CN102132560B - Method and apparatus for transmitting broadcast data, and method and apparatus for receiving broadcast data - Google Patents

Abstract

A method and apparatus for receiving or transmitting broadcast data are provided. The broadcast data receiving method includes: acquiring first signaling information indicating an ensemble in which service composition information of a broadcasting service is transmitted, acquiring the service composition information based on the first signaling information, and providing the broadcasting service based on the service composition information and the first signaling information.

Description

Method and device for transmitting broadcast data and method and device for receiving broadcast data

technical field

Methods and devices consistent with the present invention relate to methods and devices for transmitting data and receiving data, and more particularly, to methods and devices for transmitting broadcast data and receiving broadcast data.

Background technique

Due to the current development of information and communication technology, broadcasting services are provided through various media. In particular, with the development of mobile communication technology, broadcast services using mobile terminals are attracting attention.

Furthermore, since more broadcasting stations provide broadcasting services, viewers are able to select from a greater variety of channels, and thus, more viewers subscribe to broadcasting services.

Such development of mobile terminals and increased availability of various broadcast contents have greatly contributed to the development of broadcast systems.

Contents of the invention

Technical solutions

Exemplary embodiments of the present invention provide a method and apparatus for transmitting broadcast data and a method and apparatus for receiving broadcast data.

Description of drawings

The above and other aspects of the invention will become more apparent from the detailed description of exemplary embodiments of the invention with reference to the accompanying drawings, in which:

1 is a block diagram of a broadcast data transmitting device according to an exemplary embodiment of the present invention;

2 is a block diagram of a broadcast data receiving device according to an exemplary embodiment of the present invention;

FIG. 3 shows the syntax (syntax) of service composition information according to an exemplary embodiment of the present invention;

FIG. 4A shows a header of first signaling information according to an exemplary embodiment of the present invention;

FIG. 4B shows the payload of the first signaling information according to an exemplary embodiment of the present invention;

FIG. 5 shows information obtained from service composition information and first signaling information according to an exemplary embodiment of the present invention;

6 illustrates a list of broadcast services created by using service composition information according to an exemplary embodiment of the present invention;

FIG. 7 illustrates a method of providing a broadcast service in the broadcast data receiving device shown in FIG. 2 according to an exemplary embodiment of the present invention;

FIG. 8 illustrates a method of providing a broadcast service in the broadcast data receiving device shown in FIG. 2 according to another exemplary embodiment of the present invention;

FIG. 9 illustrates a method of providing a broadcast service in the broadcast data receiving device shown in FIG. 2 according to another exemplary embodiment of the present invention;

10 is a block diagram of a broadcast data transmitting device according to another exemplary embodiment of the present invention;

11 is a block diagram of a broadcast data receiving device according to another exemplary embodiment of the present invention;

FIG. 12 shows the syntax of the body of the first signaling information according to an exemplary embodiment of the present invention;

FIG. 13 illustrates an example of a 'FICdescriptor()' field when a 'label' field has a value of '0x01' according to an exemplary embodiment of the present invention;

FIG. 14 illustrates an example of a 'FICdescriptor()' field when a 'label' field has a value of '0x02' according to an exemplary embodiment of the present invention;

FIG. 15 shows an example of a configuration of a signaling information channel and an ensemble (ensemble) according to an exemplary embodiment of the present invention;

16 shows an example of the configuration of signaling information channels and ensembles according to another exemplary embodiment of the present invention;

17 is a flowchart of a broadcast data transmission method according to an exemplary embodiment of the present invention;

18 is a flowchart of a broadcast data receiving method according to an exemplary embodiment of the present invention;

19 is a flowchart of a broadcast data transmission method according to another exemplary embodiment of the present invention;

FIG. 20 is a flowchart of a broadcast data receiving method according to an exemplary embodiment of the present invention.

best practice

According to an aspect of the present invention, there is provided a broadcast data transmission method, the method including: generating service composition information of a broadcast service to be provided using at least one broadcast packet transmitted through at least one channel; generating first signaling information, The first signaling information indicates the ensemble to which the service composition information will be sent; and the broadcast packet, the service composition information and the first signaling information are sent.

The service composition information may include at least one selected from the group consisting of: a service identifier for the broadcast service, genre information representing a genre of the broadcast service, and information on a provider of the broadcast service.

The broadcast data transmission method may further include: generating, for each ensemble, second signaling information necessary for processing at least one broadcast packet to be transmitted in each ensemble, wherein, The sending step further includes: sending second signaling information in a corresponding ensemble.

The first signaling information may include an internet protocol (IP) address of the second signaling information necessary to provide the broadcast service.

The first signaling information may include mapping information between a broadcast service and an ensemble in which a broadcast packet providing the broadcast service is to be transmitted.

The first signaling information may include version information of the service composition information.

The step of transmitting the broadcast packet, the service composition information, and the first signaling information may include: transmitting the service composition information in an ensemble indicated by the first signaling information, and transmitting the first signaling information through a Fast Information Channel (FIC) .

According to another aspect of the present invention, there is provided a method for transmitting broadcast data, the method comprising: acquiring emergency information to be preferentially received by a broadcast data receiving device; Packets necessary information and includes emergency information; signaling information is sent through the FIC.

The emergency information may include at least one selected from the group consisting of accident status information, weather information, and information on broadcast packet decoding.

The emergency information may include at least one selected from the group consisting of type information representing a type of the emergency information, brief description information on the emergency information, and location information of an ensemble transmitting detailed description information on the emergency information.

According to another aspect of the present invention, there is provided a method for receiving broadcast data, the method comprising: acquiring first signaling information indicating an ensemble for sending service composition information of a broadcast service; based on the first Signaling information to obtain service composition information; broadcast services are provided based on the service composition information and the first signaling information, wherein the service composition information is about broadcast services to be provided using broadcast packets sent through at least one frequency channel composition information.

The service composition information may include at least one selected from the group consisting of: a service identifier for the broadcast service, genre information representing a genre of the broadcast service, and information on a provider of the broadcast service.

The step of providing the broadcast service may include: creating a list of broadcast services to be provided based on the service composition information; controlling display of the list of broadcast services; The ensemble of broadcast packets.

The step of providing the broadcast service may further include: acquiring second signaling information from the visited ensemble, the second signaling information including information necessary for processing broadcast packets providing the selected broadcast service; Causes the message to handle broadcast packets that provide the selected broadcast service.

The first signaling information may include an IP address of the second signaling information.

The first signaling information may further include: mapping information between broadcast services and ensembles that transmit broadcast packets providing the broadcast services.

The first signaling information may further include version information of the service composition information.

The step of acquiring the first signaling information may include: acquiring the first signaling information through FIC.

According to another aspect of the present invention, there is provided a broadcast data receiving method, the method including: receiving signaling information from an FIC, the signaling information including emergency information to be received preferentially and processing broadcast packets for providing a broadcast service. Mandatory information; get urgent information from signaling information.

The emergency information may include at least one selected from the group consisting of accident status information, weather information, and information on decoding broadcast packets.

The emergency information may include at least one selected from the group consisting of type information representing a type of the emergency information, brief description information on the emergency information, and location information of an ensemble transmitting detailed description information on the emergency information.

According to another aspect of the present invention, there is provided a broadcast data transmitting device, the device including: a service composition information generating unit that generates service composition information of a broadcast service to be provided using a broadcast packet transmitted through at least one channel; The information generation unit generates first signaling information, and the first signaling information indicates the ensemble to which the service composition information will be sent; the sending unit sends the broadcast packet, the service composition information and the first signaling information.

According to another aspect of the present invention, there is provided a broadcast data sending device, the device includes: an information acquisition unit, which acquires emergency information to be preferentially received by a broadcast data receiving device; an information generation unit, which generates signaling information, and the signaling The information includes information necessary for processing a broadcast packet providing a broadcast service and includes emergency information; the sending unit sends signaling information through the FIC.

According to another aspect of the present invention, a broadcast data receiving device is provided, and the device includes: a signaling information acquisition unit that acquires first signaling information, the first signaling information indicating the service component information of the broadcast service signal group; a service composition information acquisition unit, which acquires service composition information based on the first signaling information; a service providing unit, which provides a broadcast service based on the service composition information and the first signaling information, wherein, using the broadcast transmitted through at least one channel package to provide broadcast services.

According to another aspect of the present invention, there is provided a broadcast data receiving device, the device including: a signaling information receiving unit for receiving signaling information from an FIC, the signaling information including emergency information to be received preferentially and processing provided The information necessary for the broadcast packet of the broadcast service; the emergency information acquisition unit acquires the emergency information from the signaling information.

According to another aspect of the present invention, there is provided a broadcast data sending device, including: sending first signaling information through a fast information channel; sending a main ensemble including service composition information; sending second signaling information and at least one broadcasting a second ensemble of packets, wherein the main ensemble and the second ensemble are data transmission units divided according to error coding units, wherein the first signaling information includes a link to the main ensemble, and wherein the service composition information Information about a broadcast service provided by at least one broadcast packet is included.

The second signaling information may include one of a service mapping table and an internet protocol mapping table for processing the at least one broadcast packet.

The fast information channel may be a third ensemble coded to be more robust to errors than the main and second ensembles.

According to another aspect of the present invention, there is provided a broadcast data sending device, the device comprising: a main ensemble generating unit, which generates a main ensemble including service composition information; a second ensemble generating unit, which generates a second signaling Information and a second ensemble of at least one broadcast packet; a sending unit for sending first signaling information, a main ensemble and a second ensemble, wherein the main ensemble and the second ensemble are data transmissions divided according to an error coding unit unit, and wherein the service composition information includes information on broadcast services provided by the at least one broadcast packet.

The sending unit may send the first signaling information through the fast information channel.

The fast information channel may be a third ensemble coded to be more robust against errors than the main and second ensembles.

According to another aspect of the present invention, there is provided a broadcast data receiving device, the device comprising: acquiring first signaling information sent through a fast information channel and included in a main signal including service composition information Linking of groups; acquiring service composition information based on first signaling information; providing broadcast service based on service composition information and first signaling information, wherein the main ensemble is a data transmission unit divided according to an error coding unit, and wherein, The service composition information includes information on a broadcast service provided by at least one broadcast packet included in the second ensemble.

The main ensemble can be accessed before the second ensemble.

The method may further include the steps of: providing a list of broadcast services using the acquired service composition information; receiving a selection of the broadcast service from the user; and providing the selected broadcast service.

According to another aspect of the present invention, there is provided a broadcast data receiving device, the device includes: a signaling information acquisition unit, which acquires first signaling information, the first signaling information is sent through a fast information channel and includes a service component The link of the main ensemble of the information; the service composition information acquisition unit, which acquires the service composition information based on the first signaling information; the broadcast service providing unit, which provides the broadcast service based on the service composition information and the first signaling information, wherein the main ensemble is a data transmission unit divided according to the error coding unit, and wherein the service composition information includes information on a broadcast service provided by at least one broadcast packet included in the second ensemble.

detailed description

This application claims priority to U.S. Provisional Application No. 61/090,407, filed August 20, 2008, and Korean Patent Application No. 10-2009-0057197, filed with the Korean Intellectual Property Office on June 25, 2009, above The disclosure of the application is hereby incorporated by reference in its entirety.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a broadcast data transmitting apparatus 100 according to an exemplary embodiment of the present invention.

The broadcast data transmission device 100 includes a service composition information generation unit 110 , a signaling information generation unit 120 and a transmission unit 130 .

The service composition information generation unit 110 generates composition information of broadcast services to be provided using broadcast packets transmitted through at least one channel. The service composition information may include information on a type of broadcast service to be provided through at least one channel and a detailed description of the broadcast service. Throughout the specification, a channel refers to a channel modulated by using vestigial sideband (VSB) modulation. Multiple pieces of service composition information can be sent through one channel. However, hereinafter, for convenience of explanation, it is assumed that one piece of service composition information is transmitted through one channel. The service composition information may include not only composition information of broadcast services to be provided through a channel carrying the service composition information but also composition information of broadcast services to be provided through other channels.

The service composition information may include at least one selected from the group consisting of: a service identifier for identifying each broadcast service, genre information representing a genre of each broadcast service, and a genre of each broadcast service. Brief description information. The service composition information may further include mapping information between a broadcast service and an IP address of a broadcast packet providing the broadcast service or mapping information between the broadcast service and second signaling information (described below) corresponding to the broadcast service. The above-mentioned items of information are just examples of service composition information, and any information on broadcast services may be included as service composition information.

The signaling information generating unit 120 generates first signaling information, and the first signaling information indicates an ensemble to transmit service composition information. Throughout the specification, an ensemble refers to a data transmission unit divided according to an error coding unit. At least one ensemble may be transmitted over the same frequency transmission channel. The first signaling information may be assigned the identification number of the ensemble in which the service composition information is transmitted, and thus the first signaling information may indicate the ensemble in which the service composition information is transmitted. In addition, the first signaling information may include version information of the service composition information to indicate whether the service composition information has been updated.

The first signaling information may include mapping information between broadcast services and ensembles. In other words, the first signaling information may include information on an ensemble providing each broadcast service.

Also, the first signaling information may include an IP address of the second signaling information corresponding to each broadcast service.

The signaling information generating unit 120 may also generate second signaling information. Second signaling information is generated for each ensemble, wherein the second signaling information is necessary for processing broadcast packets to be sent in the ensemble. Examples of the second signaling information may include an IP mapping table (IMT), a service mapping table (SMT), and the like. The second signaling information may include a description of a broadcast service provided in a broadcast packet of the ensemble and an IP address of the broadcast packet.

If the IP address of the second signaling information is an IP address pre-assigned by the broadcast data sending device 100 and the broadcast data receiving device described below, the broadcast data receiving device knows the IP address of the second signaling information, so the broadcast data sending device 100 does not additionally send the IP address of the second signaling information to the broadcast data receiving device.

However, if the broadcast data receiving device does not know the IP address of the second signaling information, the broadcast data transmitting device 100 may transmit the IP address of the second signaling information to the broadcast data receiving device. In the latter case, the IP address of the second signaling information may be included in at least one selected from the group consisting of the service composition information and the first signaling information. For example, mapping information between a broadcast service identifier and an IP address of the second signaling information corresponding to the broadcast service identifier may be included in at least one selected from the following group, wherein the group includes service components information and first signaling information. The second signaling information corresponding to the broadcast service identifier refers to the second signaling information used to process the broadcast service indicated by the broadcast service identifier, and in more detail, refers to the second signaling information used to process the broadcast service that provides the corresponding broadcast service. The second signaling information of the packet.

The sending unit 130 sends the broadcast packet, service composition information and first signaling information.

The sending unit 130 may send the first signaling information through the FIC. Throughout the specification, FIC refers to an ensemble that is to be coded to be more robust to error correction than other ensembles. At least one FIC is included in each channel.

The sending unit 130 sends service ensemble information in the ensemble indicated by the first signaling information, and sends broadcast packets in other ensembles. The ensemble transmitting the service composition information may contain only the service composition information or may contain the service composition information as well as a broadcast packet.

FIG. 2 is a block diagram of a broadcast data receiving device 200 according to an exemplary embodiment of the present invention.

The broadcast data receiving device 200 includes a signaling information acquiring unit 210 , a service composition information acquiring unit 220 and a service providing unit 230 .

The signaling information obtaining unit 210 may obtain first signaling information, where the first signaling information indicates an ensemble for sending service composition information of a broadcast service. The service composition information includes information on the composition of all broadcast services provided using broadcast packets transmitted through at least one channel. The signaling information obtaining unit 210 may obtain the first signaling information through the FIC.

The service composition information obtaining unit 220 obtains composition information based on the first signaling information. Since the first signaling information includes information about an ensemble transmitting the service composition information, the service composition information acquiring unit 220 may acquire the composition information from the ensemble based on the first signaling information.

The service providing unit 230 provides a broadcast service selected by a user based on the service composition information and the first signaling information. In order to enable a user to easily select a desired broadcast service, the service providing unit 230 may include a list generation unit 231 , a control unit 232 , an access unit 233 , a second signaling information acquisition unit 234 and a processing unit 235 .

The list generation unit 231 generates a list of broadcast services to be provided based on the service composition information. Assuming that one piece of service composition information is transmitted through one channel, the list generating unit 231 generates a list of broadcast services to be provided by the broadcast data receiving apparatus 200 using at least one piece of service composition information respectively transmitted through a plurality of channels.

The control unit 232 controls output of a list of broadcast services. The control unit 232 controls a list of broadcast services to be output through an output device such as a display device or a speaker. The user may select one of the broadcast services in the list of the output broadcast services.

The access unit 233 accesses an ensemble transmitting a broadcast packet providing a broadcast service selected by a user. The broadcast composition information includes a service identifier for identifying the selected broadcast service, and the first signaling information includes mapping information between the service identifier and the ensemble. Accordingly, the access unit 233 may selectively access an ensemble providing a broadcast service selected by a user using the service composition information and the first signaling information.

The second signaling information acquiring unit 234 acquires second signaling information from the accessed ensemble. The second signaling information is necessary for processing broadcast packets transmitted in the ensemble, and may include information on which broadcast service will be provided in the ensemble and information on an IP address of a broadcast packet providing the broadcast service.

When the broadcast data sending device 100 and the broadcast data receiving device 200 have pre-allocated the IP address of the second signaling information, the second signaling information obtaining unit 234 can obtain the IP address in the accessed ensemble with the pre-allocated IP address broadcast packet to obtain the second signaling information without additional information.

However, when the broadcast data transmitting device 100 and the broadcast data receiving device 200 have not pre-assigned the IP address of the second signaling information, the IP address of the second signaling information may be included in the information including the service composition information and the first signaling information. in at least one of the group selections. In this case, the second signaling information obtaining unit 234 may obtain the IP address of the second signaling information from at least one selected from the group including the first signaling information and the service composition information.

The processing unit 235 processes the broadcast packet providing the selected broadcast service using the second signaling information.

In an exemplary embodiment, the list generation unit 231 and the control unit 232 may not be included in the broadcast data receiving apparatus 200 . Alternatively, the list generating unit 231 and the control unit 232 may be included in the broadcast data receiving device 200, and only when the broadcast data receiving device 200 starts operating, when the receiving area changes, when the user requests, when the service composition information The list generation unit 231 and the control unit 232 are operable when the version is changed and/or when the broadcast data receiving apparatus 200 is initialized. In another exemplary embodiment, when the broadcast data receiving device 200 operates, the list generation unit 231 and the control unit 232 may use previously received service composition information or first signaling information to provide a list of broadcast services so that the user can Select a broadcast service.

FIG. 3 illustrates syntax of service composition information according to an exemplary embodiment of the present invention. The Channel Description Table (CDT, Channel Description Table) in Figure 3 is an example of service composition information. In addition, 'channel' in FIG. 3 is distinguished from 'channel' used throughout the specification, and 'channel' in FIG. 3 refers to the concept of a broadcast service.

The "M1_info_type" field 310 indicates the type of data. In FIG. 3 , the 'M1_info_type' field 310 has a value of '0x02', and fields below the 'M1_info_type' field 310 relate to service composition information.

A 'channel_identifier' field 320 is used to identify a broadcast service.

The 'channel_type' field 330 indicates the type of broadcast service, that is, the genre of broadcast service. Genres of broadcast services may be variously classified into, for example, movies, sports, dramas, news, animation, women/culture, babies/children, documentaries, education, and entertainment.

Genre information may also be represented as, for example, audio service, audio video (A/V) service, data service, and the like.

A 'virtual_channel_status' field 340 represents the current status of the broadcast service. For example, the 'virtual_channel_status' field 340 may indicate whether the broadcast service is 'active' or 'inactive'. The "active" state refers to a state in which the current broadcast service is available, and the "inactive" state refers to a state in which the current broadcast service is not available. The 'inactive' state may also refer to a state in which all broadcast packets of the broadcast service are not transmitted.

Also, the 'virtual_channel_status' field 340 may represent whether the broadcast service is 'hidden'. A state in which a broadcast service is "hidden" may refer to a state in which a broadcast packet providing a broadcast service is transmitted but not seen by a user.

A 'base_channel_indicator' field 350 represents whether a corresponding broadcast service is related to other broadcast services. For example, assuming that the broadcast data transmitting device 100 provides all contents of a high-quality broadcast service, wherein all contents of the high-quality broadcast service are the same as all contents of a low-quality broadcast service, the "base_channel_indicator" field 350 may indicate that the broadcast service comes from a low-quality broadcast service. The broadcast service is again from the high-quality broadcast service. Also, the 'base_channel_indicator' field 350 may include description information of broadcast services related to other broadcast services. In this case, the 'base_channel_indicator' field 350 may include an identifier of a high-quality (or low-quality) broadcast service and an identifier of an ensemble providing the high-quality broadcast service (or low-quality broadcast service).

The 'short_channel_description' field 360 may include a short description of the broadcast service. The 'short_channel_description' field 360 may include any information describing the broadcast service. For example, the 'short_channel_description' field 360 may include information on a broadcast service provider providing a corresponding broadcast service.

A 'channel_descriptor_loop' field 370 represents a detailed description of a broadcast service. For example, detailed genre information of a broadcast service may be included in the 'channel_descriptor_loop' field 370 .

The syntax in FIG. 3 is only an example of the service composition information, and the service composition information may further include the IP address of the broadcast packet providing the broadcast service, the IP address of the second signaling information necessary to process the broadcast packet, or the IP address of the broadcast service The identifier of the semaphore group.

4A and 4B illustrate syntax of first signaling information according to an exemplary embodiment of the present invention.

FIG. 4A shows a header of first signaling information according to an exemplary embodiment of the present invention.

A "transport_stream_id" field 412 indicates an identifier of a stream transmitted through a channel.

An "ESG_version" field 414 indicates a version of electronic service guide (ESG) data. ESG data is metadata of broadcast services.

The "IMT_version" field 416 indicates the version of the IMT data. The IMT data may include mapping information between the IP address of the broadcast packet and information on the location of the broadcast packet in the ensemble. In other words, the IMT data indicates the position of the broadcast packet within the ensemble.

A 'CDT_version' field 418 represents version information of a Channel Description Table (CDT).

FIG. 4B shows a payload of first signaling information according to an exemplary embodiment of the present invention.

The "ensemble_id" field 422 is an identifier of an ensemble.

A 'primary_ensemble_indicator' field 424 indicates whether a corresponding ensemble is a primary ensemble. A primary ensemble is one that is defined to be accessed before other ensembles. Accordingly, the 'primary_ensemble_indicator' field 424 may indicate the ensemble in which the CDT is transmitted.

A 'SG_entry_point_indicator' field 426 indicates whether a service guide (SG) is included in a corresponding ensemble.

A 'num_channels' field 428 represents the number of broadcast services provided through a corresponding ensemble.

A 'channel_type' field 432 refers to a form in which a broadcast service is provided. For example, the 'channel_type' field 432 may indicate that the broadcast service is an audio service, an A/V service, a data service, or an emergency information service.

A 'virtual_channel_status' field 434 indicates the status of a broadcast service. For example, the 'virtual_channel_status' field 434 may indicate whether the broadcast service is 'active', 'inactive', 'hidden', etc. as described above.

A 'primary_channel_indicator' field 436 indicates a primary broadcast service. For example, the 'primary_channel_indicator' field 436 may indicate a broadcast service in an ensemble to be provided first among a plurality of other broadcast services, and may indicate, for example, second signaling information.

The 'SP_indicator' field 438 represents whether at least one of components necessary to provide a corresponding broadcast service has been encrypted or scrambled.

A 'major_channel_num' field 442 and a 'minor_channel_num' field 444 contain information for identifying a broadcast service, and are classified according to predetermined criteria. For example, the 'major_channel_num' field 442 may be classified according to service providers. For the 'major_channel_num' field 442, broadcast services provided by the same service provider may have the same value. Also, the 'minor_channel_num' field 444 may be classified according to broadcast services provided by the same service provider.

According to an exemplary embodiment of the present invention, information about which broadcast service is provided in each ensemble may be obtained from two For loops in the first signaling information.

FIG. 5 shows information obtained from service composition information and first signaling information according to an exemplary embodiment of the present invention. Information obtained from the service composition information and the first signaling information includes a service identifier 510 , an IP address and an ensemble identifier 530 .

Referring to FIG. 5, service #1 corresponds to second signaling information provided in ensemble #1 and ensemble #3 and having IP addresses 222.0.0.1 and 222.0.0.2. In other words, a broadcast packet providing service #1 is transmitted in ensemble #1 and ensemble #3, and the broadcast packet providing service #1 is processed by using the second signaling information having IP addresses 222.0.0.1 and 222.0.0.2 broadcast packet.

Assume the user has requested service #1. The broadcast data receiving device initially accesses ensemble #1 to obtain a broadcast packet having an IP address of 222.0.0.1, and then accesses ensemble #3 to obtain a broadcast packet having an IP address of 222.0.0.2. The acquired broadcast packet includes the second signaling information, and the broadcast data receiving device may acquire the IP address of the broadcast packet providing service #1 by processing the second signaling information. Subsequently, the broadcast data receiving device may provide service #1 by selectively processing only broadcast packets providing service #1.

FIG. 6 illustrates a list of broadcast services created using service composition information according to an exemplary embodiment of the present invention.

The list of broadcast services includes a broadcast channel number 610 , broadcast channel information 620 , upper genre information 630 , and lower genre information 640 .

Throughout the specification, the concept of a broadcast channel number 610 enabling a user to easily recognize a broadcast service is different from that of a physical channel. The broadcast channel number 610 may have a format of "primary broadcast channel number"-"secondary broadcast channel number". Here, the 'primary broadcast channel number' may be used to identify a broadcast station (ie, service provider) providing a broadcast service, and the 'secondary broadcast channel number' may be used to identify an individual broadcast service provided by the same service provider. In FIG. 6, the "main broadcast channel number" of the broadcast service provided by "broadcast station A" is "10", and the "main broadcast channel number" of the broadcast service provided by "broadcast station D" is "12".

In another exemplary embodiment, the broadcast channel number 610 may include a single channel number, and the broadcast channel number 610 may be transmitted.

The broadcast channel information 620 is a description of the corresponding broadcast channel. Broadcast channel information 620 may include any information about broadcast channels. For example, the broadcast channel information 620 may include brief information on a service provider of a broadcast service provided through a broadcast channel, information on a genre of a broadcast service provided through the broadcast channel, and the like.

The upper genre information 630 represents an upper genre of a currently provided broadcast service. The upper-level genres may be classified in various ways according to embodiments. For example, upper genres of broadcasting services may be classified into drama, movie, sports, news, and metadata.

The lower genre information 640 indicates a subgenre of a broadcast service. Information indicating what the broadcast service is about can be provided more precisely based on the lower-level genre information 640 . In other words, the upper genre information 630 may indicate upper categories of a plurality of genres to which a broadcast service belongs, and the lower genre information 640 may indicate lower categories of a plurality of genres to which a broadcast service belongs.

FIG. 7 illustrates a method of providing a broadcast service in the broadcast data receiving apparatus 200 according to an exemplary embodiment of the present invention.

When the user starts operating the broadcast data receiving device 200 or initializes the broadcast data receiving device 200, broadcast channel scanning starts. The broadcast data receiving apparatus 200 may provide a list of broadcast channels available to the user by scanning broadcast channels.

Broadcast channels can be scanned according to the following two methods.

First, broadcast channels may be scanned using service composition information 721 included in the main ensemble 720 .

The broadcast data receiving device 200 acquires first signaling information 710 from the FIC. The first signaling information 710 includes information necessary to process broadcast packets transmitted in at least one of the ensemble 730-1, 730-2, and 730-N.

Referring to FIG. 7, the first signaling information 710 may include a service identifier, IP information, version information, genre information, and an ensemble identifier.

The IP information represents an IP address of second signaling information necessary to provide a broadcast service corresponding to the service identifier.

The version information indicates the version of the second signaling information.

The genre information indicates the genre of the broadcast service corresponding to the service identifier.

The ensemble identifier indicates an ensemble providing a broadcast service corresponding to the service identifier.

Although not shown in FIG. 7 , the first signaling information 710 may further include information indicating the main ensemble 720 in which the service composition information 721 is transmitted. Also, the IP address and genre information of the second signaling information may be exclusively included in the service composition information 721 and may not be included in the first signaling information 710 .

Next, the broadcast data receiving apparatus 200 accesses the main ensemble 720 transmitting the service composition information 721 based on the first signaling information 710 and acquires the service composition information 721 from the accessed main ensemble 720 .

The broadcast data receiving device 200 repeats the above-described processing for all channels to acquire all the service composition information 721 .

Subsequently, the broadcast data receiving apparatus 200 creates a list of broadcast channels by processing the service composition information 721, and provides the list of broadcast channels to the user.

Second, broadcast channels can be scanned without using the service composition information 721 .

The broadcast data receiving device 200 receives first signaling information 710 from the FIC. The first signaling information 710 includes the IP address of the second signaling information.

The broadcast data receiving apparatus 200 acquires the second signaling information from each ensemble 730-1, 730-2...730-N using the IP address of the second signaling information. The second signaling information includes information necessary to process a broadcast packet transmitted in a corresponding ensemble and information on a broadcast service to be provided by the corresponding ensemble.

The broadcast data receiving apparatus 200 creates a list of broadcast channels by processing the second signaling information, and then provides the list of broadcast channels to a user.

Since the broadcast data receiving device 200 acquires the second signaling information by accessing each ensemble, the latter method takes a long time. However, in the former method, the broadcast data receiving apparatus 200 can scan broadcast channels by accessing one ensemble to acquire only the service composition information 721, and thus it takes less time to scan broadcast channels.

Once the scanning of broadcast channels is completed through the above processing, the list of created broadcast services can be provided to the user unless there is an abnormal situation, such as when the service composition information 721 is updated, when there is a user's request, or when the broadcast data When the receiving device 200 is initialized. In all abnormal cases, perform a broadcast channel scan again.

When a list of broadcast services is provided, the user selects one of the broadcast services included in the list. If the user does not select one of the broadcast services, a broadcast service corresponding to the most recently selected broadcast channel may be selected. Alternatively, a broadcast service corresponding to a broadcast channel set as a default may be selected.

When a user selects a broadcast service, the broadcast data receiving apparatus 200 uses the first signaling information 710 to access an ensemble providing the selected broadcast service. As described above, the first signaling information 710 includes information indicating an ensemble in which each broadcast service is transmitted.

The broadcast data receiving apparatus 200 acquires the second signaling information from the accessed ensemble. The second signaling information optionally has an IP address pre-assigned by both the broadcast data transmitting device 100 and the broadcast data receiving device 200 . When the second signaling information includes IP addresses pre-allocated by both the broadcast data transmitting device 100 and the broadcast data receiving device 200, the broadcast data receiving device 200 acquires a broadcast packet with the pre-allocated IP address from the accessed ensemble. When the second signaling information does not include a pre-assigned IP address, identify the IP address of the second signaling information based on the service composition information 721 included in the main ensemble 720 or the first signaling information 710, and have the identified The broadcast packet of the IP address is obtained.

When the second signaling information has been acquired, the broadcast data receiving device 200 acquires the IP address of the broadcast packet providing the broadcast service selected by the user from the second signaling information. As described above, the second signaling information may include an IP address of a broadcast packet providing each broadcast service.

Finally, the broadcast data receiving apparatus 200 provides a broadcast service selected by a user by processing broadcast packets acquired from the accessed ensemble.

Assume that the user has selected broadcast service #1 indicated by service identifier #1 in FIG. 7 .

Referring to the first signaling information 710, a broadcast packet providing a broadcast service #1 is transmitted in an ensemble #1 indicated by an ensemble identifier #1. Accordingly, the broadcast data receiving apparatus 200 acquires the second signaling information by accessing the ensemble #1 (730-1). An IP address of a broadcast packet providing broadcast service #1 is identified from the acquired second signaling information, and the broadcast packet is acquired by using the identified IP address.

Next, the broadcast data receiving device 200 provides broadcast service #1 by processing the acquired broadcast packets.

FIG. 8 illustrates a method of providing a broadcast service in a broadcast data receiving device 200 according to another exemplary embodiment of the present invention.

FIG. 8 shows a case where a broadcast packet providing a broadcast service is transmitted in at least two ensembles of an ensemble 830-1, an ensemble 830-2, and an ensemble 830-N.

It is also assumed that the user has selected broadcast service #1 indicated by service identifier #1 in FIG. 8 .

Referring to the first signaling information 810, broadcast packets providing broadcast service #1 are transmitted in ensemble #1 and ensemble #2.

In another exemplary embodiment of the present invention, broadcast service #1 may be provided by processing all broadcast packets transmitted in both ensemble #1 and ensemble #2. Optionally, broadcast service #1 is provided at low quality by processing only broadcast packets sent in ensemble #1, or by processing until broadcast packets sent in ensemble #2 The broadcast packets sent in provide broadcast service #1 at high quality.

The broadcast data receiving apparatus 200 recognizes the broadcast packet by acquiring the second signaling information 831-1 from the ensemble #1 (830-1) and acquiring the second signaling information 831-2 from the ensemble #2 (830-2). IP address. The IP address of the second signaling information 831 - 1 and the IP address of the second signaling information 831 - 2 may be included in the service composition information 821 included in the main ensemble 820 .

Next, the broadcast data receiving device 200 acquires a broadcast packet for broadcast service #1 by using the acquired IP address, and provides broadcast service #1 by processing the broadcast packet.

FIG. 9 illustrates a method of providing a broadcast service in a broadcast data receiving device 200 according to another exemplary embodiment of the present invention. FIG. 9 shows a situation in which at least one ensemble of ensembles 930-1, 930-2, and 930-N provides a naked IP service (naked IP service).

Assume that the user has selected Unprotected IP Service #1 in FIG. 9 .

Throughout the specification, an unprotected IP service refers to a service provided by processing a broadcast packet using signaling information that is different in form from a general broadcast service. A wider variety of services can be provided by using unprotected IP services.

Referring to the first signaling information 910, a broadcast packet providing an unprotected IP service #1 is provided in an ensemble #N (930-N). In order to process broadcast packets providing unprotected IP services, third signaling information, which is different in form from the second signaling information, is used. Therefore, at least one selected from the group including the first signaling information 910 and the service composition information 921 included in the main ensemble 920 includes a flag indicating an unprotected IP service and an unprotected IP address including the third signaling information. Protect IP service information.

In FIG. 9, IMT is shown as an example of third signaling information. The IMT including information indicating the location of the broadcast packet transmitted in the ensemble includes mapping information between the IP address of the broadcast packet and the location of the broadcast packet in the ensemble.

The broadcast data receiving device 200 acquires IMT (931-N) by accessing ensemble #N (930-N). Next, the broadcast data receiving apparatus 200 may provide unprotected IP service #1 by acquiring desired broadcast packets based on IMT (931-N).

FIG. 10 is a block diagram of a broadcast data transmitting apparatus 1000 according to an exemplary embodiment of the present invention.

The broadcast data transmission device 1000 includes an information acquisition unit 1010 , an information generation unit 1020 and a transmission unit 1030 .

The information acquiring unit 1010 acquires emergency information to be preferentially received by the broadcast data receiving device. The emergency information may be set in various ways. For example, emergency information may include information to be transmitted preferentially such as information on decoding of a broadcast packet providing a broadcast service and any information to be transmitted preferentially such as accident information, weather information, and the like.

The emergency information may include at least one selected from the group consisting of type information representing a type of the emergency information, brief description information on the emergency information, and location information of an ensemble transmitting detailed description information on the emergency information.

The type information is information indicating the type of data related to the emergency information. For example, the type information may indicate which type of information is transmitted as emergency information among accident information, digital rights management (DRM) information, and weather information.

Type information can be represented by using a 'channel_type' field 432 in FIG. 4B. In this case, information about the ensemble sending the emergency information can be quickly signaled without additional "description".

The short descriptive information about emergency information may include textual information to be provided to the user. The user may request detailed descriptive information after checking short descriptive information about emergency information. However, when the detailed description information on emergency information is transmitted through the FIC, the bandwidth of the FIC may not be sufficient to transmit the detailed description information. Accordingly, detailed description information on emergency information may be transmitted by using an ensemble, and information on a location of an ensemble transmitting the detailed description information on emergency information may be included in signaling information. If the user requests the detailed information on emergency information, the broadcast data receiving apparatus to be described below accesses the signal transmitting the detailed information on emergency information using the position information of the ensemble transmitting the detailed information on emergency information group.

The ensemble identifier used to identify the ensemble may be used as location information of the ensemble.

The information generating unit 1020 generates signaling information including information necessary to process a broadcast packet providing a broadcast service and also including emergency information.

The sending unit 1030 sends signaling information through the FIC.

FIG. 11 is a block diagram of a broadcast data receiving device 1100 according to another exemplary embodiment of the present invention.

The broadcast data receiving device 1100 includes an information acquiring unit 1110 and a processing unit 1120 .

The information acquiring unit 1110 acquires signaling information from the FIC. The signaling information may include information necessary to process a broadcast packet providing a broadcast service and emergency information to be preferentially received by the broadcast data receiving device 1100 .

The 'channel_type' field 432 of the first signaling information in FIG. 4B may indicate whether emergency information exists.

The emergency information may include information preferentially received by the broadcast data receiving device, such as accident status information, weather information, etc., or information on decoding broadcast packets.

The emergency information may include at least one selected from the group consisting of type information representing a type of the emergency information, short description information on the emergency information, and location information of an ensemble transmitting detailed description information on the emergency information.

The processing unit 1120 obtains emergency information by processing signaling information. Depending on the type of emergency information, the emergency information is used to process a broadcast packet, or may be output to a user. The processing unit 1120 may further include an output unit (not shown). Emergency information may be output to the user through the output unit, if necessary.

When the processing unit 1120 receives the emergency information, the currently provided broadcast service may be stopped so that the emergency information is preferentially output.

The processing unit 1120 may include a storage unit (not shown), an output unit (not shown), and a control unit (not shown).

When receiving the emergency information, the control unit stops providing the current broadcast service, and controls the storage unit to store processing information on processing of the current broadcast service. The handling information may include any kind of information for providing a suspended broadcast service. For example, the processing information may include a next location where the current broadcast service will be provided and data that has been generated during the provision of the current broadcast service.

Next, the output unit outputs emergency information.

If the emergency situation corresponding to the emergency information is terminated or if a termination request is received from the user, the control unit controls the output unit to restart providing the suspended broadcast service.

FIG. 12 illustrates syntax of a body of first signaling information according to an exemplary embodiment of the present invention.

In FIG. 12, a 'num_of_descriptor' field 1210 indicates the number of emergency information to be transmitted in the first signaling information.

A 'tag' field 1220 indicates the type of emergency information. Exemplary values for the "label" field 1220 are defined in Table 1.

[Table 1]

[Table 1]

0x01 accident information 0x02 CAS/DRM decoding information 0xxx reserve

Referring to Table 1, when the 'label' field 1220 has a value of '0x01', the 'FICdescriptor()' field 1230 represents accident information. Also, when the 'tag' field 1220 has a value of '0x02', the 'FICdescriptor()' field 1230 represents CAS/DRM decoding information.

FIG. 13 illustrates an example of the 'FICdescriptor()' field 1230 when the 'tag' field 1220 has a value of '0x01' according to an exemplary embodiment of the present invention.

The 'accident_main_type' field 1310 represents information on the type of accident information.

The 'accident_sub_type' field 1320 represents additional information on the type of accident information. For example, the 'accident_main_type' field 1310 may indicate a higher-level category of accident information, and the 'accident_sub_type' field 1320 may indicate a lower-level category of accident information. For example, when the 'accident_main_type' field 1310 represents 'natural accident', the 'accident_sub_type' field 1320 may represent one selected from the group including 'flood', 'forest fire' and 'earthquake'.

The 'ensemble_id' field 1330 represents information on the location of an ensemble transmitting detailed accident information. In other words, the information indicating the ensemble that transmits the detailed accident information is represented by the ensemble identifier.

The "accident_description" field 1340 includes a brief description of the accident information.

FIG. 14 illustrates an example of the 'FICdescriptor()' field 1230 when the 'label' field 1220 has a value of '0x02' according to an exemplary embodiment of the present invention.

A 'segmentation_number' field 1410 indicates the number of segments when data is segmented.

A 'last_segment_number' field 1420 indicates the number of the last segment when data is segmented.

A 'key_stream_main_type' field 1430 represents identification information of a data stream that transmits an encryption key.

A 'key_stream_sub_type' field 1440 indicates additional identification information of a data stream transmitting an encryption key.

The 'ensemble_id' field 1450 represents indication information of an ensemble that transmits detailed information on data decoding. In other words, information indicating an ensemble that transmits detailed information on decoding is represented by an ensemble identifier.

A "key_stream_length" field 1460 indicates length information of a data stream in which an encryption key is transmitted.

A "key_stream" field 1470 represents information on an encryption key.

An 'additional_key_stream_descriptor_length' field 1480 indicates length information of a data stream transmitting an additional key stream descriptor.

The "additional_key_stream_descriptor()" field 1490 represents additional information on the encryption key.

FIG. 15 shows an example of configurations of FIC channels and ensembles according to an exemplary embodiment of the present invention.

The FIC 1510 includes first signaling information, where the first signaling information includes a first signaling information header and a first signaling information body. The first signaling information may include emergency information to be preferentially received by the broadcast data receiving device or information for processing a broadcast packet providing a broadcast service.

In FIG. 15, when the first signaling information provides accident information, detailed information on the accident information is transmitted in an ensemble having an identifier '0x02'.

Signal group #1 1520 includes service composition information. Ensemble #1 1520 is indicated by the first signaling information.

In FIG. 15, broadcast channel information corresponds to service composition information. The broadcast channel information includes a broadcast channel number 1521 , a broadcast channel name 1522 , a broadcast channel status 1523 and a broadcast channel type 1524 .

Ensemble #N 1530 transmits broadcast services corresponding to broadcast channel 20-1.

FIG. 16 shows an example of a configuration of a FIC 1610 and an ensemble according to another exemplary embodiment of the present invention.

In FIG. 16, the first signaling information provides decoding information. The detailed description of the decoded information is sent in the ensemble with the identifier "0x03", and the already encrypted data streams are sent in the ensembles with the identifiers "0x03", "0x04", "0x05" and "0x06", respectively.

FIG. 17 is a flowchart of a broadcast data transmission method according to an exemplary embodiment of the present invention.

In operation S1710, service composition information of a broadcast service to be provided using broadcast packets transmitted through at least one channel is generated.

In operation S1720, first signaling information indicating an ensemble in which the service composition information is to be transmitted is generated.

In operation S1730, the broadcast packet, the service composition information and the first signaling information are transmitted.

FIG. 18 is a flowchart of a broadcast data receiving method according to an exemplary embodiment of the present invention.

In operation S1810, first signaling information indicating an ensemble transmitting composition information of a broadcast service is acquired. The service composition information refers to composition information of broadcast services provided by using broadcast packets transmitted through at least one channel.

In operation S1820, service composition information is acquired based on the first signaling information.

In operation S1830, a broadcast service is provided based on the service composition information and the first signaling information.

FIG. 19 is a flowchart of a broadcast data transmission method according to another exemplary embodiment of the present invention.

In operation S1910, emergency information preferentially received by the broadcast data receiving device is acquired. The emergency information may include at least one selected from the group consisting of accident status information, weather information, and information on broadcast packet decoding. The emergency information may include at least one selected from the group consisting of type information representing a type of the emergency information, brief description information on the emergency information, and location information of an ensemble transmitting detailed description information on the emergency information.

In operation S1920, signaling information including information necessary to process a broadcast packet providing a broadcast service and including emergency information is generated.

In operation S1930, signaling information is transmitted through the FIC.

FIG. 20 is a flowchart of a broadcast data receiving method according to an exemplary embodiment of the present invention.

In operation S2010, signaling information including emergency information to be preferentially received and information necessary to process a broadcast packet providing a broadcast service is received through the FIC.

In operation S2020, emergency information is acquired from the signaling information.

Exemplary embodiments of the present invention can be written as computer programs and can be executed in general-purpose digital computers that execute the programs using a computer-readable recording medium.

Examples of the computer-readable recording medium include magnetic storage media (eg, ROM, floppy disk, hard disk, etc.) and optical recording media (eg, CD-ROM or DVD).

While the invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that modifications may be made thereto without departing from the spirit and scope of the invention as defined by the claims. and various changes in details. The exemplary embodiments should be considered in a descriptive sense only and not for purposes of limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention.

Claims (18)

1. a broadcast data transmitting method, comprising:

Produce the service composition information of broadcast service, described broadcast service is provided using at least one broadcast packet sent by least one channel, and wherein, service composition information comprises the information about broadcast service;

Produce the first signaling information, the first signaling information instruction will send the ensemble of service composition information, and wherein, ensemble is data transmission unit;

Send at least one broadcast packet described, service composition information and the first signaling information,

Wherein, the first signaling information comprises the identification number of the ensemble sending service composition information.

2. the method for claim 1, wherein, serve composition information and comprise at least one that select from the group comprising following item: for broadcast service service identifier, represent the genre information of school of broadcast service and the information of the supplier about broadcast service.

3. the method for claim 1, also comprises: for each ensemble produces the second signaling information, and described second signaling information comprises the information for the treatment of at least one broadcast packet will sent in each ensemble,

Wherein, described forwarding step also comprises: in each ensemble, send the second signaling information.

4. method as claimed in claim 3, wherein, the first signaling information comprises the internet protocol address of the second signaling information.

5. the method for claim 1, wherein the first signaling information comprises the map information between broadcast service and ensemble, in described ensemble, provide at least one broadcast packet described in described broadcast service by transmission.

6. the method for claim 1, wherein the first signaling information comprises the version information of service composition information.

7. the method for claim 1, wherein described forwarding step comprises: the service that sends in the ensemble indicated by the first signaling information forms information, and sends the first signaling information by fast information channel in dab receiver.

8. a broadcast data receiving method, comprising:

Obtain the first signaling information, described first signaling information instruction sends the ensemble of the service composition information of broadcast service, and wherein, ensemble is data transmission unit;

Service composition information is obtained based on the first signaling information;

Broadcast service is provided based on service composition information and the first signaling information,

Wherein, service composition information is the information of the composition about the broadcast service that will the broadcast packet sent by least one channel used to provide,

Wherein, the first signaling information comprises the identification number of the ensemble sending service composition information.

9. method as claimed in claim 8, wherein, serve composition information and comprise at least one that select from the group comprising following item: for broadcast service service identifier, represent the genre information of school of broadcast service and the information of the supplier about broadcast service.

10. method as claimed in claim 8, wherein, provides the step of broadcast service to comprise:

Create the list of the broadcast service provided based on service composition information;

Control the display of the list of broadcast service;

If have selected one of broadcast service in list, then access sends the ensemble providing the broadcast packet of the broadcast service of selection.

11. methods as claimed in claim 10, wherein, provide the step of broadcast service also to comprise:

Obtain the second signaling information from each ensemble, described second signaling information comprises the information of the broadcast packet for the treatment of the broadcast service providing selection;

The second signaling information process is used to provide the broadcast packet of the broadcast service of selection.

12. methods as claimed in claim 11, wherein, the first signaling information comprises the IP address of the second signaling information.

13. methods as claimed in claim 8, also comprise:

Store at least one that select from the group comprising following item: service composition information and the first signaling information;

Based on from described comprise service composition information and the first signaling information group in select described at least one creates the list of the broadcast service provided.

14. methods as claimed in claim 8, wherein, the first signaling information also comprises: broadcast service and transmission provide the map information between the ensemble of the broadcast packet of described broadcast service.

15. methods as claimed in claim 8, wherein, the first signaling information also comprises the version information of service composition information.

16. methods as claimed in claim 8, wherein, the step obtaining the first signaling information comprises: obtain the first signaling information by fast information channel in dab receiver.

17. 1 kinds of broadcast data transmitting apparatus, comprising:

Service composition information creating unit, produce the service composition information of the broadcast service using the broadcast packet sent by least one channel to provide, wherein, service composition information comprises the information about broadcast service;

Signaling information generation unit, produces the first signaling information, and the first signaling information instruction will send the ensemble of service composition information, and wherein, ensemble is data transmission unit;

Transmitting element, sends broadcast packet, service composition information and the first signaling information,

Wherein, the first signaling information comprises the identification number of the ensemble sending service composition information.

18. 1 kinds of broadcast-data receiving devices, comprising:

Signal message acquiring unit, obtains the first signaling information, and described first signaling information instruction sends the ensemble of the service composition information of broadcast service, and wherein, ensemble is data transmission unit;

Service composition information acquisition unit, obtains service composition information based on the first signaling information;

Service rendering units, provides broadcast service based on service composition information and the first signaling information,

Wherein, the broadcast packet sent by least one channel is used to provide broadcast service,

Wherein, the first signaling information comprises the identification number of the ensemble sending service composition information.