JP6468469B2 - Transmission device, transmission method, reception device, and reception method - Google Patents

Description

  The present technology relates to a transmission device, a transmission method, a reception device, and a reception method, and in particular, a transmission device, a transmission method, a reception device, and a reception method that can provide a more advanced area broadcasting service. About.

  In terrestrial digital broadcasting, a frequency band of about 6 MHz in a UHF (Ultra High Frequency) band is divided into 13 segments, of which 12 segments are broadcast for fixed terminals such as television receivers. Then, broadcasting for mobile terminals, that is, one-segment broadcasting (hereinafter also referred to as “one-segment broadcasting”) is performed in the remaining one segment.

  Currently, one-segment broadcasting, which is performed as a broadcast for mobile terminals, broadcasts the same content as a broadcast for fixed terminals, and uses a central segment of 13 segments.

  After a complete transition from terrestrial analog broadcasting to terrestrial digital broadcasting, terrestrial digital broadcasting is performed on physical channels called channels 13 to 52 in the UHF band. However, in each region, not all of the 13 to 52 channels are actually used for terrestrial digital broadcasting. Therefore, an empty channel that is a physical channel not used for terrestrial digital broadcasting is generated.

  In recent years, methods for effectively using this empty channel have been studied. One of them is to use an arbitrary segment of an empty channel and receive the broadcast wave in an area of about several tens of meters to several kilometers centered on a transmission device that transmits the broadcast wave of one-segment broadcasting in an arbitrary segment. One-seg broadcasting (hereinafter referred to as “area broadcasting”) is performed as a broadcasting area that can perform broadcasting (see, for example, Patent Document 1).

JP 2011-2111627 A

  By the way, in the case of the conventional one-seg type area broadcasting, since the transmission capacity is limited, there is a limit to the services that can be provided, but in the future, various services can be provided by the advancement of area broadcasting. It is assumed that

  However, at present, a technical method for providing a more advanced area broadcasting service has not been established.

  The present technology has been made in view of such a situation, and makes it possible to provide a more advanced area broadcasting service.

The transmission device according to the first aspect of the present technology is an application that operates on a receiver in a broadcast area that can receive broadcast waves of a broadcast service that uses part or all of the segments that constitute a frequency band for each channel. A transmission unit that generates transmission information including the transmission method, and a transmission unit that transmits the broadcast wave including the generated transmission information, and the transmission information is a Network Information Table NIT (Network Information Table) defined by a predetermined standard. ) Included in the descriptor used in the broadcast service, and when the application is transmitted by the broadcast wave, type information indicating a format of a stream including the application, and a stream or payload related to the application Is a transmission device that includes identification information for identifying a packet that transmits a packet .

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

In the transmission device and the transmission method according to the first aspect of the present technology, a receiver in a broadcast area capable of receiving broadcast waves of a broadcast service using a part or all of the segments constituting the frequency band for each channel. The transmission information including the transmission method of the application operating in is generated, and the broadcast wave including the generated transmission information is transmitted. The transmission information is arranged in a descriptor used in the broadcast service included in the NIT defined by a predetermined standard, and when the application is transmitted by the broadcast wave, a stream including the application is included. Type information indicating a format and identification information for identifying a packet transmitting a stream or payload associated with the application are included.

The receiving device according to the second aspect of the present technology is provided in a broadcasting area where a broadcast wave of a broadcasting service using a part or all of the segments constituting the frequency band for each channel transmitted from the transmitter can be received. A receiving unit that receives the broadcast wave, a first acquisition unit that acquires transmission information obtained from the broadcast wave, including a transmission method of an application that operates in a receiver in the broadcast area, and the acquired transmission A second acquisition unit that acquires the application based on information; and a control unit that controls the operation of the acquired application , wherein the transmission information is included in the NIT defined by a predetermined standard, When the application is transmitted on the broadcast wave and is placed in a descriptor used in a broadcast service, the form of the stream including the application And the identification information for identifying the packet transmitting the stream or payload associated with the application, and the first acquisition unit is arranged in a descriptor used in the broadcast service included in the NIT. The transmission information is acquired, and the second acquisition unit is identified by the type information included in the acquired transmission information and the packet transmitting the stream or payload included in the broadcast wave identified by the identification information. , A receiving device that acquires the application .

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

In the receiving device and the receiving method according to the second aspect of the present technology, broadcast waves of a broadcasting service using part or all of the segments constituting the frequency band for each channel transmitted from the transmitter can be received. In a broadcast area, the broadcast wave is received, transmission information obtained from the broadcast wave, including a transmission method of an application that operates on a receiver in the broadcast area, is acquired, and based on the acquired transmission information The application is acquired, and the operation of the acquired application is controlled. The transmission information is arranged in a descriptor used in the broadcast service included in the NIT defined by a predetermined standard, and when the application is transmitted by the broadcast wave, a stream including the application is included. Type information indicating a format and identification information for identifying a packet transmitting a stream or payload associated with the application are included. Then, the transmission information arranged in the descriptor used in the broadcast service included in the NIT is acquired, and the broadcast wave identified by the type information and the identification information included in the acquired transmission information The application is acquired from a packet that transmits a stream or a payload included in.

  According to the first aspect and the second aspect of the present technology, a more advanced area broadcasting service can be provided.

  Note 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 explaining the outline | summary of the information transmission system of this technique. It is a figure which shows the example of arrangement | positioning of additional_service_info in an area broadcast information descriptor. It is a figure explaining the meaning of the transmission information arrange | positioned at additional_service_info. It is a figure explaining allocation of a stream format classification. It is a figure which shows the example of arrangement | positioning of the transmission information in a table format. It is a figure explaining the transmission operation rule of additional_service_info. It is a figure explaining the reception process rule of additional_service_info. It is a figure explaining the outline | summary of transmission of information. It is a figure which shows the protocol stack of area broadcasting. It is a figure which shows the related image of TS logical structure and additional_service_info. It is a figure explaining the structure and request | requirement function of a receiver. It is a figure which shows the example of an application structure. It is a figure explaining the outline | summary of area broadcasting. It is a block diagram showing one embodiment of an area broadcasting system to which the present technology is applied. It is a block diagram which shows one Embodiment of the transmitter which applied this technique. It is a block diagram which shows one Embodiment of the receiver to which this technique is applied. It is a block diagram which shows the detailed structural example of a control part. It is a block diagram which shows the detailed structural example of an application server. It is a flowchart explaining a transmission process. It is a flowchart explaining a reception process. It is a flowchart explaining a reception process. It is a flowchart explaining an application delivery process. It is a figure which shows the example of arrangement | positioning of additional_service_info in an area broadcast information descriptor. It is a figure which shows the related image of TS logical structure and additional_service_info. It is a flowchart explaining a reception process. It is a flowchart explaining a reception process. It is a figure explaining the example 1 of operation using this art. It is a figure explaining the example 2 of operation using this art. It is a figure explaining the example 3 of operation using this art. 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.

<Outline of information transmission method>

  FIG. 1 is a diagram illustrating an outline of an information transmission method of the present technology.

  In terrestrial digital broadcasting, the frequency band of about 6 MHz in the UHF band is divided into 13 segments, and broadcasting for fixed terminals such as television receivers is performed in 12 segments (B layer) of them. In addition, one-segment broadcasting for mobile terminals is performed in the remaining one segment (A layer).

  In normal area broadcasting, a broadcast wave of one-segment broadcasting is transmitted in one central segment. However, since the transmission capacity is limited, there is a limit to the services that can be provided. Therefore, in the present technology, information used in an application for providing a more advanced area broadcasting service (hereinafter referred to as “additional information”) is defined and transmitted using 12 segments or 13 segments in the B layer. Like to do. Information indicating the transmission method of the application and additional information (hereinafter referred to as “transmission information”) is transmitted in one central segment.

  A receiving device such as a portable terminal receives additional information and transmission information along with the content of one-segment broadcasting from a transmitting device capable of transmitting area broadcasting. The receiving device acquires the application and additional information according to the received transmission information.

  Here, the application has a function of decoding additional information, a function of managing position information, and the like. The application is provided by an area broadcaster or the like, but may be provided by an application server connected to the Internet in addition to being sent in a broadcast wave. Further, the additional information includes AV (Audio Visual) streaming in PES (Packetized Elementary Stream) format, various data in IP (Internet Protocol) format, and the like, and is sent in broadcast waves.

  Then, by executing applications using various types of additional information in the receiving device, a user who has the receiving device can receive provision of a more advanced area broadcasting service. Therefore, it can be said that the application is an additional information compatible application.

<First Embodiment>
<Detailed contents of each information>

  Next, the detailed contents of the application, additional information, and transmission information will be described with reference to FIGS.

(Placement of additional_service_info in the area broadcast information descriptor)
FIG. 2 shows an arrangement example of additional_service_info in the area broadcast information descriptor.

  The additional_service_info in which the transmission information is described can be arranged in an area broadcast information descriptor for area broadcasting. However, FIG. 3 shows the meaning of each piece of transmission information described in additional_service_info, and will be described with reference to it as appropriate.

  num_of_application_info consists of an 8-bit field. This 8-bit field indicates the number of subsequent application information loops.

  application_broadcast_distribution_flag consists of a 1-bit field. This 1-bit field indicates that the application corresponding to application_id is transmitted in the broadcast stream.

  application_internet_distribution_flag consists of a 1-bit field. This 1-bit field indicates that the application corresponding to application_id can be acquired via communication.

  application_id consists of a 30-bit field. This 30-bit field indicates the id of the application.

  However, the application security level (protection level) information may be included in the structure of application_id in the upper bits of the 30-bit field. For example, when “00” is designated in the upper 2 bits, it indicates that the application is free and not encrypted. Further, when “01” is designated in the upper 2 bits, it indicates that the application is free and encrypted.

  For example, when “10” is designated in the upper 2 bits, this indicates that the application is charged and level 1 encryption is performed. Further, when “11” is designated in the upper 2 bits, it indicates that the application is charged and level 2 encryption is performed. In addition, although it is an encryption level, the encryption strength can be made higher in level 2 than in level 1, for example.

  src_path_length consists of an 8-bit field. This 8-bit field indicates the description length of a URI (Uniform Resource Identifier) that refers to an external application. Src_path indicates a URI for referring to an external application. That is, when the flag of application_internet_distribution_flag is set, src_path having a description length specified by src_path_length is described as an application acquisition destination. For example, the URI of the application server is described in src_path.

  PCR_PID indicates the PID of a PCR (Program Clock Reference) that is referred to by the application. However, “0x1FFF” is described when PCR is not referred to.

  num_of_stream_info indicates the number of loops of stream information used in the application.

  The stream_type consists of an 8-bit field. This 8-bit field indicates the format of the stream. For example, the stream format can follow the allocation of the stream format type in FIG. Elementary_PID indicates the PID of a TS packet that transmits a related ES (Elementary Stream) or payload.

  reserved indicates that it may be defined for future expansion. For example, the protection level of the stream can be defined in reserved. In this case, by defining stream_security_info as 2-bit information in the reserved bits, stream protection level information such as the presence / absence of encryption and the encryption level is specified, for example.

  For example, when “00” is specified in stream_security_info, this indicates that the stream is not encrypted. When “01” is designated, this indicates that the stream is encrypted at level 1. Also, for example, when “10” is specified in stream_security_info, the stream is encrypted at level 2, and when “11” is specified, the stream is encrypted at level 3. It shows that. In addition, although it is an encryption level, it can be set as a thing with higher encryption strength, for example, the level with a larger number.

  Note that the arrangement shown in FIG. 2 is an example. For example, as shown in FIG. 5, other arrangement forms such as arrangement of transmission information in a table format may be adopted. In FIG. 5, additional_service_table () and application_information_descriptor () are defined and transmission information is arranged. However, the meaning of each piece of information of the transmission information arranged in the table format of FIG. 5 is the same as the contents of FIG.

(Handling of additional_service_info on the sender and receiver)
Next, the handling of additional_service_info in the transmission device on the transmission side and the reception device on the reception side will be described with reference to FIGS.

(Transmission operation rules)
FIG. 6 is a diagram for explaining a transmission operation rule of additional_service_info ().

  The transmission apparatus performs transmission operation according to the following operation rule for each piece of transmission information shown in FIG.

  num_of_application_info describes the number of application information loops.

  In application_broadcast_distribution_flag, “1” is described when the application corresponding to application_id transmits in the broadcast stream.

  In application_internet_distribution_flag, "1" is described when the application corresponding to application_id can be acquired via communication.

  application_id describes the id of the application. However, the upper bits may be assigned to the protection level of the application.

  In src_path_length, describe the description length of the URI that refers to the external application that follows. In src_path, URI for referring to the external application is described.

  PCR_PID describes the PID of the PCR that is referenced in the application.

  In num_of_stream_info, the number of loops of stream information used in the application is described.

  In stream_type, the stream format identification of the target ES is described. However, the stream format follows the allocation of the stream format type in FIG. Also, elementary_PID describes the PID of the TS packet that transmits the related ES or payload.

  When stream protection level information is specified using the reserved bit, stream protection level information is described in stream_security_info.

  As described above, the transmission apparatus transmits additional_service_info according to the above-described transmission operation rule (FIG. 6), so that the reception apparatus can process additional_service_info according to a reception processing rule (FIG. 7) described later.

(Reception processing rules)
FIG. 7 is a diagram for explaining a reception processing rule for additional_service_info ().

  The receiving apparatus performs reception processing according to the following processing rule for each piece of transmission information shown in FIG.

  num_of_application_info is determined to be the number of loops in which application information is described.

  When application_broadcast_distribution_flag is “0”, it is determined that the application corresponding to application_id is not transmitted in the broadcast stream. On the other hand, when application_broadcast_distribution_flag is “1”, it is determined that the application corresponding to application_id is transmitted in the broadcast stream (ES whose stream_type is “0x91”).

  When application_internet_distribution_flag is “0”, it is determined that the application corresponding to application_id cannot be acquired via communication. Further, it is determined that there is no reference destination URI information of the application. On the other hand, when application_internet_distribution_flag is “1”, it is determined that the application corresponding to application_id can be acquired via communication. Also, it is determined that the reference URI information of the application exists.

  It is determined that application_id is the id of the application. However, when the upper bits are assigned to the protection level of the application, the upper bits are determined as the protection level information of the application.

  It is determined that src_path_length is the description length of the URI that refers to the external application that follows. Further, src_path is determined to be URI information for referring to an external application.

  PCR_PID is determined to be the PID of the PCR referenced by the application.

  It is determined that num_of_stream_info is the number of loops of stream information used in the application.

  It is determined that stream_type is the stream format identification of the target ES. The stream format type shown in FIG. 4 is assigned to the stream format. The elementary_PID is determined to be the PID of the TS packet that transmits the related ES or payload.

  stream_security_info is determined to be the protection level of the stream. However, stream_security_info may not be specified.

  Thus, in the receiving apparatus, additional_service_info sent from the receiving apparatus according to the above-described sending operation rule (FIG. 6) is processed according to the receiving process rule (FIG. 7).

(Outline of information transmission)
FIG. 8 is a diagram for explaining an outline of information transmission.

  In FIG. 8, a stream of a normal area broadcast service (hereinafter also referred to as “one-segment service”) and a stream of an advanced area broadcast service (hereinafter also referred to as “one-segment additional information service”) are multiplexed. An example of transmission is shown.

  In the one-segment service stream, AV streaming data for normal area broadcasting is encoded and multiplexed in accordance with an encoding method such as MPEG (Moving Picture Experts Group). In addition, BCML (Broadcast Contents Markup Language) and BML (Broadcast Markup Language) streams are appropriately multiplexed in this stream.

  In addition, PES format data or IP format data is multiplexed in the stream of the one-segment additional information service. That is, AV streaming data is encoded in accordance with an encoding method such as MPEG, and converted into PES format data. On the other hand, data in various file formats is encapsulated by IP in accordance with, for example, IP over MPEG2-TS, which is a technique for passing IP through a broadcast network, and is converted into IP format data. As shown in FIG. 8, the file format data includes data such as video, audio, binary, text, and application.

  Then, the one-seg service stream and the one-seg additional information service stream are remultiplexed, further modulated, and then transmitted as an RF (Radio Frequency) signal.

  However, the one-seg service stream is transmitted in one segment (A layer) together with PSI / SI and the like, and the one-seg additional information service stream is a plurality of segments such as 12 segments (B layer), 13 segments, or three layers, for example It is sent using the segment of the hierarchy. That is, the stream of the one-segment additional information service is sent out of all 13 segments or segments in an arbitrary layer. Although details will be described later, PSI / SI includes transmission information. It is assumed that these data are transmitted in accordance with the “advanced area broadcasting” protocol stack shown in FIG.

(Related image of TS logical structure and additional_service_info)
FIG. 10 is a diagram illustrating a relation image between the TS logical structure and additional_service_info.

  As shown in FIG. 10, TS (Transport Stream) includes data of layer A and layer B multiplexed. The A layer includes PSI / SI (Program Specific Information / Service Information) in addition to the one-segment service stream. PSI / SI includes PMT and NIT. A PMT (Program Map Table) stores PIDs such as video data and audio data included in the program.

  NIT (Network Information Table) stores information about the network to be transmitted, such as channel numbers, modulation schemes, guard intervals, and the like. The NIT includes an area broadcast information descriptor. For example, the area broadcast information descriptor describes information related to a transmission device that transmits a broadcast wave of area broadcast. As described above, additional_service_info is described in the area broadcast information descriptor. As described above, since additional_service_info is arranged in the NIT, it is possible to reduce the influence on the existing receiving apparatus by adding additional_service_info.

  FIG. 10 shows a case where two types of applications, application A (Application type A) and application B (Application type B), are described in the application information loop as a description example of additional_service_info.

  Since application_broadcast_distribution_flag = "1" and application_internet_distribution_flag = "0" are described in the loop 1 of application information, it indicates that application A with application_id = "0x00000010" is transmitted in the broadcast stream. . Since PCR_PID = "0x602", the PID of PCR is "0x602".

  In the stream information loop 1, “0x1B” (AVC), “0x0F” (AAC), and “0x91” (ULE) are described as stream_type. Further, “0x600”, “0x601”, and “0x800” are described as elementary_PIDs for these stream_types. And since the data of the B hierarchy corresponding to PID = "0x600", "0x601", "0x602", "0x800" is already held in the storage area, various data are acquired therefrom. .

  In this example, an ES with PID = "0x602" is extracted to obtain a PCR. Also, an ES with stream_type = "0x91" (ULE) with PID = "0x800" is extracted, and application A is acquired. Furthermore, stream_type = "0x1B" (AVC) ES with PID = "0x600" is extracted, and stream_type = "0x0F" (AAC) ES with PID = "0x601" is extracted as additional information AV streaming data is acquired.

  In the application information loop 2, application_broadcast_distribution_flag = "0" and application_internet_distribution_flag = "1" are described, which indicates that application B with application_id = "0x10000011" can be acquired via communication. Also, since src_path = "http://abcd.com" is obtained, application B is acquired via communication by accessing the application server having the URI "http://abcd.com". . Furthermore, since PCR_PID = "0x1FFF", the PID of PCR is "0x1FFF".

  In the loop 2 of the stream information, “0x91” (ULE) and “0x91” (ULE) are described as stream_type. Also, “0x800” and “0x801” are specified as elementary_PIDs for those stream_types. Since the data of the B hierarchy corresponding to PID = “0x800” and “0x801” is already held in the storage area, various data are acquired therefrom.

  In this example, stream_type = "0x91" (ULE) with PID = "0x800" is extracted, and stream_type = "0x91" (ULE) with PID = "0x801" is extracted. Data in a file format such as video and audio as additional information is acquired.

  Note that the data storage method of the storage area is arbitrary. For example, either the method of holding all the data, selecting automatically using various information, or specifying by the application is adopted. can do.

(Receiver configuration and required functions)
FIG. 11 is a diagram for explaining the configuration and request function of the receiving apparatus.

  As shown in FIG. 11, the receiving device is required to have six functions: a basic function, an additional information extraction function, a file processing function, an information presentation function, a channel selection control function, and a log function. .

  As a basic function, for example, a function for performing tuning control for a tuner is required. The tuner is required to have a tuner for full segment broadcasting in addition to one-segment broadcasting. Further, as the additional information extraction function, a function of acquiring additional information from the target ES using additional_service_info arranged in the area broadcast information descriptor included in the PSI / SI is required.

  As the file processing function, for example, a function for processing data in a file format sent according to IP over MPEG2-TS is required. In addition, as an information presentation function, a presentation process by an application, a drawing process, a channel selection control process, or the like is required. In FIG. 12, detailed contents of the application structure are described.

  As a channel selection control function, for example, a channel selection function by a channel selection application (channel selection application) using channel selection information acquired from an external server or the like, position information acquired by GPS (Global Positioning System), etc. The communication cooperation function etc. which used is required. As the log function, a function for accumulating various logs is required.

  The six functions described here are merely examples, and other functions may be added according to the operation, and functions that are not necessarily required depending on the operation, such as a log function, are included. Yes.

<Outline of area broadcasting>

  Next, a specific configuration example in the first embodiment will be described with reference to FIGS.

  Here, first, an overview of area broadcasting will be described with reference to FIG. However, in FIG. 13, in addition to the area broadcast stations 3-1 to 3-3 that transmit broadcast waves of area broadcast, the terrestrial broadcast station 2 that performs normal one-segment broadcast is shown. Further, it is assumed that the receiving device 20 such as a portable terminal has the function shown in FIG.

  The terrestrial broadcasting station 2 is a broadcasting station that performs terrestrial digital broadcasting. The terrestrial broadcasting station 2 performs broadcasting for fixed terminals in 12 segments and broadcasting for mobile terminals (normal one-segment broadcasting) in one segment.

  The area broadcasting stations 3-1 to 3-3 are transmitting devices (transmitting devices 10 in FIG. 14 and the like to be described later) that transmit area broadcast broadcast waves, and each of any one or more segments of an empty channel of terrestrial digital broadcasting. Each broadcasts an area broadcast wave.

That is, the area broadcasting station 3-1 performs area broadcasting that can be received only in the broadcasting area A. The area broadcasting station 3-2 performs area broadcasting that can be received only in the broadcasting area B, and the area broadcasting station 3-3 performs area broadcasting that can be received only in the broadcasting area C. Here, the area broadcast includes, for example, a broadcast related to the theme park that can be received only at the theme park, a broadcast related to a store that can be received only in a certain ward or city, and the like. In area broadcasting, area broadcasting stations that do not have overlapping broadcast areas can broadcast in the same segment.

  That is, for example, in FIG. 13, the broadcast area A and the broadcast area B do not overlap, so the area broadcast station 3-1 in the broadcast area A and the area broadcast station 3-2 in the broadcast area B are the same. Area broadcasting can be performed in this segment. In FIG. 13, since the broadcast area B and the broadcast area C do not overlap, the area broadcast station 3-2 in the broadcast area B and the area broadcast station 3-3 in the broadcast area C have the same segment. With this, area broadcasting can be performed.

  However, in FIG. 13, since the broadcast area A and the broadcast area C partially overlap, the area broadcast station 3-1 in the broadcast area A and the area broadcast station 3-3 in the broadcast area C The same segment cannot be used for area broadcasting (as long as broadcasting is performed simultaneously).

  The receiving device 20 is a receiving device that can receive, for example, both normal one-segment broadcasting and area broadcasting. For example, as shown in FIG. 13, when the user who has the receiving device 20 is in the broadcast area A, the receiving device 20 performs both normal one-segment broadcasting and area broadcasting by the area broadcasting station 3-1 in the broadcasting area A. Can be received. In the following description, only processing for receiving apparatus 20 to receive area broadcasts will be described.

<Configuration of area broadcasting system>

  FIG. 14 is a block diagram illustrating an embodiment of an area broadcasting system to which the present technology is applied. As illustrated in FIG. 14, the area broadcasting system 1 includes a transmission device 10, a reception device 20, and an application server 30. The receiving device 20 and the application server 30 are connected to each other via the Internet 90.

  The transmission device 10 transmits a broadcast wave of area broadcasting. However, as shown in FIG. 13, the broadcast wave of the area broadcast transmitted from the transmitter 10 can be received only in a predetermined broadcast area.

  The transmission device 10 transmits the above-described additional information and transmission information together with the area broadcast content in the broadcast wave of the area broadcast. However, when transmitting the application in the broadcast stream, the transmission device 10 can transmit the application including the broadcast wave.

  The receiving device 20 is, for example, a mobile terminal with a built-in tuner such as a mobile phone, a smartphone, or a tablet terminal device. The receiving device 20 receives the broadcast wave of the area broadcast from the receiving device 20 when the user having the receiving device 20 is in the broadcasting area of the transmitting device 10.

  The receiving device 20 displays the content video obtained from the broadcast wave of the area broadcast on the display, and outputs sound synchronized with the video from the speaker.

  In addition, the receiving device 20 acquires additional information and transmission information from broadcast waves of area broadcasting. The receiving device 20 acquires an application according to the acquired transmission information. Specifically, when the application is transmitted by being included in the broadcast wave, the receiving device 20 acquires the application from the broadcast wave according to the transmission information. When the application is transmitted via communication, the receiving device 20 accesses the application server 30 via the Internet 90 according to the transmission information, and acquires the application.

  Then, the reception device 20 executes an application using the additional information, and the video is displayed on the display together with the video of the area broadcast content, for example. However, when the additional information includes audio data, audio synchronized with the video is output from the speaker.

  The application server 30 provides an application via the Internet 90 in response to a request from the receiving device 20.

  In FIG. 14, only one receiving device 20 is illustrated for the sake of simplicity, but actually, the area broadcasting system 1 is configured to include a plurality of receiving devices 20. The receiving device 20 receives the area broadcast content from the transmitting device 10.

  The area broadcasting system 1 is configured as described above.

<Configuration example of each device>

Next, with reference to the block diagrams of FIGS. 15 to 18, configuration examples of the respective devices constituting the area broadcasting system 1 of FIG. 14 will be described.

(Configuration example of transmitter)
FIG. 15 is a block diagram illustrating a detailed configuration example of the transmission device 10 of FIG. In FIG. 15, a transmission apparatus 10 includes a transmission information acquisition unit 101, a video data acquisition unit 102, a video encoder 103, an audio data acquisition unit 104, an audio encoder 105, a file data acquisition unit 106, a file processing unit 107, a multiplexer 108, and a transmission. The unit 109 and the antenna 110 are included.

  The transmission information acquisition unit 101 acquires transmission information by generating transmission information indicating a transmission method of additional information, and supplies the transmission information to the multiplexer 108. However, transmission information is described in additional_service_info arranged in the area information descriptor, and is included in PSI / SI (NIT).

  The video data acquisition unit 102 acquires video data of a one-segment service from a built-in HDD (Hard Disk Drive), an external server, a camera, and the like, and supplies the video data to the video encoder 103. Further, when sending AV streaming data of the one-segment additional information service, the video data acquisition unit 102 acquires the video data from an external server, camera, or the like and supplies the video data to the video encoder 103.

  The video encoder 103 encodes the video data supplied from the video data acquisition unit 102 in accordance with an encoding method such as MPEG, and supplies the encoded data to the multiplexer 108.

  The audio data acquisition unit 104 acquires audio data of the one seg service from a built-in HDD, an external server, a microphone, or the like, and supplies it to the audio encoder 105. Also, the audio data acquisition unit 104 acquires the audio data from an external server, microphone, or the like when supplying AV streaming data of the one-segment additional information service, and supplies the audio data to the audio encoder 105.

  The audio encoder 105 encodes the audio data supplied from the audio data acquisition unit 104 in accordance with an encoding method such as MPEG, and supplies the encoded data to the multiplexer 108.

  When sending the file format data of the one-segment additional information service, the file data acquisition unit 106 receives the file format data such as video, audio, binary, text, application, etc. from the built-in HDD or an external server. Obtained and supplied to the file processing unit 107. However, the application is acquired only when it is included in the broadcast wave and is not acquired when it is transmitted via communication.

  The file processing unit 107 converts the data in the file format supplied from the file data acquisition unit 106 into, for example, IP format data according to IP over MPEG2-TS, and supplies the data to the multiplexer 108.

  The multiplexer 108 includes various data such as PSI / SI including transmission information from the transmission information acquisition unit 101, video data from the video encoder 103, audio data from the audio encoder 105, and IP format from the file processing unit 107. Is multiplexed to generate a TS, which is supplied to the transmission section 109.

  The transmission unit 109 transmits the TS supplied from the multiplexer 108 via the antenna 110 in a predetermined segment.

  However, as shown in FIG. 8, the AV streaming data of the one-segment service is transmitted in one segment (layer A) together with PSI / SI including transmission information, and the AV streaming data and IP of the one-segment additional information service Format data, that is, application and additional information data is transmitted in, for example, 12 segments (B layer) or 13 segments.

  The transmission device 10 is configured as described above.

(Configuration example of receiving device)
FIG. 16 is a block diagram illustrating a detailed configuration example of the reception device 20 of FIG. In FIG. 16, the receiving device 20 includes an antenna 201, a tuner 202, a demultiplexer 203, a video decoder 204, a selection unit 205, a display 206, an audio decoder 207, a speaker 208, a browser 209, a control unit 210, an operation unit 211, and The communication unit 212 is configured.

  The antenna 201 receives a UHF band broadcast wave from the transmission device 10 and supplies a broadcast signal obtained by receiving the broadcast wave to the tuner 202.

  The tuner 202 selects (demodulates) an area broadcast (signal) of a predetermined logical channel from the broadcast signal from the antenna 201 in accordance with the control from the control unit 210, and sends the resulting TS to the demultiplexer 203. Supply.

  The demultiplexer 203 separates the TS supplied from the tuner 202 into various data such as PSI / SI, video data, audio data, IP format data, and the like according to control from the control unit 210. The demultiplexer 203 supplies various data such as PSI / SI to the control unit 210, supplies video data to the video decoder 204, supplies audio data to the audio decoder 207, and receives IP data in accordance with control from the control unit 210. The format data is supplied to the file processing unit 213.

  The video decoder 204 decodes the video data supplied from the demultiplexer 203 by a method corresponding to the video encoder 103 (FIG. 15) according to the control from the control unit 210. The video data obtained by this decoding is supplied to the selection unit 205 when it is AV streaming data of the one-segment service, and is supplied to the browser 209 when it is AV streaming data of the one-segment additional information service. The

  The selection unit 205 selects video data supplied from the video decoder 204 or video data supplied from the browser 209 in accordance with control from the control unit 210 and supplies the selected video data to the display 206. The selection unit 205 supplies video data of an image such as OSD (On Screen Display) to the display 206 under the control of the control unit 210. The display 206 displays a one-seg service video or the like based on the video data supplied from the selection unit 205.

  The audio decoder 207 decodes the audio data supplied from the demultiplexer 203 by a method corresponding to the audio encoder 105 (FIG. 15) according to the control from the control unit 210. The audio data obtained by this decoding is supplied to the speaker 208 when it is AV streaming data of the one-segment service, and is supplied to the browser 209 when it is AV streaming data of the one-segment additional information service.

  The speaker 208 outputs sound corresponding to the audio data from the audio decoder 207, that is, one-seg service sound or the like.

  Under the control of the control unit 210, the file processing unit 213 processes the IP format data of the one-segment additional information service supplied from the demultiplexer 203 by a method corresponding to the file processing unit 107 (FIG. 15), and The file format data obtained by the above is supplied to the browser 209.

  The control unit 210 performs various types of processing according to an operation signal from the operation unit 211 and controls each block constituting the reception device 20.

  Further, the control unit 210 acquires an application in accordance with transmission information included in the PSI / SI NIT supplied from the demultiplexer 203 and supplies the acquired application to the browser 209. Specifically, when the application is included in the broadcast wave and transmitted according to the transmission information, the control unit 210 controls the demultiplexer 203 to acquire the application data from the IP format data, and sends it to the browser 209. Supply. In addition, when an application is sent via communication according to the transmission information, the control unit 210 controls the communication unit 212 to access the application server 30 via the Internet 90 to acquire the application and supply it to the browser 209. .

  An application is supplied to the browser 209 from the file processing unit 213 or the control unit 210. The browser 209 is supplied with AV streaming data of the one-segment additional information service from the video decoder 204 and the audio decoder 207 and data in the file format of the one-segment additional information service from the file processing unit 213 as additional information data. .

  The browser 209 executes an application using additional information in accordance with control from the control unit 210. The browser 209 supplies video data of the application to the selection unit 205 and also supplies audio data to the speaker 208. Thereby, for example, the video of the one-segment additional information service is displayed on the display 206, and audio synchronized with the video is output from the speaker 208.

  The operation unit 211 is operated by the user and supplies an operation signal corresponding to the operation to the control unit 210. Note that the operation unit 211 includes buttons displayed as a GUI (Graphics User Interface) on the display 206 in addition to physical buttons and the like. Further, the communication unit 212 exchanges information with various servers such as the application server 30 connected to the Internet 90 in accordance with control from the control unit 210.

  The receiving device 20 is configured as described above.

(Functional configuration example of control unit)
FIG. 17 is a block diagram illustrating a functional configuration example of a part that performs processing related to an application in the control unit 210 of FIG. In FIG. 17, the control unit 210 includes a transmission information acquisition analysis unit 251, an application acquisition unit 252, an additional information acquisition unit 253, and an application control unit 254.

  The transmission information acquisition analysis unit 251 acquires the transmission information described in additional_service_info in the area broadcast information descriptor included in the PSI / SI (NIT) separated by the demultiplexer 203. The transmission information acquisition / analysis unit 251 analyzes the acquired transmission information and supplies the analysis result to the application acquisition unit 252 and the additional information acquisition unit 253.

  The application acquisition unit 252 acquires an application according to the analysis result of the transmission information supplied from the transmission information acquisition analysis unit 251 and supplies the acquired application to the browser 209.

  Specifically, when the application_broadcast_distribution_flag described in the additional_service_info is “1”, the application acquisition unit 252 controls the demultiplexer 203 based on the stream_type, elementary_PID, and the like to set a predetermined stream (for example, stream_type is Data of the application included in ES) “0x91” is acquired and supplied to the file processing unit 213. As a result, the application sent in the broadcast wave is acquired and supplied to the browser 209.

  In addition, when the application_internet_distribution_flag described in additional_service_info is “1”, the application acquisition unit 252 controls the communication unit 212 according to the URI of src_path to access the application server 30 via the Internet 90 and execute the application. get. As a result, an application is acquired via communication and supplied to the browser 209.

  The additional information acquisition unit 253 acquires additional information according to the analysis result of the transmission information supplied from the transmission information acquisition analysis unit 251 and supplies the additional information to the browser 209.

  Specifically, the additional information acquisition unit 253 controls the demultiplexer 203 based on stream_type, elementary_PID, and the like described in additional_service_info to acquire additional information data included in a predetermined stream, and the video decoder 204 To the audio decoder 207 or the file processing unit 213. Thus, the additional information is supplied to the browser 209 after being decoded by each decoder or the like.

  The application control unit 254 controls the browser 209 to control the operation of the application using the additional information.

  The control unit 210 is configured as described above.

(Application server configuration example)
FIG. 18 is a block diagram illustrating a detailed configuration example of the application server 30 of FIG. In FIG. 18, the application server 30 includes a control unit 301, an application acquisition unit 302, an application holding unit 303, and a communication unit 304.

  The control unit 301 controls the operation of each unit of the application server 30. The application acquisition unit 302 acquires an application according to the control from the control unit 301 and records it in the application holding unit 303.

  When an application is requested from the receiving device 20, the control unit 301 reads and acquires the application from the application holding unit 303. The communication unit 304 transmits the application to the requesting receiving device 20 via the Internet 90 in accordance with the control from the control unit 301.

  The application server 30 is configured as described above.

<Details of specific processing performed in each device>

  Next, with reference to the flowcharts of FIG. 19 to FIG. 22, the contents of specific processing performed in each device constituting the area broadcasting system 1 of FIG. 14 will be described.

(Transmission process)
First, the transmission process executed by the transmission device 10 of FIG. 14 will be described with reference to the flowchart of FIG.

  In step S <b> 111, the transmission information acquisition unit 101 acquires transmission information by generating it and supplies it to the multiplexer 108. However, for example, as illustrated in FIG. 2 and the like, the additional information is arranged in additional_service_info in the area information descriptor and is included in PSI / SI (NIT).

  In step S <b> 112, the video data acquisition unit 102 acquires video data of the one-segment service or the one-segment additional information service and supplies the video data to the video encoder 103. In step S <b> 113, the video encoder 103 encodes the video data supplied from the video data acquisition unit 102 and supplies the encoded video data to the multiplexer 108.

  In step S <b> 114, the audio data acquisition unit 104 acquires audio data of the one-segment service or the one-segment additional information service and supplies the audio data to the audio encoder 105. In step S <b> 115, the audio encoder 105 encodes the audio data supplied from the audio data acquisition unit 104 and supplies the encoded audio data to the multiplexer 108.

  In step S <b> 116, the file data acquisition unit 106 acquires file format data of the one-segment additional information service and supplies the data to the file processing unit 107. In step S <b> 117, the file processing unit 107 converts the data in the file format supplied from the file data acquisition unit 106 into data in a predetermined format and supplies the data to the multiplexer 108.

  However, in steps S116 and S117, when an application is transmitted in a broadcast stream, the application file is acquired and converted into, for example, IP format data, and then supplied to the multiplexer 108. In this case, in step S111, application_broadcast_distribution_flag described in additional_service_info is “1”.

  In step S118, the multiplexer 108 performs various data such as PSI / SI including transmission information from the transmission information acquisition unit 101, video data from the video encoder 103, audio data from the audio encoder 105, and a file processing unit 107. Multiplex the IP format data from and generate TS.

  In step S119, the transmission unit 109 transmits the TS supplied from the multiplexer 108 through a predetermined segment to transmit the TS through the antenna 110, and ends the transmission process.

  This is the end of the description of the transmission process.

(Reception processing)
Next, with reference to the flowcharts of FIGS. 20 and 21, the reception process executed by the reception device 20 of FIG. 14 will be described. This reception process is performed when the user who has the reception device 20 is in the broadcast area of the transmission device 10. The channel selection information for area broadcasting is acquired from, for example, an area broadcasting station server.

  In step S211, the control unit 210 controls the tuner 202 to perform channel setting for area broadcasting.

  In step S212, the transmission information acquisition analysis unit 251 acquires additional_service_info (transmission information) described in the NIT area broadcast information descriptor included in the PSI / SI separated by the demultiplexer 203, and additional_service_info is acquired. It is determined whether it has been done (S213).

  If it is determined in step S213 that additional_service_info has been acquired, the process proceeds to step S214. In step S214, it is determined whether to use the acquired additional_service_info. This determination process of presence / absence of use is determined according to the setting contents when the user sets in advance conditions such as automatic use when entering the station. In addition, a predetermined selection screen may be presented so that the user can select whether to use or not.

  If it is determined in step S214 that additional_service_info is to be used, the process proceeds to step S216. If it is determined in step S213 that additional_service_info is not described in the area broadcast information descriptor, or if it is determined not to use additional_service_info in step S214, the process proceeds to step S215. In this case, the receiving device 20 presents a normal area broadcast program, that is, a one-seg service program (S215).

  In step S216, the control unit 210 controls the tuner 202 to determine whether or not 13 segments are being received. If it is determined in step S216 that 13 segments are not being received, the process proceeds to step S217. In step S217, the control unit 210 changes the setting of the tuner 202 so that 13 segments can be received.

  When 13 segments are being received, the process proceeds to step S218. If it is determined in step S216 that 13 segments are being received, it is not necessary to change the setting of the tuner 202, so step S217 is skipped and the process proceeds to step S218.

  In step S218, the transmission information acquisition analysis unit 251 confirms the application identification (application_id) included in the transmission information. In step S219, when the protection level information is specified in the upper 2 bits of the application identification, the transmission information acquisition analysis unit 251 confirms the protection level of the target application by confirming the upper bits. The control according to the protection level is performed.

  In step S <b> 220, the control unit 210 presents all available application information on the display 206 according to the transmission information analysis result by the transmission information acquisition / analysis unit 251. Here, for example, information such as whether or not the application is paid or free and whether or not the target application is already owned is also presented. Then, in accordance with a user operation, an application to be used (target application) is selected and set from all the applications (S221).

  In step S222 (FIG. 21), the application acquisition unit 252 determines whether the target application has already been acquired by identifying the application by application_id. If it is determined in step S222 that the target application has not been acquired, the process proceeds to step S223.

  In step S223, the application acquisition unit 252 confirms the application broadcast distribution flag (application_broadcast_distribution_flag) according to the transmission information analysis result by the transmission information acquisition analysis unit 251, and whether or not the application is transmitted by the broadcast wave according to the description content. Is determined (S224).

  If application_broadcast_distribution_flag = "1" is described in step S224 and it is determined that the application is transmitted by the broadcast wave, the process proceeds to step S225. If the application is acquired from the broadcast wave (“YES” in S225), the process proceeds to step S226.

  In step S226, the application acquisition unit 252 controls the demultiplexer 203 according to the transmission information analysis result by the transmission information acquisition analysis unit 251, and extracts the application file from the target ES to acquire the application. For example, when the application A in FIG. 10 described above is described in the application information loop, the application A is obtained by extracting the ES of stream_type = "0x91" (ULE) with PID = "0x800". Is done.

  However, when the transmission information includes stream_security_info and the stream is encrypted, the application acquisition unit 252 decrypts the encrypted stream in accordance with a predetermined decryption method, and then the application file. Will get. If it is determined in step S222 that the target application has been acquired, it is not necessary to acquire the application again, and thus steps S223 to S226 are skipped.

  In step S227, the additional information acquisition unit 253 controls the demultiplexer 203 in accordance with the analysis result of the transmission information by the transmission information acquisition analysis unit 251, extracts ES used in the target application, and acquires additional information. For example, when the application A in FIG. 10 described above is described in a loop of application information, ES of stream_type = “0x1B” (AVC) with PID = “0x600” and stream_type == PID = “0x601” By extracting the ES of “0x0F” (AAC), AV streaming data as additional information is acquired. As a result, additional information data, that is, data used in the application is acquired.

  However, if the transmission information includes stream_security_info and the stream is encrypted, the additional information acquisition unit 253 decrypts the encrypted stream in accordance with a predetermined decoding method, and then adds the additional information. The data of will be acquired.

  In step S228, the application control unit 254 controls the browser 209 to activate and execute an application acquired from the broadcast wave. As a result, an application using the additional information, that is, an application of the one-segment additional information service is presented on the display 206. The application of the one seg additional information service can be displayed together with content such as a program of the one seg service, for example.

  On the other hand, if application_broadcast_distribution_flag = "0" is described in step S224 and it is determined that the application is not transmitted by the broadcast wave, or if it is determined in step S225 that the application is not acquired from the broadcast wave, the process Advances to step S229.

  In step S229, the application acquisition unit 252 confirms the application Internet distribution flag (application_internet_distribution_flag) according to the transmission information analysis result by the transmission information acquisition analysis unit 251, and can acquire the application via communication according to the description content. It is determined whether or not (S230).

  If application_internet_distribution_flag = "1" is described in step S230 and it is determined that an application can be acquired via communication, the process proceeds to step S231. If the application is acquired via communication (“YES” in S231), the process proceeds to step S232.

  In step S232, the application acquisition unit 252 acquires an external application reference destination (src_path) according to the transmission information analysis result by the transmission information acquisition analysis unit 251. For example, when the application B in FIG. 10 described above is described in the loop of application information, src_path = "http://abcd.com" is acquired as the URI of the application server 30.

  In step S233, the application acquisition unit 252 controls the communication unit 212 according to the URI obtained from src_path, accesses the application server 30 via the Internet 90, and downloads the application.

  In step S233, when the download of the application is completed and acquired, the process proceeds to step S227.

  In step S227, as described above, the additional information acquisition unit 253 extracts the ES used in the target application and acquires the additional information. For example, when the application B in FIG. 10 described above is described in a loop of application information, ES of stream_type = “0x91” (ULE) with PID = “0x800” and stream_type == with PID = “0x801” By extracting the ES of 0x91 "(ULE), file format data such as video and audio is acquired as additional information. As a result, additional information data, that is, data used in the application is acquired.

  In step S228, the application control unit 254 controls the browser 209 to start and execute an application acquired via communication. As a result, an application using the additional information, that is, an application of the one-segment additional information service is presented on the display 206.

  If application_internet_distribution_flag = "0" is described in step S230 and it is determined that the application cannot be acquired via communication, or if it is determined not to acquire the application via communication in step S231, The process proceeds to step S215 in FIG. In this case, the receiving device 20 presents a normal area broadcast program, that is, a one-seg service program (S215).

  Then, when the process of step S215 in FIG. 20 or step S228 in FIG. 21 is completed, the reception process is terminated.

  This is the end of the description of the reception process.

(Application distribution processing)
Next, application distribution processing executed by the application server 30 in FIG. 14 will be described with reference to the flowchart in FIG.

  In step S <b> 311, the control unit 301 monitors the communication unit 304 to determine whether an application request is received from the reception device 20. In step S311, after waiting for an application request from the receiving apparatus 20, the process proceeds to step S312.

  In step S <b> 312, the control unit 301 acquires an application corresponding to the request from the receiving device 20 from the application holding unit 303. In step S <b> 313, the communication unit 304 distributes (provides) the application acquired from the application holding unit 303 to the request receiving device 20 in accordance with the control from the control unit 301. When the process of step S313 ends, the application distribution process ends.

  This is the end of the description of the application distribution process.

  The first embodiment has been described above.

<Second Embodiment>

  Next, a second embodiment will be described with reference to FIGS. In the second embodiment, as compared with the first embodiment described above, information related to application and additional information data (hereinafter referred to as “application related information”) is stored in additional_service_info in the area broadcast information descriptor. It is different in that it is not arranged but transmitted by a predetermined stream. Thus, by not describing application-related information in additional_service_info, the data size of additional_service_info can be reduced. As a result, additional_service_info can be arranged even when there is a limit to the data size that can be transmitted by PSI / SI or NIT, for example.

<Detailed contents of each information>

(Placement of additional_service_info in the area broadcast information descriptor)
FIG. 23 shows an arrangement example of additional_service_info in the area broadcast information descriptor. However, the meaning of each piece of information included in the transmission information described in additional_service_info is as described with reference to FIG. 3 described above.

  In FIG. 23, in addition to application_broadcast_distribution_flag, application_internet_distribution_flag, and application_id, stream_type, application_info, and elementary_PID are arranged in the application information loop.

  The stream_type indicates the stream format used in the application.

  application_info indicates the content of information to be transmitted in the stream specified by elementary_PID, which follows. The contents of this information include, for example, application server URI, application file name and file type, elementary_PID that transmits video data, audio data, synchronization signal, etc. used in the application, and application-related information such as stream_type .

  elementary_PID indicates a PID in which stream information used in the application is stored.

(Related image of TS logical structure and additional information)
FIG. 24 is a diagram illustrating a related image between the TS logical structure and additional_service_info.

  As shown in FIG. 24, additional_service_info is described in the area broadcast information descriptor included in the NIT. FIG. 24 shows a case where two types of applications, application A (Application type A) and application B (Application type B), are described in the application information loop as a description example of additional_service_info.

  Since application_broadcast_distribution_flag = "1" and application_internet_distribution_flag = "0" are described in the loop 1 of application information, it indicates that application A with application_id = "0x00000010" is transmitted in the broadcast stream. .

  Also, since stream_type = "0xC4", application_info = "0x01", and elementary_PID = "0x900" are described in the application information loop 1, application related information for application A is extracted from the target ES, Will be acquired. Then, based on the contents described in the application related information, an ES of stream_type = 0x91 (ULE) with PID = “0x800” is extracted, and application A is acquired. Similarly, AV streaming data as additional information is acquired by extracting the target ES.

  On the other hand, since application_broadcast_distribution_flag = "0" and application_internet_distribution_flag = "1" are described in the loop 2 of the application information, it indicates that the application B with application_id = "0x10000011" can be acquired via communication.

  In addition, since stream_type = "0xC4", application_info = "0x01", elementary_PID = "0x900" is described in the application information loop 2, application-related information for application B is extracted from the target ES, Will be acquired. Then, based on the contents described in the application related information, the application B is acquired via communication by accessing the application server having the URI “http://abcd.com”. Further, by extracting the target ES, data in a file format such as video and audio as additional information is acquired.

<Details of specific processing performed in each device>

  In 2nd Embodiment, since the structure of each apparatus which comprises the area broadcast system 1 is the same as that of 1st Embodiment mentioned above, the description is abbreviate | omitted. However, since application-related information related to the application and additional information data is transmitted by the ES, some of the processing contents of the reception processing executed by the reception device 20 are different. Then, next, with reference to the flowchart of FIG.25 and FIG.26, the reception process which the receiver 20 of 2nd Embodiment performs is demonstrated.

In steps S251 to S258 in FIG. 25, as in steps S211 to S218 in FIG. 20, additional_service_info in the NIT area broadcast information descriptor included in the PSI / SI is acquired. Various settings are made so that the additional information service can be received.
The

  In steps S259 to S266 in FIG. 26, as in steps S222 to S228 in FIG. 21, application_broadcast_distribution_flag = "1" is described in additional_service_info (transmission information) and the application is transmitted by the broadcast wave. You will get the application from.

  However, since information for acquiring the application file is not included in additional_service_info, in step S263 of FIG. 26, the application acquisition unit 252 follows the transmission information analysis result by the transmission information acquisition analysis unit 251, and demultiplexer In step 203, the application related information is acquired from the target ES. In step S264, the application acquisition unit 252 acquires the application by extracting the target ES based on the information related to the application file described in the application-related information.

  For example, when the application A in FIG. 24 described above is described in the application information loop in the additional_service_info, the application related information for the application A is acquired from the target ES. Then, based on the contents described in the application related information, an ES of stream_type = 0x91 (ULE) with PID = “0x800” is extracted, and application A is acquired. Similarly, AV streaming data as additional information is acquired by extracting the target ES (S265). Thereby, the application using the additional information, that is, the application of the one-segment additional information service is presented on the display 206 (S266).

  Also, in steps S267 to S272, S265, and S266 in FIG. 26, application_internet_distribution_flag = "1" is described in additional_service_info (transmission information) in the same manner as steps S229 to S233, S227, and S228 in FIG. Since the application can be acquired, the application is acquired via communication.

  However, since the information for acquiring the application file is not included in the additional_service_info, in step S270 of FIG. 26, the application acquisition unit 252 follows the transmission information analysis result by the transmission information acquisition analysis unit 251 according to the transmission information analysis result. In step 203, the application related information is acquired from the target ES. In step S271, the application acquisition unit 252 acquires the external application reference destination (URI) described in the application related information. Thereby, the application acquisition part 252 can access the application server 30 via the internet 90, and can download an application (S272).

  For example, when the application B in FIG. 24 described above is described in the application information loop in the additional_service_info, the application related information for the application B is acquired from the target ES. Then, based on the contents described in the application related information, the application B is acquired via communication by accessing the application server having the URI “http://abcd.com”. Further, by extracting the target ES, file format data such as video and audio is acquired as additional information (S265). Thereby, the application using the additional information, that is, the application of the one-segment additional information service is presented on the display 206 (S266).

  This is the end of the description of the reception process.

  Although not shown, in the second embodiment, the transmission device 10 places the additional_service_info shown in FIG. 23 in the area information descriptor and includes application-related information in the target ES. It will be.

  The second embodiment has been described above.

<Specific operation example>

  Next, a specific operation example using the present technology will be described with reference to FIGS. That is, by using the present technology, it is possible to provide a more advanced area broadcasting service as compared to normal area broadcasting as shown in the following operation examples 1 to 3.

(Operation Example 1)
FIG. 27 is a diagram for explaining an operation example 1 using the present technology. Operation example 1 shows an operation example at the time of a disaster.

  As shown in FIG. 27, in the receiving device 20, a channel selection application is executed. For example, channel selection information is acquired by sending positioning information obtained by the built-in GPS to the server 40 of the area broadcasting station. The receiving device 20 receives the broadcast wave of the area broadcast transmitted from the transmitting device 10 using the channel selection information. Thus, a normal area broadcast program, that is, a one-segment service program is displayed on the display 206.

  Here, for example, when a disaster such as an earthquake occurs, the provider of the one-segment additional information service creates disaster information in HTML (HyperText Markup Language) format by the terminal device 50 and provides it to the transmission device 10. In addition, when creating disaster information, information stored in various databases 51 can be referred to. The transmission device 10 arranges transmission information in additional_service_info, includes it in PSI / SI and transmits it in one segment, and transmits disaster information in HTML format as additional information in 12 segments.

  The receiving device 20 acquires transmission information from the transmitting device 10. The receiving device 20 acquires an application through a broadcast wave of area broadcasting or via communication according to the analysis result of the transmission information. In addition, the receiving device 20 acquires disaster information in HTML format as additional information from broadcast waves of area broadcasting. In the receiving device 20, the browser 209 is activated and an application using the additional information is executed, so that the disaster information as a one-segment additional information service is displayed on the display 206 together with the area broadcast program. become. As a result, the user can quickly obtain information about the disaster.

(Operation example 2)
FIG. 28 is a diagram for explaining an operation example 2 using the present technology. Operation example 2 shows an operation example of a paid service in a stadium.

  As shown in FIG. 28, the transmission apparatus 10 transmits a standard-definition video as a live video broadcast as a one-seg service program. In addition, the transmission apparatus 10 acquires high-quality live video for the one-segment additional information service and information in HTML format. Here, the information in the HTML format includes, for example, information such as stadium information, surrounding information, and traffic information. The transmission apparatus 10 arranges transmission information in additional_service_info, sends it in one segment including PSI / SI, and sends it in 12 segments as high-quality video and information in HTML format as additional information.

  In the receiving device 20, a channel selection application is executed. For example, channel selection information is acquired by sending positioning information obtained by the built-in GPS to the server 40 of the area broadcasting station. The receiving device 20 receives the broadcast wave of the area broadcast transmitted from the transmitting device 10 using the channel selection information. As a result, a standard-quality live video as a one-segment service is displayed on the display 206.

  Further, for example, when a user who has the receiving device 20 purchases a paid premium application provided by the application server 30, the premium application is downloaded to the receiving device 20. Then, the receiving device 20 executes the premier application to acquire a high-quality video, and the display 206 displays a high-quality live video as a one-segment additional information service. In the receiving device 20, information in HTML format such as stadium information can be displayed as a one-segment additional information service. In this way, the user can receive a more advanced service as long as he / she purchases a paid premium application.

  A high-quality video that can be displayed only when a premier application is purchased and related information can have a DRM (Digital Rights Management) function. For example, the DRM function is realized by assigning the upper bits of application_id arranged in additional_service_info to protection level information or defining stream_security_info.

(Operation Example 3)
FIG. 29 is a diagram for explaining an operation example 3 using the present technology. Operation example 3 shows an operation example in a downtown area, a store, traffic, and a regional service.

  As shown in FIG. 29, the transmission device 10 sends advertisements and videos of regional programs as one-segment service programs. In addition, the transmission apparatus 10 acquires premium content such as an electronic ticket and content for the one-segment additional information service, and information such as an electronic coupon and an electronic questionnaire. The transmission device 10 arranges transmission information in additional_service_info, transmits it in one segment including PSI / SI, and transmits additional information such as premium contents and electronic coupons in 12 segments.

  In the receiving device 20, a channel selection application is executed. For example, channel selection information is acquired by sending positioning information obtained by the built-in GPS to the server 40 of the area broadcasting station. The receiving device 20 receives the broadcast wave of the area broadcast transmitted from the transmitting device 10 using the channel selection information. As a result, the advertisement as the one-segment service and the video of the local program are displayed on the display 206.

  Further, for example, when a user who has the receiving device 20 purchases a paid premium application provided by the application server 30, the premium application is downloaded to the receiving device 20. Then, the premium content is acquired by executing the premier application in the receiving device 20, and the premium content as the one-segment additional information service is displayed on the display 206. In the receiving device 20, information such as an electronic coupon can be displayed as a one-segment additional information service. In this way, the user can receive a more advanced service as long as he / she purchases a paid premium application.

  Note that premium content that can be displayed only when a premium application is purchased can have a DRM function in the same manner as in the operation example 2. Also, questionnaire results and the like by the user who has the receiving device 20 are accumulated in the database 61 by the server 60.

  In FIG. 27 to FIG. 29, “API” is described, but API is an abbreviation of Application Programming Interface and does not indicate a specific interface.

  The specific operation example has been described above.

  In the above description, an example is described in which the application is configured by an HTML file and started by the browser 209. For example, the application is created in another program language such as Java (registered trademark) or a markup language. You may be made to do. Further, “additional information” in this specification may be referred to as “auxiliary information” because it can be said to be auxiliary information.

  In the above description, the receiving device 20 has been described as receiving broadcast content transmitted from the transmitting device 10. However, the receiving device 20 receives communication content distributed by a distribution server (not shown) provided on the Internet 90. Then, streaming playback may be performed. In this case, the application operates together with the communication content. For example, the communication content is AV (Audio Visual) content such as a broadcasted television program, a released movie, or an original video program distributed by VOD (Video On Demand). That is, broadcast content and communication content are examples of AV content.

<Description of computer to which this technology is applied>

  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. Here, the computer includes, for example, a general-purpose personal computer capable of executing various functions by installing a computer incorporated in dedicated hardware and various programs.

  FIG. 30 is a block diagram illustrating an example of a hardware configuration of a computer that executes the series of processes described above according to a program.

  In the computer 900, a CPU (Central Processing Unit) 901, a ROM (Read Only Memory) 902, and a RAM (Random Access Memory) 903 are connected to each other by a bus 904.

  An input / output interface 905 is further connected to the bus 904. An input unit 906, an output unit 907, a recording unit 908, a communication unit 909, and a drive 910 are connected to the input / output interface 905.

  The input unit 906 includes a keyboard, a mouse, a microphone, and the like. The output unit 907 includes a display, a speaker, and the like. The recording unit 908 includes a hard disk, a nonvolatile memory, and the like. The communication unit 909 includes a network interface or the like. The drive 910 drives a removable medium 911 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

  In the computer 900 configured as described above, for example, the CPU 901 loads the program stored in the recording unit 908 to the RAM 903 via the input / output interface 905 and the bus 904 and executes the program, as described above. A series of processing is performed.

  The program executed by the computer 900 (CPU 901) can be provided by being recorded on a removable medium 911 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 900, the program can be installed in the recording unit 908 via the input / output interface 905 by attaching the removable medium 911 to the drive 910. Further, the program can be received by the communication unit 909 via a wired or wireless transmission medium and installed in the recording unit 908. In addition, the program can be installed in the ROM 902 or the recording unit 908 in advance.

  Note that the program executed by the computer 900 may be a program that is processed in time series in the order described in this specification, or a necessary timing such as when a call is made in parallel. It may be a program in which processing is performed.

  Here, in the present specification, the processing steps for describing a program for causing the computer 900 to perform various processes do not necessarily have to be processed in time series in the order described in the flowchart, and may be performed in parallel or individually. (For example, parallel processing or object processing).

  Further, the program may be processed by one computer, or may be distributedly processed by a plurality of computers. Furthermore, the program may be transferred to a remote computer and executed.

  Furthermore, in this specification, the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Accordingly, a plurality of devices housed in separate housings and connected via a network and a single device housing a plurality of modules in one housing are all systems. .

  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.

  For example, the present technology can take a configuration of cloud computing in which one function is shared by a plurality of devices via a network and jointly processed.

  In addition, each step described in the above-described flowchart can be executed by being shared by a plurality of apparatuses in addition to being executed by one apparatus.

  Further, when a plurality of processes are included in one step, the plurality of processes included in the one step can be executed by being shared by a plurality of apparatuses in addition to being executed by one apparatus.

  1 area broadcasting system, 10 transmitting device, 20 receiving device, 30 application server, 90 internet, 101 transmission information acquiring unit, 102 video data acquiring unit, 104 audio data acquiring unit, 106 file data acquiring unit, 109 transmitting unit, 202 tuner 209 Browser, 210 control unit, 212 communication unit, 251 transmission information acquisition analysis unit, 252 application acquisition unit, 253 additional information acquisition unit, 254 application control unit, 212 communication unit, 301 control unit, 302 application acquisition unit, 304 communication Part, 900 computer, 901 CPU

Claims (18)

Generating unit for generating transmission information including a transmission method of an application operating in a receiver in a broadcast area capable of receiving a broadcast wave of a broadcast service using a part or all of the segments constituting a frequency band for each channel When,
A transmission unit for transmitting the broadcast wave including the generated transmission information ,
The transmission information is
Placed in the descriptor used in the broadcast service included in the NIT (Network Information Table) defined by a predetermined standard,
When the application is transmitted on the broadcast wave, it includes type information indicating a format of a stream including the application and identification information for identifying a packet transmitting a stream or a payload associated with the application.
Transmitter device. The transmission apparatus according to claim 1, wherein the transmission information includes a URI (Uniform Resource Identifier) indicating an acquisition destination of the application when the application is transmitted via communication.   The transmission information is arranged in additional service information described by the descriptor according to the operation.
  The transmission device according to claim 1.   The descriptor is an area broadcast information descriptor related to area broadcast,
  The additional service information is additional_service_info.
  The transmission device according to claim 3.   The application has a tuning control function for the broadcast service.
  The transmission device according to claim 1.   The application performs channel selection control using an API (Application Programming Interface).
  The transmission device according to claim 5. An acquisition unit for acquiring additional information used by the application;
The generation unit generates the transmission information including the acquired transmission method of the additional information together with the transmission method of the application,
The transmission device according to claim 1, wherein the transmission unit transmits the broadcast wave including the transmission information and the additional information. The broadcast wave is
The frequency band is divided into 13 segments,
The transmission apparatus according to claim 7, wherein the transmission information is included in any one segment among the 13 segments, and the additional information is included in all segments or segments in any layer. In the transmission method of the transmission device,
The transmitting device is
Generating transmission information including a transmission method of an application operating in a receiver in a broadcast area capable of receiving broadcast waves of a broadcast service using a part or all of the segments constituting the frequency band for each channel;
Transmitting the broadcast wave including the generated transmission information ;
The transmission information is
Placed in the descriptor used in the broadcasting service, included in the NIT defined by a predetermined standard,
When the application is transmitted by the broadcast wave, a transmission method including type information indicating a format of a stream including the application and identification information for identifying a packet transmitting a stream or a payload associated with the application . In a broadcast area capable of receiving broadcast waves of a broadcast service using a part or all of the segments constituting the frequency band for each channel transmitted from the transmitter, a receiving unit that receives the broadcast waves;
A first acquisition unit that acquires transmission information including a transmission method of an application that is obtained from the broadcast wave and operates in a receiver in the broadcast area;
A second acquisition unit that acquires the application based on the acquired transmission information;
A control unit for controlling the operation of the acquired application ,
The transmission information is
Placed in the descriptor used in the broadcasting service, included in the NIT defined by a predetermined standard,
When the application is transmitted on the broadcast wave, it includes type information indicating a format of a stream including the application, and identification information for identifying a packet transmitting a stream or a payload associated with the application,
The first acquisition unit acquires the transmission information arranged in a descriptor used in the broadcast service included in the NIT,
The second acquisition unit acquires the application from a packet transmitting a stream or payload included in the broadcast wave identified by the type information and the identification information included in the acquired transmission information.
Receiver device. The transmission information, when the application is transmitted via communication, includes a URI indicating the acquisition destination of the application,
The receiving device according to claim 10, wherein the second acquisition unit accesses a server on a network and acquires the application based on the URI included in the acquired transmission information .   The transmission information is arranged in additional service information described by the descriptor according to the operation.
  The receiving device according to claim 10.   The descriptor is an area broadcast information descriptor related to area broadcast,
  The additional service information is additional_service_info.
  The receiving device according to claim 12.   The application has a tuning control function for the broadcast service.
  The receiving device according to claim 10.   The application performs channel selection control using an API.
  The receiving device according to claim 14. The transmission information further includes a transmission method of additional information used by the application together with a transmission method of the application,
A third acquisition unit for acquiring the additional information obtained from the broadcast wave based on the acquired transmission information;
The receiving device according to claim 10, wherein the control unit controls an operation of the application using the acquired additional information. The broadcast wave is
The frequency band is divided into 13 segments,
The receiving apparatus according to claim 16, wherein the transmission information is included in any one segment among the 13 segments, and the additional information is included in all segments or segments in any layer. In the receiving method of the receiving device,
The receiving device is
In the broadcast area where a broadcast wave of a broadcast service using a part or all of the segments constituting the frequency band for each channel transmitted from the transmitter can be received, the broadcast wave is received,
Obtained from the broadcast wave, transmission information including the transmission method of the application operating in the receiver in the broadcast area,
Based on the acquired transmission information, acquire the application,
Control the operation of the acquired application,
The transmission information is
Placed in the descriptor used in the broadcasting service, included in the NIT defined by a predetermined standard,
When the application is transmitted on the broadcast wave, it includes type information indicating a format of a stream including the application, and identification information for identifying a packet transmitting a stream or a payload associated with the application,
Obtaining the transmission information arranged in a descriptor used in the broadcast service included in the NIT;
A receiving method for acquiring the application from a packet transmitting a stream or a payload included in the broadcast wave identified by the type information and the identification information included in the acquired transmission information .

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