JP7350813B2 - receiving device - Google Patents

Description

Embodiments of the present invention relate to a broadcast signal receiving device.

The multimedia service in advanced BS digital broadcasting and advanced wideband CS digital broadcasting is a general term for subtitle service, superimposed text service, and data content service, and is performed according to the operational regulations of Non-Patent Document 1 and Non-Patent Document 2.
Data content service, which is one type of multimedia service, is one type of broadcasting service that simultaneously provides application functions such as HTML in addition to video and audio broadcasting services.

The data content service is added to the program of the broadcast signal by placing an application service descriptor in the MPT (MMT Package Table), which is one of the control information included in the broadcast signal. Show that there is. The application service descriptor is a descriptor that describes entry information of an application related to a service.

"Standard for media transport method using MMT in digital broadcasting" ARIB STD-B60 1.12 version Revised on April 12, 2018, Radio Industries Association “Advanced Wideband Satellite Digital Broadcasting Operation Regulations Technical Data” ARIB TR-B39 1.7 edition Revised April 12, 2018, Radio Industries Association

As stated in Non-Patent Document 2, only one application service descriptor is always placed in the MPT descriptor area of the MPT of a broadcasting service accompanied by a data content service.
However, in the future, if data content services become more sophisticated, such as by upgrading the application format, which is one of the fields in the application service descriptor, it will be necessary to provide data content services that match the capabilities of the television receiving device. It is conceivable that a plurality of application service descriptors are placed in the MPT descriptor area of the MPT.

Therefore, it is an object of the broadcast signal receiving device according to the embodiment of the present invention to provide a receiving device that uses MPT and application service descriptors that correspond to the high functionality of data content services.

According to the embodiment, in a receiving device that receives a broadcast signal obtained by multiplexing a video signal and an audio signal of a broadcast program, and control information that gives an application function to the broadcast program using the MMT/TLV method,
The broadcast signal includes location information from which an AIT (Application Control Information Table) of the application function can be obtained, an application encoding method used in the application function, and information on the resolution of data content used in the application function. The control information includes an application service descriptor and an extended application service descriptor that includes information that extends the application encoding method used in the data content service or information that extends the resolution of the data content, and
Receiving means for receiving the broadcast signal;
means for determining whether the extended application service descriptor is located in the control information included in the broadcast signal;
When the extended application service descriptor is placed in the control information, the extended application service descriptor whose application encoding method is 0x1 is placed first from the control information included in the broadcast signal. means for obtaining an extended application service descriptor;
A receiving device is provided, comprising: a control means for controlling the application function using the location information, the application encoding method, and the resolution of the data content of the acquired extended application service descriptor.

FIG. 1 is a diagram showing an example of the overall system configuration of a broadcast signal transmitting device, a content server, a broadcast signal receiving device, and a communication network according to an embodiment of the present invention. FIG. 2 is a diagram schematically showing the configuration of a broadcast signal transmitting device. FIG. 3 is a diagram schematically showing the configuration of a broadcast signal receiving device. FIG. 4 is a diagram showing the syntax of MPT. FIG. 5 is a diagram showing the syntax of an application service descriptor. FIG. 6A is a list showing settable values defined in the application_format field and document_resolution field of the application service descriptor defined in Non-Patent Document 1 and Non-Patent Document 2. It is. FIG. 6B is a list showing examples of values that can be set in the application_format field and document_resolution field of the extended application service descriptor. FIG. 7 shows the extended MPT generated by the control information generation means of the broadcast signal transmitting device, the extended application service descriptor placed therein, and the extension acquired from the extended MPT by the control information analysis means of the broadcast signal receiving device. FIG. 6 is a diagram illustrating an example of a combination with an application service descriptor. FIG. 8 shows the extended MPT generated by the control information generation means of the broadcast signal transmitting device, the extended application service descriptor placed therein, and the extended MPT acquired from the extended MPT by the control information analysis means of the broadcast signal receiving device. FIG. 7 is a diagram showing another example of combinations with application service descriptors. FIG. 9 shows the extended MPT generated by the control information generation means of the broadcast signal transmitting device, the extended application service descriptor placed therein, and the extension acquired from the extended MPT by the control information analysis means of the broadcast signal receiving device. FIG. 7 is a diagram showing another example of combinations with application service descriptors.

Embodiments will be described below with reference to the drawings.
FIG. 1 is a diagram showing an example of the overall system configuration of a broadcast signal transmitting device (means) 100, a server 120, a broadcast signal receiving device 140, and a communication network 180 according to an embodiment of the present invention.
Reference numeral 100 denotes a broadcast signal transmitting device (also referred to as a broadcast station) that broadcasts a broadcast program, and includes a broadcast program server 101 and a first basic function 102 . Broadcast signal transmission device 100 may be a ground station that aggregates programs from each broadcaster and uplinks to communication satellite 150.

The broadcast program server 101 is an area in which data of programs to be broadcast by the broadcast station 100, program names, broadcast dates and times, explanations of contents, etc. are stored in advance. The broadcast program server 101 may be a server that stores data such as programs sent from each broadcaster.
The first basic function 102 is a basic function of the broadcasting station 100, and encodes (also referred to as encoding) video data, audio data, etc. of a program to be broadcast, and sends an SI (Signaling Information) signal that is control information. It has the function of multiplexing the signals and sending them out as broadcast signals. SI, which is a control signal, is a TLV (Type Length Value) packet or MMT (MPEG Media Transport) control signal. Furthermore, the multiplexing method for broadcast signals is based on the MMT/TLV method described in Non-Patent Document 1.

Reference numeral 120 is a content server for providing data content services. The broadcast signal receiving device 140 accesses the content server 120 to execute the data content service based on SI such as MH-AIT (MH-Application Information Table) included in the broadcast signal, and obtains necessary content. Download.

Reference numeral 140 denotes a user's broadcast signal receiving device (means) (which may also be called a television receiving device), and includes a second basic function 141 and a control means 142 . Further, the broadcast signal receiving device 140 can be connected to a display means 160, an HDD (Hard Disk Drive) 162, etc. via an I/F for connecting to peripheral devices.

Reference numeral 141 is a second basic function. The second basic function 141 is a basic function as a television receiving device, and receives a broadcast signal sent from the broadcast station 100, and receives an encoded video signal (also called a video stream) included in the broadcast signal. A function that separates encoded audio signals (also called audio streams), subtitle data, and SI signals, decodes video and audio signals, receives subtitle data, and analyzes SI signals. have.

Reference numeral 142 is a control means for controlling the overall operation of the broadcast signal receiving device 140. The control means 142 also controls connections and data with peripheral devices connected to the television receiver 140, such as a display means 160, a speaker 161, and an HDD (Hard Disk Drive) 162 bound to the television receiver 140. It also manages sending and receiving.

Reference numeral 160 is a display means for displaying the video included in the broadcast signal received by the second basic function 141. The display means 160 may include a built-in speaker 161 that outputs the audio included in the broadcast signal received by the second basic function 141. Note that the speaker 161 built into the display unit 160 may be an external speaker connected via an I/F such as a USB.

In the example of FIG. 1, the display means 160 is shown as being separate from the television receiving device 140, but it may be integrated with the television receiving device 140 as one function of the television receiving device 140.
FIG. 2 is a diagram schematically showing the configuration of the broadcast signal transmitting device (means) 100. In order to transmit the broadcast program stored in the broadcast station server 101 as a broadcast signal, the broadcast signal transmitting device 100 encodes video data, audio data, etc. of the program, converts it into a broadcast signal, and transmits it.

Reference numeral 210 denotes a data broadcasting encoder that encodes (also referred to as encoding) data for data broadcasting of programs stored in the broadcasting station server 101. When the data broadcast encoder 210 reads a program to be broadcast from the broadcast station server 101, it encodes the data broadcast data of the read program.

Reference numeral 211 denotes a video encoder that encodes (also referred to as encoding) video data of a program stored in the broadcast station server 101. When the video encoder 211 reads a program to be broadcast from the broadcast station server 101, it encodes the video data of the read program.

Reference numeral 212 is an audio encoder that encodes audio data of programs stored in the broadcasting station server 101. When the audio encoder 212 reads a program to be broadcast from the broadcast station server 101, it encodes the audio data of the read program.
Reference numeral 213 is a subtitle encoder that encodes subtitle data of programs stored in the broadcast station server 101. When the subtitle encoder 213 reads a program to be broadcast from the broadcast station server 101, the subtitle encoder 213 encodes the subtitle data of the read program.

Reference numeral 214 is a control information generating means that generates TLV packets and MMT control information. As described in Non-Patent Document 3, the TLV packet control signal is control information regarding multiplexing of IP packets (also referred to as TLV-SI), and contains information for channel selection and correspondence information between IP addresses and services. provide. Furthermore, the MMT control information is control information (also referred to as MMT-SI) related to the MMT package configuration and broadcasting services. The control information generation means generates a TLV packet containing control information regarding the program encoded by the video encoder 211, the audio encoder 212, and the subtitle encoder 213, and a signal of MMT control information.

Reference numeral 215 indicates encoded data broadcast data output from the data broadcast encoder 210, encoded video data output from the video encoder 211, encoded audio data output from the audio encoder 212, and encoded data from the subtitle encoder 213. This is a scrambler that scrambles the output encoded subtitle data in cooperation with the CAS module 216.

Reference numeral 216 is a CAS module that generates a key used when the scrambler 215 scrambles.
Reference numeral 217 indicates a data broadcast stream generated by the data broadcast encoder 210 encoding data broadcast data, a video stream generated by the video encoder 211 encoding video data, and an audio encoder 212 encoding audio data. This is a multiplexer that multiplexes the audio stream generated by the subtitle encoder 213, the subtitle stream generated by encoding subtitle data by the subtitle encoder 213, and the control information generated by the control information generating means 214 using the MMT/TLV method. The multiplexing unit 217 generates a TLV stream by multiplexing a video stream, an audio stream, a subtitle stream, TLV packets, and MMT control information.

Reference numeral 218 is a transmitting means for transmitting a broadcast signal as a broadcast signal. The transmitting means 218 subjects the TLV stream generated by the multiplexer 217 to modulation such as 16APSK and transmission line encoding processing such as error correction coding, and transmits it as a broadcast signal.
FIG. 3 is a diagram schematically showing the configuration of the broadcast signal receiving device (means) 140.

Broadcast signal receiving device 140 includes a second basic function 141 that is a receiving function for receiving broadcast signals, and control means 142.
Reference numeral 141 is a second basic function. The second basic functions 141 include a broadcast tuner 301, a demultiplexer 302, a descrambler 303, a CAS module 304, a data broadcast engine 305, a video decoder 306, an audio decoder 307, a subtitle decoder 308, a control information analysis means 310, and a data broadcast engine. 309 and GUI 320.

A tuner 301 receives a broadcast signal (TLV stream) sent as a broadcast signal. A broadcast signal received by tuner 301 is input to demultiplexer 302 .
The demultiplexer 302 separates the multiplexed TLV stream into a video stream, an audio stream, a data broadcast stream, a subtitle stream, and control information. The demultiplexer 304 inputs the separated video stream, audio stream, data broadcast stream, and subtitle stream to the descrambler 303, and inputs the SI signal, which is control information, to the control information analysis means 309.

The descrambler 303 descrambles the input video stream, audio stream, data broadcast stream, and subtitle stream in cooperation with the CAS module 304. The descrambler 303 inputs the descrambled video stream to the video decoder 306, the audio stream to the audio decoder 307, the data broadcast stream to the data broadcast engine 305, and the subtitle stream to the subtitle decoder 308.

The CAS module 304 generates a key used when descrambler 303 performs descrambling.
The data broadcast engine 305 performs reception processing on the input data broadcast stream and sends it to the synthesizer 326. The data broadcasting data sent to the synthesizer 326 is synthesized with video data, etc., and displayed on the display means 160.

The video decoder 306 decodes the input video stream and generates a signal to be displayed on the display means 160.
Audio decoder 306 decodes the input audio stream and generates a signal to be output to speaker 161.
The subtitle decoder 308 decodes the subtitle stream and generates a signal to be displayed on the display means 160.

The decoded video signal, subtitle signal, and data broadcasting signal are combined by a synthesizer 326 and output to the display means 160. Further, the decoded audio signal is output to the speaker 161.
The control information analysis means 310 analyzes the SI signal, which is the control information of the broadcast signal. When the control information analysis means 310 analyzes the SI signal, it sends the analysis result to the control means 142.

Reference numeral 142 is a control means for controlling the overall operation of the broadcast signal receiving device 140. The control means 142 also controls a network I/F 331 that is an I/F with a communication network and an external input I/F 332 that is a connection I/F with an external device.
As explained earlier, when providing a data content service that simultaneously provides application functions such as HTML in addition to a video/audio broadcasting service, be sure to include an application service descriptor in the MPT (MMT Package Table), which is one of the SI signals. Non-patent document 2 stipulates that one is disposed.

FIG. 4 is a diagram showing the syntax of MPT.
The asset_descriptors_length field indicated by reference numeral 401 indicates the size of the area indicated by reference numeral 402.
The for (j=0; j<M; j++) {asset_descriptors_byte} field indicated by reference numeral 402 is a data area in which descriptor data is placed. M descriptors (M is an integer) from j=0 to M-1 can be placed in the data area.

According to the provisions of Non-Patent Document 2, when a broadcast signal transmitting device performs a data content service that simultaneously provides application functions such as HTML in addition to a video/audio broadcast service, one application service descriptor is stored in the data area 402 of the MPT. Be sure to place only one signal and transmit it as a broadcast signal.

When the broadcast signal receiving device recognizes the application service descriptor located in the MPT included in the received broadcast signal, it recognizes that application functions such as HTML are simultaneously provided in the sent broadcast signal. can do.
However, if data content services become more sophisticated, it is expected that there will be various versions of data content services, and that the ability of broadcast signal receiving devices to support each version of data content services will also vary. .

Therefore, the broadcast signal receiving device according to the embodiment of the present invention has a function of generating an extended application service descriptor and a function of analyzing it, which corresponds to the high functionality of data content services. Further, the broadcast signal receiving device according to the embodiment of the present invention has a function of generating an extended MPT that allows a plurality of extended application service descriptors to be placed in the MPT, and a function of analyzing the extended MPT.

FIG. 5 is a diagram showing the syntax of an application service descriptor.
Application_format indicated by reference numeral 501 indicates an application encoding method used in the data content service.
document_resolution indicated by reference numeral 502 indicates the resolution of the data content.

FIG. 6A is a list showing settable values defined in the application_format field and document_resolution field of the application service descriptor defined in Non-Patent Document 1 and Non-Patent Document 2. It is. The only value that can be set in the application_format field is "0x1" (ARIB-HTML5). Further, the settable values defined in the document_resolution field are "0000" (1920x1080), "0001" (3840x2160), and "0010" (7680x4320).

FIG. 6B is a list showing examples of values that can be set in the application_format field and document_resolution field of the extended application service descriptor.
Examples of values that can be set in the application_format field of the extended application service descriptor shown in FIG. 6B include "0x2" (HTML-A), " This is an example in which "0x3" (HTML-B) is added. Here, HTML-A and HTML-B are newly defined application encoding methods compared to HTML-5, which is the application encoding method currently specified in Non-Patent Document 1 and Non-Patent Document 2. Assume that there is.

Further, an example of a value that can be set in the document_resolution field of the extended application service descriptor is an example in which 0011 (11520x6480) is added to the settable values defined in the document_resolution field of the application service descriptor.

In this way, the extended application service descriptor is an application service descriptor that extends the values that can be set in the application_format field or the values that can be set in the document_resolution field. The extended application service descriptor may extend settable values in fields other than the application_format field or the document_resolution field for the application service descriptor.

In addition, the extended MPT allows the number of extended application service descriptors defined in FIG. 6B to be placed in the placement area of the descriptor data indicated by reference numeral 402 in FIG. This is an expanded version.
As described above, the broadcast signal receiving device according to the embodiment of the present invention has the function of analyzing the function of generating an extended application service descriptor and extended MPT, and thereby supports higher functionality of data content services (for example, new A receiving device compatible with new (more advanced) services can now support new (more advanced) services, a receiving device compatible only with conventional services can support conventional services, etc.

Hereinafter, specific examples of the extended application service descriptor and extended MPT generated by the broadcast signal receiving device according to the embodiment of the present invention, and specific examples of the extended application service descriptor and extended MPT to be analyzed will be shown.
FIG. 7 shows the extended MPT generated by the control information generation means 214 of the broadcast signal transmitting device 100, the extended application service descriptor placed therein, and the control information analysis means 310 of the broadcast signal receiving device 140 in the extended MPT. FIG. 3 is a diagram showing an example of a combination with an extended application service descriptor obtained from

FIG. 7(A-1) shows an example in which the control information generation means 214 of the broadcast signal transmitting apparatus 100 generates an extended MPT 701 in which one extended application service descriptor (AS-1) 702 is arranged.
FIG. 7A-2 shows that the control information analysis means 310 of the broadcast signal receiving device 140 converts the extended application service descriptor (AS-1) 702 placed in the received extended MPT 701 into a desired extended application service description. An example obtained as a child is shown.

Reference numeral 701 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numeral 702 indicates an extended application service descriptor placed in the extended MPT by the control information generation means 214. Of the two numbers in parentheses, the left number 703-1 is "0x1", which is the value set in the application_format field of the extended application service descriptor by the control information generation means 214, and the right number 703-2 is the control information. It shows "0001", which is the value set in the document_resolution field of the extended application service descriptor by the generating means 214. Note that the meanings of the two numbers in parentheses are the same in the explanation of the extended application service descriptor below.

The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 701 in which an extended application service descriptor (AS-1) 702 is arranged on a broadcast signal, and transmits the control information to the broadcast signal receiving device 140.
The broadcast signal receiving device 140 analyzes the extended MPT and extended application service descriptor in the control information included in the received broadcast signal, and acquires the extended application service descriptor that satisfies the conditions as a desired extended application service descriptor. do.

In the example of FIG. 7 (A-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 701, and the values of each field of the extended application service descriptor (AS-1) 702 arranged are An example is shown in which an extended application service descriptor (AS-1) 702 is obtained as a desired extended application service descriptor as a result of analysis.

The control information analysis means 310 may determine that the extended application service descriptor is a desired extended application service descriptor by, for example, determining the value set in the application_format field of the extended application service descriptor (AS-1) 702, or the document_resolution field. The desired extended application service descriptor may be determined by determining the value set in , or by determining both the value set in the application_format field and the value set in the document_resolution field. may be determined to be an extended application service descriptor.

Specifically, for example, if the value set in the application_format field of the extended application service descriptor (AS-1) 702 is "0x1", the control information analysis means 310 determines that the extended application service descriptor (AS-1) 702 is a desired extended application service descriptor. Alternatively, if the value set in the document_resolution field is "0001", it may be determined that it is the desired extended application service descriptor, or if the value set in the application_format field is "0x1" and the document_resolution field It may be determined that the extended application service descriptor is a desired extended application service descriptor if the value set to is "0001".

FIG. 7 (B-1) shows another example in which the control information generation means 214 of the broadcast signal transmitting device 100 generates an extended MPT 711 in which one extended application service descriptor (AS-1) 712 is arranged. .
FIG. 7B-2 shows that the control information analysis means 310 of the broadcast signal receiving device 140 converts the extended application service descriptor (AS-1) 712 placed in the received extended MPT 711 into a desired extended application service description. An example is shown in which it is not acquired as a child.

Reference numeral 711 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numeral 712 indicates an extended application service descriptor placed in the extended MPT by the control information generation means 214.
The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 711 in which an extended application service descriptor (AS-1) 712 is arranged on a broadcast signal, and transmits the control information to the broadcast signal receiving device 140.

The broadcast signal receiving device 140 analyzes the extended MPT and extended application service descriptor in the control information included in the received broadcast signal, and acquires the extended application service descriptor that satisfies the conditions as a desired extended application service descriptor. do.

In the example of FIG. 7(B-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 711, and the values of each field of the extended application service descriptor (AS-1) 712 arranged An example is shown in which the extended application service descriptor (AS-1) 712 is not obtained as a desired extended application service descriptor as a result of analysis.

In this example, the control information analysis unit 310 determines that the extended application service descriptor (AS-1) is not a desired extended application service descriptor by determining the value set in the application_format field of the extended application service descriptor (AS-1).
Specifically, for example, if the value set in the application_format field of the extended application service descriptor (AS-1) is other than "0x1", the control information analysis means 310 determines that the extended application service descriptor (AS-1) is not the desired extended application service descriptor. If the value set in the document_resolution field is other than "0000", it may be determined that it is not the desired extended application service descriptor, or if the value set in the application_format field is "0x1". It may be determined that the extended application service descriptor is not a desired extended application service descriptor unless the value set in the document_resolution field is "0000".

The control information analysis means 310 that has determined that the extended application service descriptor (AS-1) 712 is not a desired extended application service descriptor determines whether the extended application service descriptor is placed in the extended MPT included in the received broadcast signal. I judge that it is not. In other words, the broadcast signal receiving device 140 can determine that the data content service is not provided in the received broadcast signal.

FIG. 8 shows an extended MPT generated by the control information generation means 214 of the broadcast signal transmitting device 100, an extended application service descriptor placed therein, and a control information analysis means 310 of the broadcast signal receiving device 140 in the extended MPT. FIG. 6 is a diagram showing another example of a combination with an extended application service descriptor acquired from .

FIG. 8(A-1) shows that the control information generation means 214 of the broadcast signal transmitting device 100 generates an extended application service descriptor (AS-1) 802-1 and an extended application service descriptor (AS-2) 802-2. An example of generating an extended MPT 801 in which two are arranged is shown.

Further, FIG. 8(A-2) shows that the control information analysis means 310 of the broadcast signal receiving device 140 converts the extended application service descriptor (AS-1) 802-1 arranged in the received extended MPT 801 into a desired extended application. An example obtained as a service descriptor is shown.

Reference numeral 801 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numerals 802-1 and 802-2 indicate two extended application service descriptors placed in the extended MPT by the control information generation means 214. The two numbers in parentheses are the same as in FIG.

The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 801 in which an extended application service descriptor (AS-1) 802-1 and an extended application service descriptor (AS-2) 802-2 are arranged on a broadcast signal. , and sent to the broadcast signal receiving device 140.

The broadcast signal receiving device 140 analyzes the extended MPT and extended application service descriptor in the control information included in the received broadcast signal, and acquires the extended application service descriptor that satisfies the conditions as a desired extended application service descriptor. do.

In the example of FIG. 8(A-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 801, and determines the two extended application service descriptors 802-1 and 802-2 that are arranged. As a result of analyzing the order in which the descriptor data shown in 402 in FIG. An example is shown below.

The control information analysis unit 310 determines the desired value by determining the value set in the application_format field of the extended application service descriptor (AS-1) 802-1 and the extended application service descriptor (AS-2) 802-2, for example. It may be determined that the extended application service descriptor is the desired extended application service descriptor, or it may be determined that it is the desired extended application service descriptor by determining the value set in the document_resolution field, or the value set in the application_format field By determining both values set in the document_resolution field, it may be determined that it is a desired extended application service descriptor.

Furthermore, the control information analysis means 310 changes the arrangement order of the extended application service descriptor (AS-1) 802-1 and extended application service descriptor (AS-2) 802-2 arranged in the extended MPT 801 to a desired order. It may be determined when acquiring the extended application service descriptor.

Specifically, for example, the control information analysis means 310 determines that the value set in the application_format field of the extended application service descriptor (AS-1) 802-1 and the extended application service descriptor (AS-2) 802-2 is " The first extended application service descriptor (AS-1) 802-1 located among the extended application service descriptors with the value 0x1" may be determined as the desired extended application service descriptor, or may be set in the document_resolution field. The first extended application service descriptor (AS-1) 802-1 among the extended application service descriptors whose value is "0001" may be determined to be the desired extended application service descriptor. Alternatively, the first extended application service descriptor (AS-1) 802 among the extended application service descriptors in which the value set in the application_format field is “0x1” and the value set in the document_resolution field is “0001” -1 may be determined to be the desired extended application service descriptor.

The order of the extended application service descriptors arranged in the extended MTP determined by the control information analysis means 310 is not limited to the first, but may be, for example, the last. For example, the control information analysis means 310 determines that the value set in the application_format field of the extended application service descriptor (AS-1) 802-1 and the extended application service descriptor (AS-2) 802-2 is "0x1" and the document_resolution The last extended application service descriptor (AS-1) 802-1 among the extended application service descriptors whose field has a value of "0001" is determined to be the desired extended application service descriptor. Good too.

FIG. 8 (B-1) shows that the control information generation means 214 of the broadcast signal transmitting device 100 generates an extended application service descriptor (AS-1) 812-1 and an extended application service descriptor (AS-2) 812-2. Another example of generating an extended MPT 811 in which two are arranged is shown.

Further, FIG. 8(B-2) shows that the control information analysis means 310 of the broadcast signal receiving device 140 converts the extended application service descriptor (AS-2) 812-2 arranged in the received extended MPT 811 into a desired extended application. An example obtained as a service is shown.

Reference numeral 811 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numerals 812-1 and 812-2 indicate two extended application service descriptors placed in the extended MPT by the control information generation means 214.
The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 811 in which an extended application service descriptor (AS-1) 812-1 and an extended application service descriptor (AS-2) 812-2 are arranged on a broadcast signal. , and sent to the broadcast signal receiving device 140.

The broadcast signal receiving device 140 analyzes the extended MPT and extended application service descriptor in the control information included in the received broadcast signal, and acquires the extended application service descriptor that satisfies the conditions as a desired extended application service descriptor. do.

In the example of FIG. 8(B-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 811, and extracts the two extended application service descriptors 812-1 and 812-2 arranged. As a result of analyzing the descriptor data shown in 402 in FIG. 4 in the order in which they are arranged in the data area, the extended application service descriptor (AS-2) 812-2 is converted to An example is shown when obtained as .

Specifically, for example, the control information analysis means 310 determines that the value set in the document_resolution field of the extended application service descriptor (AS-1) 812-1 and the extended application service descriptor (AS-2) 812-2 is " The first extended application service descriptor (AS-2) 812-2 among the extended application service descriptors having the value "0001" may be determined to be the desired extended application service descriptor.

FIG. 8(C-1) shows that the control information generation means 214 of the broadcast signal transmitting device 100 generates an extended application service descriptor (AS-1) 822-1 and an extended application service descriptor (AS-2) 822-2. Another example is shown in which an extended MPT 821 in which two are arranged is generated.

Further, FIG. 8(C-2) shows the extended application service descriptor (AS-1) 822-1 and the extended application service descriptor arranged in the received extended MPT 821 by the control information analysis means 310 of the broadcast signal receiving device 140. (AS-2) 822-2 is not acquired as a desired extended application service.

Reference numeral 821 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numerals 822-1 and 822-2 indicate extended application service descriptors placed in the extended MPT by the control information generation means 214.
The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 821 in which an extended application service descriptor (AS-1) 822-1 and an extended application service descriptor (AS-2) 822-2 are arranged on a broadcast signal. , and sent to the broadcast signal receiving device 140.

The broadcast signal receiving device 140 analyzes the extended MPT and extended application service descriptor in the control information included in the received broadcast signal, and acquires the extended application service descriptor that satisfies the conditions as a desired extended application service descriptor. do.

In the example of FIG. 8(C-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 821 and extracts two extended application service descriptors 822-1 and 822-2 arranged in the extended MPT 821. As a result of analyzing the descriptor data shown in 402 in FIG. 4 in the order in which they are arranged in the data area, none of the extended application service descriptors is obtained as the desired extended application service descriptor. An example is shown.

Specifically, for example, the control information analysis means 310 determines that the extended application service descriptor is a desired extended application service descriptor when "0x1" is set in the application_format field and "0000" is set in the document_resolution field of the extended application service descriptor. , it may be determined that extended application service descriptors with other combinations of setting values are not desired extended application service descriptors.

In this way, when a plurality of extended application service descriptors are arranged in the extended MPT, the control information analysis means 310 analyzes the order in which the data of the descriptors shown in 402 in FIG. 4 are arranged in the data area. A desired extended application service descriptor can be obtained by repeatedly performing analysis until an extended application service descriptor that meets predetermined conditions appears.

The example in Figure 8 is an example where the values of the document_resolution field of multiple extended application service descriptors placed in the extended MPT are different, but the values of the application_format field of the multiple extended application service descriptors placed in the extended MPT are different. May be different.

FIG. 9 shows the extended MPT generated by the control information generation means 214 of the broadcast signal transmitting device 100, the extended application service descriptor placed therein, and the control information analysis means 310 of the broadcast signal receiving device 140 in the extended MPT. FIG. 6 is a diagram showing another example of a combination with an extended application service descriptor acquired from .

FIG. 9(A-1) shows that the control information generation means 214 of the broadcast signal transmitting device 100 generates an extended application service descriptor (AS-1) 902-1 and an extended application service descriptor (AS-2) 902-2. An example of generating an extended MPT 901 in which two are arranged is shown.

Further, FIG. 9(A-2) shows that the control information analysis means 310 of the broadcast signal receiving device 140 converts the extended application service descriptor (AS-1) 902-1 arranged in the received extended MPT 901 into a desired extended application. An example obtained as a service is shown.

Reference numeral 901 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numerals 902-1 and 902-2 indicate two extended application service descriptors placed in the extended MPT by the control information generation means 214.
The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 901 in which an extended application service descriptor (AS-1) 902-1 and an extended application service descriptor (AS-2) 902-2 are arranged on a broadcast signal. , and sent to the broadcast signal receiving device 140.

The broadcast signal receiving device 140 analyzes the extended MPT and extended application service descriptor in the control information included in the received broadcast signal, and acquires the extended application service descriptor that satisfies the conditions as a desired extended application service descriptor. do.

In the example of FIG. 9(A-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 901, and extracts the two extended application service descriptors 902-1 and 902-2 arranged. As a result of analyzing the descriptor data shown in 402 in FIG. 4 in the order in which they are arranged in the data area, the extended application service descriptor (AS-1) 902-1 is converted to An example is shown when obtained as .

Specifically, for example, the control information analysis means 310 determines that the value set in the application_format field of the extended application service descriptor (AS-1) 902-1 and the extended application service descriptor (AS-2) 902-2 is " The first extended application service descriptor (AS-1) 902-1 among the extended application service descriptors with the value 0x1" may be determined to be the desired extended application service descriptor, or may be set in the document_resolution field. The first extended application service descriptor (AS-1) 902-1 among the extended application service descriptors whose value is "0001" may be determined to be the desired extended application service descriptor. Alternatively, the first extended application service descriptor (AS-1) 902 among the extended application service descriptors in which the value set in the application_format field is “0x1” and the value set in the document_resolution field is “0001” -1 may be determined to be the desired extended application service descriptor.

The order of the extended application service descriptors arranged in the extended MTP determined by the control information analysis means 310 is not limited to the first, but may be, for example, the last. For example, the control information analysis means 310 determines that the value set in the application_format field of the extended application service descriptor (AS-1) 902-1 and the extended application service descriptor (AS-2) 902-2 is "0x1" and the document_resolution The last extended application service descriptor (AS-1) 902-1 among the extended application service descriptors whose field has a value of “0001” is determined to be the desired extended application service descriptor. Good too.

FIG. 9 (B-1) shows that the control information generation means 214 of the broadcast signal transmitting device 100 generates an extended application service descriptor (AS-1) 912-1 and an extended application service descriptor (AS-2) 912-2. Another example of generating an extended MPT 911 in which two are arranged is shown.

FIG. 9B-2 shows that the control information analysis means 310 of the broadcast signal receiving device 140 converts the extended application service descriptor (AS-2) 912-2 arranged in the received extended MPT 911 into a desired extended application. An example obtained as a service is shown.

Reference numeral 911 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numerals 912-1 and 912-2 indicate two extended application service descriptors placed in the extended MPT by the control information generation means 214.
The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 911 in which an extended application service descriptor (AS-1) 912-1 and an extended application service descriptor (AS-2) 912-2 are arranged on a broadcast signal. , and sent to the broadcast signal receiving device 140.

The broadcast signal receiving device 140 analyzes the extended MPT and extended application service descriptor of the control information included in the received broadcast signal, and obtains an extended application service descriptor that satisfies the conditions as a desired extended application service descriptor.
In the example of FIG. 9(B-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 911, and extracts the two extended application service descriptors 912-1 and 912-2 arranged. As a result of analyzing the order in which the descriptor data shown in 402 in FIG. An example is shown below.

Specifically, for example, the control information analysis means 310 determines that the value set in the application_format field of the extended application service descriptor (AS-1) 812-1 and the extended application service descriptor (AS-2) 812-2 is " The first extended application service descriptor (AS-2) 812-2 among the extended application service descriptors that are 0x1'' may be determined to be the desired extended application service descriptor.

FIG. 9(C-1) shows that the control information generation means 214 of the broadcast signal transmitting device 100 generates an extended application service descriptor (AS-1) 922-1 and an extended application service descriptor (AS-2) 922-2. Another example of generating an extended MPT 921 in which two are arranged is shown.

Further, FIG. 9(C-2) shows that the control information analysis means 310 of the broadcast signal receiving device 140 uses the extended application service descriptor (AS-1) 822-1 and the extended application service descriptor arranged in the received extended MPT. (AS-2) 822-2 is not acquired as a desired extended application service.

Reference numeral 921 indicates an extended MPT generated by the control information generating means 214 of the broadcast signal transmitting apparatus 100.
Reference numerals 922-1 and 922-2 indicate extended application service descriptors placed in the extended MPT by the control information generation means 214.
The broadcast signal transmitting device 100 multiplexes control information including an extended MPT 921 in which an extended application service descriptor (AS-1) 922-1 and an extended application service descriptor (AS-2) 922-2 are arranged on a broadcast signal. , and sent to the broadcast signal receiving device 140.

The broadcast signal receiving device 140 analyzes the control information included in the received broadcast signal, and if the conditions are met, the extended application service descriptor (AS-1) 922-1 or the extended application service description included in the extended MPT 921 is used. Obtain any of the child (AS-2) 922-2 as the desired extended application service descriptor.

In the example of FIG. 9(C-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT, and both of the two extended application service descriptors located correspond to the desired extended application. An example is shown where it is not acquired as a service descriptor.

In the example of FIG. 9(C-2), the control information analysis means 310 of the broadcast signal receiving device 140 analyzes the extended MPT 921 and extracts two extended application service descriptors 922-1 and 922-2 arranged in the extended MPT 921. As a result of analyzing the descriptor data shown in 402 in FIG. 4 in the order in which they are arranged in the data area, none of the extended application service descriptors is obtained as the desired extended application service descriptor. An example is shown.

Specifically, for example, the control information analysis means 310 determines that the extended application service descriptor is a desired extended application service descriptor when "0x1" is set in the application_format field and "0000" is set in the document_resolution field of the extended application service descriptor. , it may be determined that extended application service descriptors with other combinations of setting values are not desired extended application service descriptors.

When arranging a plurality of extended application service descriptors in the extended MPT, the control information generating means 214 of the broadcast signal transmitting apparatus 100 can arbitrarily decide the order of arrangement.
For example, an extended application service descriptor for which "0x1" (ARIB-HTML5), which is the value described in the application_format field described in Non-Patent Document 2, is set is placed at the beginning of the descriptor data placement area 402. Good too. By arranging the extended application service descriptors in this order, it becomes possible to reliably provide data content services in a broadcast signal receiving device that supports only ARIB-HTML5 as an application encoding method.

For example, only one extended application service descriptor for which "0x1" (ARIB-HTML5) is set, which is the value described in the application_format field described in Non-Patent Document 2, is placed in the descriptor data placement area 402. You may also do so. Alternatively, only one extended application service descriptor set to “0x1” (ARIB-HTML5) may be placed at the beginning of the descriptor data placement area 402. For example, the number and order of placement of extended application service descriptors may be determined based on the value set in the application_format field, or the number and order of placement may be determined according to the value of a specific field. By doing so, it becomes possible to provide an extended MTP and an extended application n service descriptor that can be applied to data content services with various support capabilities that each broadcast signal receiving device has.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents. Furthermore, each component of the claims is within the scope of the present invention even when the component is expressed separately, or when a plurality of components are expressed together, or when these are expressed in combination. Furthermore, the device of the present invention is applied even when the claims are expressed as control logic, as a program containing instructions for a computer to execute, or as a computer-readable recording medium containing the instructions. be. Furthermore, the names and terms used are not limited, and other expressions are included in the present invention as long as they have substantially the same content and purpose.

100... Broadcast signal transmitting device, 120... Server, 140... Broadcast signal receiving device.

Claims (1)

In a receiving device that receives a broadcast signal obtained by multiplexing a video signal and an audio signal of a broadcast program, and control information that adds an application function to the broadcast program using an MMT/TLV method,
The broadcast signal includes location information from which an AIT (Application Control Information Table) of the application function can be obtained, an application encoding method used in the application function, and information on the resolution of data content used in the application function. The control information includes an application service descriptor and an extended application service descriptor that includes information that extends the application encoding method used in the data content service or information that extends the resolution of the data content, and
Receiving means for receiving the broadcast signal;
means for determining whether the extended application service descriptor is located in the control information included in the broadcast signal;
When the extended application service descriptor is placed in the control information, the extended application service descriptor whose application encoding method is 0x1 is placed first from the control information included in the broadcast signal. means for obtaining an extended application service descriptor;
A receiving device comprising: a control means for controlling the application function using the location information, the application encoding method, and the resolution of the data content of the acquired extended application service descriptor.

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