast program provided by a broadcast service that employs MMT as a media transport method, an initial screen of the EPG screen (shown) (Omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on the MH-EIT of a broadcasting service that employs MMT as a media transport method. Detailed information on the broadcast program of each channel “Nearby current time” is displayed. Next, the user desires to check the detailed information of the broadcast program of each channel “October 9th” of “October 9, 2014”, and operates the remote controller (not shown) to instruct to update the EPG screen. Then, the EPG screen 162i is displayed.

  Further, when the user desires to confirm detailed information of a broadcast program provided by a broadcast service adopting MPEG2-TS as a media transport method and operates a remote controller (not shown) to instruct switching of the network, EPG A screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of this embodiment, the initial screen of the EPG screen created based on the EIT of the broadcast service adopting MPEG2-TS as the media transport system (that is, “October 7, 2014” "17: 00-" of the broadcast program detailed information of each channel), and the same time zone as the EPG screen 162i displayed immediately before (that is, "October 9, 2014" ]) To display the detailed information of the broadcast program of each channel.

  With the above-described control, the user can continuously confirm detailed information regarding broadcast programs of the same time and same time zone of a plurality of networks having different media transport methods by a simple operation. That is, the usability of the broadcast receiving apparatus 800 is improved.

  FIG. 27B is a diagram illustrating an example different from the above-described EPG screen in the broadcast receiving device 800 of the present embodiment. The EPG screen 162k shows a state where the EPG screen 162i shown in FIG. 27A is scrolled in the channel direction (lateral direction) by operating the remote controller (not shown). That is, in the example shown in FIG. 27B, channel information and media created based on the MH-EIT of a broadcast service that employs MMT as the media transport method by scrolling the EPG screen in the channel direction (lateral direction). Channel information created based on EIT of a broadcast service that employs MPEG2-TS as a transport method is displayed seamlessly on the same time axis.

Therefore, the user creates based on the EIT of the broadcast service adopting MPEG2-TS as the media transport method while the channel information created based on the MH-EIT of the broadcast service adopting MMT as the media transport method is confirmed. Even when it is desired to confirm the channel information, an instruction to switch the network by operating a remote controller (not shown) can be made unnecessary. Furthermore, the user can simultaneously confirm detailed information regarding broadcast programs in the same day and same time zone of a plurality of networks having different media transport methods. That is, the usability of the broadcast receiving apparatus 800 is improved.
(Example 3)

  Hereinafter, Example 3 of the present invention will be described. Note that the configuration, effects, and the like in this example are the same as those in Example 1 unless otherwise specified. For this reason, below, the difference between a present Example and Example 1 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible.

  The broadcast receiving apparatus 100 according to the present embodiment is capable of supporting HDR (High Dynamic Range), which is a technique for expanding the luminance range of colors of video content, and expansion of a color gamut. Also, in the MMT that is a media transport system supported by the broadcast receiving apparatus 100 of the present embodiment, video reproduction as intended by the content producer is performed on a monitor device (such as the broadcast receiving apparatus 100 in the present embodiment) used by the user. For this purpose, it is assumed that the content information relating to the HDR and color gamut expansion can be transmitted together with the encoded data of the program content.

[System configuration]
The system configuration in the present embodiment is basically the same as the system configuration shown in FIG. As shown in FIG. 28, the encoded data of the program content included in the broadcast wave transmitted from the radio tower 300t is temporarily stored in the broadcast station server 300 from the content data output from the photographing device 390c. Instead of performing the processing, it may be sent by appropriately performing encoding processing, modulation processing, and the like. Alternatively, the content data output from the photographing device 390c is stored in the broadcast station server 300, and the content data subjected to the storage processing is subjected to various video / audio editing processes by the editing device 390e, and further encoded. The processing and modulation processing may be appropriately performed and transmitted.

  In addition to the program content encoded data and character information, other applications, general-purpose data, etc., the broadcast wave includes the brightness information of the program content and the equipment used when creating / editing the program content ( The content information descriptor describing information on the color reproduction performance of the photographing device 390c, the editing device 390e, etc.) is used as the control information (content information) related to the program content. It shall be sent with the table / descriptor.

[Data structure of content information descriptor]
FIG. 29A shows an example of the data structure of the content information descriptor. The content information descriptor may be arranged in MPT or MH-EIT. It is assumed that each parameter in the data structure of the content information descriptor has a function described below.

・ "Descriptor_tag (descriptor tag)"
The descriptor tag has a function of uniquely identifying each descriptor by a 16-bit field.

・ "Descriptor_length (descriptor length)"
The descriptor length shall indicate the total number of data bytes for each parameter following this field.

・ "Component_tag (component tag)"
The component tag is a label for uniquely identifying the component stream, and is described by a 16-bit field. The value is the same as the component tag described in the MH-stream identification descriptor.

・ "Content_type (content type)"
The content type represents the type of video content included in the component stream in accordance with FIG. 29B. When this parameter is “0”, it is assumed that the video content is one that has been subjected to video editing processing (such as a recorded program) by the editing device 390e. When this parameter is “1”, it indicates that the video content has been edited and processed by the editing device 390e (such as a recorded program), and that this content is compatible with HDR. To do. When this parameter is “2”, it is assumed that the video content is content data (such as a live broadcast program) output from the photographing device 390c. When this parameter is “3”, the video content is content data (such as a live broadcast program) output from the photographing device 390c, and indicates that this content is compatible with HDR. Further, other classifications may be performed using this parameter.

・ "Source_primaries_rx (source device primary color chromaticity coordinates (Rx))"
“Source_primaries_ry (source device primary color chromaticity coordinates (Ry))”
“Source_primaries_gx (source device primary color chromaticity coordinates (Gx))”
“Source_primaries_gy (source device primary color chromaticity coordinates (Gy))”
“Source_primaries_bx (source device primary color chromaticity coordinates (Bx))”
“Source_primaries_by (source device primary color chromaticity coordinates (By))”

  The source device primary color chromaticity coordinates are parameters indicating information relating to the color reproduction performance and the like of the source device, and the color gamuts that can be supported by the source device are R (red) / G (green) / B (blue) primary colors. The coordinate values on the CIE chromaticity diagram (CIExy chromaticity diagram) are shown. The source device is a monitor device of the editing device 390e when the “content_type” parameter is “0” or “1”. In this case, the source device primary color chromaticity coordinates indicate the chromaticity coordinate values of the color gamut that can be displayed on the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the source device primary color chromaticity coordinates indicate chromaticity coordinate values of a color gamut that can be output by the photographing device 390c.

  Each coordinate value on the CIE chromaticity diagram is indicated by a value in the range of “0.000” to “1.000”, and is described in a range of “0000000000b” to “1111101000b” in a 10-bit field. Shall be. For example, as shown in FIG. If the chromaticity coordinate value of R (red) in the 709 standard is “x = 0.640 (1010000000b)” and “y = 0.330 (0101001010b)”, BT. If the chromaticity coordinate value of G (green) in the 2020 standard is “x = 0.170 (0010101010b)”, “y = 0.997 (1100011101b)”.

・ "Source_white_point_x (source device white chromaticity coordinate (x))"
“Source_white_point_y (source device white chromaticity coordinate (y))”
The source device white chromaticity coordinates are parameters indicating information relating to the color reproduction performance and the like of the source device, and indicate coordinate values on the CIE chromaticity diagram of white reference points that can be handled by the source device. The source device is a monitor device of the editing device 390e when the “content_type” parameter is “0” or “1”. In this case, the source device white chromaticity coordinate indicates the chromaticity coordinate value of the white reference point of the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the source device white chromaticity coordinate indicates the chromaticity coordinate value of the white reference point that can be output by the photographing device 390c.

  Each coordinate value on the CIE chromaticity diagram is indicated by a value in a range of “0.0000” to “1.000”, and is described in a range of “00000000000000b” to “10011100010000b” in a 14-bit field. Shall be. For example, as shown in FIG. 709 standard and BT. In the case of the chromaticity coordinate value of the white reference point in the 2020 standard, “x = 0.3127 (001110000101111b)” and “y = 0.3290 (00110011101010b)”.

・ "Source_luminance_max (source device maximum brightness)"
"Source_luminance_min (source device minimum brightness)"
The source device maximum brightness and the source device minimum brightness are parameters indicating information on the maximum brightness and the minimum brightness that can be supported by the source device. The source device is a monitor device of the editing device 390e when the “content_type” parameter is “0” or “1”. In this case, the maximum brightness of the source device and the minimum brightness of the source device indicate the maximum value and the minimum value of the brightness that can be displayed on the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the maximum brightness of the source device and the minimum brightness of the source device indicate the maximum value and the minimum value of the brightness that can be output by the photographing device 390c.

The maximum luminance of the source device is indicated by a value in the range of “1 (cd / m ² : candela / square meter)” to “65535 (cd / m ² )”, and “0000h” to “FFFFh” in a 16-bit field. It shall be described in the range. The minimum luminance of the source device is indicated by a value in the range of “0.0001 (cd / m ² )” to “6.5535 (cd / m ² )”, and “0000h” to “FFFFh” in a 16-bit field. It shall be described in the range.

・ "Num_of_scene (number of scenes)"
The number of scenes indicates the number of scenes (may be referred to as chapters) constituting the video content included in the component stream. When the number of scenes is “1”, this parameter may be omitted.

・ "Scene_start_time (scene start time)"
The scene start time indicates the start time of the scene (chapter) in a 40-bit field. The upper 16 bits of this field indicate the lower 16 bits of the modified Julian date (MJD), and the lower 24 bits indicate the hour, minute and second of Japan Standard Time (JST) with a 6-digit BCD code. When the number of scenes is “1”, this parameter may be omitted.

・ “Scene_duration (scene duration)”
The scene duration is a 24-bit field indicating the duration of a scene (chapter). This field indicates the hour, minute and second of the duration with a 6-digit BCD code. When the number of scenes is “1”, this parameter may be omitted.

・ "Max_light_level_of_content (content maximum brightness)"
The maximum content brightness indicates the maximum brightness in each scene (chapter) in a 16-bit field. When the number of scenes is “1”, this parameter indicates the maximum luminance value throughout the content. The maximum content brightness is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is described in a range of “0000h” to “FFFFh” in a 16-bit field. Shall be.

"Max_frame_ave_light_level (maximum frame average brightness)"
The maximum frame average luminance indicates the maximum value of the frame average luminance in each scene (chapter) in a 16-bit field. When the number of scenes is “1”, this parameter indicates the maximum value of the average frame luminance throughout the entire content. The maximum frame average brightness is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is a 16-bit field in the range of “0000h” to “FFFFh”. Shall be described.

・ "Max_light_level_of_frame (maximum luminance in the frame)"
The maximum luminance within a frame is a 16-bit field indicating the maximum luminance within each frame. The maximum luminance in the frame is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is a 16-bit field in the range of “0000h” to “FFFFh”. Shall be described.

・ "Frame_average_light_level (average luminance in the frame)"
The average luminance within a frame shall indicate the average luminance of each frame in a 16-bit field. The average luminance within the frame is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is a 16-bit field in the range of “0000h” to “FFFFh”. Shall be described.

・ "EOTF_identification (EOTF identification)"
EOTF (Electro-Optical Transfer Function) identification identifies the type of conversion characteristic (transfer characteristic) between an electrical signal and an optical signal such as gamma correction applied to the video signal of the video content included in the component stream. . For example, in the example shown in FIG. 29D, when this parameter is “0”, the video content is BT. It shows that gamma correction suitable for a monitor device with display characteristics conforming to 709 has been performed. When this parameter is “2”, the video content is BT. It shows that 10-bit processing gamma correction suitable for a monitor device with display characteristics compliant with 2020 has been performed. When this parameter is “3”, the video content is BT. This indicates that 12-bit processing gamma correction suitable for a monitor device with display characteristics compliant with 2020 is performed. In addition, when this parameter is “4”, it indicates that the video content has been subjected to gamma correction suitable for a monitor device having display characteristics compliant with SMPTE 2084. Further, other classifications may be performed using this parameter. Further, the “EOTF identification” parameter may be capable of identifying the type of colorimetry and the like. Note that the types of conversion characteristics (transfer characteristics) of electrical signals and optical signals shown in FIG. 29D are only examples, and the video signals of video content are processed with the conversion characteristics (transfer characteristics) of other electrical signals and optical signals. The characteristics may be identified by the “EOTF identification” parameter.

  Here, the broadcast receiving apparatus 100 that has received the video content and the “EOTF identification” parameter refers to the “EOTF identification” parameter associated with the video content, and further displays characteristics of the monitor device that displays the video content. Referring to the above, by performing processing such as appropriate electro-optical conversion based on both, it is possible to display each video content in a state suitable for the monitor device. For example, when the transfer characteristic identified by the “EOTF identification” parameter associated with the video content corresponds to the display characteristic of the monitor device that displays the video content, the “EOTF identification” parameter is used in the display process. The electro-optical conversion identified by (1) may be performed as it is. Further, when the transfer characteristic identified by the “EOTF identification” parameter associated with the video content does not correspond to the display characteristic of the monitor device that displays the video content, the transmission characteristic is identified by the “EOTF identification” parameter. Instead of performing the electrical-optical conversion as it is, the video signal subjected to the conversion process between the electrical signal and the optical signal according to the identification of the “EOTF identification” parameter corresponds to the display characteristic of the monitor device. After performing the conversion process for converting into a video signal suitable for the above process, the display process for performing the electro-optical conversion corresponding to the display characteristics of the monitor device may be performed.

  The video signal that has been subjected to the conversion process between the electrical signal and the optical signal according to the identification of the “EOTF identification” parameter is converted into a video signal suitable for the electrical-optical conversion process corresponding to the display characteristics of the monitor device. The conversion process for conversion will be described below. Hereinafter, the above-described processing is referred to as transfer characteristic conversion processing.

  Note that video content having values of “2”, “3”, and “4” in the “EOTF identification” parameter is HDR video content having a wide range of light and darkness that can be expressed, a color gamut, and the like. On the other hand, video content having a value of “0” in the “EOTF identification” parameter is SDR (Standard Dynamic Range) video content that has a narrower range of expressible brightness, color gamut, and the like that is narrower than HDR video content.

  BT. A display device with display characteristics compliant with 2020 and a display device with display characteristics compliant with SMPTE 2084 can be referred to as HDR compatible display devices. In contrast, BT. A display device with display characteristics compliant with 709 can be referred to as an SDR-compatible display device. Furthermore, BT. 709-compliant display characteristics display device, A display device that does not support HDR display characteristics, such as 2020 and SMPTE 2084, may be referred to as an SDR-compatible display device (non-HDR compatible display device) as a subordinate concept of the SDR-compatible display device.

  Here, the HDR video content is converted to BT. When display is performed on an SDR compatible display device (non-HDR compatible display device) such as a display device compliant with 709, when the transfer characteristic conversion process is not performed, a wide range or color gamut of the HDR video content is included. And the like cannot be expressed on the monitor device, resulting in a display image that is difficult to see and that has luminance collapse and color collapse. That is, in this case, in the transfer characteristic conversion process, a process for converting a wide light / dark range or color gamut of the HDR video content to fall within a light / dark range or color gamut that can be expressed by the monitor device is performed. Just do it. This processing may be expressed as light / dark dynamic range reduction conversion and color gamut reduction conversion. In addition, since it is a process of converting an HDR video content having a wide expressible brightness range, color gamut, etc. into an SDR video content having a narrow expressible brightness range, color gamut, etc., it is expressed as an HDR-SDR conversion process. Also good.

  On the other hand, video content having a value of “0” in the “EOTF identification” parameter is an SDR video content that has a narrow expressible brightness range, color gamut, and the like. The SDR video content is converted to BT. When displaying on an HDR compatible display device such as a monitor device having a display characteristic conforming to 2020, when the transfer characteristic conversion process is not performed, the wide light / dark display performance and color gamut display performance of the monitor device are fully utilized. I can't. That is, in this case, in the transfer characteristic conversion process, the conversion process may be performed on the SDR video content so that the wide light / dark display performance and color gamut display performance of the monitor device can be fully utilized. This processing may be expressed as light / dark dynamic range expansion conversion and color gamut expansion conversion. In addition, since it is a process of converting SDR video content having a narrow expressible brightness range and color gamut into HDR video content having a wide expressible brightness range and color gamut, it is expressed as SDR-HDR conversion processing. Also good. Note that the SDR-HDR conversion process is not always necessary, and the SDR video content is converted to BT. When displaying on an HDR compatible display device such as a monitor device having a display characteristic conforming to 2020, the SDR-HDR conversion process may not be performed. In this case, the light / dark display performance and the color gamut display performance remain in the range of the display characteristics of the SDR, but there is no problem because the display image does not become difficult to see and has a luminance collapse or color collapse.

  It should be noted that the video content received by the broadcast receiving apparatus 100 is not associated with the “EOTF identification” parameter and cannot be acquired (when it is not originally transmitted), or “video associated with the video content received by the broadcast receiving apparatus 100”. As an example of processing when the value of the “EOTF identification” parameter cannot be acquired due to a transmission error or the like and cannot be determined, the following processing may be performed.

  As a first processing example, the value of the “EOTF identification” parameter of the received video content may be handled as “2” or “3”, for example. That is, if the value of the “EOTF identification” parameter cannot be identified, the video content may be handled as HDR video content. In this way, the monitor device is BT. The HDR compatible display device such as a display device compliant with 2020 does not perform the transfer characteristic conversion process. However, if the actual content is HDR video content, an appropriate display is performed, and the actual content is SDR video content. However, the brightness / darkness display performance and the color gamut display performance remain in the range of the display characteristics of the SDR, but the display image is not easy to see and has a luminance collapse or color collapse. Further, the monitor device is BT. In the case of an SDR compatible display device (non-HDR compatible display device) such as a monitor device with display characteristics 709 compliant, the transfer characteristic conversion process is performed by treating the video content as HDR video content. If the content is HDR video content, it is displayed after appropriate HDR-SDR conversion processing, and even if the actual content is SDR video content, the light / dark display performance and the color gamut display performance are more than the range of display characteristics of SDR. Although it is further limited, it is possible to avoid a display image that is hard to see and has a luminance or color that cannot express at least the light and dark range or color gamut of the video content. (SDR-HDR conversion processing is performed when the actual content is HDR video content, or HDR-SDR conversion is performed on the SDR-compatible display device (non-HDR compatible display device) when the actual content is HDR video content. In the case of displaying as it is without performing, there is a possibility that such a hard-to-see display image with luminance collapse or color collapse may be displayed, but this situation can be avoided in the first processing example.)

  According to the first processing example described above, when the value of the “EOTF identification” parameter cannot be identified, the video content is handled as HDR video content, so that the monitor device is an HDR-compatible display device. Even if it is an SDR compatible display device (non-HDR compatible display device), even if the actual content is HDR video content or SDR video content, video display with less problems for the user is possible.

  In addition, as another second processing example of the processing when the value of the “EOTF identification” parameter cannot be acquired (including the case of not being transmitted, a transmission error, etc., or an invalid value), a video component descriptor Or the like, it may be determined whether to handle as HDR video content or SDR video content.

  For example, even when the value of the “EOTF identification” parameter cannot be identified, the parameter relating to the resolution of the video signal indicates that the resolution of the video content is a high-resolution content such as 3840 × 2160 pixels or 7680 × 4320 pixels. If it is shown, it may be determined that the content is HDR video content. Specifically, the value of the “EOTF identification” parameter may be interpreted as “2” or “3”. Since high resolution content of 3840 × 2160 pixels or 7680 × 4320 pixels is expected to be prepared as HDR video content in the future, it is likely that appropriate display is performed probabilistically by such processing.

  In addition, even when the value of the “EOTF identification” parameter cannot be identified, if the parameter relating to the resolution of the video signal indicates that the resolution of the video content is 1920 × 1080 pixels or less, the SDR video You may judge that it is content. Specifically, the value of the “EOTF identification” parameter may be interpreted as “0”. Content having a resolution of 1920 × 1080 pixels or less includes a large number of existing SDR content, and thus, appropriate display is likely to be performed probabilistically by such processing.

  According to the above-described second processing example, when the value of the “EOTF identification” parameter cannot be identified, it is easy to perform display appropriately stochastically by making a determination with reference to the parameter relating to the resolution.

  Next, a process when the value of the “EOTF identification” parameter associated with the video content received by the broadcast receiving apparatus 100 is a value for which a relationship with the display characteristics is not prepared in the table of FIG. 29D will be described. Here, in the table of FIG. 29D, the value for which the relationship with the display characteristic is not prepared means that the value of the “EOTF identification” parameter in the table of FIG. 29D is “1” or “5” to “15” in the future. This is a case where a reserved value or an unexpected value is stored. These values may be expressed as invalid values. Even in the case of such an invalid value (a value for which a relationship with display characteristics is not prepared), if either the first processing example or the second processing example described above is performed, the same effect is obtained. Is obtained.

  In the configuration diagram of FIG. 7A, various video processes corresponding to the “EOTF identification” parameter described above are performed by the video color gamut conversion unit 142 controlled by the control of the main control unit 101 based on the data separated by the separation unit 132. Just do it.

  Here, when the video content to be displayed is switched between the HDR video content and the SDR video content due to a program change or channel switching, the timing at which the decoded video from the video decoder 141 in FIG. 7A is switched between the HDR video content and the SDR video content. It is ideal that the timing at which the video processing of the video color gamut conversion unit 142 is switched between the processing for HDR video content and the processing for SDR video content is aligned. However, in reality, it is conceivable that there is a considerable timing shift.

  When switching from HDR video content to SDR video content in an HDR-compatible display device that performs SDR-HDR conversion processing on SDR video content, the timing at which video processing of the video color gamut conversion unit 142 switches from the video decoder 141 If it becomes earlier than the switching timing of the decoded video, it takes time to perform the SDR-HDR conversion process on the HDR video content, and there is a possibility that an unclear display video with luminance collapse or color collapse may be displayed. . Therefore, when switching from HDR video content to SDR video content, the main control unit 101 sets the video processing switching timing of the video color gamut conversion unit 142 to be later than the switching timing of the decoded video from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, control may be performed so that the video is in a video mute state such as a black display before the switching of the two starts processing, and the video mute state such as a black display of the video is canceled after the switching between the two is completed. .

  In addition, in an HDR-compatible display device that performs SDR-HDR conversion processing on SDR video content, the timing at which the video processing of the video color gamut conversion unit 142 switches when the SDR video content switches to HDR video content is the video decoder 141. If it becomes later than the switching timing of the decoded video from the time, it takes time to perform the SDR-HDR conversion processing on the HDR video content, and there is a possibility that an unclear display video with luminance collapse or color collapse may be displayed. End up. Therefore, when switching from SDR video content to HDR video content, the main control unit 101 causes the video color gamut conversion unit 142 to switch the video processing timing earlier than the decoded video switching timing from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, control may be performed so that the video is in a video mute state such as a black display before the switching of the two starts processing, and the video mute state such as a black display of the video is canceled after the switching between the two is completed. .

  When switching from HDR video content to SDR video content in an SDR-compatible display device that performs HDR-SDR conversion processing on HDR video content and displays SDR video content without performing transfer characteristic conversion processing, If the timing of switching the video processing of the color gamut conversion unit 142 is earlier than the switching timing of the decoded video from the video decoder 141, the HDR video content is displayed as it is on the SDR compatible display device without performing the transfer characteristic conversion processing. This causes the possibility of displaying a difficult-to-view display image with a loss of brightness or color. Therefore, when switching from HDR video content to SDR video content, the main control unit 101 sets the video processing switching timing of the video color gamut conversion unit 142 to be later than the switching timing of the decoded video from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, control may be performed so that the video is in a video mute state such as a black display before the switching of the two starts processing, and the video mute state such as a black display of the video is canceled after the switching between the two is completed. .

  In an SDR-compatible display device that performs HDR-SDR conversion processing on HDR video content and displays SDR video content without performing transfer characteristic conversion processing, when switching from SDR video content to HDR video content, If the timing of switching the video processing of the color gamut conversion unit 142 becomes later than the timing of switching the decoded video from the video decoder 141, the HDR video content is displayed on the SDR compatible display device as it is without performing the transfer characteristic conversion processing. This causes the possibility of displaying a display image that is difficult to see and that is obscured in brightness and color. Therefore, when switching from SDR video content to HDR video content, the main control unit 101 causes the video color gamut conversion unit 142 to switch the video processing timing earlier than the decoded video switching timing from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, control may be performed so that the video is in a video mute state such as a black display before the switching of the two starts processing, and the video mute state such as a black display of the video is canceled after the switching between the two is completed. .

  As described above, by performing the processing related to the switching timing of the decoded video and the switching timing of the transfer characteristic conversion processing, it is possible to avoid presenting an unclear display video with luminance collapse or color collapse to the user. It becomes.

  In addition to or in addition to the identification process using the “EOTF_identification” parameter in the content information descriptor described above and various video processes, the same identification as the above-mentioned “EOTF_identification” parameter is possible in the encoded video stream. May be inserted, and identification processing and various video processing using the inserted flag may be performed. The identification process and various video processes when the “EOTF_identification” flag as the flag in the encoded video stream is used are the same as the identification process and various video processes when the “EOTF_identification” parameter in the content information descriptor is used. In the description, instead of referring to the “EOTF_identification” parameter in the content information descriptor, it may be performed by referring to the “EOTF_identification” flag inserted in the encoded video stream, and thus detailed description is omitted. To do.

  However, if the “EOTF_identification” flag as an encoded video stream flag is inserted into the encoded video stream, for example, in units of frames or GOPs, the content information descriptor set in units of assets or programs It is possible to realize switching between HDR video content and SDR video content and switching of various video processes corresponding to each video content in a time unit finer than when the “EOTF_identification” parameter is used. That is, the video decoder 141 can grasp the switching between the HDR video content and the SDR video content in units of frames or GOPs, and the video color gamut conversion unit 142 in the subsequent stage can detect the HDR video content and SDR video in units of frames or GOPs. Since the content identification information can be referred to, the synchronization accuracy of the video processing switching timing in the video color gamut conversion unit 142 is also improved as compared with the case where the “EOTF_identification” parameter in the content information descriptor is used. There is.

  In addition, when the transmission of the “EOTF_identification” flag in the encoded video stream and the transmission of the “EOTF_identification” parameter in the content information descriptor are used together, the identification process using the “EOTF_identification” flag in the encoded video stream is performed. The “EOTF_identification” parameter in the content information descriptor used for switching the video processing of the video color gamut conversion unit 142 is, for example, an HDR video content program when the program is displayed in a program guide or program information in units of programs. If it is used for display for telling the user whether it is an SDR video content program or the like, the identification information of both can be used properly.

  In the case where the transmission of the “EOTF_identification” flag in the encoded video stream and the transmission of the “EOTF_identification” parameter in the content information descriptor are used together, The following can be considered. As a first processing example, an “EOTF_identification” flag in an encoded video stream is preferentially used. In this case, there is an advantage that the switching between the HDR video content and the SDR video content as described above can be accurately synchronized with the switching timing of the corresponding video processing. As a second processing example, an “EOTF_identification” parameter in the content information descriptor is preferentially used. In this case, there is an advantage that the transfer characteristics and the like can be quickly identified without referring to the encoded video stream.

  Note that the content information descriptor described above may have a data structure different from that shown in FIG. 29A. For example, another parameter different from each parameter may be further provided, or not all the parameters may be provided. Further, different names may be used for the respective parameters. The parameters do not necessarily need to be described in one descriptor, and may be described in two different descriptors, for example. Each parameter may be described in a descriptor and arranged in a table, or may be described directly in a table.

[EPG display of broadcast receiver]
Also in the broadcast receiving apparatus 100 of the present embodiment, as in the first embodiment, information such as the start time and broadcast time of each event (broadcast program) is obtained by identifying the service ID with reference to the MH-EIT or the like. The EPG screen can be created by acquiring the EPG, and the created EPG can be displayed on the monitor unit 162 by superimposing the created EPG on the video information or the like by the video composition unit 161.

  Furthermore, in the broadcast receiving apparatus 100 according to the present embodiment, the “content_type” parameter of the content information descriptor is referred to, and the video content type of each broadcast program is “1” or “3”. As shown in FIG. 30, a symbol or the like representing an attribute indicating that the broadcast program is a program compatible with HDR may be displayed. The symbol or the like indicating the attribute may be, for example, a symbol / character indicating that the program is compatible with HDR, or symbolizes “HDR” indicating that the program is compatible with HDR. The mark 162a5 may be used. A symbol or the like representing the attribute may be displayed in the title area 162a2 of the detailed information 162a1. Alternatively, when the cursor is placed on the detailed information 162a1, it may be displayed in a pop-up. It may be displayed by other methods.

  Further, when the content information descriptor separately includes “HDR_flag” or the like that is a parameter indicating whether or not the video content of the broadcast program is compatible with HDR, refer to the “HDR_flag” parameter. By doing so, it may be controlled whether or not to display a symbol or the like representing an attribute indicating that the broadcast program is a program compatible with HDR. The name of the “HDR_flag” parameter is an example, and a different name may be used.

Further, when all or any of the “source_luminance_max” parameter, the “max_light_level_of_content” parameter, the “max_light_level_of_frame” parameter, etc. of the content information descriptor exceeds a predetermined value (for example, “100 (cd / m ² )”, etc.) Control may be performed so as to display a symbol or the like representing an attribute indicating that the broadcast program is a program compatible with HDR.

Note that the “content_type” parameter or the like of the content information descriptor is referred to, and even if the video content type of each broadcast program is “1” or “3”, or “source_luminance_max” of the content information descriptor is used. ”Parameter,“ max_light_level_of_content ”parameter,“ max_light_level_of_frame ”parameter, etc., even if all or any of them exceed a predetermined value (for example,“ 100 (cd / m ² ) ”etc.), the monitoring unit of the broadcast receiving apparatus 100 If 162 does not support HDR, a symbol / character indicating that it is a broadcast program corresponding to the HDR or a symbol 162a5 symbolizing “HDR” indicating that it is a broadcast program compatible with the HDR Control may be performed so as not to display.

  In addition, the broadcast receiving apparatus 100 according to the present embodiment refers to the “EOTF_identification” parameter of the content information descriptor, and the type of gamma correction applied to the video content of each broadcast program is the monitor 162 of the broadcast receiving apparatus 100. When the type is compatible with display characteristics, a symbol or the like indicating an attribute indicating that the broadcast program is a program that can be displayed with a correct luminance expression may be displayed. The symbol representing the attribute may be, for example, a symbol / character indicating that the program can be displayed with the correct luminance expression, or “True” indicating that the program can be displayed with the correct luminance expression. It may be a mark 162a6 symbolizing “Contrast”. Note that the case where the type of gamma correction applied to the video content of each broadcast program is a type that can be supported by the display characteristics of the monitor unit 162 of the broadcast receiving apparatus 100, for example, “EOTF_identification” related to the video content. ] Parameter is “0”, and the display characteristic of the monitor unit 162 of the broadcast receiving apparatus 100 is BT. 709, and so on.

  By displaying the symbols representing the attributes as described above in the detailed information 162a1 of the EPG screen 162a, the user can correctly express whether or not each broadcast program displayed on the EPG screen 162a is compatible with HDR. It is possible to easily grasp whether or not the program can be displayed on the screen.

[Built-in color gamut conversion process]
In this embodiment, it is assumed that video content that is a recorded program has been subjected to video / audio editing processing by an editing device 390e as shown in FIG. That is, the video content provider performs editing processing of the video content while confirming with the monitor device of the editing device 390e. Therefore, the video content is suitable under the color reproduction performance of the monitoring device of the editing device 390e. There is a high possibility that the display is performed. On the other hand, the monitor unit 162 of the broadcast receiving apparatus 100, which is a monitor apparatus used by the user to view the video content, generally has different color reproduction performance for each manufacturer and model. In this case, if the color reproduction performance of the monitor device of the editing device 390e and the color reproduction performance of the monitor unit 162 of the broadcast receiving device 100 are significantly different, the video content is displayed on the monitor unit 162 of the broadcast receiving device 100. In this case, there is a possibility that a problem that the video expression intended by the video content provider cannot be correctly performed may occur.

  That is, in the broadcasting system of the present embodiment, as described above, the content information descriptor is transmitted as the MMT-SI descriptor. In this content information descriptor, as parameters indicating information on the color reproduction performance of the source device, the R / G / B primary colors and white reference points of the color gamut that can be supported by the source device on the CIE chromaticity diagram. Coordinate values are shown.

  In addition, the broadcast receiving apparatus 100 according to the present exemplary embodiment includes a color gamut R / G / that can be supported by the monitor unit 162 as a parameter indicating information regarding the color reproduction performance of the monitor unit 162 in various information storage areas of the storage unit 110. It is assumed that the coordinate values on the CIE chromaticity diagram of each primary color of B and the white reference point are stored. In this situation, the coordinates of R / G / B primary colors and white reference points of the color gamut that can be supported by the source device described in the content information descriptor are R0 / The coordinates of the R / G / B primary colors and the white reference point of the color gamut that are G0 / B0 and W0 and can be supported by the monitor unit 162 stored in the various information storage areas of the storage unit 110 are R1 / R1, respectively. In the case of G1 / B1 and W1, among the areas constituted by R0 / G0 / B0, which is a color gamut that can be handled by the source device, R1 / G1 / is a color gamut that the monitor unit 162 can handle. A portion that does not overlap with the region formed by B1 is a region that may not be displayed correctly on the monitor unit 162.

  In order to solve the above-described problem, the broadcast receiving apparatus 100 according to the present embodiment stores the color gamut that can be supported by the source device described in the content information descriptor and the various information storage areas of the storage unit 110. A color gamut conversion processing function is provided for converting video data of the video content into video data suitable for display on the monitor unit 162 when there is a deviation from a color gamut that the monitor unit 162 can handle. . Below, the said color gamut conversion function with which the broadcast receiving apparatus 100 is provided is demonstrated.

  The color gamut conversion processing function of the broadcast receiving apparatus 100 according to the present embodiment is the color gamut of the video data (R0 / G0 / B0 which is the color gamut that can be supported by the source device shown in FIG. 31A). This is a function for converting a color gamut based on the color reproduction performance of the monitor unit 162 (a region constituted by R1 / G1 / B1 shown in FIG. 31A).

  The color gamut conversion processing function provided in the broadcast receiving apparatus 100 according to the present embodiment is configured so that the color gamut of the video data corresponds to the R / G / of the color gamut that can be supported by the source device described in the content information descriptor. By referring to the coordinate value of each primary color of B and the coordinate value of each primary color of R / G / B of the color gamut that can be supported by the monitor unit 162 stored in various information storage areas of the storage unit 110, The conversion may be performed so that correct color reproduction on the monitor unit 162 is possible.

  Note that, on the line segment R0 / G0 (or in the vicinity thereof), the R / G primary color coordinate values of the color gamut that the source device can handle and the R / G primary colors of the color gamut that the monitor unit 162 can handle. The color gamut conversion process may be performed by referring to only the coordinate values of. On the line segment G0 / B0 (or in the vicinity thereof), the coordinate values of the G / B primary colors in the color gamut that the source device can handle and the G / B primary colors in the color gamut that the monitor unit 162 can handle. The color gamut conversion process may be performed by referring only to the coordinate values. On the line segment R0 / B0 (or in the vicinity thereof), the coordinate values of the R / B primary colors in the color gamut that the source device can handle and the R / B primary colors in the color gamut that the monitor unit 162 can handle. The color gamut conversion process may be performed by referring only to the coordinate values.

  Alternatively, as shown in FIG. 31B, the color gamut of the video data may be divided into three areas, and the color gamut conversion process may be different for each divided area. For example, in the area constituted by R0 / G0 / W0 in the color gamut of the video data, the coordinate values of the R / G primary colors and white reference points of the color gamut that the source device can handle and the monitor The color gamut conversion processing is performed by referring to the R / G primary colors of the color gamut that can be handled by the unit 162 and the coordinate values of the white reference point. In the area constituted by G0 / B0 / W0 in the color gamut of the video data, the coordinate values of the primary colors and white reference points of G / B in the color gamut that can be supported by the source device, and the monitor unit 162 Gamut conversion processing is performed by referring to the respective primary colors of G / B and the coordinate values of the white reference point in the color gamut that can be supported by. In the area constituted by R0 / B0 / W0 in the color gamut of the video data, the coordinate values of the primary colors and white reference points of the R / B of the color gamut that can be supported by the source device and the monitor unit 162 Gamut conversion processing is performed by referring to the R / B primary colors of the color gamut and the coordinate value of the white reference point.

  Further, when the color gamut conversion process is made different for each of the divided areas, further, on the line segment R0 / W0 (or its neighboring area), the R primary color and white reference point of the color gamut that the source device can handle. The color gamut conversion process may be performed by referring only to the coordinate values of the R primary color and the white reference point of the color gamut that the monitor unit 162 can correspond to. On the line segment G0 / W0 (or in the vicinity thereof), the G primary color in the color gamut that the source device can handle and the coordinate value of the white reference point and the G primary color in the color gamut that the monitor unit 162 can handle. The color gamut conversion process may be performed by referring only to the coordinate value of the white reference point. On the line segment B0 / W0 (or in the vicinity thereof), the primary color of B in the color gamut that can be handled by the source device, the coordinate value of the white reference point, the primary color of B in the color gamut that the monitor unit 162 can handle, and The color gamut conversion process may be performed by referring only to the coordinate value of the white reference point.

  An example of the color gamut conversion process will be described with reference to FIG. 31C. In the figure, R0, G0, B0 are the coordinates of each primary color of R / G / B of the color gamut that can be supported by the source device described in the content information descriptor, respectively (R0x, R0y), Assume that the coordinate values are (G0x, G0y) and (B0x, B0y). R1, G1, and B1 are the coordinates of R / G / B primary colors of the color gamut that can be supported by the monitor unit 162 stored in various information storage areas of the storage unit 110, respectively (R1x, R1y ), (G1x, G1y), and (B1x, B1y) coordinate values. P0 is a predetermined color gamut data of the video content, and has a coordinate value of (P0x, P0y). In this case, the color gamut data of P0 is converted into the color gamut data shown by P1 by the color gamut conversion processing. Note that P1 has a coordinate value of (P1x, P1y), and is calculated by an arithmetic expression of the color gamut conversion process shown as an example below.

<Example of arithmetic expression for color gamut conversion>
P1 = αR1 + βG1 + γB1
However,
α = {(G0y-B0y) (P0x-B0x) + (B0x-G0x) (P0y-B0y)} / {(G0y-B0y) (R0x-B0x)
+ (B0x-G0x) (R0y-B0y)}
β = {(B0y-R0y) (P0x-B0x) + (R0x-B0x) (P0y-B0y)} / {(G0y-B0y) (R0x-B0x)
+ (B0x-G0x) (R0y-B0y)}
γ = 1-α-β

  Note that the arithmetic expression indicates that the color gamut conversion processing of all the color gamut data in the color gamut area of the video content is the R / G of the color gamut that can be supported by the source device described in the content information descriptor. By referring to the coordinate values of the primary colors of G / B and the coordinate values of the primary colors of R / G / B of the color gamut that can be supported by the monitor unit 162 stored in various information storage areas of the storage unit 110 This is an example of performing. Even when the color gamut of the video data is divided into three regions and the color gamut conversion processing is different for each divided region, the same calculation can be performed. (However, the parameters to be referred to are different.) Since the arithmetic expression is a well-known arithmetic expression using a barycentric coordinate system, a detailed description relating to the derivation of the arithmetic expression is omitted. The arithmetic expression is merely an example, and the coordinate value of P1 may be calculated using a different arithmetic expression.

  Further, when all of the color gamut areas of the video content are included in the color gamut areas that can be supported by the monitor device (the broadcast receiving apparatus 100 or the like), the color gamut conversion process may not be performed. . For example, the color gamut of the video content is BT. The color gamut equivalent to the 709 color gamut and compatible with the monitor device (broadcast receiving device 100, etc.) is BT. When the color gamut is the same as that of the 2020 series, the BT. All of the 709 color gamut area is the BT. Since it is included in the 2020 color gamut area, it is not necessary to perform the color gamut conversion process. That is, the monitor device (broadcast receiving device 100 or the like) can display all the color gamut data of the video content.

  As described above, according to the color gamut conversion processing function of the broadcast receiving apparatus 100 of the present embodiment, the color reproduction performance of the source device is different from the color reproduction performance of the monitor unit 162 of the broadcast receiving apparatus 100. Even when the video content is displayed on the monitor unit 162 of the broadcast receiving apparatus 100, the video content can be suitably displayed.

[Brightness adjustment processing of broadcast receiver]
The broadcast receiving apparatus 100 of the present embodiment is assumed to include image quality adjustment items as shown in FIG. Each of the image quality adjustment items can be adjusted according to the user's preference by the user's operation. On the other hand, among the image quality adjustment items, items relating to luminance adjustment may be capable of automatic luminance adjustment with reference to the description of the content information descriptor. The automatic brightness adjustment process will be described below.

  In the broadcast receiving apparatus 100 according to the present embodiment, (1) automatic luminance adjustment is performed with reference to the “source_luminance_max” parameter and the “source_luminance_min” parameter in the content information descriptor. (2) “max_light_level_of_content” parameter and “source_luminance_min” It is assumed that automatic brightness adjustment can be performed by referring to parameters, and (3) automatic adjustment can be performed by referring only to the “max_light_level_of_content” parameter.

  The broadcast receiving apparatus 100 according to the present embodiment stores the maximum and minimum luminance values that can be displayed on the monitor unit 162 as parameters indicating information on the luminance display performance of the monitor unit 162 in various information storage areas of the storage unit 110. Suppose you are.

  The automatic brightness adjustment of the method (1) is displayed on the “source_luminance_max” parameter and the “source_luminance_min” parameter described in the content information descriptor, and on the monitor unit 162 stored in various information storage areas of the storage unit 110. This is done by referring to the maximum / minimum possible luminance values.

  That is, as shown in FIG. 33A, the luminance level indicated by the “source_luminance_max” parameter substantially matches the luminance level of the maximum luminance that can be displayed on the monitor unit 162, and is set to the “source_luminance_min” parameter. The conversion process of the luminance expression range of the video content is performed so that the displayed luminance level substantially matches the minimum luminance level that can be displayed on the monitor unit 162. By performing the conversion process of the luminance expression range, the user can monitor the video content having the same luminance expression as that of the monitor device of the editing device 390e used by the content provider for editing the content. 162 can be viewed.

  The automatic brightness adjustment of the method (2) is displayed on the “max_light_level_of_content” parameter and the “source_luminance_min” parameter described in the content information descriptor and the monitor unit 162 stored in various information storage areas of the storage unit 110. This is done by referring to the maximum / minimum possible luminance values.

  That is, as shown in FIG. 33B, the luminance level indicated by the “max_light_level_of_content” parameter substantially matches the luminance level of the maximum luminance that can be displayed on the monitor unit 162, and is set to the “source_luminance_min” parameter. The conversion process of the luminance expression range of the video content is performed so that the displayed luminance level substantially matches the minimum luminance level that can be displayed on the monitor unit 162. By performing the conversion process of the luminance expression range, the user can view the video content by making full use of the contrast performance of the monitor unit 162 of the broadcast receiving apparatus 100.

  When the content information descriptor further includes a parameter indicating the minimum luminance in each scene (chapter) (for example, “min_light_level_of_content (content minimum luminance)”, etc.), the parameter is replaced with the “source_luminance_min” parameter. By referring to the “min_light_level_of_content” parameter, the contrast performance of the monitor unit 162 of the broadcast receiving apparatus 100 can be used more effectively.

  Further, the conversion processing of the luminance expression range in the method (2) may be performed by changing the parameter referred to for each scene (chapter) when the “num_of_scene” parameter is not “1”. In this case, it is possible to ensure suitable contrast performance in the monitor unit 162 of the broadcast receiving apparatus 100 for each scene (chapter).

The automatic brightness adjustment of the method (3) is performed by using the “max_light_level_of_content” parameter described in the content information descriptor and the maximum brightness value that can be displayed on the monitor unit 162 stored in various information storage areas of the storage unit 110. This is done with reference to The minimum value side of the luminance is based on “0 (cd / m ² )”. In this case, the same effect as the automatic brightness adjustment of the method (2) can be obtained, and the brightness expression range conversion process can be performed with a simple calculation by referring to a small number of parameters.
The luminance expression range conversion processing can be displayed on the monitor unit 162 in which the “source_luminance_max” parameter and the “max_light_level_of_content” parameter described in the content information descriptor are stored in various information storage areas of the storage unit 110, respectively. It may be performed only when the brightness is larger than the maximum value.

  That is, when the “source_luminance_max” parameter and the “max_light_level_of_content” parameter described in the content information descriptor are larger than the maximum brightness value that can be displayed on the monitor unit 162 stored in the various information storage areas of the storage unit 110. This is because, when the received video content is displayed on the monitor unit of the broadcast receiving apparatus 100 as it is, there is a possibility that the luminance collapse may occur, but in the opposite case, there is no possibility that the luminance collapse occurs.

  As described above, according to the automatic brightness adjustment processing of the broadcast receiving apparatus 100 of the present embodiment, the user can refer to the content information descriptor and the user can select a suitable value on the monitor unit 162 of the broadcast receiving apparatus 100. It is possible to view video content with luminance expression.

According to the present embodiment, by referring to the content information accompanying the program content included in the broadcast wave, it is possible to perform the above-described processes corresponding to the expansion of the HDR and the color gamut, and more useful broadcast reception compatible with MMT. An apparatus can be provided.
Example 4

  Hereinafter, Example 4 of the present invention will be described. The configuration, effects, and the like in this example are the same as those in Example 3 unless otherwise specified. For this reason, below, the difference between a present Example and Example 3 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible.

[System configuration]
FIG. 34 is a system configuration diagram showing an example of a broadcast communication system including the broadcast receiving apparatus of the present embodiment. The broadcast communication system of the present embodiment includes a broadcast receiver 40100 and an antenna 40100a, a connection cable 40200, a monitor device 40300, a broadband network and router device 200r such as the Internet 200, a radio tower 300t and a broadcast satellite (or communication satellite). 300s, broadcast station server 300, service provider server 400, and other application servers 500. Although not shown, the access point 200a, the mobile phone communication server 600, and the base station 600b of the mobile phone communication network are connected in the same manner as in the system configuration diagram (see FIG. 1) of the broadcast communication system of the first embodiment. The portable information terminal 700 may be further included. In this case, the portable information terminal 700 may be able to communicate directly with the broadcast receiving device 40100 without using the router device 200r or the like.

  Further, as shown in FIG. 28, the encoded data of the program content included in the broadcast wave transmitted from the radio tower 300t may be output from the photographing device 390c, and various kinds of data may be output from the editing device 390e. Video / audio editing processing may be performed.

  The broadcast receiving device 40100 receives the broadcast wave transmitted from the radio tower 300t via the broadcast satellite (or communication satellite) 300s and the antenna 40100a. Alternatively, the broadcast wave transmitted from the radio tower 300t may be received directly from the antenna 40100a without passing through the broadcast satellite (or communication satellite) 300s. The broadcast receiving device 40100 can be connected to the Internet 200 via the router device 200r, and can transmit and receive data by communication with each server device and other communication devices on the Internet 200.

  The connection cable 40200 is a communication cable that connects the broadcast receiving apparatus 40100 and the monitor apparatus 40300, and transmits encoded video / audio data and the like output from the broadcast receiving apparatus 40100. The monitor device 40300 receives video information and audio information obtained by performing predetermined signal processing on the encoded video / audio data received via the connection cable 40200 via a display device such as a liquid crystal panel and a speaker. The video display device is provided to the user.

  The monitor device 40300 may be connected to the Internet 200 via the router device 200r, and may be capable of transmitting and receiving data through communication with each server device and other communication devices on the Internet 200. In addition, the monitor device 40300 may be able to receive broadcast waves transmitted from the radio tower 300t via an antenna 40300a (not shown).

[Hardware configuration of broadcast receiver]
FIG. 35A is a block diagram illustrating an example of an internal configuration of the broadcast receiving device 40100. The broadcast receiving apparatus 40100 includes a main control unit 101, a system bus 102, a ROM 103, a RAM 104, a storage (storage) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 40125, a tuner / demodulation unit 131, and a separation unit 132. , Video decoder 141, video color gamut conversion unit 142, audio decoder 143, character super decoder 144, subtitle decoder 145, subtitle synthesis unit 146, subtitle color gamut conversion unit 147, data decoder 151, cache unit 152, application control unit 153, A browser unit 154, an application color gamut conversion unit 155, a sound source unit 156, a video synthesis unit 161, a video output unit 163, a voice synthesis unit 164, a voice output unit 166, an operation input unit 170, and a transcode processing unit 40181. .

  The broadcast receiving apparatus 40100 of this embodiment is assumed to be an optical disk drive recorder such as a DVD recorder or a BD recorder, a magnetic disk drive recorder such as an HDD recorder, an STB, or the like. That is, the monitor unit 162 and the speaker unit 165 may be omitted as compared with the broadcast receiving apparatus 100 of the first embodiment.

  The digital interface unit 40125 is an interface that outputs or inputs encoded digital video data and / or digital audio data. The digital interface unit 40125 can output the MMT data sequence obtained by demodulating by the tuner / demodulation unit 131, the MMT data sequence acquired via the LAN communication unit 121, or the mixed data of each MMT data sequence as it is. Shall. Further, the MMT data string input from the digital interface unit 40125 may be controlled to be input to the separation unit 132.

  Output of digital content stored in the storage (storage) unit 110 or storage of digital content in the storage (storage) unit 110 may be performed via the digital interface unit 40125. The digital interface unit 40125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and is in a format compliant with the DVI specification, the HDMI specification, the Display Port specification, or the like. The video data and audio data output from the audio synthesis unit 164 may be controlled to be output.

  The transcode processing unit 40181 is a signal processing unit that performs a transcode calculation process for converting the encoding format, bit rate, media transport system, and the like of each component that constitutes content. For example, the transcode processing unit 40181 converts the MMT data string of the broadcast program content including the MPEG-H HEVC format video component output from the separation unit 132 into the MPEG-2 or MPEG-4 AVC (Advanced Video Coding) format. It is assumed that the program content including the video component can be converted into an MPEG2-TS data string (or an MPEG2-PS data string) or the like.

  In addition, it is possible to perform processing for changing only the bit rate without changing the component encoding format or the media transport system. The program content subjected to the transcode calculation process can be stored in the storage (accumulation) unit 110 as recorded content, or output from the digital interface unit 40125 or the like and supplied to an external monitor device or the like. Suppose that

[Broadcast receiving device software configuration]
FIG. 35B is a software configuration diagram of the broadcast receiving device 40100 of the present embodiment, and shows a software configuration in the ROM 103, the RAM 104, and the storage (storage) unit 110. Compared to the software configuration diagram (see FIG. 7D) of the broadcast receiving apparatus 100 according to the first embodiment, a transcode processing program 41003 and a recording / playback processing program 41004 are added to the storage (storage) unit 110.

  The transcode processing program 41003 and the recording / reproduction processing program 41004 stored in the storage (accumulation) unit 110 are respectively expanded in the RAM 104, and the main control unit 101 executes the expanded transcode processing program and recording / reproduction processing program. Thus, a transcode processing execution unit 41103 and a recording / playback processing execution unit 41104 are configured. The transcode processing execution unit 41103 mainly controls the transcode operation processing in the transcode processing unit 40181. The recording / playback processing execution unit 41104 mainly controls the recording processing of the content of the broadcast program in the content storage area 1200 and the playback processing of the recorded content from the content storage area 1200.

  The reception function execution unit 1102 expanded in the RAM 104 further includes an output control unit 41102i. The output control unit 41102i of the reception function execution unit 1102 controls each process related to data output from the video output unit 163, the audio output unit 166, and the digital interface unit 40125.

  Note that the software configuration shown in FIG. 35B is merely an example, and in the present embodiment, it is not necessary to provide all the illustrated programs and execution units.

[Interface configuration of broadcast receiver and monitor]
FIG. 36 is a system configuration diagram showing an example of an interface configuration between the broadcast receiving device 40100 and the monitor device 40300. In the present embodiment, a connection terminal of the broadcast receiving device 40100 side where the digital interface unit 40125 is omitted and a connection terminal of the monitor device 40300 side where the digital interface unit is omitted are connected by the connection cable 40200. explain. Note that the monitor device 40300 may have the same configuration as the broadcast receiving device 100 shown in FIG. 7A. In this case, the digital interface unit 125 corresponds to the above-described digital interface unit on the monitor device 40300 side, and the connection cable 40200 is connected to the connection terminal.

  As shown in FIG. 36, the connection cable 40200 includes an n-pair differential transmission lane of CH1 to CHn, a DDC (Display Data Channel) standardized by VESA (Video Electronics Standard Association), and an HPD (Hot Plug Detect). ) Line, CEC (Consumer Electronics Control) line, and the like. The differential transmission lane may be referred to as a differential transmission line.

  The n pairs of differential transmission lanes may be one pair of clock lanes and (n−1) pairs of data lanes. For example, n = 4 and one pair of clock lanes and three pairs of data lanes may be used, or n = 2 and one pair of clock lanes and one pair of data lanes may be used. Further, all of the n pairs of differential transmission lanes may be data lanes for transmitting data on which a clock is superimposed. For example, n = 4 and four pairs of data lanes may be used. The clock lane and the data lane may be referred to as a clock line and a data line, respectively.

  In the data lane, digital video (R / G / B / Vsync / Hsync, Y) is transmitted from the video synthesis unit 161 and the voice synthesis unit 164 via the transmission processing unit 40125b of the digital interface unit 40125 on the broadcast receiving device 40100 side. / Pb (Cb) / Pr (Cr), etc.) / Audio signals, other control signals, etc. may be output in a predetermined format. The predetermined format may conform to a specification such as HDMI (registered trademark), and detailed description thereof will be omitted. The digital video / audio signals and other control signals are received by the reception processing unit 40325b of the digital interface unit on the monitor device 40300 side, and image quality adjustment and volume adjustment are performed by the video processing unit and audio processing unit (not shown). Necessary processing is appropriately performed, and the data is output from the display unit and the speaker of the monitor device 40300.

  Further, the connection cable 40200 is not shown, but may further include a power line, a GND line, and a spare line. The n pairs of differential transmission lanes and communication lines may be shielded by a GND line. All or a part of the spare line, the DDC line, the HPD line, and the CEC line may be used as a part of a communication line that performs network communication. For example, the spare line and the HPD line may constitute one transmission line and one reception line of the communication line, or one pair of transmission / reception lines. The CEC line or the like may be omitted. The DDC line may be used as an I2C (I-squared-C) communication line between the main control unit 101 of the broadcast receiving device 40100 and the main control unit (not shown) of the monitor device 40300.

  The transmission processing unit 40125b of the digital interface unit 40125 on the broadcast receiving device 40100 side communicates with the reception processing unit 40325b of the digital interface unit on the monitor device 40300 side via the DDC line. It is assumed that the display identification data) can be read. That is, the broadcast receiving apparatus 40100 can grasp the display performance of the monitor apparatus 40300 by acquiring the EDID.

  In this embodiment, the display performance refers to the input resolution and frame rate that can be supported by the monitor device 40300, the video standard, whether or not it can support 3D video display, or the monitor device 40300 can expand the HDR or color gamut. It is assumed that items such as whether or not the processing corresponding to the above can be performed.

  In the present embodiment, the following description will be given by taking the process of acquiring the EDID as an example for the broadcast receiving device 40100 to grasp the display performance of the monitor device 40300. However, the information to be acquired is not limited to EDID. For example, information that is different from EDID and that identifies performance identification information that identifies the display performance and function of the monitor device 40300 may be acquired. Further, the display performance of the monitor device 40300 may be grasped by means other than acquiring the performance identification information.

  In addition, the transmission control unit 40125a of the digital interface unit 40125 on the broadcast receiving device 40100 side controls the transmission processing unit 40125b, and that the monitor device 40300 is connected via the HPD line and the power source of the monitor device 40300. It is possible to detect that is turned on. In addition, it is assumed that the transmission control unit 40125a of the digital interface unit 40125 on the broadcast receiving device 40100 side can perform processing for turning on the power of the monitor device 40300 through the CEC line or the like. The reception control unit 40325a of the digital interface unit on the monitor device 40300 side also controls the reception processing unit 40325b.

  Note that the configuration of the connection cable 40200 shown in FIG. 36, the internal configuration of the digital interface unit 40125 of the broadcast receiving device 40100, and the internal configuration of the digital interface unit of the monitor device 40300 are merely examples, and may be different configurations. .

[Parameters for mastering information]
Also in the present embodiment, as in the third embodiment, the content information descriptor shown in FIG. 29A is transmitted as control information related to the program content together with the above-described MMT-SI messages / tables / descriptors. Shall be. On the other hand, the broadcast receiving apparatus 40100 according to the present embodiment does not include a monitor unit or a speaker that finally provides a video signal or an audio signal to the user, and is encoded video to the monitor apparatus 40300 via the connection cable 40200. / Audio data and the like are transmitted, and the video signal and audio signal are provided from the monitor device 40300 to the user. That is, processing such as color gamut conversion processing and luminance adjustment processing described in the third embodiment is performed on the monitor device 40300 side according to the display performance of the display unit of the monitor device 40300.

  The broadcast receiving apparatus 40100 according to the present embodiment receives the content information descriptor from a broadcast wave and enables each parameter described in the received content information descriptor to enable the processes on the monitor apparatus 40300 side. Is appropriately selected and has a function of transmitting to the monitor device 40300 via the connection cable 40200 as mastering information in a predetermined format. For example, the connection cable 40200 is an HDMI (registered trademark) cable, and video data, audio data, other control signals, and the like output from the digital interface unit 40125 are in a format compliant with the HDMI (registered trademark) specification. The mastering information may be output as a part of the other control signals.

  FIG. 37 shows a list of parameters transmitted from the broadcast receiving apparatus 40100 of this embodiment to the monitor apparatus 40300 as mastering information.

  “Source_primaries_R [x, y]”, “source_primaries_G [x, y]”, and “source_primaries_B [x, y]” are parameters indicating information on the color reproduction performance of the source device, and can be supported by the source device. The color gamut is indicated by coordinate values on the CIE chromaticity diagram of each primary color of R (red) / G (green) / B (blue). “Source_primaries_rx”, “source_prime_r”, “source_prime_gx”, “source_prime_gx”, “source_prime_gx”, “source_prime_gx”, “source_prime_gx”, “source_prime_gx” ] ”,“ Source_primaries_G [x, y] ”,“ source_primaries_B [x, y] ”parameters.

  “White_point_x, y” is a parameter indicating information on the color reproduction performance and the like of the source device, and indicates a coordinate value on the CIE chromaticity diagram of a white reference point that can be supported by the source device. The “source_white_point_x” and “source_white_point_y” parameters described in the content information descriptor may be selected and output as the “white_point_x, y” parameters of the mastering information.

“Max_source_mastering_luminance” is a parameter indicating information on the maximum luminance that can be supported by the source device. The value is in the range of “1 (cd / m ² : candela / square meter)” to “65535 (cd / m ² )”. The “source_luminance_max” parameter described in the content information descriptor may be selected and output as the “max_source_mastering_luminance” parameter of the mastering information.

“Min_source_mastering_luminance” is a parameter indicating information on the minimum luminance that can be supported by the source device. The value is in the range of “0.0001 (cd / m ² )” to “6.5535 (cd / m ² )”. The “source_luminance_min” parameter described in the content information descriptor may be selected and output as the “min_source_mastering_luminance” parameter of the mastering information.

“Maximum_Content_Light_Level” is a parameter indicating the maximum luminance in the content. The value is in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”. The “max_light_level_of_content” parameter described in the content information descriptor may be selected and output as the “Maximum_Content_Light_Level” parameter of the mastering information.

“Maximum_Frame-average_Light_Level” is a parameter indicating the maximum value of the average frame luminance within the content. The value is in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”. The “max_frame_ave_light_level” parameter described in the content information descriptor may be selected and output as the “Maximum_Frame-average_Light_Level” parameter of the mastering information.

  “Light Level Status” is a 2-bit flag signal, and represents the status of the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter.

  When the value of this flag is “00b”, the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter indicate the maximum luminance and the maximum value of the frame average luminance throughout the entire content. When the value of this flag is “01b”, the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter indicate the maximum luminance and the maximum value of the frame average luminance for each scene (chapter).

  When the value of this flag is “10b”, it indicates that the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter are omitted. Instead of setting the value of this flag to “10b”, the value of the “Maximum_Content_Light_Level” parameter and the value of the “Maximum_Frame-average_Light_Level” parameter may be set to “0”.

  The parameters described above are transmitted as mastering information by the broadcast receiving apparatus 40100 of the present embodiment to the monitor apparatus 40300 via the connection cable 40200, so that the monitor apparatus 40300 transmits the code transmitted from the broadcast receiving apparatus 40100. It is possible to perform processing such as color gamut conversion processing and luminance adjustment processing according to the display performance of the display unit of the monitor device 40300 on the converted video / audio data. Each parameter of the mastering information described above may further include another parameter different from each parameter illustrated in FIG. 37, or may not include all the parameters. Further, different names may be used for the respective parameters.

[Mastering information generation processing of broadcast receiving device]
In the present embodiment, when the “content_type” parameter of the content information descriptor is “2” or “3”, the video content is content data (such as a live broadcast program) output from the photographing device 390c, and The content information descriptor does not have a “max_light_level_of_content” parameter and a “max_frame_ave_light_level” parameter. That is, in a live broadcast program or the like, the maximum luminance and the maximum average luminance throughout the content are not fixed until the end of the program content.

  In this case, the broadcast receiving apparatus 40100 according to the present embodiment outputs mastering information by setting the values of the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter to “0”, respectively. Alternatively, the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame_average_level parameter” may be replaced by the “Maximum_Content_Light_Level” parameter and the “max_light_level_of_frame” parameter and the “frame_average_light_level” parameter of the content information descriptor.

  On the other hand, when the video content is recorded in the content storage area 1200 of the storage (storage) unit 110, the broadcast receiving apparatus 40100 may create the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter. That is, by performing the video content recording process, the broadcast receiving device 40100 can scan the video content from the start to the end, and accordingly, the maximum luminance and the maximum value of the average luminance throughout the content. This is because it is possible to determine.

  When the video content recorded in the content storage area 1200 of the storage (accumulation) unit 110 by the recording process is output from the digital interface unit 40125 to the monitor device 40300 via the connection cable 40200 by the reproduction process, the broadcast receiving device 40100 is used. Is controlled to output the maximum luminance and the maximum average luminance throughout the content created by scanning the video content from the start to the end as the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter. You can go. That is, in the case of video content that has undergone recording processing, all parameters of the mastering information can be output to the monitor device 40300 regardless of the value of the “content_type” parameter of the content information descriptor. .

[Mastering information output control of broadcast receiver]
Each parameter of the above-described mastering information may be constantly output to the monitor device 40300 connected via the connection cable 40200. Alternatively, the transmission processing unit 40125b of the digital interface unit 40125 on the broadcast receiving device 40100 side refers to the EDID acquired from the EDID storage unit 40325c of the monitor device 40300, and the monitor device 40300 can perform processing corresponding to HDR or color gamut expansion. Only when it is understood that, each parameter of the mastering information may be output to the monitor device 40300 via the connection cable 40200. Alternatively, only when the content information descriptor indicates that the video content of the broadcast program is a program that supports HDR, each parameter of the mastering information is monitored via the connection cable 40200. You may make it output to 40300.

Note that when the content information descriptor indicates that the video content of the broadcast program corresponds to HDR, the “content_type” parameter of the content information descriptor is “1”. In the case of “3”, when the “HDR_flag” parameter of the content information descriptor indicates HDR compatibility of the video content of the broadcast program, the “source_luminance_max” parameter, the “max_light_level_of_content” parameter, When all or any of the “max_light_level_of_frame” parameters etc. exceeds a predetermined value (for example, “100 (cd / m ² )”, etc.).

  The output of each parameter of the mastering information may be controlled according to the interface type of the digital interface unit 40125. For example, when the interface type of the digital interface unit 40125 is an HDMI interface, control is performed so that each parameter of the mastering information is output, and when the interface type is a DVI interface, the parameters of the mastering information are not output. Control, etc.

  Alternatively, the output of each parameter of the mastering information may be controlled according to the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side and the interface type of the digital interface unit on the monitor device 40300 side. For example, when both the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side and the interface type of the digital interface unit on the monitor device 40300 side are HDMI interfaces, control is performed so as to output each parameter of the mastering information. Even if the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side is an HDMI interface, the interface type of the digital interface unit on the monitor device 40300 side is not an HDMI interface (for example, a DVI interface, a Display Port interface, or the like). In this case, that is, when the connection cable 40200 is an interface conversion cable) Performs control so as not to output over data, and the like.

  Further, in the case where the digital interface unit 40125 includes a first digital interface terminal and a second digital interface terminal, data output from any of the first digital interface terminal and the second digital interface terminal. Control may be performed so that the format of the data to be output varies depending on whether it is performed. In this case, each of the digital interface terminals has the configuration shown in FIG. 36 or other configurations.

  For example, when the first digital interface terminal is an HDMI interface and the second digital interface is not an HDMI interface, when data is output from the first digital interface terminal, a video signal, an audio signal, When generating output data including the mastering information and outputting data from the first digital interface terminal, and outputting data from the second digital interface terminal, the video data and audio signals are included. The output data generation process and the data output process may be controlled such that output data not including mastering information is generated and data is output from the second digital interface terminal.

  As described above, according to the broadcast receiving apparatus 40100 of the present embodiment, the mastering information is transmitted together with the encoded video / audio data to the monitor apparatus 40300, so that the color gamut conversion process and the brightness adjustment process on the monitor apparatus 40300 side are performed. Can be suitably executed. That is, it is possible to provide a broadcast receiving apparatus that can execute a function with higher added value.

(Example 5)
Hereinafter, Example 5 of the present invention will be described. The configuration, effects, and the like in this example are the same as those in Example 4 unless otherwise specified. For this reason, below, the difference between a present Example and Example 4 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible.

[System configuration]
FIG. 38 is a system configuration diagram illustrating an example of a broadcast communication system including the broadcast receiving apparatus of the present embodiment. The broadcast communication system of FIG. 38 has the same configuration as the broadcast communication system of FIG. 34, but the output destination to which the broadcast receiving device 40100 outputs content is changed to the monitor device 40300 and the external video processing device 50300 is used. . This means that the content output destination includes a video playback device such as a recorder in addition to the display device. Furthermore, in the broadcast communication system including the broadcast receiving apparatus of the present embodiment, it is transmitted together with the content received by the broadcast receiving apparatus 40100 via the broadcast tower 300t, the broadcast satellite (or communication satellite) 300s, and the broadcast station server 300. The control information is referred to as “reception control information”. This includes various control information described in the first embodiment and additional control information described in the present embodiment. Furthermore, in the broadcast communication system including the broadcast receiving apparatus of this embodiment, when the broadcast receiving apparatus 40100 outputs the content to the external video processing apparatus 50300 via the network via the router apparatus 200r, the control information transmitted together with the content is “output”. This is referred to as “control information”.

  Since the hardware configuration of the broadcast receiving device, the software configuration of the broadcast receiving device, the interface configuration of the broadcast receiving device and the monitor device, and the like are the same as those in the fourth embodiment, the description thereof will be omitted.

  35A, by configuring the digital interface unit 40125 using the hardware of the LAN communication unit 121, the digital interface unit 40125 can be output to an output destination on the network. Here, the output of the digital interface unit 40125 is not limited to the MMT data sequence, but may be an MPEG2-TS data sequence (or MPEG2-PS data sequence) transcoded from the MMT data sequence by the transcode processing unit 40181. This is an example configured as the “IP interface” described in the first embodiment.

  Here, in the broadcast communication system of FIG. 38, when the broadcast receiving device 40100 outputs the content to the external video processing device 50300 via the network via the router device 200r, the broadcast receiving device 40100 receives the content via the IP interface. Is output to the external video processing apparatus 50300.

  As described in the third and fourth embodiments of the present invention, in the broadcast communication system of the present embodiment, not only the SDR video content having a resolution of 1920 × 1080 pixels or less, but also the content exceeding the resolution of 1920 × 1080 pixels, High-definition content such as HDR video content can be transmitted. Here, the content protection when the receiver re-outputs these high-definition video contents broadcasted by the broadcast communication system to the external device via the interface is higher than the content of the SDR video having a resolution of 1920 × 1080 pixels or less. Content protection is required.

  In order to realize this, content protection by DTCP2 (described in Reference 1), which is a more advanced content protection system than DTCP-IP, has been developed as an interface transmission technique.

  [Reference 1: Digital Transmission Licensing Administrator DTCP2 Presentation to CPTWG January 27, 2016]

  Specifically, four flags (“L2-Only” Flag, “EI” Flag, “HDR” Flag, and “SDO” Flag) shown in FIG. 39 are newly prepared in DTCP2. For example, if the “L2-Only” Flag in FIG. 39 is “0”, it indicates that “DTCP-IP (L1 level content protection) or DTCP2 (L2 level content protection) can apply any content protection”. Yes, “1” indicates that “higher level content protection than DTCP-IP (L1 level content protection) is required (for example, L2 level content protection such as DTCP2)”. Note that DTCP-IP (L1 level content protection) is referred to as “DTCP1” in order to distinguish it from “DTCP2” in the following description. If the “EI” flag is “0”, it indicates that “the content is“ Non-Enhanced Image ””, and if “1”, the “content is“ Enhanced Image ””. ". Here, “Enhanced Image” means a color space (for example, BT.2020, SMPTE2084, etc.) that has a pixel number exceeding 1920 × 1080 or exceeding an HD level color space (SDR, such as BT.709). ). The “Non-Enhanced Image” is an image of HD image quality or less (for example, an image having a pixel number of 1920 × 1080 or less and an HD level color space (SDR such as BT.709)). Means content with video. If the “HDR” Flag is “0”, it indicates that “the content of the video may be converted from HDR to SDR”, and if it is “1”, “HDR to SDR conversion”. Is a prohibited video content ". If “SDO” Flag is “0”, “If Enhanced Image”, it cannot be output again unless L2 level content is protected, but “Enhanced Image” is converted to “Non-Enhanced Image”. Indicates that re-output is possible with L1 level content protection. If it is “1”, it means “L2 level regardless of whether the content is“ Enhanced Image ”or“ Non-Enhanced Image ”. It can be output again with both content protection and L1 level content protection ”.

  When the above-described content protection by DTCP2 is to be applied to the IP interface output of this embodiment, it becomes a problem which flag should be attached to which content as the output control information 50200 in FIG. For example, there may be an idea that flags substantially corresponding to the four flags in FIG. 39 are also prepared on the reception control information 50100 side in FIG. In this way, the server of the broadcasting station can substantially be a DTCP2 sink device. However, the above four flags have 1 bit each, and if these flags can be freely set for the purpose of the broadcasting station side or production side, considering all combinations of the four flags, That is, there are 16 types of content protection states, which are very complicated. This has to be said to be unsuitable for “broadcasting” technology in which a large number of viewers simultaneously receive and the program starts and ends repeatedly in the selected service. The number of viewers targeted by the “broadcasting” technology is enormous, and the monitors and the like that viewers have are various. For example, when a monitor of some viewers is not compatible with HDR, content protection control using a flag makes it impossible to view the content at all by those viewers. It is a situation that you want to avoid as much as possible. In addition, in order to popularize receiving devices, content transmitted by “broadcasting” technology needs to have a simple type system and be easily understood by many viewers.

  Also, if a new flag is prepared in the reception control information 50100, the content production side equipment becomes complicated.

  In consideration of the above, in the broadcast communication system of the present embodiment, flags substantially corresponding to the above four flags of DTCP2 are not introduced as they are into the reception control information 50100 of FIG. In addition, when the IP interface is output from the broadcast receiving apparatus 40100, the DTCP2 flag is used as the output control information 50200 to perform more suitable content protection. Specifically, in the broadcast communication system of the present embodiment, as the reception control information 50100, information on the resolution of video of content, control information on digital copy of content, control information on storage and output of content, and the third embodiment, EOTF identification information (transfer characteristic identification information) described in Section 4 is used, and the broadcast receiving device 40100 outputs each IP content including the addition of the DTCP2 flag according to the information when outputting the IP interface. Output protection shall be determined.

  Here, the video resolution information of content used as one of the reception control information 50100 will be described. A plurality of types of information regarding the resolution of the content video are transmitted in the broadcast communication system of the present embodiment. The broadcast receiving apparatus 40100 may determine the resolution (number of pixels) of the content video using any of these plural types of information. For example, the encoding parameter stored in the HEVC encoded stream that is the video encoding method of the content of the broadcasting system of the present embodiment may be obtained and determined. Alternatively, the encoding parameter described in the MH-HEVC video descriptor arranged in the MPT may be acquired and determined. Alternatively, it may be determined by acquiring video resolution information described in the video component descriptor.

  Next, control information related to digital copying of content and control information related to content accumulation and output used as one of the reception control information 50100 will be described. FIG. 40 shows descriptors related to control information related to digital copy of content transmitted in the broadcast communication system of the present embodiment and control information related to content storage and output. Here, the content copy control descriptor stores control information related to digital copy of content, information indicating a maximum transmission rate, or the like. The content usage control descriptor stores information describing control information related to content accumulation and output. The content copy control descriptor and the content usage control descriptor are transmitted in the MPT, for example.

  FIG. 41A shows an example of the data structure of the content copy control descriptor in the broadcasting system of the present embodiment. The “digital_recording_control_data” parameter in the figure is digital copy control information, and indicates information for controlling the copy generation of the content. FIG. 41B shows an example of parameter values of the digital copy control information and their meanings. For example, when the parameter is “00”, it indicates “copying is possible without restriction conditions (synonymous with“ unlimited copying is possible ”)”, and when the parameter is “01”, definition by the operator is possible. Yes, when the parameter is “10”, “only one generation can be copied” is indicated, and when the parameter is “11”, “copy prohibited” is indicated. Only when the parameter is “00” and “copy is possible without constraint” is indicated, it can be said that protection by the digital copy control information is not designated. When the parameters are “01”, “10”, and “11”, it can be said that some protection by the digital copy control information is designated.

  FIG. 42 shows an example of the data structure of the content usage control descriptor in the broadcasting system of this embodiment. The “copy_restriction_mode” parameter in the figure indicates the copy restriction mode, and indicates whether or not the number-limited copy is possible (corresponding to “predetermined number of copies allowed in the first embodiment”). The value of the “encryption_mode” parameter of the content use control descriptor shown in FIG. 42 is used for protection (encryption) control when outputting the IP interface. When the value of the “encryption_mode” parameter indicates “0” indicating that protection is required (encryption is required), encryption processing is performed when content is output, and the value is “1” and protection is not required. If it indicates that (encryption is not required), the content may be output without performing protection (encryption processing).

  The combination of the “digital_recording_control_data” parameter of the content copy control descriptor, the “encryption_mode” parameter of the content usage control descriptor, and the “copy_restriction_mode” parameter of the content usage control descriptor described above is the “copy” described in the first embodiment. It is a specific configuration example of “control information”.

  The broadcast receiving apparatus 40100 according to the present embodiment acquires the “digital_recording_control_data” parameter of the above-described content copy control descriptor, the “copy_restriction_mode” parameter of the content usage control descriptor, and the like, and determines the output protection of the content of the IP interface output. It may be used for judgment.

  Next, since the details of the EOTF identification information used as one of the reception control information 50100 have already been described in the third and fourth embodiments, the description thereof will be omitted. Furthermore, the broadcast receiving apparatus 40100 according to the present embodiment uses not only the EOTF identification information as the reception control information 50100 but also the presence / absence or result of the resolution conversion processing of the content video in the broadcast receiving apparatus 40100, or the third and fourth embodiments. The content output protection of the IP interface output may be determined using the presence / absence or result of the transfer characteristic conversion process described above, the presence / absence of the content accumulation process, or the state after the accumulation.

[Processing for determining output protection of IP interface output content in broadcast receiving apparatus]
FIG. 43, FIG. 44, and FIG. 45 show an example of determination processing for output protection of IP interface output content in the broadcast receiving apparatus.
First, FIG. 43 shows determination of content output protection when the broadcast receiving apparatus 40100 receives content together with the reception control information 50100 and outputs the IP interface without performing resolution conversion processing or transfer characteristic conversion processing on the content video. The process is shown.

  In FIG. 43, the main control unit 101 of the broadcast receiving apparatus 40100 according to the present embodiment determines content output protection when performing IP interface output based on information included in the reception control information 50100. Specifically, based on the combination of the “digital_recording_control_data” parameter of the content copy control descriptor, the “encryption_mode” parameter of the content usage control descriptor, the video resolution of the received content, and the transmission characteristic (EOTF) identification information, The content output protection when the IP interface is output is determined. Hereinafter, examples of determination in each combination will be described.

[Fig. 43 Combination 1]
In the example of the combination 1 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copying is possible without restriction”, and the “encryption_mode” parameter of the content usage control descriptor is set when the IP interface is output. It indicates that the protection state is “not protected”. In other words, in this case, it can be said that no content copy restriction or output protection is specified by any parameter.

  In this case, even if the content of the video exceeds horizontal 1920 × vertical 1080 pixels (content where either horizontal or vertical exceeds the number of pixels, hereinafter referred to as “more than 2K content”), the resolution is horizontal 1920 × vertical 1080 pixels or less. Whether to output IP interface regardless of content (both horizontal and vertical content equal to or less than the number of pixels, hereinafter referred to as “2K or less content”), transmission characteristic identification information indicating HDR, SDR There is no need to protect the output of the content. Copy control at the time of output is unnecessary (substantially Copy Free), encryption at the time of output is also unnecessary, and naturally it is not necessary to add output control information of DTCP2. However, the content may be output with DTCP1 (“DTCP-IP” described above) or DTCP2 protected. In that case, the copy control state at the time of output may be set to “Copy Free” and encryption may be disabled. Furthermore, when output is performed with DTCP2 protection, output control information may be determined as follows. Set “L2-Only” Flag to 0. The “EI” flag is 0 when the content is 2K or less and the transfer characteristic is SDR, and 1 otherwise. “HDR” Flag shall be 0. The “SDO” Flag is 1. In other words, the protection level of DTCP for IP interface output can be either L1 level or L2 level, copy control is Copy Free, transfer characteristic conversion is not prohibited, and L1 level or L2 level regardless of resolution or transfer characteristic status In any of the protection states, the data is output in a state where re-output is possible. This means that the output is in the lowest protection state among the output control states of the IP interface output in this embodiment.

[Fig. 43 Combinations 2 to 5]
In the example of the combinations 2 to 5 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copying is possible without restriction”, and the “encryption_mode” parameter of the content usage control descriptor is an IP interface output. It shows that the protection state at the time is “protect”.

  In this case, since the “encryption_mode” parameter of the content usage control descriptor specifies that protection is performed when the IP interface is output, output protection using either DTCP2 or DTCP1 is performed in any combination. In this case, the copy control state is “EPN” indicating a state where there is no copy restriction but encryption is required, and encryption protection processing is performed. Here, which level of output protection processing DTCP2 or DTCP1 is to be performed is determined according to the combination of the video resolution of the received content and the transmission characteristic (EOTF) identification information.

  For example, in the combination 5, the video resolution of the received content is a content of 2K or less, and the transfer characteristic (EOTF) identification information is SDR. Since this is so-called HD image quality content, conventional level output protection is sufficient, and output protection using DTCP1 is performed. In this case, naturally, output control information of DTCP2 is not added.

  Further, in the combinations 2, 3, and 4, the condition that the video resolution of the received content is a content exceeding 2K or the transfer characteristic (EOTF) identification information is HDR is satisfied. In this case, since the image quality is higher than the HD image quality, content protection is performed using DTCP2, which is a higher level of output protection than DTCP1. In this case, output control information of DTCP2 added to the output content is determined as follows.

  Here, for the “L2-Only” Flag, the “L2-Only” Flag is set to 0 in any of the combinations 2, 3, and 4. If the “L2-Only” Flag is set to 1, even if the image quality is reduced to HD image quality by performing pixel number conversion or transfer characteristic conversion processing at the output destination device, L2 level content protection such as DTCP2 is performed. Otherwise, re-output is impossible. Depending on the device owned by the viewer, viewing may not be possible (for example, when the device owned by the viewer is not compatible with DTCP2), and this situation is the situation of `` broadcast '' content that many viewers receive simultaneously It is not desirable for protection. This is the reason why the “L2-Only” Flag is set to 0. In the determination of any DTCP2 output control information in the following description of this embodiment, the “L2-Only” Flag is set to 0 in principle for the same reason. However, as a modification, when the broadcast content or the broadcast service is divided into “free broadcast” and “paid broadcast” and can be identified by the broadcast receiving device 40100, “L2-Only” is set for “free broadcast”. The flag may be set to 0, and “L2-Only” Flag may be set to 1 for “paid broadcasting”. This is because the viewers of “paid broadcast” are limited, and a particularly high protection level is required for the content of “paid broadcast”.

  For the “EI” Flag, the “EI” Flag is 1 in any of the combinations 2, 3, and 4. This is because the video content resolution of the received content is a content exceeding 2K or the transfer characteristic (EOTF) identification information is HDR.

  For the “HDR” Flag, in the combinations 2 and 3, the “HDR” Flag is 0. In these combinations, the transfer characteristic (EOTF) identification information is HDR, and if it is output as it is, the transfer characteristic of the content when the IP interface is output is also HDR. Here, if the “HDR” Flag is set to 1, it becomes impossible to perform transfer characteristic conversion processing on the output destination device and convert it to SDR content. In this case, there is a possibility that viewing may be impossible depending on the device owned by the viewer (for example, when the device held by the viewer does not support HDR content). This situation is undesirable for protection of “broadcast” content that many viewers receive simultaneously. This is the reason why the “HDR” Flag is set to 0. In the determination of any DTCP2 output control information in the following description of this embodiment, the “HDR” Flag is set to 0 for the same reason. However, as a modification, when the broadcast content or the broadcast service is divided into “free broadcast” and “paid broadcast” and can be identified by the broadcast receiving device 40100, “HDR” Flag is set for “free broadcast”. “HDR” Flag may be set to 1 for “paid broadcasting”. This is because the viewers of “paid broadcast” are limited, and there are service providers who believe that the content of “paid broadcast” is worth viewing with high-quality HDR image quality.

  As for the “HDR” Flag, in the combination 4, the transfer characteristic (EOTF) identification information is SDR, and if it is output as it is, the transfer characteristic of the content when the IP interface is output is also SDR. Therefore, it is not necessary to add an “HDR” Flag indicating whether or not the transfer characteristic conversion processing of HDR content to SDR is possible.

  For the “SDO” Flag, the “SDO” Flag is 0 in any of the combinations 2, 3, and 4. As long as the protection at the time of IP interface output is specified by the “encryption_mode” parameter of the content usage control descriptor, it is desirable that content with a resolution exceeding 2K or content with transfer characteristics of HDR be protected at a high protection level. On the other hand, in "broadcasting" technology that assumes that many viewers receive simultaneously, we want to avoid situations where some viewers who use devices that do not support L2 level content protection cannot view content at all. . Here, if the “SDO” Flag is set to 0, content with a resolution exceeding 2K and content with transfer characteristics of HDR can be protected at a high L2 level, while content can be protected by resolution conversion processing and transfer characteristics conversion processing. When the image quality is reduced to HD, content protection at the conventional DTCP-IP level (L1 level) with many compatible devices is allowed, so this two requirements for output protection processing of content received by “broadcasting” technology. Consistent with one requirement. This is the reason why the “SDO” Flag is set to 0. In the determination of any DTCP2 output control information in the following description of the present embodiment, the copy restriction and content output protection are controlled by the “digital_recording_control_data” parameter of the content copy control descriptor and the “encryption_mode” parameter of the content usage control descriptor. If it is specified, or if the content storage processing status indicates copy restriction or content output protection, “SDO” Flag is set to 0 for the same reason.

[Fig. 43 Combinations 6 to 9]
In the examples of the combinations 6 to 9 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates that “only one generation can be copied”. In this case, since it is specified that there is a copy restriction, it is desirable to protect the content even when the IP interface is output, regardless of the value of the “encryption_mode” parameter of the content usage control descriptor. Therefore, output protection is performed by either DTCP2 or DTCP1. In this case, the copy control status is “Copy One Generation” indicating that only one generation can be copied, and encryption protection processing is performed.

  Here, (1) what level of DTCP2 or DTCP1 output protection processing is performed, and (2) determination of output control information when DTCP2 performs output protection processing, It is determined according to a combination of resolution and transfer characteristic (EOTF) identification information. However, these determination methods in the combinations 6, 7, 8, and 9 in FIG. 43 are the same as those in the combinations 2, 3, 4, and 5 in FIG.

[Fig. 43 Combinations 10 to 13]
In the examples of combinations 10 to 13 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copy prohibited”. In this case, since it is specified that there is a copy restriction, it is desirable to protect the content even when the IP interface is output, regardless of the value of the “encryption_mode” parameter of the content usage control descriptor. Therefore, output protection is performed by either DTCP2 or DTCP1. In this case, the copy control state is “Copy Never” indicating copy prohibition, and encryption protection processing is performed.

  Here, (1) what level of DTCP2 or DTCP1 output protection processing is performed, and (2) determination of output control information when DTCP2 performs output protection processing, It is determined according to a combination of resolution and transfer characteristic (EOTF) identification information. However, these determination methods in the combinations 10, 11, 12, and 13 in FIG. 43 are the same as those in the combinations 2, 3, 4, and 5 in FIG.

  According to the content output protection determination process in the case of performing the IP interface output of FIG. 43 described above, the content is received together with the reception control information 50100, and the video of the content is not subjected to the resolution conversion process or the transfer characteristic conversion process. When performing IP interface output, it is possible to realize a balanced content output protection from both the viewpoint of output protection with respect to the image quality of the content video and the viewpoint of convenience of viewers of the broadcast content.

Next, FIG. 44 illustrates determination of content output protection when the broadcast receiving apparatus 40100 receives content together with the reception control information 50100 and performs resolution conversion processing and transfer characteristic conversion processing on the content video to perform IP interface output. The process is shown.
In the example of FIG. 44, the broadcast receiving apparatus 40100 of this embodiment performs resolution conversion processing and / or transfer characteristic conversion processing on the received content video. The resolution conversion process may be executed by providing a resolution processing unit between the video decoder 141 and the video color gamut conversion unit 142 of the broadcast receiving apparatus 40100 of FIG. 35A. The transfer characteristic conversion process may be executed by the video color gamut conversion unit 142 as already described in the third and fourth embodiments.

  Here, in the example of FIG. 44, since the resolution conversion process and / or the transfer characteristic conversion process of the content video is performed before the IP interface output, only the information included in the reception control information 50100 is appropriate. Cannot determine the protection of the output of various contents.

  Therefore, in addition to the information included in the reception control information 50100, determination of content output protection when performing IP interface output in consideration of the resolution of the video after the resolution conversion process and / or the transfer characteristic after the transfer characteristic conversion process To do. Specifically, instead of “video resolution” of “reception control information” in FIG. 43, an item “output video resolution” of “output state” is provided, and “transfer characteristic identification information” of “reception control information” is provided. In place of (ETOF), an item of “transfer characteristic at output” of “state at output” is provided. The main control unit 101 of the reception control information 50100 determines “output video resolution” of “output state” and “output transfer characteristic” of “output state” based on the following determination.

  First, when the broadcast receiving device 40100 of this embodiment performs resolution conversion processing on the received content video and does not perform transfer characteristic conversion processing, the resolution of the video after the resolution conversion processing is set to “output state” “ The output video resolution is determined, and the transfer characteristic indicated by “transfer characteristic identification information (ETOF)” of “reception control information” may be determined as “output transfer characteristic” of “output state”.

  Further, when the broadcast receiving apparatus 40100 according to the present embodiment performs the transfer characteristic conversion process without performing the resolution conversion process on the received content video, the “video resolution” of the “reception control information” is set to the “output state”. Therefore, it is only necessary to determine the “transmission characteristic at the time of output” in the “output state”.

  Also, when the broadcast receiving apparatus 40100 of this embodiment performs both resolution conversion processing and transfer characteristic conversion processing on the received content video, the resolution of the video after the resolution conversion processing is set to “output state” “output”. It is only necessary to determine “time video resolution” and determine the transfer characteristic after the transfer characteristic conversion process as “output time transfer characteristic” of “output state”.

  In the example of FIG. 44, the broadcast receiving apparatus 40100 of the present embodiment uses the “video resolution at output” of the “output state” and the “transfer characteristic at output” of the “output state” determined by the determination described above. 44, content output protection determination processing is performed when the IP interface output shown in FIG. 44 is performed. However, in FIG. 43 already described, “video resolution” of “reception control information” is read as “video resolution at output” of “output state”, and “transfer characteristic identification information (ETOF)” of “reception control information”. Is replaced with “output transfer characteristic” in “output state”, the control is the same as in the example of FIG. Therefore, the “digital_recording_control_data” parameter of the content copy control descriptor and the “encryption_mode” parameter of the content usage control descriptor of the “reception control information” in FIG. 44, the “output video resolution” and “output time” of the “output state” The IP interface output control in each of the combinations 1 to 13 of “transfer characteristics” includes the “digital_recording_control_data” parameter of the content copy control descriptor and the “encryption_mode” parameter of the content usage control descriptor of “reception control information” in FIG. Since it is the same as the IP interface output control in each of the combinations 1 to 13 of “image resolution” and “transfer characteristic identification information (ETOF)”, Description of the time is omitted.

  According to the content output protection determination process in the case of performing the IP interface output of FIG. 44 described above, the content is received together with the reception control information 50100, and the resolution conversion process and / or the transfer characteristic conversion process is performed on the video of the content. Thus, when IP interface output is performed, it is possible to realize content output protection that is well-balanced in terms of both output protection with respect to image quality of content video and convenience of viewers of broadcast content.

  Next, FIG. 45 shows determination processing for content output protection when the broadcast receiving device 40100 receives content together with the reception control information 50100, performs storage processing on the content, and then performs IP interface output. is there. Since the outline of the accumulation process has already been described in the first embodiment, the description thereof will be omitted.

  First, the broadcast receiving device 40100 uses the “digital_recording_control_data” parameter of the content copy control descriptor included in the reception control information 50100, the “encryption_mode” parameter of the content usage control descriptor, and the “copy_restriction_mode” parameter of the content usage control descriptor. Thus, the accumulation control state of the accumulation target content is determined.

  Here, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates “can be copied without constraint”, and the “encryption_mode” parameter of the content usage control descriptor indicates “not protected” (in combination 1 in FIG. 45) For example, regardless of the value of the “copy_restriction_mode” parameter of the content usage control descriptor, the storage control state is “accumulation without copy restrictions and no encryption_mode protection”.

  Further, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copying is possible without constraint”, and the “encryption_mode” parameter of the content usage control descriptor indicates “protect” (combinations 2 to 5 in FIG. 45). In this example, the storage control state is “accumulation without copy restrictions and encryption_mode protection” regardless of the value of the “copy_restriction_mode” parameter of the content usage control descriptor.

  In addition, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates “only one generation can be copied” and the “copy_restriction_mode” parameter of the content usage control descriptor indicates “only one generation can be copied” (combination 6 in FIG. 45). 9 to 9), the storage control state of “recopy prohibited” is set regardless of the value of the “encryption_mode” parameter of the content use control descriptor.

  Further, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates that “only one generation can be copied” and the “copy_restriction_mode” parameter of the content usage control descriptor indicates that “number limited copy is allowed” (FIG. 45). In the example of combinations 10 to 13, the accumulation control state of “number limited copy allowed” is made possible regardless of the value of the “encryption_mode” parameter of the content use control descriptor.

  In addition, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copy prohibited” (examples of combinations 14 to 17 in FIG. 45), the content can be stored in the “digital_recording_control_data_data” of the content copy control descriptor. The parameter and the content use control descriptor “copy_restriction_mode” indicate any value, but are limited to the “temporary storage” storage control state. Since the outline of “temporary storage” has already been described in the first embodiment, the description thereof is omitted.

  As described above, the broadcast receiving device 40100 includes the “digital_recording_control_data” parameter of the content copy control descriptor, the “encryption_mode” parameter of the content usage control descriptor, and the “copy_restriction_mode” parameter of the content usage control descriptor included in the reception control information 50100. Are used to determine the storage control state of the content to be stored.

  Next, when the stored content is output from the IP interface, the broadcast receiving apparatus 40100, the storage control state of the content, the “video resolution at output” and the “transfer characteristic at output” when the content is output In response to “”, the output protection of the IP interface output content is determined. Here, in the example of FIG. 45, there is a possibility that resolution conversion processing and / or transfer characteristic conversion processing may be performed on content video before and after content storage processing. This is common to the example of FIG. 44 in that resolution conversion processing and / or transfer characteristic conversion processing may be performed before the broadcast receiving device 40100 receives content and outputs it from the IP interface. Therefore, the determination of “output video resolution” and “output transfer characteristic” in the broadcast receiving apparatus 40100 may be performed in the same manner as in the example of FIG.

  Next, determination of content output protection when performing IP interface output in each combination of FIG. 45 will be described.

[Fig. 45 Combination 1]
In the example of the combination 1 shown in FIG. 45, that is, when content in an accumulation control state of “accumulation without copy restrictions and no encryption_mode protection” is output through the IP interface, the content of the same combination as in the combination 1 in FIG. Output control may be performed. Since it will be repeated, the description will not be repeated.

[Fig. 45 Combinations 2 to 5]
In the example of combinations 2 to 5 shown in FIG. 45, that is, when content in an accumulation control state of “accumulation without copy restrictions and encryption_mode protection” is output to the IP interface, combinations 2 to 5 in FIG. Similar output control may be performed. Since it will be repeated, the description will not be repeated.

[Fig. 45 Combinations 6 to 9]
45. In the example of combinations 6 to 9 shown in FIG. 45, that is, when content in the storage control state of “recopy prohibited” is output through the IP interface, the output processing is output for viewing on the output destination device. Or a copy control state at the time of output differs depending on whether the content is moved to an output destination device. Specifically, when the IP interface output is a viewing output, the copy control state is output as “No More Copies” indicating that re-copying is prohibited. If the IP interface output is Move, the copy control status is output as “Move”. In each of the combinations 6, 7, 8, and 9 shown in FIG. 45, the other content protection control at the IP interface output is the same as each of the combinations 6, 7, 8, and 9 shown in FIG. The description will not be repeated.

[Fig. 45 Combinations 10 to 13]
45, each of the combinations 10, 11, 12 and 13, that is, the content protection control in the case where the content in the storage control state of “number limited copy is possible” is output to the IP interface is the combination 6, 7, 8 of FIG. , 9 are substantially the same as the respective examples. The differences are as follows. When content whose storage control status is “recopy prohibited” is output to the IP interface, if the move process is performed once, the broadcast receiving device 40100 needs to disable the playback of the content (until the content is disabled to be played back). The output for viewing is possible any number of times). On the other hand, when the storage control state is “number limited copy is possible”, a plurality of copy processes and finally a move process can be performed once for an output destination device via an IP interface output. For example, as an example, the copy process is performed nine times, and finally the move process can be performed once. In the final move process, the broadcast receiving device 40100 needs to disable the reproduction of the content. Here, the broadcast receiving apparatus 40100 treats each copy process several times as a copy process, and each content of the copy process has a copy control state in the protection process of the IP interface output. Output as “Move”.
That is, in the copy processing of the content in the storage control state “number limited copy is permitted”, a state in which a plurality of the content is stored in advance in the broadcast receiving device 40100 is virtually set, and one of the stored content One is executed as a process of moving via the IP interface output. Here, if a plurality of the same contents are actually stored in advance, the storage state becomes inefficient with respect to the capacity of the storage unit. Therefore, in practice, only one content may be accumulated, and the accumulated number information may be stored and managed in the storage unit or memory unit as management information. This is the meaning of the description “virtually” described above.

  Except for the points described above, the content protection control in the case of the IP interface output in the examples of combinations 10, 11, 12, and 13 in FIG. 45 is the same as the examples of the combinations 6, 7, 8, and 9 in FIG. Therefore, the re-explanation is omitted.

[Fig. 45 Combinations 14 to 17]
45, the content protection control in the case where the content in the storage control state of “temporary storage” is output through the IP interface is the combination 6, 7, 8, 9 in FIG. It is almost the same as each example. The difference is that content in the storage control state of “temporary storage” cannot be moved to another device (move is impossible). The content protection control in the case of outputting the IP interface for the other points is the same as the examples of the combinations 6, 7, 8, and 9 in FIG.

  According to the content output protection determination process in the case of performing the IP interface output of FIG. 45 described above, when the content is received together with the reception control information 50100, the content is accumulated, and the IP interface output is performed, the content of the content is protected. A well-balanced content output protection can be realized from both the viewpoint of output protection with respect to video image quality and the convenience of viewers of broadcast content.

  As described above, according to the broadcast communication system and the broadcast receiving apparatus 40100 of the present embodiment, the control information related to the digital copy of the content and the control information related to the storage and output of the content, the storage state of the content, the resolution of the video of the content, and the content It is possible to perform content output protection control with a good balance in terms of both output protection with respect to image quality of content video and convenience of viewers of broadcast content in accordance with video transmission characteristics and the like. That is, according to the broadcast communication system and the broadcast receiving apparatus 40100 of the present embodiment, it is possible to perform more preferable content output protection control.

  As mentioned above, although the example of embodiment of this invention was demonstrated using Examples 1-5, the structure which implement | achieves the technique of this invention is not restricted to the said Example, Various modifications can be considered. For example, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. These all belong to the category of the present invention. In addition, numerical values, messages, and the like appearing in sentences and drawings are merely examples, and the use of different ones does not impair the effects of the present invention.

  The functions and the like of the present invention described above may be realized by hardware by designing some or all of them, for example, by an integrated circuit. Further, the microprocessor unit or the like may be realized by software by interpreting and executing an operation program that realizes each function or the like. Hardware and software may be used together.

  The software for controlling the broadcast receiving apparatus 100 may be stored in advance in the ROM 103 and / or the storage (storage) unit 110 of the broadcast receiving apparatus 100 at the time of product shipment. It may be acquired from another application server 500 on the Internet 200 via the LAN communication unit 121 after product shipment. Further, the software stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 124 or the like.

  In addition, the control lines and information lines shown in the figure are those that are considered necessary for the explanation, and do not necessarily indicate all the control lines and information lines on the product. Actually, it may be considered that almost all the components are connected to each other.

  100, 800, 40100 ... broadcast receiving device, 100a, 40100a ... antenna, 101, 801 ... main control unit, 102, 802 ... system bus, 103, 803 ... ROM, 104, 804 ... RAM, 110, 810 ... storage unit, 121, 821 ... LAN communication unit, 124, 824 ... Expansion interface unit, 125, 825, 40125 ... Digital interface unit, 131, 831, 832 ... Tuner / demodulation unit, 132 ... Separation unit, 141 ... Video decoder, 142 ... Video Color gamut conversion unit, 143 ... audio decoder, 144 ... character super decoder, 145 ... subtitle decoder, 146 ... subtitle synthesis unit, 147 ... subtitle color gamut conversion unit, 151 ... data decoder, 152 ... cache unit, 153 ... application control unit 154 Browser part, 155 Application Gamut conversion unit, 156... Sound source unit, 161, 861... Video composition unit, 162, 862... Monitor unit, 163, 863 ... video output unit, 164, 864 ... voice synthesis unit, 165, 865. , 866 ... Audio output unit, 170, 870 ... Operation input unit, 40181 ... Transcode processing unit, 841 ... MMT decoding processing unit, 842 ... MPEG2-TS decoding processing unit, 200 ... Internet, 200r ... Router device, 200a ... Access Point, 300t ... Radio tower, 300s ... Broadcast satellite (or communication satellite), 300 ... Broadcast station server, 390c ... Shooting equipment, 390e ... Editing equipment, 400 ... Service provider server, 500 ... Other application servers, 600 ... Move Body phone communication server, 600b ... base station, 700 ... portable information terminal 40200 ... connection cable, 40300 ... monitoring device.

Claims (1)

A broadcast receiving device for receiving content,
A receiving unit for receiving the content;
A video converter that converts the resolution and / or transfer characteristics of the video of the content received by the receiver;
An interface for outputting the content converted by the video conversion unit;
A control unit for controlling the output state of the content from the interface,
The control unit receives control information indicating a copy control state of the content, control information designating necessity of protection at the time of output of the content, and output from the interface, which is received together with the content by the receiving unit. Determining the output state of the content from the interface according to the combination of the video resolution of the content and the transfer characteristics of the content video when output from the interface,
When the control information indicating the copy control status of the content indicates that there is a copy restriction, or when the control information specifying whether or not protection is required when outputting the content indicates protection at the time of output If the content is output from the interface, the output protection is controlled. The output protection level is output from the interface and the video resolution of the content is output from the interface. The broadcast receiving apparatus changes according to a combination of video transmission characteristics of the content.

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