WO2017208854A1

WO2017208854A1 - Reception device, transmission device, and data processing method

Info

Publication number: WO2017208854A1
Application number: PCT/JP2017/018814
Authority: WO
Inventors: 山岸　靖明
Original assignee: ソニー株式会社
Priority date: 2016-06-03
Filing date: 2017-05-19
Publication date: 2017-12-07

Abstract

The present feature pertains to a reception device, a transmission device, and a data processing method with which it is possible to flexibly respond when the configuration of services of a broadcast station has been changed. The reception device receives the content of a service of a channel selected in accordance with channel selection information and controls resetting of the channel selection information on the basis of configuration change information that indicates a change of configuration of services of each broadcast station, thereby enabling a flexible response when the configuration of services of a broadcast station has been changed. The present feature can be applied, for example, to a television receiver that supports ATSC 3.0.

Description

Reception device, transmission device, and data processing method

The present technology relates to a receiving device, a transmitting device, and a data processing method, and in particular, when a service configuration of a broadcasting station is changed, the receiving device, the transmitting device, and the The present invention relates to a data processing method.

When a receiver that can receive terrestrial broadcasting is used for the first time, a so-called initial scan is performed, and channel selection information of services (channels) that can be selected is retained, so that it is possible to select services. (For example, refer to Patent Document 1).

Japanese Patent Laying-Open No. 2015-073244

By the way, if the configuration of a service that can be selected is changed, the change in the service configuration itself is detected unless all the frequencies are scanned again after stopping the selected service. I can't.

Also, if a change in the service configuration cannot be detected, an error will occur when trying to select the service. Therefore, there has been a demand for a proposal for flexibly responding to changes in the configuration of services that could be selected.

The present technology has been made in view of such a situation, and is intended to be able to flexibly cope with a change in the configuration of a broadcasting station service.

The receiving device according to the first aspect of the present technology is based on a receiving unit that receives content of a service that is selected according to channel selection information, and configuration change information that indicates a change in the configuration of the service of each broadcasting station, And a control unit that controls resetting of the channel selection information.

The receiving device according to the first aspect of the present technology may be an independent device, or may be an internal block constituting one device. The data processing method according to the first aspect of the present technology is a data processing method corresponding to the above-described receiving device according to the first aspect of the present technology.

In the reception device and the data processing method according to the first aspect of the present technology, the content of the service selected according to the channel selection information is received, and the configuration change information indicating the change in the configuration of the service of each broadcasting station Based on the above, resetting of the channel selection information is controlled.

A transmission device according to a second aspect of the present technology includes a generation unit that generates configuration change information indicating a change in the configuration of a service of each broadcasting station, and a transmission unit that transmits the generated configuration change information. It is.

The transmission device according to the second aspect of the present technology may be an independent device, or may be an internal block constituting one device. A data processing method according to the second aspect of the present technology is a data processing method corresponding to the transmission device according to the second aspect of the present technology described above.

In the transmission device and the data processing method according to the second aspect of the present technology, configuration change information indicating a change in the configuration of the service of each broadcasting station is generated, and the generated configuration change information is transmitted.

According to the first aspect and the second aspect of the present technology, it is possible to flexibly cope with a change in the configuration of the broadcasting station service.

It should be noted that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

It is a figure which shows the structural example of a transmission system. It is a figure which shows the structural example of the terrestrial broadcasting system to which this technique is applied. It is a figure explaining the CMI metadata transmitted with a broadcast stream. It is a figure which shows the example of a service map database (SMDB-X-1 (at) T1). It is a figure which shows the example of a service map database (SMDB-Y-1 at T2). It is a figure which shows the example of a service selection menu (SSM). It is a figure which shows the example of a change of the structure of the service of a broadcasting station. It is a figure for demonstrating cooperation with a scan trigger generator and a CMI generator. It is a figure which shows the structural example of a terrestrial broadcasting system. It is a figure which shows the example of a service map database (SMDB-X-n | at | T3). It is a figure which shows the example of a service map database (SMDB-Y-n (at) T0). It is a figure which shows the structural example of a terrestrial broadcasting system. It is a figure which shows the example of a service map database (SMDB-X-n | at | T3). It is a figure which shows the example of a service map database (SMDB-Y-n | at | T5). It is a figure which shows the example of a structure of CMI metadata (CMI | for BSID-X-1 | from A). It is a figure which shows the example of a structure of CMI metadata (CMI | for BSID-X-2 | from A). It is a figure which shows the example of a structure of CMI metadata (CMI | for BSID-Y-1 | from A). It is a figure which shows the example of a structure of CMI metadata (CMI | for BSID-Y-1 | from B). It is a figure which shows the example of a structure of CMI metadata (CMI | for BSID-Y-2 | from B). It is a figure which shows the example of the protocol stack of the IP transmission system of this technique. It is a figure which shows the example of the syntax of L1 detailed information. It is a figure which shows the example of the syntax of LMT metadata. It is a figure which shows the example of the syntax of SLT metadata. It is a figure which shows the structural example of a broadcast server and a transmitter. It is a figure which shows the structural example of a client apparatus. It is a flowchart explaining the flow of a transmission process. It is a flowchart explaining the flow of a reception process. It is a flowchart explaining the flow of a process in each apparatus when an update occurs in CMI metadata. It is a flowchart explaining the flow of a process in each apparatus when transmission of CMI metadata stops. It is a flowchart explaining the flow of a process in each apparatus when transmission of CMI metadata is resumed. It is a figure which shows the other structural example of a transmission system. It is a figure which shows the other structural example of a client apparatus. It is a flowchart explaining the flow of a process in each apparatus when an update occurs in CMI metadata. It is a flowchart explaining the flow of a process in each apparatus when transmission of CMI metadata stops. It is a flowchart explaining the flow of a process in each apparatus when transmission of CMI metadata is resumed. It is a figure which shows the structural example of a computer.

Hereinafter, embodiments of the present technology will be described with reference to the drawings. The description will be made in the following order.

1. 1. System configuration Embodiment 3 of the present technology Example syntax 4 4. Configuration and processing flow of each device Modification 6 Computer configuration

<1. System configuration>

(Configuration example of transmission system)
FIG. 1 is a diagram illustrating a configuration of an embodiment of a transmission system to which the present technology is applied. The system refers to a logical collection of a plurality of devices.

1, the transmission system 1 includes a broadcast server 10, a transmission device 20, and a client device 30.

The broadcast server 10 supplies the transmitter 20 with a multiplexed stream including video and audio data of content such as a TV program and CM, and signaling. The broadcast server 10 is provided by a broadcaster such as a broadcast station, for example.

The transmission device 20 modulates the multiplexed stream supplied from the broadcast server 10 and transmits (transmits) it as a broadcast wave to the client device 30 via the broadcast path 40. The transmission device 20 is provided, for example, in a terrestrial broadcast transmission station (transmission station).

The client device 30 receives and demodulates the broadcast wave transmitted from the transmission device 20 via the broadcast path 40. The client device 30 acquires signaling and video and audio data included in the multiplexed stream obtained as a result of demodulation, and reproduces video and audio of content such as a television program and CM.

The client device 30 is, for example, a receiver such as a fixed receiver such as a television receiver or a set top box (STB), or a mobile receiver such as a mobile phone, a smartphone, or a tablet terminal. Further, the client device 30 may be an in-vehicle device mounted on a vehicle.

In the transmission system 1 of FIG. 1, only one client device 30 is shown for simplicity of explanation, but a plurality of client devices 30 can be provided and transmitted by the transmitting device 20 (simultaneous transmission). Broadcast waves to be distributed) are simultaneously received by the plurality of client devices 30 existing at different locations in the same area via the broadcast channel 40.

Also, a plurality of broadcast servers 10 can be provided for each broadcaster, for example. In each of the plurality of broadcast servers 10, a multiplexed stream as a separate service (channel) is generated, and a broadcast wave including the multiplexed stream is transmitted by the transmission device 20 in a separate frequency band. The client device 30 can select a service for receiving the multiplexed stream from among the services of the plurality of broadcast servers 10.

Here, in the transmission system 1, the broadcast channel 40 is a terrestrial broadcast, and data transmission conforming to a predetermined broadcast standard such as ATSC (Advanced Television Systems Committee) 3.0 currently being developed is performed. .

In ATSC 3.0, instead of the currently widely used MPEG2-TS (Transport Stream) method, the IP transmission method that uses IP (Internet Protocol) packets used in the field of communication for digital broadcasting is used. By introducing it, it is expected to provide more advanced services.

In ATSC 3.0, it is assumed that LLS (Low Level Signaling) and SLS (Service Layer Signaling) are used as signaling. LLS signaling is signaling acquired prior to SLS signaling, and SLS signaling is acquired according to information included in LLS signaling. SLS signaling is per-service signaling.

LLS signaling includes metadata such as SLT (Service List Table) and RRT (Rating Region Table). The SLT metadata includes basic information indicating the stream and service configuration in the broadcast network, such as information necessary for channel selection (channel selection information). The RRT metadata includes information about ratings.

SLS signaling includes metadata such as USD (User Service Description), S-TSID (Service-based Transport Session Instance Description), and MPD (Media Presentation Description). The USD metadata includes information such as an acquisition destination of other metadata.

The S-TSID metadata is an extension of LSID (LCT Session Instance Description) for ATSC 3.0, and is control information for the ROUTE (Real-time Object Delivery Service Unidirectional Transport) protocol. Note that ROUTE is a protocol for transferring streaming files, and is an extension of FLUTE (File Delivery over Unidirectional Transport).

MPD metadata is management information of video and audio files used for streaming delivery compliant with MPEG-DASH (Dynamic Adaptive Streaming over HTTP). Here, MPEG-DASH is a streaming distribution standard according to OTT-V (Over The Top Video) and is a standard related to adaptive streaming distribution using a streaming protocol based on HTTP (Hypertext Transfer Protocol).

The MPEG-DASH standard defines a manifest file for describing metadata, which is management information for video and audio files, and a file format for transmitting moving image content. The former manifest file is called MPD (Media Presentation Description). The latter file format is also called a segment format.

Note that LLS signaling including metadata such as SLT and RRT and SLS signaling including metadata such as SLT, USD, S-TSID, and MPD are described in a markup language such as XML (Extensible Markup Language). Text data. On the other hand, the LMT metadata can be binary data.

In ATSC 3.0, it is assumed that LMT metadata (Link Mapping Table) which is LLS (Link Layer Signaling) is used as signaling. The LMT metadata is mapping information in which PLP (Physical Layer Layer Pipe) is associated with an IP address and a port number.

<2. Examples of the present technology>

By the way, when an IP transmission method such as ATSC 3.0 is adopted, address resolution information transmitted (transferred) by signaling is closed and distributed for each frequency band. This address resolution information is, for example, when ATSC 3.0 is adopted, LMT metadata describing mapping information between PLP for each broadcasting station, IP address and port number, and service signaling session for each broadcasting station Corresponds to SLT metadata that describes the IP address and port number.

The client device 30 corresponding to ATSC 3.0 first scans all frequency bands accessible at that time (initial scan) once, and from the resulting signaling, for address resolution as channel selection information Generate and maintain a database (hereinafter referred to as Service Map Database (SMDB)). The client device 30 refers to the service map database when selecting a service, and performs address resolution processing when selecting (tuning) a desired service.

Suppose here that the service configuration (address resolution information) that was registered in the service map database and could be selected was changed. In this case, when there are one or more tuners installed in the client device 30, another service can be executed by performing the initial scan process in parallel with another tuner while selecting a certain service. It is possible to detect a change in the configuration of the address resolution information of (services transmitted in other frequency bands).

However, in the client device 30 such as a television receiver, since it is common to mount one tuner, the address of another service distributed in a frequency band other than the frequency band of the service currently selected is selected. Even if there is a change in the resolution information, it is not possible to detect a change in the configuration of other services (address resolution information) unless the selected service is stopped and all frequencies are scanned again. .

In addition, when the client device 30 cannot detect a change in the configuration (address resolution information) of another service, an error occurs when attempting to select the other service. For this reason, there has been a demand for a proposal to flexibly cope with changes in the configuration of other services that can be selected.

Therefore, in the present technology, the client device 30 acquires information indicating the change in the configuration of the service of each broadcasting station (hereinafter referred to as configuration change information), so that the client device 30 includes the configuration change information. Based on this, the channel selection information is reset. As a result, even when the configuration of other services that can be selected is changed, the channel selection information is updated, so that it is possible to flexibly cope with changes in the configuration of other services. .

That is, in this technology, when a change occurs in address resolution information distributed in a certain frequency band, a signaling extension is proposed to notify the change event. Specifically, the time at which a change in the configuration of one of the services occurs is known in the signaling transmitted over all frequency bands transmitted in the distribution area covered by a certain transmitting station. Like that.

Although details will be described later, this time information (configuration change information) is the signaling (L1 signaling) included in the preamble of the physical layer frame or the signaling stored in the packet obtained by demodulating the physical layer frame (for example, , LMT metadata and SLT metadata).

Then, in the distribution area, the client device 30 receiving any one of those frequency bands performs a rescan (an initial scan again) when detecting a change in the time value due to signaling, It is possible to update the service map database that reflects the change in configuration. However, by placing a message (time information) for notifying an update event according to a change in the configuration of any service on a server on a network such as the Internet, the client device 30 receives the time information from the server. (Configuration change information) may be acquired.

(Configuration example of terrestrial broadcasting system)
FIG. 2 is a diagram illustrating a configuration example of a terrestrial broadcasting system to which the present technology is applied.

In FIG. 2, when two broadcast stations, broadcast station A and broadcast station B, provide a service (channel), a transmission station (base station or relay station) is provided for each of the two broadcast areas of area X and area Y. ) Shows an example in which broadcast waves of each service are transmitted in two frequency bands. However, the frequency band here is specified by the channel frequency (center frequency).

Broadcast station 10A is installed at broadcast station A. Broadcast station A provides service A1 and service A2 (contents thereof) by broadcast server 10A. Here, each service is identified by a service identifier. The service identifier SvcID-A-1 is assigned to the service A1, and the service identifier SvcID-A-2 is assigned to the service A2.

Broadcasting station B is installed with broadcasting server 10B. Broadcast station B provides service B1 and service B2 (contents thereof) by broadcast server 10B. The service identifier SvcID-B-1 is assigned to the service B1, and the service identifier SvcID-B-2 is assigned to the service B2.

In the following description, for convenience of explanation, the broadcast servers 10 provided in the broadcast station A and the broadcast station B are distinguished as the broadcast server 10A and the broadcast server 10B, respectively.

In the transmitting station X, a transmitting device 20X is installed. The transmitting station X broadcasts each service in a predetermined frequency band to the client devices 30-X-1 to 30-Xn (n: an integer of 1 or more) existing in the area X by the transmitting device 20X. Send a wave.

In the transmitting station Y, a transmitting device 20Y is installed. The transmitting station Y uses the transmitting device 20Y to broadcast each service in a predetermined frequency band to the client devices 30-Y-1 to 30-Yn (n is an integer of 1 or more) existing in the area Y. Send a wave.

Specifically, among the services provided by the broadcast station A, the broadcast wave of the service A1 is transmitted at the channel frequency 1 of the area X of the transmission station X, and the broadcast wave of the service A2 is transmitted from the area X of the transmission station X. Are transmitted at the channel frequency 2 of the transmitting station Y and at the same time at the channel frequency 1 of the area Y of the transmitting station Y.

On the other hand, among the services provided by the broadcasting station B, the broadcast wave of the service B1 is transmitted at the channel frequency 2 of the area X of the transmitting station X and at the same time, also transmitted at the channel frequency 2 of the area Y of the transmitting station Y. Then, the broadcast wave of service B2 is transmitted at channel frequency 2 in area Y of transmitting station Y.

Here, an identifier for identifying a set of an area identifier (for example, X or Y) for identifying an area such as area X or area Y and a channel frequency for each area is set as a broadcast stream ID (BSID: Broadcast Stream). ID). For example, the broadcast stream ID of channel frequency 1 in area X is expressed as “BSID-X-1”, and the broadcast stream ID of channel frequency 2 in area Y is expressed as “BSID-Y-2”. This broadcast stream ID is assumed to be a unique value throughout the United States and Canada, for example.

(Detailed configuration of terrestrial broadcasting system)
Next, a more detailed configuration of the terrestrial broadcasting system will be described with reference to FIG. 3 on the assumption of the configuration of the terrestrial broadcasting system shown in FIG.

In FIG. 3, the broadcast server 10A of the broadcasting station A uses the service A1 by the LMT metadata and the SLT metadata transmitted at the channel frequency 1 of the area X identified by BroadcastStream-X-1 (BSID-X-1). Address resolution information is generated and sent out.

In the following description, data transmitted (transferred) using LMT metadata and SLT metadata is generically referred to as CMI (Channel Mapping Information) metadata. Hereinafter, the CMI metadata is also referred to as “CMI”.

That is, in this CMI metadata (“CMI for BSID-X-1 from A” in FIG. 3), PLS (Physical Layer Pipe) -1 (PlpId-1) of BSID-X-1 and SLS of service A1 It is described that the SLS channel for signaling and the audio and video AV channel streams constituting the service A1 flow.

CMI for BSID-X-1 from A
{PlpId-1:
Multicast address / port group for forwarding SvcID-A-1 (SLS, AV)}

The broadcast server 10A of the broadcasting station A generates address resolution information for the service A2 based on CMI metadata transmitted at the channel frequency 2 of the area X identified by BroadcastStream-X-2 (BSID-X-2). And send it out.

That is, in this CMI metadata (“CMI for BSID-X-2 from A” in FIG. 3), PLS-1 (PlpId-1) of BSID-X-2, SLS channel and AV channel of service A2 It is described that a stream flows and a stream of another AV channel of service A2 flows in PLP-2 (PlpId-2) of BSID-X-2.

CMI for BSID-X-2 from A
{PlpId-1:
Multicast address / port group to transfer SvcID-A-2 (SLS, AV),
PlpId-2:
Multicast address / port group for forwarding SvcID-A-2 (AV)}

Further, the broadcast server 10A of the broadcasting station A generates the address resolution information of the service A2 by CMI metadata transmitted at the channel frequency 1 of the area Y identified by BroadcastStream-Y-1 (BSID-Y-1). And send it out.

That is, in this CMI metadata (“CMI for BSID-Y-1 from A” in FIG. 3), PLS-1 (PlpId-1) of BSID-Y-1 and SLS channel and AV channel of service A2 It is described that a stream flows and a stream of another AV channel of service A2 flows in PLP-2 (PlpId-2) of BSID-Y-1.

CMI for BSID-Y-1 from A
{PlpId-1:
Multicast address / port group to transfer SvcID-A-2 (SLS, AV),
PlpId-2:
Multicast address / port group for forwarding SvcID-A-2 (AV)}

On the other hand, the broadcast server 10B of the broadcast station B uses the CMI metadata transmitted at the channel frequency 2 of the area X identified by BroadcastStream-X-2 (BSID-X-2) to obtain the address resolution information of the service B1. Generate and send out.

That is, in this CMI metadata (“CMI for BSID-X-2 from B” in FIG. 3), PLS-3 (PlpId-3) of BSID-X-2, SLS channel and AV channel of service B1 It is described that the stream flows.

CMI for BSID-X-2 from B
{PlpId-3:
Multicast address / port group for forwarding SvcID-B-1 (SLS, AV)}

Also, the broadcast server 10B of the broadcast station B generates address resolution information for the service B2 based on CMI metadata transmitted at the channel frequency 2 of the area Y identified by BroadcastStream-Y-2 (BSID-Y-2). And send it out.

That is, in this CMI metadata (“CMI for BSID-Y-2 from B” in FIG. 3), PLS-1 (PlpId-1) of BSID-Y-2, SLS channel and AV channel of service B2 It is described that a stream flows, and a stream of another SLS channel and another AV channel of service B2 flows in PLP-2 (PlpId-2) of BSID-Y-2.

CMI for BSID-Y-2 from B
{PlpId-1:
Multicast address / port group to transfer SvcID-B-2 (SLS, AV),
PlpId-2:
Multicast address / port group for forwarding SvcID-B-2 (SLS, AV)}

As described above, when a single broadcast stream (Broadcast Stream) is shared by a plurality of broadcast stations, each broadcast station generates and transmits CMI metadata about the service that it has jurisdiction over, It is transmitted in the broadcast stream.

(Initial scan of client device)
On the other hand, the client device 30 existing in each area performs an initial scan, scans a channel frequency that can be received by itself, and provides a service of the channel frequency (central frequency) and CMI metadata transmitted in the frequency band. Generate a map database (SMDB).

For example, the client device 30-X-1 in the area X performs an initial scan at time T1, and performs three CMI metadata (“CMI for BSID-X-1 from A”, “CMI for BSID-” in FIG. 3). X-2 from A ”,“ CMI for BSID-X-2 from B ”), create a service map database (SMDB-X-1 at T1) for area X

FIG. 4 is a diagram showing an example of the service map database (SMDB-X-1 T T1) generated by the client device 30-X-1 at time T1.

In FIG. 4, channel frequency 1 (BSID-X-1) is associated with PLP-1 (PlpId-1) through which the SLS channel and AV channel stream of service A1 (SvcID-A-1) flows. Yes.

Similarly, for channel frequency 2 (BSID-X-2), PLP-1 (PlpId-1) through which the SLS channel and AV channel stream of service A2 (SvcID-A-2) flows and service A2 ( SLPID-A-2) PLP-2 (PlpId-2) through which other AV channel streams flow, and PLP-3 (PlpId-) through which the SLS channel and AV channel streams of service B1 (SvcID-B-1) flow Is associated with 3).

Also, for example, the client device 30-Y-1 in the area Y performs an initial scan at time T2, and performs two CMI metadata (“CMI for BSID-Y-1 from A”, “CMI for” in FIG. 3). BSID-Y-2 from B ”), the service map database for area Y (SMDB-Y-1 at2T2) is generated. However, it is assumed that the time T2 in this example is substantially the same as the time T1.

FIG. 5 is a diagram showing an example of the service map database (SMDB-Y-1 at T2) generated by the client device 30-Y-1 at time T2.

In FIG. 5, for channel frequency 1 (BSID-Y-1), PLP-1 (PlpId-1) through which the SLS channel and AV channel stream of service A2 (SvcID-A-2) flows, and service A2 (SvcID-A-2) is associated with PLP-2 (PlpId-2) through which another AV channel stream flows.

Similarly, for channel frequency 2 (BSID-Y-2), PLP-1 (PlpId-1) through which the stream of the SLS channel and AV channel of service B1 (SvcID-B-1) flows, and service B2 ( SLPID-B-2) is associated with PLP-2 (PlpId-2) through which the SLS channel and AV channel streams flow.

In the client device 30 existing in each area such as the area X or the area Y, the channel selection process is performed using the service map database (SMDB) generated by the initial scan, and the video or audio stream is reproduced. .

For example, in the client device 30-X-1, a service selection menu (SSM-X-1) as shown in FIG. 6 is sent to the end user based on the service map database (SMDB-X-1 at T1) in FIG. ) Is presented.

In FIG. 6, the service selection menu (SSM-X-1) displays the channel number described in the SLT metadata for each service. Here, when the end user selects the service A2 from the service selection menu (SSM-X-1), the client device 30-X-1 uses the service identifier (service ID) which is SvcID-A-2 as a key. Then, the service map database (SMDB-X-1 at T1) is referred to, and channel frequency 2 (BSID-X-2) and PLP-1 (PlpId-1) on which the SLS signaling of service A2 is transmitted are specified. The

The client device 30-X-1 obtains an ALP (ATSC Link-layer Protocol) packet obtained by demodulating the physical layer frame by giving an instruction to the tuner or demodulator using these two parameters. Furthermore, desired SLS signaling is obtained by passing through the IP / UDP / ROUTE stack. Then, in the client device 30-X-1, the content of the service A2 is reproduced by obtaining an address parameter for extracting the component stream of the service A2 to be reproduced based on the acquired SLS signaling.

Similarly, when the component stream of the service 2 to be played back obtained from SLS signaling is resolved by channel frequency 2 (BSID-X-2) and PLP-2 (PlpId-2), for example, The tuner, the demodulator, and the IP / UDP / ROUTE stack perform processing, so that the content of the service A2 is reproduced.

Here, at time T3, it is assumed that service A1 (PlpId-1 of channel frequency 1) is selected by the client device 30-X-1 in the area X and the content of the service A1 is being reproduced. However, the time T3 in this example represents a time when a predetermined time has elapsed from the time T1 or the time T2 (T1 << T3, T2 << T3).

At this time, it is assumed that the broadcast station B changes the transmission configuration of the service B1 due to certain circumstances. However, as a certain situation, for example, broadcasting station B may stop sending service B1 transmitted at channel frequency 2 in area X. FIG. 7 shows that the transmission of the service B1 provided by the broadcasting station B is stopped (“STOP” in the figure).

If the end user of the client device 30-X-1 selects the service B1 at time T4 after the change of the transmission configuration of the service B1 (slightly after), the selection of the service B1 is performed. The station is started.

At this time, in the client device 30-X-1, the broadcast middleware refers to the service map database (SMDB-X-1 at T1), and the channel frequency 2 and PlpId-3 in which the SLS signaling of the service B1 is transmitted. Is selected and the service B1 is selected, but the service B1 has not been transmitted to the channel selection destination. For this reason, the client device 30-X-1 cannot acquire a packet storing content data provided by the service B1, and an error occurs.

(Linkage of scan trigger generator and CMI generator)
In order to avoid an error caused by selecting a service for which such a transmission configuration has been changed, in the present technology, processing as illustrated in FIG. 8 is performed.

That is, at time T3, from the broadcast server 10B (the CMI generator) of the broadcasting station B that changes the transmission configuration of the service B1, the transmitter 20X (the scan trigger generator) of the transmitting station X of the area X A message to stop transmission of CMI metadata (“CMI for BSID-X-2 from B” in FIG. 8) is sent (“S1” in FIG. 8).

Upon receiving this message, the transmitter 20X (scan trigger generator) of the transmitter X transmits the client devices 30-X-1 to 30- in the area X at the level of L1 signaling included in the preamble of the physical layer frame to be transmitted. Xn is notified of configuration change information indicating a configuration change (for example, time information indicating a time T3 when the configuration change has occurred).

Accordingly, at time T4, the L1 signaling included in the physical layer frame transmitted from the transmission device 20X in the frequency bands of the channel frequency 1 and the channel frequency 2 includes configuration change information indicating a configuration change. Become. Here, for example, in the L1 signaling, the UTC time can be described as time information indicating the time T3 when the configuration change occurred (“AreaConfigLastModified = T3-UTCTime” in FIG. 8).

Also, the transmission device 20X (the scan trigger generator) notifies the broadcast station group (broadcast station A in FIG. 8) involved in the area X that the configuration change has been performed. Here, a message for signaling the scan trigger via CMI metadata (LMT metadata or SLT metadata) is sent ("S2" in FIG. 8).

In the broadcast station group that has received this message, for example, the broadcast server 10A (the CMI generator) of the broadcast station A, the CMI meta for the service A1 (SvcID-A-1) and the service A2 (SvcID-A-2). At the data level, configuration change information (for example, time information indicating the time T3 when the configuration change occurred) is notified to the client devices 30-X-1 to 30-Xn in the area X. .

Thus, the configuration change information is included in the CMI metadata included in the multiplexed stream transmitted from the broadcast server 10A of the broadcasting station A at time T4. Here, for example, CMI metadata (“CMI for BSID-X-1 from A”, “CMI for BSID-X-2 from A” in FIG. 8) includes time information indicating the time T3 when the configuration change occurred. As UTC time ("AreaConfigLastModified = T3-UTCTime" in FIG. 8).

However, CMI metadata is a generic name for LMT metadata and SLT metadata. In practice, configuration change information (time information indicating time T3) is described in LMT metadata or SLT metadata.

On the other hand, at time T4, the client devices 30-X-1 to 30-Xn in the area X receive the broadcast wave of the channel frequency 1 or the channel frequency 2 to receive the L1 signaling included in the physical layer frame. Alternatively, configuration change information included in CMI metadata (LMT metadata or SLT metadata) is acquired.

As a result, in the client devices 30-X-1 to 30-Xn, the fact that the configuration change has occurred is notified (detected) by the configuration change information (for example, time information indicating the time T3 when the configuration change has occurred). ) Will be. In the client devices 30-X-1 to 30-Xn, re-scanning is performed at a predetermined timing after the notification (detection) of the configuration change information, and the latest service map database (SMDB-X -1) is generated and retained.

As a result, for example, when the broadcasting station B stops sending the service B1, since the latest service map database (SMDB-X-1) does not include the address resolution information of the service B1, the end user It is possible to prevent the occurrence of an error when the service B1 cannot be selected and the service B1 is selected. Thus, it can be said that the configuration change information such as the time information indicating the time T3 is a scan trigger for causing the client device 30 to perform rescan.

(Detailed configuration of terrestrial broadcasting system at time T4)
FIG. 9 shows a more detailed configuration of the terrestrial broadcast system at time T4 (T3 <T4) after distribution in the area X of the service B1 of the broadcasting station B is stopped.

In the configuration of FIG. 9, since the distribution in the area X of the service B1 of the broadcasting station B is stopped as compared with the configuration of FIG. 3 described above, the broadcasting server 10B of the broadcasting station B uses CMI metadata as FIG. The difference is that the sending of “CMI for BSID-X-2 from B” is stopped.

Further, in the configuration of FIG. 9, compared to the configuration of FIG. 3 described above, since the distribution other than the distribution in the area X of the service B1 of the broadcasting station B is performed in the same manner, the broadcasting server 10A of the broadcasting station A As metadata, “CMI for BSID-X-1 from A”, “CMI for BSID-X-2 from A”, and “CMI for BSID-Y-1 from A” are transmitted. In addition, the broadcast server 10B of the broadcasting station B transmits “CMI for BSID-Y-2 from B” as CMI metadata.

However, the CMI metadata for the client devices 30-X-1 to 30-Xn in the area X in FIG. 9 includes, as configuration change information indicating the configuration change, a time indicating the time T3 when the configuration change occurred. It differs from the CMI metadata of FIG. 3 in that information (“AreaConfigLastModified = T3-UTCTime”) is included.

Further, although not shown in the configuration of FIG. 3 for simplification of description, time information (T3) indicating the time T3 when the configuration change has occurred in the L1 signaling included in the preamble of the physical layer frame of FIG. "AreaConfigLastModified = T3-UTCTime").

Note that the CMI metadata (“CMI） for BSID-Y-2 from B”) for the client devices 30-Y-1 to 30-Yn in the area Y of FIG. 9 includes configuration change information (time information). Although included, the UTC time indicates the time T0, and a time different from the time T3 when the distribution in the area X of the service B1 of the broadcasting station B is described is described. Similarly, time information (time information) that is time T0 is also included in L1 signaling included in the physical layer frame. This means that, at time T0, the service configuration that could be selected in the area Y was changed due to certain circumstances.

(Rescan client device)
When the fact that the configuration change has occurred is notified by the configuration change information (for example, time information indicating the time T3) at the L1 signaling or CMI metadata level, the client device 30 existing in each area has a predetermined At the timing, rescan and update the contents of the service map database (SMDB).

For example, the client device 30-Xn in the area X rescans at a predetermined timing based on the configuration change information (“AreaConfigLastModified = T3-UTCTime” in FIG. 9) included in the L1 signaling or CMI metadata. From the two CMI metadata (“CMI for BSID-X-1 from A” and “CMI for BSID-X-2 from A” in Fig. 9), the service map database for area X (SMDB-Xn at T3 ) Is generated.

FIG. 10 is a diagram illustrating an example of a service map database (SMDB-Xn at T3) generated by the client device 30-Xn in the area X when the time information indicating the time T3 is notified.

In FIG. 10, channel frequency 1 (BSID-X-1) is associated with PLP-1 (PlpId-1) through which the SLS channel and AV channel stream of service A1 (SvcID-A-1) flows. ing. Similarly, for channel frequency 2 (BSID-X-2), PLP-1 (PlpId-1) through which the SLS channel and AV channel stream of service A2 (SvcID-A-2) flows and service A2 ( SVPID-A-2) is associated with PLP-2 (PlpId-2) through which another AV channel stream flows.

Further, the client device 30-Yn in the area Y rescans at a predetermined timing based on the configuration change information (“AreaConfigLastModified = T0-UTCTime” in FIG. 9) included in the L1 signaling or CMI metadata. From the two CMI metadata ("CMI for BSID-Y-1 from A" and "CMI for BSID-Y-2 from B" in Fig. 9), the service map database for area Y (SMDB-Yn at T0) ) Is generated.

FIG. 11 is a diagram showing an example of a service map database (SMDB-Y-n at T0) generated by the client device 30-Yn in the area Y when the time information indicating the time T0 is notified.

In FIG. 11, for channel frequency 1 (BSID-Y-1), PLP-1 (PlpId-1) through which the stream of the SLS channel and AV channel of service A2 (SvcID-A-2) flows, and service A2 (SvcID-A-2) is associated with PLP-2 (PlpId-2) through which another AV channel stream flows. Similarly, for channel frequency 2 (BSID-Y-2), PLP-1 (PlpId-1) through which the stream of the SLS channel and AV channel of service B1 (SvcID-B-1) flows, and service B2 ( SLPID-B-2) is associated with PLP-2 (PlpId-2) through which the SLS channel and AV channel streams flow.

In the client device 30-Xn and the client device 30-Yn, the content of a desired service is reproduced by referring to the service map database generated by itself.

(Detailed configuration of terrestrial broadcasting system at time T5)
After that, at time T5, it is assumed that the broadcast station B further changes the transmission configuration of the service B1. However, the time T5 in this example represents the time when a predetermined time has elapsed from the time T3 (T3 <T5). FIG. 12 shows a detailed configuration of the terrestrial broadcasting system at time t5.

For example, in the configuration at time T4 in FIG. 9 described above, service B1 transmitted at channel frequency 2 in area Y is transmitted at channel frequency 1 in area Y in the configuration at time T5 in FIG. Suppose. As a result of this change in configuration, PLP-1 (PlpId-1) from which service B1 was transmitted becomes free at channel frequency 2 in area Y, and thus was transmitted by PLP-2 (PlpId-2). It is assumed that the configuration is changed so that the service B2 is transmitted by PLP-1 (PlpId-1).

As shown in FIG. 12, at the time T5 when the transmission configuration of the service B1 and the service B2 is changed, the transmission device of the transmission station Y in the area Y from the broadcast server 10B (CMI generator) of the broadcast station B A message indicating that transmission of CMI metadata (“CMI for BSID-Y-1 from B” in FIG. 12) is started is sent to 20Y (scan trigger generator).

Upon receiving this message, the transmission device 20Y (scan trigger generator) of the transmission station Y uses the client device 30-Y-1 to 30- in the area Y at the level of L1 signaling included in the preamble of the physical layer frame to be transmitted. Yn is notified of configuration change information indicating a configuration change (for example, time information indicating a time T5 when the configuration change has occurred).

Thereby, after time T5, the L1 signaling included in the physical layer frame transmitted in the frequency band of the channel frequency 1 and the channel frequency 2 from the transmission device 20Y includes the configuration change information indicating the configuration change. become. Here, for example, in the L1 signaling, the UTC time can be described as time information indicating the time T5 at which the configuration change occurred (“AreaConfigLastModified = T5-UTCTime” in FIG. 12).

Also, the transmitter 20Y (the scan trigger generator) notifies the broadcast station group (broadcast station A and broadcast station B in FIG. 12) that the configuration change has been made to the area Y. Here, a message for signaling the scan trigger via the CMI metadata is sent.

The broadcast station group that has received this message, for example, the broadcast server 10A (the CMI generator) of the broadcast station A, is the client in the area Y at the CMI metadata level for its service A2 (SvcID-A-2). Configuration change information (for example, time information indicating time T5) is notified to the devices 30-Y-1 to 30-Yn.

Also, for example, the broadcast server 10B (the CMI generator) of the broadcasting station B uses the area Y at the level of the CMI metadata for the service B1 (SvcID-B-1) and the service B2 (SvcID-B-2). Configuration change information (for example, time information indicating time T5) is notified to the client devices 30-Y-1 to 30-Yn.

Thereby, after the time T5, the CMI metadata (“CMI for BSID-Y-1 from A” in FIG. 12) included in the stream sent from the broadcast server 10A of the broadcast station A or the broadcast server 10B of the broadcast station B, The time information (“AreaConfigLastModified = T5-UTCTime”) indicating time T5 is included in “CMI for BSID-Y-1 from from B” and “CMI for BSID-Y-2 from from B”.

(Rescan client device)
The client devices 30-Y-1 to 30-Yn in the area Y have a configuration change caused by configuration change information (for example, time information indicating the time T5) at the level of L1 signaling or CMI metadata. When the fact is notified, rescanning is performed at a predetermined timing to update the contents of the service map database (SMDB).

However, since the configuration change information (for example, time information indicating the time T5) is not notified to the client devices 30-X-1 to 30-Xn in the area X, the rescan is performed. Instead, as shown in FIG. 13, the contents of the service map database (SMDB-Xn at T3) are not updated.

On the other hand, for example, the client device 30-Yn in the area Y has a predetermined timing based on the configuration change information (“AreaConfigLastModified = T5-UTCTime” in FIG. 12) included in the L1 signaling or CMI metadata. , Rescan, and the three CMI metadata ("CMI for BSID-Y-1 from B", "CMI for BSID-Y-1 from B", "CMI for BSID-Y-2 from B" in Figure 12) ) To generate a service map database (SMDB-Yn at T5) for area Y.

FIG. 14 is a diagram showing an example of a service map database (SMDB-Y-n T T5) generated by the client device 30-Yn in the area Y when the time information indicating the time T5 is notified.

In FIG. 14, for channel frequency 1 (BSID-Y-1), PLP-1 (PlpId-1) through which the SLS channel and AV channel stream of service A2 (SvcID-A-2) flows, and service A2 (SvcID-A-2) PLP-2 (PlpId-2) through which other AV channel streams flow, and PLP-3 (PlpId) through which the SLS channel and AV channel streams of service B1 (SvcID-B-1) flow -3) is associated. Similarly, channel frequency 2 (BSID-Y-2) is associated with PLP-1 (PlpId-1) through which the SLS channel and AV channel stream of service B2 (SvcID-B-2) flows. Yes.

(Specific examples of CMI metadata)
Next, with reference to FIGS. 15 to 19, description will be given of description examples of LMT metadata and SLT metadata constituting CMI metadata, taking the terrestrial broadcasting system of FIG. 12 as an example. However, in FIGS. 15 to 19, “A” indicates a description example of LMT metadata, and “B” indicates a description example of SLT metadata. The LMT metadata is binary format data. On the other hand, the SLT metadata is XML format data.

FIG. 15 shows “CMI for BSID-X-1 from A” in FIG. 12, that is, CMI metadata that is transmitted from the broadcast server 10A of the broadcasting station A and transmitted by the transmitting device 20X as a broadcast wave of the channel frequency 1. The structure of is shown. 15A and 15B show description examples of LMT metadata and SLT metadata transmitted by PLP-1 (PlpId-1) of channel frequency 1 (BSID-X-1), respectively. . In each metadata, in addition to address resolution information, time information indicating time T3 is described as configuration change information.

FIG. 16 shows “CMI for BSID-X-2 from A” of FIG. 12, that is, CMI metadata that is transmitted from the broadcast server 10A of the broadcasting station A and transmitted by the transmitting device 20X in the broadcast wave of the channel frequency 2. The structure of is shown. 16A and 16B show description examples of LMT metadata and SLT metadata transmitted by PLP-1 (PlpId-1) of channel frequency 2 (BSID-X-2), respectively. . In each metadata, in addition to address resolution information, time information indicating time T3 is described as configuration change information.

FIG. 17 shows “CMI for BSID-Y-1 from A” of FIG. 12, that is, CMI metadata that is transmitted from the broadcast server 10A of the broadcasting station A and transmitted by the transmitting device 20Y as a broadcast wave of the channel frequency 1. The structure of is shown. 17A and 17B show description examples of LMT metadata and SLT metadata transmitted by PLP-1 (PlpId-1) of channel frequency 1 (BSID-Y-1), respectively. . In each metadata, in addition to address resolution information, time information indicating time T5 is described as configuration change information.

FIG. 18 shows “CMI for BSID-Y-1 from」 B ”in FIG. 12, that is, CMI metadata that is sent from the broadcast server 10B of the broadcasting station B and sent by the transmitting device 20Y as a broadcast wave of the channel frequency 1. The structure of is shown. 18A and 18B show description examples of LMT metadata and SLT metadata transmitted by PLP-3 (PlpId-3) of channel frequency 1 (BSID-Y-1), respectively. . In each metadata, in addition to address resolution information, time information indicating time T5 is described as configuration change information.

FIG. 19 shows “CMI for BSID-Y-2 from B” in FIG. 12, that is, CMI metadata that is transmitted from the broadcast server 10B of the broadcasting station B and transmitted by the transmitting device 20Y as a broadcast wave of the channel frequency 2. The structure of is shown. 19A and 19B show description examples of LMT metadata and SLT metadata transmitted by PLP-1 (PlpId-1) of channel frequency 2 (BSID-Y-2), respectively. . In each metadata, in addition to address resolution information, time information indicating time T5 is described as configuration change information.

<3. Syntax example>

(Protocol stack)
FIG. 20 is a diagram illustrating an example of a protocol stack of the IP transmission method according to the present technology.

In FIG. 20, the lowest layer is the physical layer (PHY: Physical), and the upper layer is the MAC (Media Access Control) layer. The upper layer adjacent to the MAC layer is an IP (Internet Protocol) layer. The IP layer is a layer corresponding to a network layer in a communication hierarchical model, and an IP packet is identified by an IP address.

Also, the upper layer adjacent to the IP layer is the UDP (User Datagram Protocol) layer. The UDP layer is a layer corresponding to the transport layer in the communication hierarchical model, and the UDP packet is identified by the port number. The upper layer adjacent to the UDP layer is an LLS layer that transmits LLS signaling.

In FIG. 20, the L1 signaling transmitted in the physical layer can include configuration change information such as time information in addition to demodulation information. L1 signaling is included in the preamble of a physical layer frame, which is a unit for transmitting data in the physical layer. L1 signaling includes L1 basic information (L1 Basic Signaling) and L1 detailed information (L1 Detail Signaling).

Configuration change information can be included in L1 basic information or L1 detailed information. FIG. 21 shows an example of syntax when configuration change information is arranged by extending L1 signaling (L1 detailed information). In FIG. 21, 40-bit AreaConfigLastModified_UTC_time represents a UTC time as configuration change information.

For example, in this AreaConfigLastModified_UTC_time field, the lower 16 bits of MJD (Modified Julian Date) are encoded with 16 bits, and the following 24 bits are encoded with 6 4-bit binary coded decimal numbers (BCD: Binary Coded Decimal) To be able to. Thereby, for example, “93/10/13 12:45:00” can be encoded as “0xC079124500”. However, since the MJD field is 16 bits, the current date can be expressed until April 22, 2038.

Note that the detailed contents of the L1 detailed information are described in “Table 9.8 1- L1-Detail Signaling Fields and tax Syntax” of Non-Patent Document 1 below. Therefore, in the syntax of FIG. 21, a part related to the present technology is extracted and described from the L1 detailed information.

Non-patent literature 1: ATSC Candidate Standard: Physical Layer Protocol (A / 322) Doc. S32-230r456 April 2016

Here, if the L1 basic information is compared with the L1 detailed information, the L1 basic information is composed of about 200 bits, but the size of the L1 detailed information is composed of 400 to several thousand bits. Is different. Also, in the preamble of the physical layer frame, the L1 basic information and the L1 detailed information are read in that order, so the L1 basic information is read before the L1 detailed information. Furthermore, the L1 basic information is different in that it is transmitted more robustly than the L1 detailed information.

Referring back to the description of FIG. 20, the ALP packet, which is a MAC frame transmitted in the MAC layer, can include LMT metadata. This LMT metadata includes address resolution information in which PLP is associated with an IP address and a port number.

The configuration change information can include this LMT metadata. An example of syntax when the LMT metadata is expanded and configuration change information is arranged is shown in FIG. In FIG. 22, 40-bit AreaConfigLastModified_UTC_time represents the UTC time as the configuration change information.

For example, in this AreaConfigLastModified_UTC_time field, the lower 16 bits of MJD can be encoded with 16 bits, and the subsequent 24 bits can be encoded with 6 4-bit binary coded decimal numbers (BCD).

Note that the details of LMT metadata are described in “Table 7.1 Syntax for Link Link Table” of Non-Patent Document 2 below. Therefore, in the syntax of FIG. 22, portions of the LMT metadata that are particularly relevant to the present technology are extracted and described.

Non-patent document 2: ATSC Candidate Standard: Link-Layer Protocol (A / 330) Doc. S33-169r225 December 2015

Referring back to FIG. 20, the LLT signaling transmitted in the LLS layer includes SLT metadata. The SLT metadata includes address resolution information such as the IP address and port number of the service signaling session.

Configuration change information can be included in this SLT metadata. An example of the syntax when the SLT metadata is expanded and the configuration change information is arranged is shown in FIG. In FIG. 23, the UTC time as the configuration change information can be specified in the areaConfigLastModified_UTC_time attribute of the SLT element of the root element. However, whether or not to arrange this areaConfigLastModified_UTC_time attribute is arbitrary.

The SLT metadata is described in detail in “Table 6.2 SLT XML Format” of Non-Patent Document 3 below. Therefore, in the syntax of FIG. 23, a part particularly related to the present technology is extracted from the SLT metadata.

Non-patent literature 3: ATSC Candidate Standard: Signaling, Delivery, Synchronization, and Error Protection (A / 331) Doc. S33-174r15 January 2016

The configuration change information (time information) may be arranged in all of the above-described L1 signaling, LMT metadata, and SLT metadata, or a part of the arrangementable signaling (metadata). You may make it arrange | position to. For example, configuration change information can be arranged only in L1 signaling, or configuration change information can be arranged only in SLT metadata.

<4. Configuration and processing flow of each device>

Next, the configuration of each device constituting the transmission system 1 and the flow of processing will be described. However, the configuration change information (time information) described above may be distributed via broadcast or distributed via communication. is there. Therefore, here, first, the case where the configuration change information is distributed via broadcasting will be described with reference to FIGS. 24 to 30, and then the configuration change information will be described with reference to FIGS. 31 to 35. A case where distribution is performed via communication will be described.

(Sender configuration)
FIG. 24 is a diagram illustrating a configuration example of the broadcast server 10 and the transmission device 20 on the transmission side.

24, the broadcast server 10 includes a component processing unit 101, an encoder 102, a multiplexer 103, and a CMI generator 104.

The component processing unit 101 acquires component data such as video and audio from a built-in HDD (Hard Disk Drive), an external server, a camera, and the like. The component processing unit 101 processes component data and supplies the processed data to the encoder 102.

The encoder 102 encodes the component data supplied from the component processing unit 101 in accordance with a predetermined encoding method, and supplies the resulting video or audio stream to the multiplexer 103.

The CMI generator 104 generates CMI metadata including LMT metadata and SLT metadata, and supplies the generated CMI metadata to the multiplexer 103.

In order to simplify the description, the CMI generator 104 is described as generating only CMI metadata. However, in actuality, various types of metadata constituting LLS signaling and SLS signaling are generated, and the multiplexer 103.

The multiplexer 103 multiplexes the video or audio stream supplied from the encoder 102 and the signaling (for example, CMI metadata) supplied from the CMI generator 104, and sends the resulting multiplexed stream to the transmission device 20. .

24, the transmission device 20 includes a modulation unit 201 and a scan trigger generator 202.

The modulation unit 201 performs modulation processing on the multiplexed stream transmitted from the broadcast server 10 and transmits the broadcast wave obtained as a result.

The scan trigger generator 202 performs processing for L1 signaling included in the physical layer frame processed by the modulation unit 201.

Here, the CMI generator 104 of the broadcast server 10 and the scan trigger generator 202 of the transmission apparatus 20 can exchange data such as various messages via a predetermined interface.

The CMI generator 104 exchanges data with the scan trigger generator 202. When the configuration of the service or the like is changed, the CMI generator 104 notifies the CMI metadata (LMT metadata or SLT metadata) of the change of the configuration. Configuration change information (eg, time information) can be included.

The scan trigger generator 202 exchanges data with the CMI generator 104, and when the configuration of the service or the like is changed, configuration change information (for example, time information) for notifying the L1 signaling of the change of the configuration. Can be included.

The device on the transmission side is configured as described above.

(Receiver configuration)
FIG. 25 is a diagram illustrating a configuration example of the client device 30 on the receiving side.

25, the client device 30 includes a control unit 301, an input unit 302, a storage unit 303, a demodulation unit 304, a broadcast middleware 305, a decoder 306, and an output unit 307.

The control unit 301 includes, for example, a CPU (Central Processing Unit). The control unit 301 controls the operation of each unit of the client device 30.

The input unit 302 includes, for example, an input interface circuit. The input unit 302 supplies an operation signal corresponding to an operation by an end user or the like to the control unit 301. The control unit 301 controls the operation of each unit based on the operation signal from the input unit 302.

The storage unit 303 is composed of a semiconductor memory such as NVRAM (Non-Volatile RAM). The storage unit 303 stores various data according to the control from the control unit 301.

The demodulator 304 is composed of, for example, a tuner and a demodulator. The demodulator 304 demodulates the broadcast wave received via the antenna, and supplies the multiplexed stream obtained as a result to the broadcast middleware 305.

Broadcast middleware 305 performs various processes for reproducing content transmitted by broadcast waves. The broadcast middleware 305 processes the multiplexed stream supplied from the demodulator 304 and supplies the resulting video or audio stream to the decoder 306.

The function of the broadcast middleware 305 can be realized, for example, when the control unit 301 including a CPU executes a predetermined program.

The decoder 306 decodes the video or audio stream supplied from the broadcast middleware 305 according to a predetermined decoding method, and supplies the resulting video or audio data to the output unit 307.

The output unit 307 includes, for example, an output interface circuit. The output unit 307 outputs the data from the decoder 306 to a display device or a speaker.

Note that the output unit 307 may be configured by a display such as an LCD (Liquid Crystal Display) or an OELD (Organic Electroluminescence Display), and may display video corresponding to video data from the decoder 306. In addition, the output unit 307 may be configured by a speaker and output sound corresponding to the audio data from the decoder 306.

The receiving device is configured as described above.

(Transmission process)
Next, the flow of transmission processing executed by the broadcast server 10 and the transmission device 20 shown in FIG. 24 will be described with reference to the flowchart of FIG.

In step S11, the component processing unit 101 of the broadcast server 10 processes video and audio component data. The component data processed by the component processing unit 101 is decoded by the decoder 306 and input to the multiplexer 103.

In step S12, the CMI generator 104 of the broadcast server 10 performs signaling processing such as CMI metadata. Signaling processed by the CMI generator 104 is input to the multiplexer 103.

The multiplexer 103 multiplexes the video and audio streams and the signaling, and sends the resulting multiplexed stream to the transmission apparatus 20.

In step S <b> 13, the modulation unit 201 of the transmission device 20 performs modulation processing on the multiplexed stream transmitted from the broadcast server 10. A broadcast wave obtained as a result of this modulation processing is transmitted via the broadcast path 40.

The flow of transmission processing has been described above.

(Reception processing)
Next, the flow of reception processing executed by the client device 30 shown in FIG. 25 will be described with reference to the flowchart of FIG. This reception process is a process executed after the initial scan or rescan process is performed in the client device 30.

In step S21, the demodulation unit 304 performs demodulation processing on the broadcast wave received via the antenna. The multiplexed stream obtained as a result of this demodulation processing is input to the broadcast middleware 305.

In step S22, the broadcast middleware 305 extracts signaling included in the multiplexed stream and performs various processes according to the signaling. Here, for example, the broadcast middleware 305 performs various processes for reproducing the content.

In step S23, the decoder 306 decodes the video or audio stream supplied from the broadcast middleware 305. In this way, the video and audio components are processed, so that the content transmitted by the broadcast wave is reproduced.

The flow of reception processing has been described above.

(Process when updating CMI metadata)
Next, with reference to the flowchart of FIG. 28, the flow of processing in each device when the CMI metadata from the broadcasting station B (CMI for BSID-Xm from B) is updated will be described.

In FIG. 28, the processes in steps S111 to S112 are executed by the broadcast server 10A of the broadcasting station A that broadcasts in the area X, and the processes in steps S116 to S117 are broadcast in the area X. This is a process executed by the broadcast server 10B of the broadcast station B to be performed.

In FIG. 28, the processes in steps S211 to S214 are executed by the transmitting apparatus 20X of the transmitting station X in area X, and the processes in steps S311 to S316 are performed in any client apparatus 30- in the area X. This is a process executed by X.

In step S211, the scan trigger generator 202 of the transmission device 20X sends a time information update message of CMI metadata to the CMI generator 104 of the broadcast server 10A and the broadcast server 10B. Here, for example, an update to AreaConfigLastModified = T0 corresponding to the current time T0 is instructed.

In step S212, the scan trigger generator 202 of the transmission device 20X sets AreaConfigLastModified = T0 for L1 signaling (L1 detailed information) included in all physical layer frames.

The broadcast server 10A and the broadcast server 10B receive the update message sent from the scan trigger generator 202 of the transmission device 20X.

In step S111, the CMI generator 104 of the broadcast server 10A sets and transmits AreaConfigLastModified = T0 instructed to update the CMI metadata (CMI for BSID-X-n from A). The transmission device 20X transmits a broadcast wave including CMI metadata transmitted from the CMI generator 104 of the broadcast server 10A to the client device 30-X in the area X.

In step S116, the CMI generator 104 of the broadcast server 10B sets AreaConfigLastModified = T0 instructed to update the CMI metadata (CMI for BSID-X-n from B) and sends it out. The transmission device 20X transmits a broadcast wave including CMI metadata transmitted from the CMI generator 104 of the broadcast server 10B to the client device 30-X in the area X.

In the client device 30-X, when performing the initial scan, CMI metadata included in the broadcast wave transmitted from the transmission device 20X is acquired (S311 and S312). The CMI metadata includes CMI metadata (CMI for BSID-Xn from A) generated by the CMI generator 104 of the broadcast server 10A and CMI metadata (CMI for BSID generated by the CMI generator 104 of the broadcast server 10B). -Xm from B) is included. Also, AreaConfigLastModified = T0 is set in these CMI metadata.

In step S313, the broadcast middleware 305 of the client device 30-X generates a service map database (SMDB-X at T0) based on the CMI metadata acquired in the processing of steps S311 and S312 and stores it in the storage unit 303. Remember. As a result, the client device 30-X can acquire channel selection information (address resolution information) with reference to the service map database (SMDB-X at T0) during the channel selection process of the service.

Suppose that, at time T1, the service configuration of broadcasting station B changes and the CMI metadata (CMI for BSID-X-m fromB) is updated. In this case, the CMI generator 104 of the broadcast server 10B sends an update message of CMI metadata (CMI for BSID-X-m fromB) to the scan trigger generator 202 of the transmission device 20X (S117). However, AreaConfigLastModified = T1 corresponding to the configuration change time T1 is set in the CMI metadata.

The transmission device 20X receives the update message sent from the CMI generator 104 of the broadcast server 10B.

In step S213, the scan trigger generator 202 of the transmission device 20X sets AreaConfigLastModified = T1 for L1 signaling (L1 detailed information) included in all physical layer frames based on the update message from the broadcast server 10B. The transmission device 20X transmits a broadcast wave including the L1 signaling to the client device 30-X in the area X.

In step S214, the scan trigger generator 202 of the transmission device 20X sends an update message of time information of CMI metadata to the CMI generator 104 of the broadcast server 10A based on the update message from the broadcast server 10B. Here, an update to AreaConfigLastModified = T1 corresponding to the configuration change time T1 is instructed.

The broadcast server 10A receives the update message sent from the scan trigger generator 202 of the transmission device 20X.

In step S112, the CMI generator 104 of the broadcast server 10A sets AreaConfigLastModified = T1 instructed to update the CMI metadata (CMI for BSID-X-n from A) and transmits the result. The transmission device 20X transmits a broadcast wave including CMI metadata transmitted from the CMI generator 104 of the broadcast server 10A to the client device 30-X in the area X.

In the client device 30-X, L1 signaling and CMI metadata included in the broadcast wave transmitted from the transmission device 20X are acquired (S314, S315). The L1 signaling and CMI metadata include AreaConfigLastModified = T1 as time information. Since the value of AreaConfigLastModified has changed from T0 to T1, the client device 30-X detects a change in configuration (change in address resolution information).

In step S316, the broadcast middleware 305 of the client device 30-X detects a change in configuration in the processing of steps S314 and S315 (when the fact that the change in configuration has been notified) is detected at a predetermined timing (re-transmission). Re-scan at the appropriate time to scan and generate the service map database (SMDB-X at T1). As a result, the client device 30-X refers to the service map database (SMDB-X at T1) at the time of service channel selection processing, and acquires channel selection information (address resolution information) corresponding to the current configuration. be able to.

In the above, the processing flow in each device when CMI metadata is updated has been described.

(Process to stop sending CMI metadata)
Next, with reference to the flowchart of FIG. 29, the flow of processing in each device when transmission of CMI metadata (CMI for BSID-Xm from B) from the broadcasting station B is stopped will be described. Note that the processing shown in FIG. 29 is executed after the processing of FIG. 28 described above.

Suppose that the service of broadcasting station B stops and the transmission of CMI metadata (CMI for BSID-X-m fromB) stops. In this case, the CMI generator 104 of the broadcasting station B transmits a transmission stop message of CMI metadata (CMISIDfor BSID-X-m fromB) to the scan trigger generator 202 of the transmission device 20X (S121). However, AreaConfigLastModified = 0 indicating transmission stop is set in the CMI metadata.

The transmission device 20X receives the transmission stop message transmitted from the CMI generator 104 of the broadcast server 10B.

In step S221, the scan trigger generator 202 of the transmission device 20X performs the configuration change time T2 for L1 signaling (L1 detailed information) included in all physical layer frames based on the transmission stop message from the broadcast server 10B. Set the corresponding AreaConfigLastModified = T2.

In step S222, the scan trigger generator 202 of the transmission device 20X transmits an update message of CMI metadata time information to the CMI generator 104 of the broadcast server 10A based on the transmission stop message from the broadcast server 10B. Here, an update to AreaConfigLastModified = T2 corresponding to the configuration change time T2 is instructed.

The broadcast server 10A receives the update message sent from the scan trigger generator 202 of the transmission device 20X. In step S126, the CMI generator 104 of the broadcast server 10A sets AreaConfigLastModified = T2 instructed to update the CMI metadata (CMI for BSID-X-n from A) and sends it out.

The transmission device 20X transmits the broadcast wave including the L1 signaling obtained by the process of step S221 and the CMI metadata obtained by the process of step S126 to the client device 30-X in the area X.

The client device 30-X acquires L1 signaling and CMI metadata included in the broadcast wave transmitted from the transmission device 20X (S321). The L1 signaling and CMI metadata include AreaConfigLastModified = T2 as time information. Since the value of AreaConfigLastModified has changed from T1 to T2, the client device 30-X detects a change in configuration (change in address resolution information).

In step S322, the broadcast middleware 305 of the client device 30-X performs a rescan at a predetermined timing when the configuration change is detected in the process of step S321, and stores the service map database (SMDB-X at T2). Generate. As a result, the client device 30-X refers to the service map database (SMDB-X at T2) at the time of service channel selection processing, and acquires channel selection information (address resolution information) corresponding to the current configuration. be able to.

So far, the process flow in each device when CMI metadata transmission stops has been described.

(CMI metadata transmission restart processing)
Next, with reference to the flowchart of FIG. 30, the flow of processing in each device when transmission of CMI metadata (CMI for BSID-Xm from B) from the broadcasting station B is resumed will be described. Note that the processing shown in FIG. 30 is executed after the processing of FIG. 29 described above.

It is assumed that the broadcasting station B resumes the service that was stopped by the above-described processing of FIG. 29 and resumes transmission of CMI metadata (CMI for BSID-X-m fromB). In this case, the CMI generator 104 of the broadcast server 10B sends a transmission restart message of CMI metadata (CMI for BSID-X-m fromB) to the scan trigger generator 202 of the transmission device 20X (S131). However, AreaConfigLastModified = T3 corresponding to the configuration change time T3 is set in the CMI metadata.

The transmission device 20X receives the transmission restart message transmitted from the CMI generator 104 of the broadcast server 10B.

In step S231, the scan trigger generator 202 of the transmission device 20X performs the configuration change time T3 for L1 signaling (L1 detailed information) included in all physical layer frames based on the transmission restart message from the broadcast server 10B. Set the corresponding AreaConfigLastModified = T3. The transmission device 20X transmits a broadcast wave including the L1 signaling to the client device 30-X in the area X.

In step S232, the scan trigger generator 202 of the transmission device 20X transmits an update message of time information of CMI metadata to the CMI generator 104 of the broadcast server 10A based on the transmission restart message from the broadcast server 10B. Here, an update to AreaConfigLastModified = T3 corresponding to the configuration change time T3 is instructed.

In step S136, the CMI generator 104 of the broadcast server 10A sets AreaConfigLastModified = T3 instructed to update the CMI metadata (CMI for BSID-X-n-from する A) and sends it out. The transmission device 20X transmits a broadcast wave including CMI metadata transmitted from the CMI generator 104 of the broadcast server 10A to the client device 30-X in the area X.

In the client device 30-X, L1 signaling and CMI metadata included in the broadcast wave transmitted from the transmission device 20X are acquired (S331, S332). The L1 signaling and CMI metadata include AreaConfigLastModified = T3 as time information. Since the value of AreaConfigLastModified has changed from T2 to T3, the client device 30-X detects a change in configuration (change in address resolution information).

In step S333, the broadcast middleware 305 of the client device 30-X performs a rescan at a predetermined timing when a change in configuration is detected in the processing of steps S331 and S321, and the service map database (SMDB-X at T3 ) Is generated. As a result, the client device 30-X refers to the service map database (SMDB-X at T3) at the time of service channel selection processing, and acquires channel selection information (address resolution information) corresponding to the current configuration. be able to.

So far, the process flow in each device when CMI metadata transmission resumes has been described.

In the above, the case where the configuration change information (time information) is distributed via broadcasting has been described. Next, with reference to FIG. 31 to FIG. 35, a description will be given of a case where configuration change information (time information) in the case where the above-described L1 signaling and CMI metadata are not extended is distributed via communication.

(Configuration example of transmission system)
FIG. 31 is a diagram illustrating another configuration example of the transmission system.

31 differs from the transmission system 1 (FIG. 1) described above in that a scan trigger server 50 connected to the communication path 60 is provided. In the transmission system 2, the client device 30 has a communication function, and the client device 30 and the scan trigger server 50 can exchange various data via the communication path 60.

The scan trigger server 50 includes the scan trigger generator 202 shown in FIG. That is, the scan trigger generator 202 of the scan trigger server 50 can exchange data such as various messages with the CMI generator 104 of the broadcast server 10 via a predetermined interface.

The scan trigger generator 202 of the scan trigger server 50 manages time information as configuration change information based on various messages from the CMI generator 104 of the broadcast server 10. The scan trigger generator 202 of the scan trigger server 50 sends the managed time information to the client device 30 via the communication path 60 in response to a request from the client device 30.

The configuration change information (time information) managed by the scan trigger generator 202 of the scan trigger server 50 is provided in response to a request from the client device 30 side. For example, the configuration change information is pushed from the scan trigger server 50 side. Any method may be used as long as the configuration change information can be provided to the client device 30 side at a predetermined timing, such as notification.

Further, with respect to the transmission system 2 of FIG. 31, the configuration other than the above-described configuration is the same as the configuration of the transmission system 1 of FIG.

(Receiver configuration)
FIG. 32 is a diagram illustrating a configuration example of the client device 30 of FIG.

31 is different from the above-described client device 30 (FIG. 25) in that a communication unit 308 is provided.

The communication unit 308 includes, for example, a communication interface circuit. The communication unit 308 exchanges various types of data with the scan trigger server 50 through the communication path 60 in accordance with control from the control unit 301.

In the client device 30 of FIG. 31, the configuration other than the communication unit 308 is the same as the configuration of the client device 30 of FIG.

(Process when updating CMI metadata)
Next, with reference to the flowchart of FIG. 33, the flow of processing in each device when the CMI metadata (CMI for BSID-Xm from B) from the broadcasting station B is updated will be described.

In FIG. 33, the processes in steps S151 to S152 are executed by the broadcast server 10A of the broadcasting station A that broadcasts in the area X, and the processes in steps S156 to S157 are broadcast in the area X. This is a process executed by the broadcast server 10B of the broadcast station B to be performed.

In FIG. 33, the processes in steps S251 to S253 are processes executed by the transmission apparatus 20X or the scan trigger server 50X of the transmission station X in area X, and the processes in steps S351 to S358 are arbitrary in the area X. This process is executed by the client device 30-X.

In step S251, the scan trigger generator 202 of the scan trigger server 50X sets time information. Here, for example, AreaConfigLastModified = T0 corresponding to the current time T0 is set.

In step S151, the CMI generator 104 of the broadcast server 10A transmits CMI metadata (CMI for BSID-X-n from A) to the transmission device 20X. In step S156, the CMI generator 104 of the broadcast server 10B transmits CMI metadata (CMI for BSID-X-m from B) to the transmission device 20X.

Before starting the initial scan, the client device 30-X requests AreaConfigLastModified = T0 by requesting time information from the scan trigger generator 202 of the scan trigger server 50X via the communication path 60 (S351). ).

Here, for requesting time information, for example, a request for requesting the value of AreaConfigLastModifed may be transmitted using a communication protocol such as HTTP (Hypertext Transfer Protocol). Specifically, for example, when the client apparatus 30-X transmits a request “http://x.com/scanTrigger?AreaConfigLastModified” to the scan trigger server 50X, a response indicating the value of AreaConfigLastModifed is received. returned.

In an environment where a web socket (WebSocket) can be used, the scan trigger server 50X detects a change in configuration by establishing a socket connection at all times between the client device 30-X and the scan trigger server 50X. At this timing, the time information (AreaConfigLastModifed value) may be notified immediately to the client device 30-X.

In the client device 30-X, when the initial scan is started, CMI metadata included in the broadcast wave transmitted from the transmission device 20X is acquired (S352, S353). The CMI metadata includes CMI metadata (CMI for BSID-Xn from A) generated by the CMI generator 104 of the broadcast server 10A and CMI metadata (CMI for BSID generated by the CMI generator 104 of the broadcast server 10B). -Xm from B) is included. However, these CMI metadata are different from the example described with reference to FIGS. 28 to 30 described above in that the value of AreaConfigLastModified is not set.

In step S354, the broadcast middleware 305 of the client device 30-X generates a service map database (SMDB-X at T0) based on the CMI metadata acquired in the processing of steps S352 and S353, and stores it in the storage unit 303. Remember me. As a result, the client device 30-X can acquire channel selection information (address resolution information) with reference to the service map database (SMDB-X at T0) during the channel selection process of the service.

Suppose that, at time T1, the service configuration of broadcasting station B changes and the CMI metadata (CMI for BSID-X-m fromB) is updated. In this case, the CMI generator 104 of the broadcast server 10B sends an update message of CMI metadata (CMI for BSID-X-m fromB) to the scan trigger generator 202 of the scan trigger server 50X (S157).

The scan trigger server 50X receives the update message sent from the CMI generator 104 of the broadcast server 10B. Thereby, the scan trigger generator 202 of the scan trigger server 50X can detect the change of the CMI metadata (CMI for BSID-X-m fromB) from the broadcasting station B based on the update message (S252). A hash value or the like can be used when detecting a change in CMI metadata.

In step S253, the scan trigger generator 202 of the scan trigger server 50X sets time information. Here, AreaConfigLastModified = T1 corresponding to the configuration change time T1 is set.

The client device 30-X polls the scan trigger server 50X via the communication path 60, and acquires AreaConfigLastModified = T1 (S355). Since the value of AreaConfigLastModified has changed from T0 to T1, the client device 30-X detects a change in configuration (change in address resolution information).

Then, the broadcast middleware 305 of the client device 30-X, when a configuration change is detected in the process of step S355 (when the fact that the configuration change has occurred is notified), at a predetermined timing (appropriate for performing rescanning). At the correct time).

In the client device 30-X, when rescanning is started, CMI metadata included in the broadcast wave transmitted from the transmission device 20X is acquired (S356, S357). The CMI metadata includes CMI metadata (CMI for BSID-Xn from A) generated by the CMI generator 104 of the broadcast server 10A and CMI metadata (CMI for BSID generated by the CMI generator 104 of the broadcast server 10B). -Xm from B) is included. However, these CMI metadata are different from the example described with reference to FIGS. 28 to 30 described above in that the value of AreaConfigLastModified is not set.

In step S358, the broadcast middleware 305 of the client device 30-X generates a service map database (SMDB-X at T1) based on the CMI metadata acquired in the processing of steps S356 and S357, and stores it in the storage unit 303. Remember me. As a result, the client device 30-X can acquire the channel selection information (address resolution information) with reference to the service map database (SMDB-X at T1) during the service channel selection process.

(Process to stop sending CMI metadata)
Next, with reference to the flowchart of FIG. 34, the flow of processing in each device when transmission of CMI metadata (CMI for BSID-Xm from B) from the broadcasting station B is stopped will be described. Note that the process shown in FIG. 34 is executed after the process of FIG. 33 described above.

Suppose that the service of broadcasting station B stops and the transmission of CMI metadata (CMI for BSID-X-m fromB) stops. In this case, the CMI generator 104 of the broadcasting station B transmits a transmission stop message of CMI metadata (CMISIDfor BSID-X-m fromB) to the scan trigger generator 202 of the scan trigger server 50X (S161).

The scan trigger server 50X receives the transmission stop message transmitted from the CMI generator 104 of the broadcast server 10B.

The scan trigger server 50X receives the transmission stop message transmitted from the CMI generator 104 of the broadcast server 10B. Thereby, the scan trigger generator 202 of the scan trigger server 50X can detect the transmission stop of the CMI metadata (CMI for BSID-Xm fromB) from the broadcasting station B based on the transmission stop message (S261). .

In step S262, the scan trigger generator 202 of the scan trigger server 50X sets time information. Here, AreaConfigLastModified = T2 corresponding to the configuration change time T2 is set.

The client device 30-X polls the scan trigger server 50X via the communication path 60, and acquires AreaConfigLastModified = T2 (S361). Since the value of AreaConfigLastModified has changed from T1 to T2, the client device 30-X detects a change in configuration (change in address resolution information).

The broadcast middleware 305 of the client device 30-X performs rescanning at a predetermined timing when a configuration change is detected in the process of step S361. When the client device 30-X starts rescanning, the CMI metadata included in the broadcast wave transmitted from the transmission device 20X is acquired (S362). This CMI metadata includes CMI metadata (CMI for BSID-X-n from A) generated by the CMI generator 104 of the broadcast server 10A.

In step S363, the broadcast middleware 305 of the client device 30-X generates a service map database (SMDB-X at T2) based on the CMI metadata acquired in the process of step S362 and stores it in the storage unit 303. . Thereby, the client device 30-X can acquire the channel selection information (address resolution information) with reference to the service map database (SMDB-X at T2) during the channel selection process of the service.

(CMI metadata transmission restart processing)
Next, with reference to the flowchart of FIG. 35, the flow of processing in each device when transmission of CMI metadata (CMI for BSID-Xm from B) from the broadcasting station B is resumed will be described. The process shown in FIG. 35 is executed after the process of FIG. 34 described above.

It is assumed that the broadcast station B resumes the service that was stopped in the above-described processing of FIG. 34 and resumes transmission of CMI metadata (CMI for BSID-X-m fromB). In this case, the CMI generator 104 of the broadcast server 10B sends a transmission restart message of CMI metadata (CMI for BSID-X-m fromB) to the scan trigger generator 202 of the scan trigger server 50X (S171).

The scan trigger server 50X receives the transmission restart message transmitted from the CMI generator 104 of the broadcast server 10B. Thereby, the scan trigger generator 202 of the scan trigger server 50X can detect the resumption of transmission of CMI metadata (CMI for BSID-Xm fromB) from the broadcasting station B based on the transmission resumption message (S271). .

In step S272, the scan trigger generator 202 of the scan trigger server 50X sets time information. Here, AreaConfigLastModified = T3 corresponding to the configuration change time T3 is set.

The client device 30-X is polling the scan trigger server 50X via the communication path 60, and acquires AreaConfigLastModified = T3 (S371). Since the value of AreaConfigLastModified has changed from T2 to T3, the client device 30-X detects a change in configuration (change in address resolution information).

Then, the broadcast middleware 305 of the client device 30-X performs rescanning at a predetermined timing when a change in configuration is detected in the process of step S371. In the client device 30-X, when rescanning is started, CMI metadata included in the broadcast wave transmitted from the transmission device 20X is acquired (S372, S373). The CMI metadata includes CMI metadata (CMI for BSID-Xn from A) generated by the CMI generator 104 of the broadcast server 10A and CMI metadata (CMI for BSID generated by the CMI generator 104 of the broadcast server 10B). -Xm from B) is included.

In step S374, the broadcast middleware 305 of the client device 30-X generates a service map database (SMDB-X at T3) based on the CMI metadata acquired in the processing of steps S372 and S373, and stores it in the storage unit 303. Remember me. As a result, the client device 30-X can acquire the channel selection information (address resolution information) with reference to the service map database (SMDB-X at T3) during the service channel selection process.

<5. Modification>

In the above explanation, ATSC (particularly ATSC 3.0), which is a method adopted in the United States and the like, has been described as a standard for digital broadcasting. However, this technology is based on ISDB (Integrated (Services Digital Broadcasting) and DVB (Digital Video Broadcasting) which is a method adopted by European countries and the like. Further, in the above description, ATSC 3.0 in which the IP transmission method is adopted has been described as an example. However, the present invention is not limited to the IP transmission method, and is applied to other methods such as an MPEG2-TS (TransportTSStream) method, for example. You may do it.

In addition to terrestrial broadcasting, digital broadcasting standards include satellite broadcasting using broadcasting satellites (BS: Broadcasting Satellite) and communication satellites (CS: Communications Satellite), cable broadcasting such as cable TV (CATV), etc. Can be applied to

Also, the above-mentioned names of signaling, packets, frames, etc. are only examples, and other names may be used. However, the difference between these names is a formal difference and does not differ from the substantial content of the target signaling, packet, frame, or the like. For example, USD (User Service Description) may be referred to as USBD (User Service) BundleUSDDescription). For example, an ALP (ATSCATLink-layer Protocol) packet may be referred to as a generic packet or the like.

Furthermore, in the above description, the time information defined by UTC has been described as the time information. However, the time information is not limited thereto, and arbitrary time information can be used. For example, it is included in PTP (Precision Time Protocol) and NTP (Network Time Protocol) time information, 3GPP (Third Generation Partnership Project) time information, and GPS (Global Positioning System) information. Any time information such as time information, time information defined by the local time, or other time information in a uniquely determined format can be used.

<6. Computer configuration>

The series of processes described above can be executed by hardware or software. When a series of processing is executed by software, a program constituting the software is installed in the computer. FIG. 36 is a diagram illustrating a hardware configuration example of a computer that executes the above-described series of processing by a program.

In the computer 1000, a CPU (Central Processing Unit) 1001, a ROM (Read Only Memory) 1002, and a RAM (Random Access Memory) 1003 are connected to each other via a bus 1004. An input / output interface 1005 is further connected to the bus 1004. An input unit 1006, an output unit 1007, a recording unit 1008, a communication unit 1009, and a drive 1010 are connected to the input / output interface 1005.

The input unit 1006 includes a keyboard, a mouse, a microphone, and the like. The output unit 1007 includes a display, a speaker, and the like. The recording unit 1008 includes a hard disk, a nonvolatile memory, and the like. The communication unit 1009 includes a network interface or the like. The drive 1010 drives a removable recording medium 1011 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

In the computer 1000 configured as described above, the CPU 1001 loads the program recorded in the ROM 1002 or the recording unit 1008 to the RAM 1003 via the input / output interface 1005 and the bus 1004 and executes the program. A series of processing is performed.

The program executed by the computer 1000 (CPU 1001) can be provided by being recorded on a removable recording medium 1011 as a package medium, for example. The program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

In the computer 1000, the program can be installed in the recording unit 1008 via the input / output interface 1005 by attaching the removable recording medium 1011 to the drive 1010. The program can be received by the communication unit 1009 via a wired or wireless transmission medium and installed in the recording unit 1008. In addition, the program can be installed in the ROM 1002 or the recording unit 1008 in advance.

Here, in the present specification, the processing performed by the computer according to the program does not necessarily have to be performed in chronological order in the order described as the flowchart. That is, the processing performed by the computer according to the program includes processing executed in parallel or individually (for example, parallel processing or object processing). The program may be processed by a single computer (processor) or may be distributedly processed by a plurality of computers.

Note that the embodiments of the present technology are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present technology.

Also, the present technology can take the following configurations.

(1)
A receiving unit for receiving content of a service selected according to channel selection information;
And a control unit that controls resetting of the channel selection information based on configuration change information indicating a change in the configuration of the service of each broadcasting station.
(2)
The receiving device according to (1), wherein the control unit resets the channel selection information at a predetermined timing after the configuration change information is notified.
(3)
The receiving apparatus according to (1) or (2), wherein the configuration change information is information indicating a change in configuration of another service different from the service being selected.
(4)
The receiving apparatus according to any one of (1) to (3), wherein the configuration change information is information indicating a predetermined time according to a change in the configuration of the other service.
(5)
The receiving apparatus according to (4), wherein the configuration change information is information indicating that a change has occurred in channel selection information for selecting the other service.
(6)
The receiving apparatus according to any one of (1) to (5), wherein the configuration change information is transmitted with a broadcast wave together with the content.
(7)
The receiving apparatus according to (6), wherein the configuration change information is included in signaling of the preamble of a physical layer frame having a preamble and a payload.
(8)
The receiving apparatus according to (6), wherein the configuration change information is included in signaling stored in a packet obtained by demodulating a physical layer frame.
(9)
The receiving apparatus according to any one of (1) to (5), wherein the configuration change information is provided from a server provided on a network.
(10)
In the data processing method of the receiving device,
The receiving device is
Receive the content of the service selected according to the channel selection information,
A data processing method including a step of controlling resetting of the channel selection information based on configuration change information indicating a change in a configuration of a service of each broadcasting station.
(11)
A generator for generating configuration change information indicating a change in the configuration of the service of each broadcasting station;
A transmission device comprising: a transmission unit that transmits the generated configuration change information.
(12)
The transmission apparatus according to (11), wherein the configuration change information is information indicating a predetermined time according to a change in the configuration of the service.
(13)
The transmission apparatus according to (12), wherein the configuration change information is information indicating that a change has occurred in channel selection information for selecting the service.
(14)
The transmission unit according to any one of (11) to (13), wherein the configuration change information is transmitted together with content by a broadcast wave.
(15)
The transmission apparatus according to (14), wherein the configuration change information is included in the preamble of a physical layer frame having a preamble and a payload.
(16)
The transmission apparatus according to (14) or (15), wherein the configuration change information is included in signaling stored in a packet included in a physical layer frame.
(17)
The transmission device according to any one of (11) to (13), wherein the transmission unit transmits the configuration change information via a network.
(18)
In the data processing method of the transmission device,
The transmitting device is
Generate configuration change information indicating the change in the configuration of the service of each broadcasting station,
A data processing method including a step of transmitting the generated configuration change information.

1, 2 transmission system, 10, 10A, 10B broadcast server, 20, 20X, 20Y transmission device, 30, 30-X, 30-Y client device, 40 broadcast channel, 50 scan trigger server, 60 communication channel, 101 component processing Section, 102 encoder, 103 multiplexer, 104 CMI generator, 201 modulation section, 202 scan trigger generator, 301 control section, 302 input section, 303 storage section, 304 demodulation section, 305 broadcast middleware, 306 decoder, 307 output section, 308 communication Department, 1000 computers, 1001 CPU

Claims

A receiving unit for receiving content of a service selected according to channel selection information;
And a control unit that controls resetting of the channel selection information based on configuration change information indicating a change in the configuration of the service of each broadcasting station.
The receiving apparatus according to claim 1, wherein the control unit resets the channel selection information at a predetermined timing after the configuration change information is notified.
The receiving device according to claim 2, wherein the configuration change information is information indicating a configuration change of another service different from the service being selected.
The receiving apparatus according to claim 3, wherein the configuration change information is information indicating a predetermined time according to a change in the configuration of the other service.
The receiving device according to claim 4, wherein the configuration change information is information indicating that a change has occurred in channel selection information for selecting the other service.
The receiving device according to claim 1, wherein the configuration change information is transmitted by broadcast waves together with the content.
The receiving apparatus according to claim 6, wherein the configuration change information is included in signaling of the preamble of a physical layer frame having a preamble and a payload.
The receiving apparatus according to claim 6, wherein the configuration change information is included in signaling stored in a packet obtained by demodulating a physical layer frame.
The receiving apparatus according to claim 1, wherein the configuration change information is provided from a server provided on a network.
In the data processing method of the receiving device,
The receiving device is
Receive the content of the service selected according to the channel selection information,
A data processing method including a step of controlling resetting of the channel selection information based on configuration change information indicating a change in a configuration of a service of each broadcasting station.
A generator for generating configuration change information indicating a change in the configuration of the service of each broadcasting station;
A transmission device comprising: a transmission unit that transmits the generated configuration change information.
The transmission device according to claim 11, wherein the configuration change information is information indicating a predetermined time according to a change in the configuration of the service.
The transmission apparatus according to claim 12, wherein the configuration change information is information indicating that a change has occurred in channel selection information for selecting the service.
The transmission device according to claim 11, wherein the transmission unit transmits the configuration change information together with content by a broadcast wave.
The transmission apparatus according to claim 14, wherein the configuration change information is included in the preamble of a physical layer frame having a preamble and a payload.
The transmission apparatus according to claim 14, wherein the configuration change information is included in signaling stored in a packet included in a physical layer frame.
The transmission device according to claim 11, wherein the transmission unit transmits the configuration change information via a network.
In the data processing method of the transmission device,
The transmitting device is
Generate configuration change information indicating the change in the configuration of the service of each broadcasting station,
A data processing method including a step of transmitting the generated configuration change information.