JP2019134291A - Receiver - Google Patents

Abstract

To provide a reception method or transmission method or transmission/reception method, or a reception device or transmission device or transmission/reception device that can improve services for viewers who are not good enough in visual or auditory sense or viewers who want to hear in foreign language.SOLUTION: A broadcast station sets identification information corresponding to a coded signal (such as audio signal, video signal, or caption signal) having an attribute suitable for a viewer who is not good enough in visual or auditory sense, places it in a broadcast signal or communication signal, and transmits it. A receiver receives this broadcast signal or communication signal to use the identification information. Alternatively, the broadcast station sets identification information corresponding to a sub-audio signal in foreign language and places it in the broadcast signal or communication signal, and transmits it. The receiver also receives this broadcast signal or communication signal to use the identification information.SELECTED DRAWING: Figure 1

Description

  The description of the embodiment relates to a receiving device (receiver) that receives a broadcast signal or a communication signal. Furthermore, the scope of the technical field also extends to broadcast signal or communication signal transmission devices, transmission / reception devices, methods for realizing the devices, and broadcast signal or communication signal reception methods or transmission methods.

In particular, in the event of a major disaster, basic broadcasting plays an important role as a means of communicating information for the safety and security of the people. As means for conveying such broadcast contents to people who are not visually audible, subtitle broadcasts, broadcasts with commentary audio, sign language broadcasts, etc. are operated in television broadcasts (including network communication correspondence).
The news at the time of the disaster requires immediate response such as subtitle broadcasting, broadcasting with explanation audio, and sign language broadcasting. However, at present, the immediacy and accuracy of subtitle production and commentary audio production are not ensured for all programs. As a countermeasure, the Ministry of Internal Affairs and Communications is promoting the spread of subtitle broadcasting, commentary audio broadcasting, and sign language broadcasting by setting numerical targets for the implementation time rate.
On the other hand, multilingual broadcast audio services for foreigners in Japan are also expected. In other words, the number of foreigners visiting Japan and foreigners living in Japan is expected to increase significantly toward 2020, when the Olympic and Paralympic Games are scheduled to be held in Tokyo. The number of foreign tourists visiting Japan in 2020 is expected to be 40 million (contents of the report on the “Tourism Vision Initiative Meeting for Tomorrow's Japan” chaired by Prime Minister Abe).
From the above background, it is necessary to expand subtitle broadcasting, broadcasting with commentary audio, sign language broadcasting, etc. in television broadcasting (including network communication support) and multilingual audio broadcasting.

"Program arrangement information standard used for digital broadcasting" ARIB STD-B10 5.9 edition Revised on September 29, 2016, The Japan Radio Industry Association “Access Control System Standard for Digital Broadcasting” ARIB STD-B25 6.5 Version Revised March 17, 2015, The Japan Radio Industry Association "Access control system for digital broadcasting (2nd generation) and CAS program download system standard" ARIB STD-B61 1.2 edition Revised on December 3, 2015, Japan Radio Industry Association "Technical data for digital terrestrial television broadcasting operation regulations" ARIB TR-B14 6.2 edition Revised on July 6, 2016, Japan Radio Industry Association "BS / Broadband CS Digital Broadcasting Operation Regulation Technical Data" ARIB TR-B15 7.1 Version Revised on July 6, 2016, Japan Radio Industry Association "Advanced Broadband Satellite Digital Broadcasting Operation Technical Documents" ARIB TR-B39 Version 1.0 Revised on July 6, 2016, Japan Radio Industry Association

  The technical mechanism to be implemented in television broadcasting including network communication is stipulated in standards and operational rules (technical documents) issued by the Radio Industry Association (ARIB). For example, operational rules corresponding to terrestrial digital television broadcasting are defined in the technical document TR-B14 (Non-Patent Document 4) issued by the ARIB described above. In addition, BS (Broadcasting Satellites) and 110CS (Communication Satellite) broadcasts are defined in the TR-B15 (Non-patent Document 5).

  In the operation regulations of TR-B14 and TR-B15, a method for selecting an encoded signal (elementary stream ES such as a video signal or an audio signal) to be displayed immediately after the channel selection of the user (viewer) is defined. Yes. That is, TR-B14's second edition, Section 6.4.3, clearly states that “select a“ default ”elementary stream ES when the channel selection channel is switched”.

  In the transmission control signal related to the broadcast signal or communication signal to be transmitted, as an example, the attribute of the elementary stream ES is defined by the set value of the component tag CMTG. The elementary stream ES in which the value of the component tag CMTG is set to “0x00” is defined as the “default” video signal. The component tag CMTG value “0x10” corresponds to the “default” audio signal.

  By the way, even when subtitle broadcasting, sign language broadcasting, or commentary audio corresponding to a person who is not visually or auditorially free is selected, “default” video signals and audio signals are displayed immediately after the channel selection channel is switched. Therefore, it is necessary to switch video signals and audio signals every time the channel selection channel is switched.

  Further, in the current standard, there is no means for the receiver to discriminate the elementary stream ES corresponding to subtitle broadcast, sign language broadcast or commentary sound from the transmission control signal.

  An object of the present invention is to provide a reception method or transmission method, a transmission / reception method, a reception device or transmission device, and a transmission / reception device that can improve service for viewers who are not visually or auditorily free or viewers who want to view in foreign language. And

  Identification information corresponding to an encoded signal having an attribute suitable for a viewer who is not free of vision or hearing is set. And this identification information is arrange | positioned and transmitted in a broadcast signal or a communication signal. The broadcast information or communication signal is received and the identification information is used.

  Alternatively, identification information corresponding to a sub-audio signal in a foreign language is set, and is arranged and transmitted in a broadcast signal or a communication signal. The broadcast information or communication signal is received and the identification information is used.

FIG. 1 is a diagram illustrating a configuration example of the entire system of a broadcasting station and a receiver (also referred to as a receiving device) according to an embodiment. FIG. 2 is a diagram schematically showing the main configuration of the broadcast station 200. FIG. 3 is a diagram illustrating in detail the configuration of the receiver according to the embodiment. FIG. 4A shows a conceptual diagram of the conditional access system described in Non-Patent Document 2. FIG. 4B shows an ECM for terrestrial digital television broadcasting, BS digital broadcasting, and broadband CS digital broadcasting, a scramble key (Ks) included therein, and a broadcast to be descrambled using the scramble key (Ks). It is a figure which shows the temporal relationship of a signal. FIG. 4C is a conceptual diagram of the conditional access system described in Non-Patent Document 3. FIG. 5 is a basic configuration diagram when the receiver descrambles described in Non-Patent Document 5. FIG. 6 is a process flowchart of the limited reception process performed by the receiver shown in FIG. FIG. 7 is a diagram conceptually showing a scramble key (Ks) update cycle and ECM and EMM processing. FIG. 8 is a basic configuration diagram of a receiver for descrambling a broadcast wave in the case of having two tuners, compared to the basic configuration of the receiver having one tuner shown in FIG. FIG. 9 is a basic configuration diagram of a receiver for descrambling broadcast waves in the case of having three tuners, compared to the basic configuration of the receiver having two tuners shown in FIG. FIG. 10 is a diagram showing the temporal relationship between the ECM, EMM, and scramble key (Ks). FIG. 11 illustrates the timing at which the transmission side described in Non-Patent Document 5 transmits an ECM including a scramble key (Ks) and the timing at which a video signal descrambled using the scramble key (Ks) included in the ECM is transmitted. It is a thing. FIG. 12 is an explanatory diagram according to an implementation example of limited reception of a receiver in a transmission / reception system according to the transmission rule illustrated in FIG. FIG. 13 is a diagram illustrating an embodiment in which the tuner unit is increased to three and a recording / recording unit is added to the basic configuration of the receiver illustrated in FIG. 5. FIG. 14 is an explanatory diagram according to an implementation example of limited reception of the receiver illustrated in FIG. FIG. 15 is a basic configuration diagram of the advanced BS digital broadcast and advanced broadband CS digital (hereinafter 4K8K) broadcast receiver described in Non-Patent Document 6. FIG. 16 is a basic configuration diagram of another receiver when descrambling a broadcast wave in the case of having three tuner units with respect to the receiver having the basic configuration of FIG. FIG. 17 is an explanatory diagram according to an implementation example of limited reception of the receiver illustrated in FIG. FIG. 18 is a diagram illustrating a basic configuration example of a receiver having two as 4K8K reception tuner units and three as 2K reception tuner units according to another embodiment. FIG. 19 is an explanatory diagram according to an implementation example of limited reception of the receiver illustrated in FIG. FIG. 20 is an explanatory diagram according to a limited reception implementation example of the receiver, as in FIG. FIG. 21A shows the first tuner unit (4K8K) 1801-1, the second tuner unit (4K8K) 1801-2, the third tuner unit (2K) 1801-3, and the fourth tuner unit in the receiver shown in FIG. It is a figure which shows the example of the time chart which received ECM and EMM from (2K) 1801-4 and the 5th tuner part (2K) 1801-5. FIG. 21B is a diagram illustrating a temporal transition in which the integrated CAS module in FIG. 18 performs the ECM and EMM processing on the ECM / EMM illustrated in FIG. 21A. FIG. 22 is a flowchart in which the receiver requests the CAS module to perform ECM and EMM processing in order to give the highest priority to the 2K broadcast ECM processing described in FIGS. 21A and 21B. FIG. 23 is a diagram illustrating an example of an EMM reception buffer having a storage area for storing the time when the EMM is received. FIG. 24 is a data processing flowchart of the receiver according to the embodiment that operates according to a predetermined rule. FIG. 25 is a flowchart of the processing shown in FIG. 24. “The reception time of the EMM buffer that is managed for each business entity and is waiting for processing is determined, and the EMM received within the EMM processing grace period (30 seconds) is stored in the EMM buffer. Is a processing flowchart of the EMM reception of the receiver in the case of adding a rule of “discard EMM received later when already existing”. FIG. 26 is a diagram showing a data structure in a control signal transmitted in the section format. FIG. 27 is a diagram illustrating data structures in various tables used as control signals. FIG. 28 is a diagram showing a list of setting values in the component tag. FIG. 29 is a diagram showing a definition example of the allocation range of the setting value in the component tag in the present embodiment. FIG. 30 is a diagram showing a data structure around a component tag set in the event information table. FIG. 31 is a diagram showing a problem when the identification information of this embodiment is not used. FIG. 32 is a diagram illustrating an operation procedure in the receiver when a setting value for a component tag is used as identification information. FIG. 33 is a diagram illustrating setting values for packet identification. FIG. 34 is a diagram showing another embodiment for setting values for packet identification. FIG. 35 is a diagram for explaining an embodiment when stream identification is used as identification information. FIG. 36 is a diagram showing special characters used in the system according to the present embodiment. FIG. 37 is a diagram illustrating a processing example when the channel selection channel is switched by the user in the present embodiment. FIG. 38 is a diagram for explaining an embodiment in which a set value for packet identification is used as identification information. FIG. 39 is a diagram illustrating a processing example when identification information is set in both the control signal and the encoded signal. FIG. 40 is a diagram for explaining an example of setting values in the component type. FIG. 41 is an explanatory diagram of a setting method when a combination of a component type and a component tag is used as identification information. FIG. 42 is a diagram for explaining another example of setting values in the component type. FIG. 43 is a diagram illustrating a processing example when a combination of a component type and a component tag is used as identification information. FIG. 44 is a diagram illustrating a numerical value setting example when a combination of component type and packet identification is used as identification information. FIG. 45 is an explanatory diagram of the detailed data structure in the audio component descriptor. FIG. 46 is a diagram showing detailed contents for each parameter setting area in the audio component descriptor. FIG. 47 is a diagram illustrating a numerical value setting example when a combination of a component type and component description information is used as identification information. FIG. 48 is a diagram illustrating a numerical value setting example when a combination of a component type and a language code is used as identification information. FIG. 49 is a diagram illustrating a numerical value setting example when a combination of a component tag and a language code is used as identification information. FIG. 50 is a diagram showing another data structure in the broadcast signal. FIG. 51 is a diagram showing another data structure in the communication signal. FIG. 52 is a diagram showing a data structure in another embodiment. FIG. 53 is a diagram illustrating a numerical value setting example when a packet identifier is used as identification information.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration example of the entire system of a broadcasting station and a receiver (also referred to as a receiving device) according to an embodiment.

  The broadcasting station 100 includes a broadcasting station server 101, a first security function 102, and a first basic function 103.

  The first basic function 103 is a basic function of the broadcasting station 100, which encodes and multiplexes a video signal, an audio signal, and the like of a broadcast program to generate a broadcast signal (broadcast signal is terrestrial). Broadcast signals of any broadcast wave type such as digital television broadcast, BS digital broadcast, broadband CS digital broadcast, advanced BS digital broadcast, and advanced broadband CS digital broadcast. Therefore, the transmission signal includes a route passing through the satellite. In addition, the transmission signal may include a route through a cable.

  In addition, the broadcasting station 100 can add a service that simultaneously provides application functions such as BML and HTML to a broadcast program. In this case, the broadcasting station 100 can arrange the first designation information indicating that the application function is added to the program to be broadcast in the transmission control signal and send it as a broadcast signal by the first basic function 103. .

  The broadcast station server 101 is an area in which metadata such as a program title, program ID, program outline, performers, broadcast date and time, and other data are stored in advance so as to be transmitted to the receiver by a broadcast signal.

  The first security function 102 can perform settings related to protection of content (program) included in a broadcast wave transmitted from a broadcast station.

  A service provider device (sometimes referred to as a service provider) 120 creates and manages content in a service that cooperates with the broadcast station 100 to simultaneously provide application functions added to programs broadcast by the broadcast station 100. Provide (also called distribution). The service provider device 120 includes an application management / distribution 121 and an application server 122.

  The application management / distribution 121 manages contents and applications stored in the application server 122 and distributes them to the receiver 140.

  The application server 122 is an area for storing content and applications provided to the receiver 140.

  Further, the service provider apparatus 120 responds to the request from the receiver 140 that has received the first designation information, and the application management / distribution 121 is used to transmit the application and content stored in the application server 122 to a communication network such as the Internet. To the receiver 140 via.

  The receiver 140 includes a digital broadcast receiving function (second basic function 141), a communication control unit 142, a second security function 143, an application management function 144, an API (API: Application Programming Interface) 145, an application 146, and It includes a control unit 147, receives broadcast signals broadcast from the broadcast station 100 and receives various broadcast programs and various service information, or acquires and operates an application from the service provider device 120 via a communication network. Can be.

  The second basic function 141 is a basic function of the receiver. The second basic function 141 receives a broadcast wave transmitted from the broadcast station 100, and an encoded video signal (also referred to as a video stream) included in the broadcast wave. It has a function of separating encoded audio signals (also referred to as audio streams) and control signals such as transmission control signals, decoding video signals and audio signals, and analyzing control signals such as transmission control signals.

  In addition, the second basic function 141 is connected to peripheral devices connected to the receiver 140, for example, the display 160, an HDD (Hard Disk Drive) 162 bound to the receiver 140, and the removable media 170, and data transmission / reception. Also manage.

  The application management function 144 manages an application provided in advance in the receiver 140 or an application acquired via a communication network. The application management function 144 controls the execution of the application 146 provided in advance in the receiver 140 and the application 146 acquired via the communication network via the API 145 that is an application interface (I / F).

  The communication control unit 142 has an I / F with a communication network, and can acquire applications and contents managed by the service provider device 120 via the communication network.

  The display device 160 has a built-in speaker 161 and displays the video signal decoded by the second basic function 141 in the display area and outputs an audio signal to the speaker 161. Note that the speaker 161 built in the display device 160 may be an external speaker connected via an I / F such as a USB. The display device 160 may be built in the receiver 140 or may be an external display device connected to the receiver 140 through an I / F such as HDMI (registered trademark).

  FIG. 2 is a diagram schematically showing the main configuration of the broadcasting station 200 (corresponding to 100 in FIG. 1). Broadcast station 200 generates video encoder 201, audio encoder 202, caption encoder 203, and attached data including control data such as transmission control signals, service data, and application control information for controlling application 145 operating on receiver 140. The attached data generation unit 204 is provided. In the broadcasting station 200, a broadcasting station server 211 (corresponding to 101 in FIG. 1), a first security function 212 (corresponding to 102 in FIG. 1), and a transmission / reception unit 213 are linked. The video encoder 201, audio encoder 202, subtitle encoder 203, attached data generation unit 204, multiplexing unit 205, scrambler 206, transmitter 207, and transmission / reception unit 213 are combined to correspond to the first basic function 210 (103 in FIG. 1). ).

  The codec type of the video encoder 201 is MPEG-2, H.264. H.264 (MPEG-4 AVC (AVC: Advanced Video Coding)), H.264. Any of H.265 (HEVC: High Efficiency Video Coding) may be used. The codec type is not limited to this.

  As the multiplexing method, an MPEG-2 Systems multiplexing method, an MMT (Mpeg Media Transport) multiplexing method, or a mixture of both may be used. Further, the multiplexing method is not limited to this.

  Outputs of the video encoder 201, the audio encoder 202, the caption encoder 203, and the attached data generation unit 204 are streamed, and these streams are multiplexed by the multiplexing unit 205. The multiplexed stream (broadcast signal) is scrambled by the scrambler 206, sent to the transmitter 207 as a scrambled multiplexed stream, and transmitted from the antenna by broadcast radio waves.

  The transmission control signal generated by the attached data generation unit 204 is configured in a specific format called a table and has an information description area called a descriptor.

  FIG. 3 is a diagram illustrating in detail the configuration of a receiver 300 (corresponding to 140 in FIG. 1) according to an embodiment. The receiver 300 has a second basic function 315 (corresponding to 141 in FIG. 1) which is a reception function for receiving broadcast waves.

  The second basic function 315 includes a broadcast tuner 301, a descrambler 302, a CAS module 303, a demultiplexer 304, a data broadcast reception processing unit 305, a video decoder 306, an audio decoder 307, a caption decoder 308, an analysis unit 309, and a data broadcast engine. 310 is included.

  The broadcast tuner 301 demodulates a stream (broadcast signal) sent by a broadcast wave. The demodulated stream (broadcast signal) is input to the descrambler 302. The descrambler 302 descrambles the input stream using a key from a CAS (Conditional Access System) module 303. The stream descrambled by the descrambler 302 is input to the demultiplexer 304.

  The demultiplexer 304 separates the multiplexed stream into a video stream, an audio stream, a data broadcast stream, a caption stream, and attached data, the video stream to the video decoder 306, the audio stream to the audio decoder 307, and the data broadcast stream Are input to the data broadcast reception processing unit 305, the subtitle stream is input to the subtitle decoder 308, and the attached data is input to the analysis unit 309.

  The video stream is decoded by the video decoder 306, the audio stream is decoded by the audio decoder 307, and the subtitle stream is decoded by the subtitle decoder 308.

  Control data including application control information, service data, transmission control signals, and the like included in the attached data is analyzed by the analysis unit 309.

  In addition, the data broadcast stream separated by the demultiplexer 304 is sent to the data broadcast reception processing unit 305 for reception processing. The data broadcast reception processing unit 305 extracts a display signal to be displayed on the display device 328 as a data broadcast from the data broadcast stream sent from the demultiplexer 304 and inputs the extracted display signal to the data broadcast engine 310. . The data broadcast engine 310 analyzes the transmitted display signal and outputs the analyzed content to the display control unit 327 via the synthesizer 326. The display control unit 327 displays the display content on the display 328 (corresponding to 160 in FIG. 1) based on the analysis content of the transmitted display signal.

  The decoded video signal and caption signal are combined by the combiner 326 and output to the display 328 via the display control unit 327. The display control unit 327 performs gamma characteristic setting, display screen size setting, display signal level setting, and the like.

  The audio data decoded by the audio decoder 307 is output to the speaker 329 (corresponding to 161 in FIG. 1).

  In FIG. 3A, the display device 328 and the speaker 329 are described as examples incorporated in the receiver 300, but an external display device and speaker connected via an I / F such as HDMI may be used. Good. The display control unit 327 controls the content displayed on the display 328 even when the display 328 is an external display connected to the receiver 300 through an I / F such as HDMI.

  The analysis unit 309 analyzes application control information, service data, and control data, and sends the analysis result to the control unit 330 as needed.

  The transmission control signal included in the control data includes channel identification information and program identification information of the multiplexed video signal program, and further provides an application function for the multiplexed video signal program. First designation information indicating that a service to be provided at the same time is added is included. The analysis unit 309 extracts the channel identification information, the program identification information, and the first designation information by analyzing the received control data, and transmits the extraction result to the control unit 330 as needed.

  Furthermore, the receiver 300 includes a control unit 330 as means for controlling the overall operation. The control unit 330 includes a second security function 322 (corresponding to 143 in FIG. 1), an application management function 323 (corresponding to 144 in FIG. 1), an API 324 (corresponding to 145 in FIG. 1), and an application 325 (146 in FIG. 1). Included).

  The second security function 322 reads information related to content protection from the transmission control signal included in the broadcast wave, and outputs the information to other devices (not shown) on the home network via the network I / F 341. , Content protection processing is performed when output to a connected peripheral device (not shown, corresponding to 162 and 170 in FIG. 1). The API 324 is an I / F for the application management function 323 and the application 325 to operate in cooperation.

  The application management function 323 manages an application provided in advance in the receiver 300 and an application acquired via a communication network. The application management function 323 controls execution of an application 325 provided in advance in the receiver 300 and an application 325 acquired via a communication network via an API 324 that is an application interface (I / F).

  Note that the codec type of the video decoder 306 is broadcast media received by the broadcast tuner 301, that is, terrestrial digital television broadcast, BS digital broadcast, broadband CS digital broadcast, advanced BS digital broadcast, advanced broadband CS digital broadcast, narrowband CS digital. MPEG-2 (terrestrial digital television broadcast, BS digital broadcast, broadband BS digital broadcast), H.264, or the like as a codec type corresponding to a received broadcast such as broadcast. H.264 (AVC: Advance Video Coding) (Narrowband CS Digital Broadcasting), H.264. Any of H.265 (HEVC: High Efficiency Video Coding) (Advanced BS digital broadcasting, Advanced broadband CS digital broadcasting) may be used. The codec type is not limited to this. The communication control unit 340 includes a network I / F 341 that is an I / F with the communication network 351 and a remote control I / F 342 that is an I / F with a remote controller (remote controller) 352.

  Further, the control unit 330 decrypts the ECM and EMM with respect to the CAS module 303 in order to extract the scramble key (Ks) necessary for descrambling from the encrypted ECM and EMM sent from the analysis unit 309. Give instructions to do. The CAS module 303 decrypts the ECM and EMM and extracts a scramble key (Ks) based on an instruction from the control unit 330. When the CAS module 303 extracts the scramble key (Ks), the CAS module 303 transmits the extracted scramble key (Ks) to the control unit 330. When the control unit 330 receives the scramble key (Ks) from the CAS module 303, the control unit 330 transmits the received scramble key (Ks) to the descrambler 302. When the descrambler 302 receives the scramble key (Ks) from the control unit 330, the descrambler 302 sets the received scramble key (Ks) inside. The descrambler 302 descrambles a scrambled broadcast signal using a scramble key (Ks) stored in the scrambled broadcast signal.

  The process of extracting the scramble key (Ks) necessary for descrambling will be described in detail with reference to FIGS. 4A and 4B.

  FIG. 4A shows a conceptual diagram of the conditional access system described in Non-Patent Document 2.

  This method is generally called a triple key method, and three keys, a scramble key (Ks) 401, a work key (Kw) 402, and a master key (Km) 403, are used.

  A scramble key (Ks) 401, a work key (Kw) 402, and a master key (Km) 403 are keys managed by the broadcast station 200. The encryption unit 405 that encrypts the ECM using the work key 402 and the encryption unit 406 that encrypts the EMM using the master key 403 are also encryption units managed by the broadcast station 200.

  On the other hand, the CAS module 303 inserted in the receiver 300 includes a decryption unit 425 that decrypts the ECM using the work key 422, and a decryption unit 426 that decrypts the EMM using the master key 423. It is a decryption unit managed by the CAS module 303 inserted in. A descrambler 420 that descrambles a broadcast wave using the scramble key (Ks) obtained from the CAS module 303 is the descrambler 302 managed by the receiver 300 shown in FIG.

  The broadcast station 200 generates the ECM 410 including the scramble key (Ks) and the EMM 411 including the work key (Kw) at each necessary timing. The broadcast station 200 multiplexes the generated ECM 410 and EMM 411 with other program contents and the like, scrambles by the scrambler 400 using the scramble key (Ks) 401 transmitted by the broadcast wave at that time, and by the broadcast wave Send.

  The receiver 300 uses the scramble key (Ks) 421 obtained from the CAS module 303 to descramble the received broadcast wave by the descrambler 420, and provides the program content included in the broadcast wave to the user.

  The purpose of the conditional access system is to allow only subscribers who have acquired the right to view a program broadcast by a specific broadcast station to view the program broadcast by that broadcast station. For this reason, only the subscriber's receiver 300 needs to be able to extract the scramble key (Ks) 421 transmitted by the broadcast wave.

  The ECM 410 is related information common to receivers transmitted by the broadcast station 200. The ECM 410 includes a scramble key (Ks). The ECM 410 is encrypted by the encryption unit 405 using the work key (Kw) 402.

  The EMM 411 is related information of a receiver identification unit (CAS module ID unit) transmitted by the broadcast station 200. The EMM 411 includes a work key (Kw) 402 used for encrypting the ECM 410. The EMM 411 is encrypted by the encryption unit 406 using the master key (Km) 403. In other words, the receiver 300 is installed in the installed CAS from the EMM that is related information of the receiver identification unit (CAS module ID unit) that is linked one-to-one with the master key (Km) that the broadcast station 200 broadcasts. If the EMM addressed to itself can be recognized by the CAS module ID (card ID) obtained from the module 303, the EMM encrypted using the master key (Km) concealed in the CAS module (IC card) is included in the decryption. The work key (Kw) can be extracted, and the encrypted ECM can be decrypted using the extracted work key (Kw), and the scramble key (Ks) included therein can be extracted.

  The master key (Km) 423 is stored in a secret state in the CAS module (IC card). When a subscriber acquires a right to view a program broadcast by a specific broadcasting station 200, the subscriber applies a CAS module ID (card ID), which is identification information of the CAS module (IC card) 303, to the broadcasting station. The broadcast station 200 can determine the master key (Km) 423 of the subscriber's CAS module 303 that is opposite to the applied CAS module ID (card ID) by a managing key management system (not shown). . In this way, the broadcasting station 200 can obtain the same master key 403 as the master key 423 of the subscriber's CAS module 303 from the key management system described above.

  That is, the broadcast station 200 can encrypt the EMM 411 using the master key (Km) 403 by the information CAS module ID (card ID) obtained at the time of the subscriber's application. Further, the broadcast station 200 can set the EMM 411 to be transmitted for each subscriber by setting the CAS module ID (card ID) information obtained at the time of the subscriber's application in the non-encrypted portion of the EMM 411. it can.

  The receiver 300 extracts the EMM 411 addressed to itself from the received information of the CAS module ID (card ID) in the non-encrypted part of the EMM 411, and transmits the extracted EMM 411 addressed to itself to the CAS module 303. The CAS module 303 that has received the EMM 411 uses the master key (Km) 423 stored in a concealed state to decrypt the EMM 411 by the decryption unit 426 and extracts the work key (Kw) 422. Further, the CAS module 303 uses the extracted work key (Kw) 422 to decrypt the ECM 410 by the decryption unit 425, and extracts the scramble key (Ks) 421 contained therein. The CAS card module 303 transmits the extracted scramble key (Ks) 421 to the control unit 330. The control unit 330 that has received the scramble key (Ks) 421 transmits the received scramble key (Ks) to the descrambler 420. The descrambler 420 that has received the scramble key (Ks) from the control unit 330 sets the received scramble key (Ks) inside.

  The descrambler 420 of the receiver 300 descrambles the broadcast wave received using the scramble key (Ks) 421 set therein, and provides the program content included in the broadcast wave to the user.

  As described above, the broadcasting station 200 sends an ECM having a scramble key (Ks) of the descramble target video prior to the descramble target video.

  FIG. 4B shows an ECM for terrestrial digital television broadcasting, BS digital broadcasting, and broadband CS digital broadcasting, a scramble key (Ks) included therein, and a broadcast to be descrambled using the scramble key (Ks). It is a figure which shows the temporal relationship of a signal.

  Reference numeral 440 denotes a temporal transition of a broadcast signal of a program received by the receiver 300. Reference numeral 441 denotes a temporal transition of a scramble key (Ks) used for descrambling the broadcast signal 440. Ks0, Ks1, and Ks2 are scramble keys (Ks) used for descrambling the broadcast signal. The scramble key (Ks) used for descrambling the broadcast signal is updated in units of 2000 ms.

  Reference numeral 442 represents a temporal transition of the ECM received by the receiver 300 and the scramble key (Ks) included therein. ECM1 includes scramble keys Ks0 and Ks1, ECM2 includes scramble keys Ks1 and Ks2, and ECM3 includes scramble keys Ks2 and Ks3. As described above, the ECM can store scramble keys (Ks) of both an ODD (odd number) key and an EVEN (even number) key.

  As shown in FIG. 4B, the receiver 300 can receive the scramble key (Ks) included in the ECM 1600 ms ahead of the broadcast signal to be descrambled using the scramble key (Ks). Specifically, the broadcast signal at 2000 ms from time T11 to T12 is descrambled using the scramble key Ks2. The scramble key Ks2 is arranged in the ECM2 and sent from the broadcasting station 200.

  The timing at which the receiver 300 receives this ECM2 is the timing of T20 that is 1600 ms ahead of T11. Thus, the receiver 300 can descramble the received broadcast signal without delay by receiving the scramble key (Ks) prior to the broadcast signal to be descrambled.

  In the advanced BS digital broadcast and the advanced broadband CS digital broadcast, the temporal relationship between the ECM and the scramble key (Ks) included therein and the broadcast signal to be descrambled using the scramble key (Ks) is shown in FIG. If the update period of the scramble key (Ks) in 4B is changed from 2000 ms to 8000 ms, and the timing of receiving the ECM in advance is changed from 1600 ms to 7600 ms, the principle is the same.

  FIG. 4C shows a conceptual diagram of the conditional access system described in Non-Patent Document 3. The conceptual diagram of FIG. 4C is the same as FIG. 4A. 450, 451, 452, 453, 454, 455, 456, 460, 461, 470, 471, 472, 473, 474, 475, 476 of FIG. 4C are respectively 400, 401, 402, 403, 404, FIG. 405, 406, 410, 411, 420, 421, 422, 423, 424, 425, 426.

  In broadcasting, the same signal is sent to all receivers, so if the scramble key (Ks) is used continuously for a long time, the scramble method itself is a public method stipulated in the ministerial ordinance notification. It is possible to analyze Ks by brute force of etc. When such a situation occurs, the purpose of limited reception cannot be achieved. Therefore, in the current broadcasting, a scramble key (Ks) that changes with time is used. In Non-Patent Document 2, the usage time of the same Ks is defined as a minimum of about 1 second per ECM.

  Next, a basic operation when the receiver 300 descrambles will be described.

  FIG. 5 is a basic configuration diagram when the receiver 300 descrambles described in Non-Patent Document 5.

  The receiver 500 includes a tuner unit 501 (corresponding to 301 in FIG. 3), a descrambler 502 (corresponding to 302 in FIG. 3), a TS (Transport Stream) decoding unit 503 (corresponding to 304 in FIG. 3), video / audio decoding. Unit 504 (corresponding to 306 and 307 in FIG. 3), display unit 505 (corresponding to 327 in FIG. 3), control unit 506 (corresponding to 330 in FIG. 3), and key input unit 507 (corresponding to 342 in FIG. 3). Including. The TS decoding unit 503 analyzes the transmitted descrambled broadcast signal, sequentially extracts transmission control signals, and transmits them to the control unit 506. The control unit 506 can control the tuner unit 501, the descrambler 502, and the display unit 505 based on the transmission control signal transmitted from the TS decoding unit 503. Further, the control unit 506 can receive an operation input signal from the remote controller 510 via the key input unit 507. The IC card 511 (corresponding to 303 in FIG. 3) is a CAS module that can perform ECM and EMM processing based on a command given from the control unit 506 and extract a work key (Kw) and a scramble key (Ks). is there. The receiver 500 of FIG. 5 is a case where one tuner unit is mounted.

  FIG. 6 is a process flowchart of the limited reception process performed by the receiver 500 shown in FIG.

  When a specific channel (service_id) is selected by the user's operation of the remote controller 510, the control unit 506 determines whether a PMT (Program Map Table) of the service_id is transmitted in the currently received broadcast wave by the TS decoding unit. The PAT (Program Association Table) extracted in 503 is received and determined (S601).

  If it is not transmitted as a result of the determination (No in S603), the control unit 506 refers to the NIT (Network Information Table) sent from the TS decode 503 and selects the broadcast wave in which the service_id is transmitted. Therefore, the tuner unit 501 is controlled (S610).

  The control unit 506 recognizes the EMM PID (Packet Identifier) included in the CAT (Conditional Access Table) arranged in the selected broadcast wave, and receives the EMM. The control unit 506 determines the EMM addressed to itself from the received EMM from the information of the card ID set in the non-encrypted part of the EMM. When the control unit 506 extracts the EMM addressed to itself based on the card ID information, the control unit 506 transmits the EMM to the IC card 511. The IC card 511 that has received the EMM from the control unit 506 decrypts the EMM encrypted using the master key (Km) stored therein, extracts the work key (Kw), and stores it (S611).

  Further, the control unit 506 refers to the received PAT (S605), receives the PMT of the service_id to be selected (S606), recognizes the ECM PID included in the received PMT, and receives the ECM (S607). ). When receiving the ECM, the control unit 506 issues an ECM reception command to the IC card 511.

  The IC card 511 that has received the ECM reception command decrypts the encrypted ECM using the extracted work key (Kw) and extracts the scramble key (Ks) (S612).

  When the IC card 511 normally extracts the scramble key (Ks) (Yes in S612), the IC card 511 transmits the scramble key (Ks) to the control unit 506 as a normal response to the ECM reception command.

  The control unit 506 that has received the scramble key (Ks) transmits the received scramble key (Ks) to the descrambler 502. The descrambler 502 sets the received scramble key (Ks) inside.

  The descrambler 502 descrambles the broadcast signal sent from the tuner unit 501 using the set scramble key (Ks) at the necessary timing as shown in FIG. 4B (S608).

  The video signal and audio signal included in the broadcast signal descrambled by the descrambler 502 are separated by the TS decoding unit 503 and then decoded by the video / audio decoding unit 504 (S609). The decoded video signal and audio signal are output to a monitor and a speaker (not shown).

  If the EMM is not received even though it is not contracted or contracted, a response indicating that the EMM has not been received such as non-contract is returned from the CAS module (IC card) as a response to the ECM reception command (No in S612). Upon receiving the response, the control unit 506 generates a predetermined error message such as a non-contract in the display unit 505 and displays it on the monitor.

  Next, a case where receiver 300 is equipped with two tuner units will be described.

  First, the relationship between the ECM and EMM update cycle and the processing of the CAS module (IC card) will be described.

  As described above, in Non-Patent Document 2, the update cycle of the scramble key (Ks), that is, the update cycle of the ECM is defined as a minimum of about 1 second.

  That is, in consideration of the maximum processing time, the CAS module (IC card) conforming to Non-Patent Document 2 has a performance capable of ECM and EMM processing during the update of the scramble key (Ks) for 1 second. (IC card) is expected.

  In order to process a plurality of channels (a plurality of tuners) with a single CAS module (IC card) compliant with Non-Patent Document 2, a method for extending the update cycle of the scramble key (Ks), and a CAS module (IC card) It is conceivable that a plurality of ECMs and EMMs can be processed within one second of the scramble key (Ks) update cycle.

  Actually, Non-Patent Document 5 explains as follows.

"A-3-2 Update cycle,
The update period of ECM is described in 5.8.5 ECM update / retransmission in this volume. As timing according to the processing capacity of the IC card,
・ Assuming a maximum processing time of 800 ms for 1 ECM ・ Receiver specifications are assumed on the premise that the update interval of different ECMs is 1000 ms or more. Along with the revision of this document ver1.0, the update cycle has been reviewed assuming the following.
・ BBS program recording can be processed with one IC card while watching BS broadcast on TV screen.
-The same thing can be done with a single IC card for simultaneous display of any two BS channel screens.
From the above, if the ECM update interval is 2000 ms or more, at least two scrambled services can be processed by one IC card at least for input in different TSs. "
In other words, the CAS module (IC card) compliant with Non-Patent Document 2 can process a scramble key (Ks) update cycle of 1 second. Therefore, by setting the ECM update cycle to 2 seconds, at least Two channels (two tuners) can be processed.

  In other words, by setting the ECM update cycle to 2 seconds, a non-patent document 2 compliant CAS module (IC card) allows up to two channels (two tuners) in accordance with the operation regulations regardless of its command response performance. It will be done.

  FIG. 7 is a diagram conceptually showing a scramble key (Ks) update cycle and ECM and EMM processing.

  701 represents the ECM and EMM processing times expected for a CAS module (IC card) compliant with Non-Patent Document 701. A CAS module (IC card) compliant with Non-Patent Document 2 is expected to complete one ECM and EMM processing within 1000 ms.

  702 is a state of ECM and EMM processing when a CAS module (IC card) conforming to Non-Patent Document 5 is inserted into a receiver having two tuner sections (first tuner section 1 and second tuner section). Is shown. 702-1 is a state of ECM and EMM processing for the first tuner unit, and 702-2 is a state of ECM and EMM processing for the second tuner unit.

  When there are two tuners, the CAS module (IC card) serially performs ECM processing and EMM processing included in the broadcast wave received by each tuner in accordance with a command from the receiver. The ECM and EMM processes for the first tuner and the ECM and EMM processes for the second tuner must be performed within 2 seconds, which is the scramble key (Ks) update period.

  FIG. 8 is a basic configuration diagram of a receiver 800 for descrambling broadcast waves in the case of having two tuner units, compared to the basic configuration of a receiver having one tuner unit shown in FIG. It is. 8 is different from FIG. 5 in that one tuner unit is added and the first tuner unit 801-1 and the second tuner unit 801-2 are configured, and distribution is performed in order to correspond to the two tuner units. A device 813 is added, and a built-in recording / recording unit 812 is added. The other 802 to 810 and 811 are the same as 502 to 510 and 511 in FIG.

  The receiver 800 includes two tuner units, a first tuner unit 801-1 and a second tuner unit 801-2, so that a program selected by one tuner unit is output to the monitor and at the same time another tuner unit. It is possible to record a program different from the program output to the monitor, which has been selected at, and store it in the recording / recording unit 812. The recording / recording unit 812 is, for example, a built-in HDD (hard disk drive).

  Processing when channel 1 broadcast wave to be output to monitor is selected by first tuner unit 801-1 and channel 2 broadcast wave to be recorded by recording / recording unit 812 is simultaneously selected by second tuner unit 801-2 Will be explained.

  When channel 1 (service_id_1) to be output to the monitor is selected by the user operating the remote control 810, the control unit 806 uses the TS decoding unit 803 to extract whether the PMT of service_id_1 is transmitted in the currently received broadcast wave The received PAT is received and judged.

  If it is not transmitted as a result of the determination, the control unit 806 refers to the NIT sent from the TS decoding unit 503 and controls the first tuner unit 801-1 to select the broadcast wave in which the service_id_1 is transmitted. To do.

  The control unit 806 recognizes the EMM PID included in the CAT arranged in the selected broadcast wave, and receives the EMM. The control unit 806 determines the EMM addressed to itself from the received EMM from the information of the card ID set in the non-encrypted part of the EMM. When the control unit 806 extracts the EMM addressed to itself based on the card ID information, the control unit 806 transmits the EMM to the IC card 811. The IC card 811 that has received the EMM from the control unit 806 decrypts the EMM that has been encrypted using the master key (Km) provided therein, and extracts and stores the work key (Kw).

  The control unit 806 refers to the received PAT, receives the PMT of service_id_1 to be selected, recognizes the ECM PID included in the received PMT, and receives the ECM. When receiving the ECM, the control unit 806 issues an ECM reception command to the IC card 811.

  The IC card 811 that has received the ECM reception command decrypts the encrypted ECM using the extracted work key (Kw) and extracts the scramble key (Ks).

  When the IC card 811 normally extracts the scramble key (Ks), the IC card 811 transmits the scramble key (Ks) to the control unit 806 as a normal response to the ECM reception command.

  The control unit 806 that has received the scramble key (Ks) transmits the received scramble key (Ks) to the descrambler 802. The descrambler 802 sets the received scramble key (Ks) inside.

  The descrambler 802 descrambles the broadcast signal transmitted from the first tuner unit 801-1 using the set scramble key (Ks) at the necessary timing as shown in FIG. 4B.

  The video signal and audio signal included in the broadcast signal descrambled by the descrambler 802 are separated by the TS decoding unit 803 and then decoded by the video / audio decoding unit 804. The decoded video signal and audio signal are output to a monitor and a speaker (not shown).

  In the reserved recording, the user makes a recording reservation for a desired program in an electronic program guide (EPG, not shown) or the like. The control unit 806 controls the second tuner unit 801-2 and selects a channel reserved for recording at the time near the start time of the program reserved for recording in accordance with the setting contents of the recording reservation.

  The control unit 806 recognizes the PID of the EMM included in the CAT arranged in the selected broadcast wave and receives the EMM. The control unit 806 determines the EMM addressed to itself from the received EMM from the information of the card ID set in the non-encrypted part of the EMM. When the control unit 806 extracts the EMM addressed to itself based on the card ID information, the control unit 806 transmits the EMM to the IC card 811. The IC card 811 that has received the EMM from the control unit 806 decrypts the EMM that has been encrypted using the master key (Km) provided therein, and extracts and stores the work key (Kw).

  The control unit 806 refers to the PAT, receives the PMT of service_id_2 to be selected, recognizes the ECM PID included in the received PMT, and receives the ECM. When receiving the ECM, the control unit 806 issues an ECM reception command to the IC card 811.

  The IC card 811 is selected by the ECM processing included in the broadcast wave selected by the first tuner unit 801-1 and the second tuner unit 801-2 by one IC card (one CAS module). It is necessary to perform both processes of the ECM included in the broadcast wave.

  The processing of the IC card 811 is started by a request from the receiver, but the data exchange between the control unit 806 and the IC card 811 is performed in response to a request from the control unit 806 to the IC card 811. It is a rule that the control unit 806 cannot transmit the next request to the IC card 811 until a response from the IC card 811 to the control unit 806 is returned.

  Therefore, when the ECM is continuously received from the TS decoding unit, the control unit 806 adjusts the timing for requesting the ECM processing in consideration of the ECM retransmission period and issues an ECM reception command for requesting the processing. To do.

  Similarly, in the EMM processing, the IC card 811 is included in the EMM processing included in the broadcast wave selected by the first tuner unit 801-1 and the broadcast wave selected by the second tuner unit 801-2. Therefore, the control unit 806 adjusts the timing for requesting each EMM process so that it does not overlap with the timing for requesting the ECM process. In response to this, a command is issued.

  The IC card 811 has already received the contracted EMM at the time of processing the ECM included in the broadcast wave selected by the first tuner unit 801-1, and the work key (Kw) is received from the received EMM. ) Can be extracted, the EMC requested for processing can be decrypted and the scramble key (Ks) can be extracted using the work key (Kw). When the IC card 811 can decrypt the EMC and extract the scramble key (Ks), the IC card 811 transmits the scramble key (Ks) to the control unit 806 as a normal response of the ECM reception command to the control unit 811.

  The control unit 806 that has received the scramble key (Ks) transmits the received scramble key (Ks) to the descrambler 802. The descrambler 802 sets the received scramble key (Ks) inside. The descrambler 802 descrambles the broadcast wave selected by the second tuner unit 801-2 using the set scramble key (Ks). The descrambled broadcast wave is decoded by the TS decoding unit 803, converted into a predetermined recording format (for example, a TS format encrypted with a device-binding unique key) and recorded in the recording / recording unit 812.

  When playing back the recorded program stored in the recording / recording unit 821, the recording format stored in the recording / recording unit 821 is returned to the format decoded by the TS decoding unit 803, and the video / audio decoding is performed. In part 804, the data is output to the monitor.

  Furthermore, the receiver can be equipped with three or more tuners.

  When the receiver is equipped with three or more tuners, for example, when the so-called W endorsement function capable of recording two different channels simultaneously in addition to the program being viewed, the ECM processing and EMM processing are complicated. Become.

  When it is possible to handle up to two channels with one CAS module (IC card), it is necessary to mount two CAS modules (IC cards) in order to reliably process three tuners.

  FIG. 9 is a basic configuration diagram of a receiver 900 for descrambling broadcast waves in the case of having three tuners, compared to the basic configuration of the receiver having two tuners shown in FIG. .

  9 differs from FIG. 8 in that a third tuner unit 901-3 is added, and that one IC card is added to form a first IC card 911-1 and a second IC card 911-2. It is a point. Others 902 to 910 and 912 are the same as 802 to 810 and 812 in FIG.

  The channel 1 broadcast wave to be monitored is selected by the first tuner unit 901-1, and simultaneously the channel 2 broadcast wave to be recorded by the recording / recording unit 912 is selected by the second tuner unit 901-2 and simultaneously recorded. A process in the case where the third tuner unit 901-3 selects the broadcast wave of channel 3 recorded by the recording unit 912 will be described.

  When channel 1 (service_id_1) to be output to the monitor is selected by the user operating the remote control 810, the control unit 906 extracts whether the PMT of service_id_1 is transmitted in the currently received broadcast wave by the TS decoding unit 903. The received PAT is received and judged.

  If it is determined that the transmission is not performed, the control unit 906 refers to the NIT sent from the TS decoding unit 903 and controls the first tuner unit 901-1 to select the broadcast wave in which the service_id_1 is transmitted. To do.

  The control unit 906 recognizes the PID of the EMM included in the CAT arranged in the selected broadcast wave, and receives the EMM. The control unit 906 determines the EMM addressed to itself from the received EMM from the information of the card ID set in the non-encrypted part of the EMM. When the control unit 906 extracts the EMM addressed to itself based on the card ID information, the control unit 906 transmits the EMM to either the predetermined first IC card 911-1 or the second IC card 911-2. The first IC card 911-1 or the second IC card 911-2 that has received the EMM from the control unit 906 decrypts the EMM that has been encrypted using the master key (Km) inside, and extracts the work key (Kw). And save.

  Further, the control unit 906 refers to the received PAT, receives the PMT of service_id_1 to be selected, recognizes the ECM PID included in the received PMT, and receives the ECM. When receiving the ECM, the control unit 906 issues an ECM reception command to either the predetermined first IC card 911-1 or the second IC card 911-2.

  The first IC card 911-1 or the second IC card 911-2 that has received the ECM reception command decrypts the encrypted ECM using the extracted work key (Kw) and extracts the scramble key (Ks).

  When the first IC card 911-1 or the second IC card 911-2 normally extracts the scramble key (Ks), it transmits the scramble key (Ks) to the control unit 906 as a normal response to the ECM reception command.

  The control unit 906 that has received the scramble key (Ks) transmits the received scramble key (Ks) to the descrambler 902. The descrambler 902 sets the received scramble key (Ks) inside. The descrambler 902 descrambles the broadcast signal sent from the first tuner unit 901-1 using the set scramble key (Ks) at the necessary timing as shown in FIG. 4B.

  The video signal and audio signal included in the broadcast signal descrambled by the descrambler 902 are separated by the TS decoding unit 903 and then decoded by the video / audio decoding unit 904. The decoded video signal and audio signal are output to a monitor and a speaker (not shown).

  In the scheduled recording, the user makes a reservation for recording two desired channels on the electronic program guide (EPG, not shown) or the like at the same time, and the control unit 906 follows the setting contents of the recording reservation. At the time near the start time, the second tuner unit 901-2 and the third tuner unit 901-3 are controlled to select the channel reserved for recording.

  The control unit 906 recognizes the PID of the EMM since it is included in the CAT arranged in the selected broadcast wave, and receives the EMM. The control unit 906 determines the EMM addressed to itself from the received EMM from the information of the card ID set in the non-encrypted part of the EMM. When the control unit 906 extracts the EMM addressed to itself based on the card ID information, the control unit 906 transmits the EMM to the predetermined first IC card 911-1 or second IC card 911-2. The first IC card 911-1 or the second IC card 911-2 that has received the EMM from the control unit 906 decrypts the EMM that has been encrypted using the master key (Km) inside, and extracts the work key (Kw). And save.

  Further, the control unit 906 refers to the PAT, receives the PMT of service_id_2 to be selected, recognizes the ECM PID included in the received PMT, and receives the ECM. When receiving the ECM, the control unit 906 issues an ECM reception command to the predetermined first IC card 911-1 or the second IC card 911-2.

  Since the IC cards 911-1 and 911-2 are collateralized by the operation regulations for up to two channels simultaneously with one IC card, the first tuner unit 901-1, the second tuner unit 901-2, In addition, it is necessary to set the correspondence relationship between the first tuner card 911-1 and the second IC card 91-2, which are CAS modules that perform CAS processing, with the third tuner unit 901-3 on a setting screen such as a user interface. Yes (not shown).

  For example, the first tuner unit 901-1 and the second tuner unit 901-2 are processed by the first IC card 911-1 and the third tuner unit 901-3 is processed by the second IC card 911-2. Shall. In this case, a contract is made to acquire the right to view channels A, B, and C provided as pay broadcasts with the card ID information of the first IC card 911-1, and the card ID of the second IC card 911-2. In the case where a subscription contract is made to acquire the right to view channels D, E, and F provided as pay broadcasts with the information in FIG. If the first tuner unit 901-1 selects channel C, the second tuner unit 901-2 selects channel A, and the third tuner unit 901-3 selects channel F, the contracted pay broadcast The correspondence between the channel and the first IC card 911-1 and the second IC card 911-2 can be taken.

  However, when the third tuner unit 901-3 tries to process the broadcast wave of channel A, the second IC card 911-2 is not contracted to view the broadcast wave of channel A, so the second IC card In 911-2, EMM including contract information for viewing channel A cannot be extracted, and as a result, the broadcast wave of channel A cannot be descrambled. If one IC card (CAS module) subscribes to three different channels (for example, channels A, B, and C) and receives an EMM, one of these three channels is not viewed at different times. Although it is possible to record, it is conceivable to perform simultaneous processing of simultaneous recording of channels B and C while watching channel A. However, as described above, as described in Non-Patent Document 5, one IC card can perform only simultaneous processing up to processing of two channels (tuners) TS. There are problems such as the fact that the card cannot process TS of three different channels simultaneously.

  Therefore, in the present embodiment, attention is focused on the following as main points.

  In the present embodiment, in a receiver equipped with a plurality of tuners for the convenience of the user, the number of tuners and a plurality of IC cards are set as little as possible to reduce the burden and cost of setting the association relationship between the plurality of tuners and the plurality of IC cards. Rules are created to enable processing with an IC card (CAS module).

  Therefore, for example, even with one CAS module (IC card), it is important that the number of tuners capable of simultaneous reception processing can be strictly examined.

  In the present embodiment, one entity newly sets one card ID in consideration of the ECM retransmission cycle, update cycle, command response performance described in the CAS module (IC card) specifications, etc. Specifies the frequency with which EMMs are transmitted or the number of EMMs that the receiver should process within a certain period per entity. In other words, what is newly defined is the number of EMMs to be processed within a certain period. Whether the transmission regulations are defined by the number of transmissions within a certain period or whether the receiver specifications are defined by the number of processes within a certain period. It is means of. This makes it possible to strictly examine how many tuners can perform simultaneous reception processing with one CAS module (IC card). This provides convenience for the receiver manufacturer.

Summarizing the main points in this embodiment can be described as follows:
(1). EMMs and / or EMM individual messages sent to the same receiver (CAS module ID) per entity in ECM retransmission cycles, update cycles, and broadcasts that use access control methods (limited reception methods or content protection methods) A digital broadcast transmission / reception device that regulates the frequency of transmission.

  (1b). Among the EMMs and / or EMM individual messages sent to one CAS module ID, a digital that specifies the minimum number of EMMs that need to be processed in the grace period from when the EMM is received until the command is issued to the CAS module Broadcast transmission / reception device.

  (2). In broadcasting that uses an access control method (limited reception method or content protection method), when receiving, viewing, recording, or recording more than two at the same time, ECM retransmission period, update period, and same reception per entity The transmission frequency of the EMM and / or EMM individual message sent to the machine (CAS module ID) is set, and there is a grace period until the command is issued to the CAS module after receiving the EMM and / or EMM individual message addressed to the receiver. A digital broadcast receiving apparatus that controls an EMM and / or EMM individual message processing of each of a plurality of mounted tuners during a period from an EMM and / or EMM individual message transmission frequency to a CAS module.

  (2b). In broadcasting that uses an access control method (limited reception method or content protection method), when receiving, viewing, recording, or recording more than two at the same time, ECM retransmission period, update period, and same reception per entity From the number of EMMs and / or EMM individual messages that need to be processed in the grace period from receiving the EMM and / or EMM individual message sent to the machine (CAS module ID) to issuing a command to the CAS module, A digital broadcast receiver that controls the issuing schedule.

  (3). In broadcasting that uses an access control method (limited reception method or content protection method), EMMs sent to the same receiver (CAS module ID) per entity and / or EMM individual messages are sent at a predetermined frequency. A digital broadcast transmission device that controls the operation.

  (4). Above (1). In the contents described in the above, the transmission frequency of the EMM and / or EMM individual message addressed to one CAS module ID is defined by the number of EMMs to be transmitted in the grace period from receiving the EMM until issuing a command to the CAS module. Broadcast transmission / reception device.

  (5). Above (1). The digital broadcast transmission / reception apparatus which prescribes | regulates the transmission frequency of the EMM and / or EMM individual message addressed to one CAS module ID by the number of EMM and / or the EMM individual message transmitted per update period of an ECM or a scramble key.

  (6). Above (1). The transmission frequency of the EMM and / or EMM individual message addressed to one CAS ID is transmitted in the grace period from the reception of the EMM and / or EMM individual message until the issue of the command to be performed to the CAS module. A digital broadcast transmitting / receiving apparatus defined by the number of EMMs and / or EMM individual messages to be transmitted and the number of EMMs and / or EMM individual messages to be transmitted per ECM or scramble key update period.

  (7). Above (2). The EMM to be transmitted is controlled in a grace period from the reception of the EMM addressed to the CAS module and / or the EMM individual message to the issue of the command to the CAS module. And / or a digital broadcast receiver controlled by the number of EMM individual messages.

  (8). Above (2). In the description, the ECM or scramble is controlled in the grace period from the reception of the EMM addressed to the CAS module and / or the EMM individual message to the issue of the command to the CAS module. A digital broadcast receiving apparatus controlled by the number of EMMs and / or individual EMM messages sent per key update period.

  (9). Above (2). Of the EMM to be transmitted in the grace period from the reception of the EMM addressed to the CAS module and / or the EMM individual message to the issue of the command to the CAS module. A digital broadcast receiving apparatus that controls the number of EMMs and / or the number of individual EMM messages sent per ECM or scramble key update period.

  (10). Above (3). The transmission frequency of the EMM / EMM individual message to be sent to the same receiver is the same as that described in the above description, from the reception of the EMM and / or EMM individual message to the CAS module to the issue of the command to be performed to the CAS module. A digital broadcast transmitting apparatus that controls the number of EMMs to be transmitted and / or the number of EMM individual messages in the grace period.

  (11). Above (3). The digital broadcast transmitting apparatus for controlling the transmission frequency of EMMs and / or EMM individual messages transmitted to the same receiver by the number of EMMs and / or EMM individual messages transmitted per ECM or scramble key update period.

  (12). Above (3). In this description, the sending frequency of the EMM and / or EMM individual message sent to the same receiver is delayed until the command issued to the CAS module after receiving the EMM / EMM individual message addressed to the CAS module. A digital broadcast transmission apparatus that controls the number of EMMs to be transmitted and the number of EMMs and / or EMM individual messages sent per ECM or scramble key update period during the period.

  Next, it demonstrates from the background that this embodiment exhibits a useful function.

  According to conventional standards and operational regulations, the following must be considered in order to enable simultaneous processing of two different tuners in one CAS module (IC card). Therefore, in the case of assuming a receiver with three tuners or more, in addition to the conventional standard and operation standard, a command module with a CAS module (IC card) such as an ECM or EMM of a CAS module (IC card) to be mounted It is necessary to grasp the performance required for response.

  However, exactly how many tuner processes are possible even if the ECM and EMM command response performance of this CAS module (IC card), the ECM transmission frequency, the update cycle, and the grace period until the EMM is received are determined. Detailed examination of is difficult.

  In general, since the ECM is updated every few seconds, even if a retransmission cycle is sent every 100 ms, ECM processing must be prioritized when multiple tuners are installed.

On the other hand, the EMM has an attribute that does not require immediate processing as compared to the ECM, but in some cases, it may not be as immediate as the ECM, but may require processing as quickly as possible. For example,
(A) Viewer A who wants to acquire the right to view a program broadcast by a specific broadcasting station (business entity) calls the customer center of the broadcasting station (business entity) to which he / she wants to subscribe and for troubles when joining. Then, according to the guidance of the telephone, the channel of the broadcasting station is selected by the own receiver, and the card ID number of the receiver of the viewer A is told. (B) The viewer A is in a state of making a phone call, for example. The broadcast station (business entity) immediately transmits an EMM in which the card ID number notified by telephone is set. (C) If the receiver of the viewer A receives the EMM and can extract the scramble key (Ks), The broadcast signal of the channel can be descrambled (so-called key unlock is possible)
(D) Thereby, the viewer A can confirm the completion of the contract procedure.
In the case of the above scenes (a) to (d), the EMM process is not as immediate as the ECM, but it is actually necessary to perform the process as quickly as possible.

  As described above, when the viewing contract procedure is performed while the business entity and the viewer call and the viewer confirms the reception state of the receiver, it is also assumed that the receiver misses EMM reception. Accordingly, it is also assumed that the broadcasting station (business entity) transmits EMMs having the same card ID in bursts for a certain period of time, assuming that the receiver misses EMM reception.

  The ECM may control reception of the ECM so that the receiver receives at least one within a period of using the same Ks in accordance with the update of the scramble key (Ks). The receiver does not control EMM reception, receives all EMMs sent to itself, sends all received EMMs to the CAS module (IC card), and requests processing. It is considered to be basic.

  Therefore, it is desired that the receiver processes the CAS module (IC card) with a certain period of time after receiving the EMM. For this reason, in the ARIB standard, the CAS module (IC card) response performance is indicated by the CAS module provider, and the EMM reception command is issued to the CAS module (IC card) after the receiver receives the EMM. A grace period was set before the

  According to this rule, EMM is less likely to cause problems on the premise that the frequency of sending to the same CAS module (IC card) is low. It is also assumed that a plurality of EMMs are sent in a short time.

  Recently, the number of tuners has increased, and receivers equipped with multi-channel recording functions, as well as CAS for advanced wideband BS / CS broadcasting (so-called 4K8K broadcasting) in Part 1, Part 5, Appendix 7 of Non-Patent Document 6. Regulations have been made that allow the CAS of current broadband satellite broadcasting (so-called 2K broadcasting) to be installed in an integrated CAS module.

Appendix 7 has the following description:
"Appendix 7 Shared Receiver for Current Broadcasting and Advanced BS Digital Broadcasting Reception of Advanced BS Digital Broadcasting and BS Digital Broadcasting / Broadband CS Digital Broadcasting Defined by ARIB TR-B15 or Terrestrial Digital Television Specified by ARIB TR-B14 The following rules apply when the same CAS module is applied to reception of BS digital broadcast / broadband CS digital broadcast and terrestrial digital television broadcast at the time of shared reception where at least one of the John broadcasts can be received. " .

  However, a receiver that receives the current broadband satellite broadcast (so-called 2K broadcast) has a large number of tuners, or a receiver that receives the advanced broadband satellite broadcast (so-called 4K8K broadcast) and the current broadcast (so-called 2K broadcast). There may be a case where a single CAS module (IC card) receives and processes a large number of channels in the future.

  Under such circumstances, in Non-Patent Document 6, Non-Patent Document 4 and Non-Patent Document 5, the difference in ECM (scramble key (Ks)) update cycle, advanced broadband satellite broadcasting (so-called 4K8K) and current broadcasting When the ECM and EMM response performance differs from (so-called 2K), it is essential to study strict timing control regarding the ECM and EMM processing in the receiver.

  However, it is difficult to examine timing control related to processing of ECM and EMM in order to obtain a receiver that can cope with various broadcasting systems and is equipped with a large number of tuners only by the current regulations regarding EMM.

  Therefore, in this embodiment, for example, by defining the EMM transmission frequency as described in (1) to (12) above, it is possible to set the ECM and EMM reception processing timing strictly, It is possible to prevent unexpected problems such as determining the number of tuners and missing the EMM.

  In the conditional access system with the triple key structure shown in FIG. 4A, the ECM update period is set to 2000 ms and the retransmission period is set to 100 ms as the technical specifications on the transmission side. Suppose that a new content of “send one in 30 seconds” is added.

  FIG. 10 is a diagram showing a temporal relationship between the ECM, EMM, and scramble key (Ks) in the conditional access system.

  Under the above conditions, since the ECM update is 2000 ms, the key (Ks) for scrambling the broadcast program is also updated in 2000 ms.

  Details of the temporal relationship between the scramble key (Ks) included in the ECM and the scramble key (ks) for descrambling the broadcast signal using the included scramble key (Ks) are shown in FIG. 4B. Street.

  FIG. 11 shows the descrambling using the timing at which the transmitting side transmits the ECM including the scramble key (Ks) and the scramble key (Ks) included in the ECM, as described in Non-Patent Document 4 Vol. 5, FIG. 5.8-1. The timing for transmitting a video signal to be transmitted is illustrated. The horizontal axis is a time axis.

  The transmission side is, for example, a broadcasting station. Reference numeral 1101 denotes a temporal transition in which an ECM including a scramble key (Ks) is transmitted. Reference numeral 1102 denotes temporal transition of a video signal descrambled using a scramble key (Ks) included in the ECM.

  A section of T1 + T2 is a section in which the same ECM is transmitted. The section T3 is a section in which a video signal descrambled using the scramble key (Ks) included in the ECM transmitted in the section T1 + T2 is transmitted. The ECM including the scramble key (Ks) is transmitted from the broadcast station T1 (= 1600 ms) ahead of the video signal descrambled using the scramble key (Ks) included in the ECM.

  An implementation example of the limited reception of the receiver in the transmission / reception system according to the transmission rule shown in FIG. 11 is shown below.

  FIG. 12 is an implementation example of limited reception of a receiver in a transmission / reception system according to the transmission rule shown in FIG. 1201 is a temporal transition of the received program. The received program 1201 is scrambled with Ks0 until time T11, scrambled with Ks1 between times T11 and T12, scrambled with Ks2 between times T12 and T13, and scrambled with Ks3 between times T13 and T14. It shows that.

1202 is a temporal transition of the received ECM. ECM2 is received at the timing of time T21, and indicates that the ECM includes Ks1 and Ks2 which are scramble keys (Ks). The receiver receives the program at time T21 while watching the program. The ECM 2 is received and a command is issued to the CAS module (IC card). The CAS module (IC card) completes the ECM processing between the times from section T21 to section T12. The CAS module (IC card) transmits the scramble key Ks2 obtained by the ECM process to the receiver, the receiver sets the MULTI2 descrambler, and the program scrambled using Ks2 from time T12. Descramble.

  When the channel is switched from another channel during the period T22 to T13, the receiver receives the ECM3 and issues a command to the CAS module (IC card).

  The receiver enables descrambling by obtaining Ks3 transmitted by ECM3 as a response from the CAS module (IC card).

  As shown in FIG. 7, the CAS module (IC card) conforming to Non-Patent Document 2 is expected to be capable of the total value of ECM and EMM processing within 1000 ms.

  As the performance of the CAS module (IC card) installed in the receiver, for example, if the ECM processing time is 385 ms and the EMM processing time is 500 ms, how many tuners can be processed by one CAS module (IC card)? It becomes possible through the following examination.

  Assuming the case where an EMM addressed to the receiver is received between the sections T21 and T12, since the EMM processing is not performed at the time T21, the receiver processes four ECMs at 1600 ms between the sections T21 and T12. It is possible (Case 1 in FIG. 12).

  In other words, in this state only, it seems that the CAS module (IC card) can process up to 4 tuners.

  Next, if the receiver starts the EMM processing received between times T21 and T12 from time T12, the CAS module (IC card) requires 500 ms for the EMM processing. The timing of receiving the notification of the completion of the four ECM processes from the (IC card) exceeds the time T22 when descrambling is started using the next scramble key Ks3 by 100 ms. That is, when the receiver starts the processing of the timing EMM at T12, it takes 1500 ms until T13 when the ECM processing must be completed, and can process only up to three ECMs (case 2 in FIG. 12).

  Next, when the receiver receives the EMM at T23, which is the ECM update timing, and starts processing, the remaining period from the interval T23 to T14 is 1100 ms, and up to two ECMs can be processed (FIG. 12). Case 3). In other words, based on the above assumptions, it is possible to consider that there are up to two tuners that can be processed by one CAS module (IC card).

  The above is an example of the performance of the CAS module (IC card) and the frequency of EMM transmission per entity in the EMM processing grace period. Next, an embodiment in which more than two tuners are processed by one CAS module (IC card) at the receiver will be described.

  FIG. 13 shows that the tuner unit is increased to three and the recording / recording unit is added to the basic configuration of the receiver shown in FIG. It is the added block diagram.

  The difference between FIG. 13 and FIG. 5 is that two tuner units are added and the first tuner unit 1301-1, the second tuner unit 1301-2, and the third tuner unit 1301-3 are configured. In other words, a distributor 1313 is added to correspond to the video recording unit, and a built-in recording / recording unit 1312 is added. Others are the same as 1302 to 1311 and 502 to 511 in FIG.

  The three tuner units may be any one of terrestrial digital television broadcasting, BS digital broadcasting, broadband CS digital broadcasting, or a tuner capable of three-wave tuning, and watch or record any three channels as receiver specifications.・ It shall be recordable.

  The IC card 1311 (CAS module) used here is assumed to have ECM and EMM response performance capable of processing three tuners by one. For example, the response performance of the IC card 1311 is assumed to be 300 ms for ECM response and 500 ms for EMM. Assume that the receiver 1300 transmits one EMM per business entity to the IC card 1311 after receiving the EMM within a grace period that requires EMM processing.

  FIG. 14 is an implementation example of limited reception of the receiver having the basic configuration shown in FIG.

  Reference numeral 1401 denotes a temporal transition of the received program. The received program 1401 is scrambled with Ks0 until time T11, scrambled with Ks1 between times T11 and T12, scrambled with Ks2 between times T12 and T13, and scrambled with Ks3 between times T13 and T14. It shows that. 1402 is a temporal transition of the received ECM.

  In the example of FIG. 14, during the 1600 ms from the time of ECM update timing T21 including Ks2 to T12 when the scramble key of the broadcast content is switched to Ks2, the first tuner unit 1301-1, which is the three tuners of FIG. The ECM of each channel selected by the second tuner unit 1301-2 and the third tuner unit 1301-3 and the EMM of at least one channel can be processed.

As shown in FIG. 14, the EMM received by the first tuner unit 1301-1 is processed between times T21 and T12, and the EMM received by the second tuner unit 1301-2 is processed between times T22 and T13. The EMM received by the third tuner unit 13010-3 may be processed between times T23 and T14. That is, in this example, the total processing time of the ECM and EMM of the IC card 1311 is (ECM response processing time = 300 ms) × (3 tuner) + (EMM response processing time = 500 ms) = 1400 ms ≦ 1600 ms
Thus, the IC card 1311 can process three tuners.

  In the receiver shown in FIG. 13, as a use case, a case where two different programs are recorded (so-called W endorsement) while viewing a certain broadcast will be described.

  When channel 1 (service_id_1) is selected by the user operating the remote control 1310, the control unit 1306 receives the PAT received by the TS decoding unit 1303 to determine whether the PMT of the service_id is transmitted in the currently received broadcast wave. To judge.

  If not transmitted as a result of the determination, the control unit 1306 refers to the NIT sent from the TS decoding unit 1303 and selects the first tuner unit 1301-1 to select the broadcast wave to which the service_id_1 is transmitted. Control.

  The control unit 1306 recognizes the EMM PID from the CAT arranged in the broadcast wave selected by the first tuner unit 1301-1 and receives the EMM. The control unit 1306 determines the EMM addressed to itself from the received EMM from the information of the card ID set in the non-encrypted part of the EMM. When the control unit 1306 extracts the EMM addressed to itself based on the card ID information, the control unit 1306 transmits the EMM to the IC card 1311.

  Note that the timing at which the control unit 1306 sends the EMM to the IC card 1311 is as shown in FIG. The control unit 1306 temporarily stores the received EMM until an appropriate timing for sending the EMM to the IC card 1311 is reached.

  The IC card 1311 that has received the EMM from the control unit 1306 decrypts the EMM that has been encrypted using the master key (Km) stored therein, and extracts and stores the work key (Kw).

  Also, using a program guide (not shown) by a user operation in advance, two channels scheduled to be broadcast in the same time zone, which are different from the channel selected by the first tuner unit 1301-1 and output to the monitor. Schedule recording of programs A and B.

  When making a recording reservation, the control unit 1306 displays at least a service_id of a program to be reserved, a program start time (including date and time), an end time or a broadcast continuation time from the start of the program, and a schedule management memory area (not shown). ). The control unit 1306 performs schedule management so that the recording reservations of two different channels reserved for recording are selected by the second tuner unit 1301-2 and the program B by the third tuner unit 1301-3. Even in the programs selected by the second tuner unit 1301-2 and the third tuner unit 1301-3, the procedure for acquiring the EMM is the same as that of the first tuner unit 1301-1.

  The channel selected by the remote controller 1310 is selected by the first tuner unit 1301-1. The control unit 1306 refers to the broadcast wave PAT of the program selected by the first tuner unit 1301-1, receives the PMT of service_id_1 to be selected, recognizes the ECM PID, and receives the ECM. When receiving the ECM, the control unit 1306 issues an ECM reception command to the IC card 1311.

  The IC card 1311 that has received the ECM transmits the scramble key (Ks) to the control unit 1306 as a normal response if the contracted EMM has been received and the work key (Kw) has been extracted. Receiving the scramble key (Ks), the control unit 1306 transmits the received scramble key (Ks) to the descrambler 1302. The descrambler 1302 sets the received scramble key (Ks) inside.

  The descrambler 1302 descrambles a broadcast signal corresponding to the ECM that has transmitted the scramble key (Ks) using the set crumble key (Ks), and sends the descrambler 1302 to the TS decoding unit 1303. The TS decoding unit 1303 that has received the descrambled broadcast signal extracts predetermined video and audio signals based on the video of the selected channel and the PID of the audio ES, and sends them to the video / audio decoding unit 1304. The video / audio decoding unit 1304 decodes the transmitted video and audio signals and outputs them to the monitor 14 and a speaker (not shown).

  Scheduled recording is performed by a user on a desired program in an electronic program guide (EPG, not shown) or the like. The control unit 1306 controls the second tuner unit 1301-2 to select the channel reserved for recording at the time near the start time of the program A reserved for recording in accordance with the setting contents of the recording reservation.

  The control unit 1306 determines whether the PMT of the service_id_2 of the program A is transmitted on the currently received broadcast wave by receiving the PAT extracted by the TS decoding unit 1303.

  If not transmitted as a result of the determination, the control unit 1306 refers to the NIT sent from the TS decoding unit 1303, and selects the broadcast wave in which the service_id_2 of the program A is transmitted. Therefore, the second tuner unit 1301- 2 is controlled.

  The control unit 1306 recognizes the PID of the EMM included in the CAT arranged in the broadcast wave selected by the second tuner unit 1301-2, and receives the EMM. The control unit 1306 determines the EMM addressed to itself from the received EMM from the information of the card ID set in the non-encrypted part of the EMM. When the control unit 1306 extracts the EMM addressed to itself based on the card ID information, the control unit 1306 transmits the EMM to the IC card 1311. The IC card 1311 that has received the EMM from the control unit 1306 decrypts the EMM that has been encrypted using the master key (Km) stored therein, and extracts and stores the work key (Kw).

  Note that the timing at which the control unit 1306 sends the EMM to the IC card 1311 is as shown in FIG. The control unit 1306 temporarily stores the received EMM until an appropriate timing for sending the EMM to the IC card 1311 is reached. The IC card 1311 that has received the EMM from the control unit 1306 decrypts the EMM that has been encrypted using the master key (Km) stored therein, and extracts and stores the work key (Kw).

  Further, the control unit 1306 refers to the broadcast wave PAT of the program selected by the second tuner unit, receives the PMT of service_id_2 to be selected, and recognizes the ECM PID included in the received PMT. Receive ECM. When receiving the ECM, the control unit 1306 issues an ECM reception command to the IC card 1311.

  The IC card 1311 that has received the ECM reception command sets the scramble key (Ks) in the descrambler 1302 as a normal response if the contracted EMM has been received and the work key (Kw) has been extracted.

  Since the program A is reserved for recording, the partial TS including the video ES, audio ES, subtitle ES, and the like to be recorded and recorded is reconstructed by the control unit, encrypted with the receiver-specific encryption key, HDD, etc. Are stored in the recording / recording unit 1312.

  In the case of the reserved program B as well as the program A, the third tuner 1301-3 operates and accumulates in the recording / recording unit 1312 instead of the second tuner 1301-2 in the case of the program A.

  When playing back the reserved recording program A or program B, the recorded program list is displayed on the user interface (not shown) on the screen, and after selecting the program to be played back, the control unit 1306 records the program. Reading from the recording unit 1312, descrambling with a receiver-specific key, and obtaining a compressed video / audio signal, the video / audio decoding unit 1304 decodes the compressed signal, and a monitor or speaker (not shown) Output to.

  When the receiver has a plurality of tuner units, the tuner unit may include not only a tuner unit corresponding to 2K broadcasting but also a tuner unit corresponding to 4K8K broadcasting, that is, a tuner unit corresponding to advanced broadband satellite broadcasting.

  FIG. 15 is a basic configuration diagram of the advanced BS digital broadcast and advanced broadband CS digital (hereinafter referred to as 4K8K) broadcast receiver described in the fifth volume, FIG. 5-1, Non-Patent Document 6.

  The receiver 1500 includes a tuner unit 1501, a descrambler 1502, an MMT demultiplexing unit 1503, a video / audio decoding unit 1504, a display unit 1505, a control unit 1506, and a key input unit 1507. The MMT demultiplexing unit 1503 analyzes the transmitted descrambled broadcast signal, sequentially extracts transmission control signals, and transmits them to the control unit 1506. The control unit 1506 can control the tuner unit 1501, the descrambler 1502, and the display unit 1505 based on the transmission control signal sent from the MMT demultiplexing unit 1503. The control unit 1506 can receive an operation input signal from the remote controller 1510 via the key input unit 1507. The CAS module 1511 is a CAS module that can perform ECM or EMM processing based on a command given from the control unit 1506 and extract a work key (Kw) and a scramble key (Ks). The communication module 1515 is a module for communicating with a communication network. The example of FIG. 15 is a case where there is one CAS module 1511.

  FIG. 16 is a basic configuration diagram of a receiver 1600 for descrambling broadcast waves in the case where three tuner units are provided with respect to the basic configuration of FIG.

  16 differs from FIG. 15 in that there are three tuner sections (first tuner section 1601-1, second tuner section 1601-2, third tuner section 1601-3) and three tuner sections. A distributor 1613 is added to correspond to one tuner unit, and a recording / recording unit 1612 such as an HDD is added. The other portions 1602 to 1611 are the same as 1502 to 1511 in FIG.

  The first tuner unit 1601-1, the second tuner unit 1601-2, and the third tuner unit 1601-3 are 4K8K broadcast compatible tuner units. The receiver 1600 has specifications that allow viewing or recording / recording any three channels.

  Assume that one CAS module used here has ECM and EMM response performance capable of processing three tuners.

  According to Non-Patent Document 6, the transmission cycle of the scramble key (Ks) on the transmission side is 8000 ms, and after the ECM update, the scramble key (Ks) included in the ECM is used to start scrambling the broadcast signal for 7600 ms. It is.

  Assume that the response performance of the IC card (CAS module) 1611 is, for example, an ECM response performance of 600 ms and an EMM response performance of 650 ms.

  Assume that the receiver 1600 transmits one EMM per business entity to the CAS module 1611 after receiving the EMM during a grace period that requires EMM processing.

  FIG. 17 is an implementation example of limited reception of the receiver having the basic configuration shown in FIG.

  Reference numeral 1701 denotes a temporal transition of the received program. The received program 1701 is scrambled with Ks0 until time T11, scrambled with Ks1 between times T11 and T12, scrambled with Ks2 between times T12 and T13, and scrambled with Ks3 between times T13 and T14. It shows that. Reference numeral 1702 denotes a temporal transition of the received ECM.

  In the example of FIG. 17, the first tuner unit 1601-1, which is the three tuners of FIG. 16, during 7600 ms from the time of ECM update timing T21 including Ks2 to T12 when the scramble key of the broadcast content is switched to Ks2. Each ECM selected by the second tuner unit 1601-2 and the third tuner unit 1601-3 and the EMM of at least one channel can be processed.

As shown in FIG. 17, the EMM received by the first tuner unit 1601-1 is processed between times T21 and T12, and the EMM received by the second tuner unit 1601-2 is processed between times T22 and T13. The EMM received by the third tuner unit 1601-3 may be processed between times T23 and T14. That is, in this case, the total ECM and EMM processing time of the CAS module 1611 is (ECM response processing time = 600 ms) × (3 tuner) + (EMM response processing time = 650 ms) = 2450 ms ≦ 7600 ms.
In the CAS module 1611, processing can be performed for three tuners.

  In the receiver shown in FIG. 16, a case where two different programs are recorded while viewing a certain broadcast (so-called W endorsement) will be described as a use case.

  When a specific channel (service_id) is selected by the user's remote control 1610 operation, the control unit 1606 obtains the TLV_stream_id of the service_id from the previously received and stored TLV-NIT, obtains the carrier frequency, and obtains the carrier frequency. One tuner unit 1601-1 is controlled to perform channel selection processing. The control unit 1606 performs the following processing.

  The control unit 1606 obtains IP data flow information from the AMT that has received and stored the broadcast signal converted into the TLV stream by the first tuner unit 1601-1 in advance and sets it in the MMT demultiplexing unit 1603. The PLT (Package List Table) in the PA message is acquired, and the IP data flow and packet ID for transmitting the MPT (MMT Package Table) of the specified service_id are acquired and set in the MMT demultiplexing unit 1603. The MMT packet with the packet ID is received, the PA message is acquired, and the MPT in the PA message is acquired.

  Further, the control unit 1606 recognizes the PID of the EMM from the CAT (MH) arranged in the IP data flow selected by the first tuner unit 1601-1 and receives the EMM. When the control unit 1606 extracts the EMM addressed to itself based on the information of the CAS module 1611, the control unit 1606 transmits the EMM to the CAS module 1611.

  Note that the timing at which the control unit 1606 sends the EMM to the CAS module 1611 is the timing shown in FIG. The control unit 1606 temporarily stores the received EMM until an appropriate timing for sending the EMM to the CAS module 1611 is reached. The CAS module 1611 that has received the EMM from the control unit 1606 decrypts the encrypted EMM using the master key (Km) stored therein, and extracts and stores the work key (Kw).

  Also, using a program guide (not shown) by a user operation in advance, the channel of the two channels scheduled to be broadcast in the same time zone, which is different from the channel selected by the first tuner unit 1601-1 and output to the monitor. Schedule recording of programs C and D.

  When making a recording reservation, the control unit 1606 stores at least the service_id of the program to be reserved, the program start time (including date and time), the end time or the broadcast continuation time from the program start, a memory area (not shown) for schedule management of the recorded program To store. The control unit 1606 performs schedule management so that the recording reservation for two different channels reserved for recording is selected by the second tuner unit 1601-2 for the program C and the third tuner unit 1601-3 for the program D. Even in the programs selected by the second tuner unit 1601-2 and the third tuner unit 1601-3, the procedure for acquiring the EMM is the same as that of the first tuner unit 1601-1.

  The control unit 1606 analyzes the MPT access control descriptor included in the broadcast wave selected by the first tuner unit 1601-1, thereby acquiring the packet ID of the message storing the ECM and receiving the ECM. When receiving the ECM, the control unit 1606 issues an ECM reception command to the CAS module 1611.

  Upon receiving the ECM reception command, the CAS module 1611 decrypts the encrypted ECM using the extracted work key (Kw) and extracts the scramble key (Ks).

  When the CAS module 1611 normally extracts the scramble key (Ks), the CAS module 1611 transmits the scramble key (Ks) to the control unit 1606 as a normal response to the ECM reception command.

  The control unit 1606 that has received the scramble key (Ks) transmits the received scramble key (Ks) to the descrambler 1602. The descrambler 1602 sets the received scramble key (Ks) inside. The descrambler 1602 descrambles the broadcast signal transmitted from the tuner unit 1601-1 using the set scramble key (Ks) at the necessary timing as shown in FIG.

  The descrambled assets are separated into video / audio assets by the MMT demultiplexing unit 1603, the compressed signals are decoded by the video / audio decoding 1604, and output to a monitor or a speaker (not shown).

  Scheduled recording is performed by a user on a desired program in an electronic program guide (EPG, not shown) or the like. The control unit 1606 selects the second tuner unit 1601-2 at a time slightly before the start time of the program C scheduled to be broadcast in the same time slot reserved in advance in the program guide according to the recording reservation setting. Station to obtain a TLV stream. Through the same processing as that of the first tuner 1601-1, the asset descrambled by the descrambler 1602 is separated by the MMT demultiplexing unit 1603 to separate assets such as video, audio, subtitles, etc. It is encrypted and stored in a recording / recording unit 1612 such as an HDD.

  Similarly to the reserved program C, the reserved program D is stored in the recording / recording unit 1612 after channel selection processing is performed by the third tuner unit 1601-3.

  When playing back the reserved recording program C or program D, the recorded program list is displayed on the user interface (not shown) on the screen, and after selecting the program to be played back, the control unit After reading from the recording unit, descrambling with the above-described receiver-specific key and obtaining the compressed video / audio asset, the video / audio decoding unit 1604 decodes the compressed signal, and a monitor or speaker (not shown) Output to.

  When the receiver has a plurality of tuner units, the tuner unit may include a tuner unit corresponding to 2K broadcasting and a tuner unit corresponding to 4K8K broadcasting.

  The receiver configuration shown in FIG. 18 is based on the basic configuration of the receiver described in the fifth volume of the non-patent document 5 which is a 2K broadcast operation rule, and FIG. Reference 6 Based on the basic configuration of the receiver described in the fifth edition, it has the configuration of FIG. 16 in which the number of tuners is increased, and two tuner units for 4K8K reception and two tuner units for 2K reception. It is a basic configuration example of a receiver having three.

  As shown in Appendix 7 of Non-Patent Document 6, CAS module 1811 shown in FIG. 18 is a 4K8K broadcasting CAS module that conforms to Non-Patent Document 6 Volume 5, Non-Patent Document 5 and Non-Patent Document 6 Volume 5. This is a CAS module in which the functions of a compliant 2K broadcasting IC card are integrated. An embodiment will be described in which two integrated 4K8K tuners and three 2K broadcast tuners are processed simultaneously using one integrated CAS module.

  The first tuner unit (4K8K) 1801-1 and the second tuner unit (4K8K) 1801-2 have an IF reception band from the BS right-handed circularly polarized IF frequency to the 110CS left-handed polarized wave, and have a 16APSK modulation scheme. Is a tuner / demodulator that also supports.

  The third tuner unit (2K) 1801-3, the fourth tuner unit (2K) 1801-4, and the fifth tuner unit (2K) 1801-5 are tuners for receiving 2K broadcast terrestrial digital, BS digital, and broadband CS digital broadcasts. It is a demodulator. The first descrambler 1802-1 corresponds to the 4K8K broadcast scramble method AES method, and the second descrambler 1802-2 corresponds to the 2K broadcast scramble method MULTI1 method.

  The MMT demultiplexing unit 1803-1 corresponds to the MMT / TLV multiplexing method used in 4K8K broadcasting, and the TS decoding unit 1803-2 corresponds to the MPEG-TS multiplexing method. The video / audio decoding unit 1804-1 is H.264 that is operated in 4K8K broadcasting for video encoding. H.265 | HEVC, audio coding, MPEG-4 AAC, MPEG-4 ALS, etc. are supported. The video / audio decoding unit 1804-2 corresponds to the MPEG-2 system operated in 2K broadcasting for video encoding and the MPEG-2 AAC system for audio encoding.

  The channel selection, video / audio display and recording / recording of 2K broadcast are the same as in the embodiment of FIG. 13, and the channel selection, video / audio display and recording / recording of 4K8K broadcast are the same as in the embodiment of FIG.

  Since the receiver 1800 conforms to Non-Patent Document 4, Non-Patent Document 5, and Non-Patent Document 6, the grace period until the command is issued to the CAS module 1811 after receiving the EMM addressed to itself is 30 seconds or less. To do.

In addition, when the transmission side has newly defined that “the frequency at which one entity sets one card ID within the EMM processing grace period is one in 30 seconds” or newly received According to the regulations on the aircraft side, “EMMs addressed to the CAS ID of its own receiver per entity shall be processed at least one EMM for the CAS module in 30 seconds.
If the receiver receives an EMM that exceeds the standard, it may be ignored or discarded. ”.

  Under this operational rule, the ECM and EMM response processing times of the CAS module 1811 are, for example, the ECM response processing time for 2K broadcasting is 300 ms, the ECM response processing time for 4K8K broadcasting is 600 ms, and the EMM is 2K broadcasting and 4K8K. In the case where both broadcasts are 650 ms, verification of the number of tuners that can be implemented by one CAS module and operations related to the CAS module will be described.

  FIG. 19 is an implementation example of limited reception of the basic configuration shown in FIG.

  1901 is a temporal transition of the received 4K8K program. The received program 1901 is from time T11-4, from time T11-4 to T12-4, from time T12-4 to T13-4, and from time T13-4 to T14-4. Each scramble key (Ks) is scrambled. Reference numeral 1902 denotes time transition of reception of ECM and EMM for the 1901 program. Reference numeral 1903 denotes a temporal transition of the received 2K program. The received program 1903 is until time T11-2, between time T11-2 and T12-2, between time T12-2 and T13-2, and between time T13-2 and T14-2. Each scramble key (Ks) is scrambled. Reference numeral 1904 denotes time transition of reception of ECM and EMM for the program 1903.

  First, the conditions that can be processed by the CAS module 1811 by the third tuner 1801-3, the fourth tuner 1801-4, and the fifth tuner 1801-5 of 2K broadcasting are verified.

  As shown in FIG. 19, as described in Non-Patent Document 4 and Non-Patent Document 5, the update cycle of the scramble key (Ks) in 2K broadcasting is 2 seconds, and after the update, 1600 ms before the update of Ks. The transmission of the ECM including the Ks is started. The update of the ECM is also 2 seconds which is the same as the update cycle of Ks.

  In other words, the ECM is updated and the KCM of the broadcast signal is updated, and the ECM processing for three tuners is performed in 1600 ms, and in addition, the channels selected by the three tuners within 30 seconds are different from each other. In this case, at least one EMM transmitted by the third tuner unit (2K) 1801-3, the fourth tuner unit (2K) 1801-4, and the fifth tuner unit (2K) 1801-5 can be processed. is necessary.

  Next, two tuners of 4K8K broadcasting, that is, the conditions that can be processed by the CAS module 1811 by the first tuner unit (4K8K) 1801-1 and the second tuner unit (4K8K) 1801-2 are verified.

  As shown in FIG. 19, the update of the scramble key (Ks) in the 4K8K broadcast is 8 seconds as described in Non-Patent Document 6, and the transmission of the ECM including the updated Ks is started 7600 ms before the Ks update. Is done. The ECM update cycle is also 8 seconds, which is the same as the Ks update cycle.

  That is, the processing of the first tuner unit (4K8K) 1801-1 and the second tuner unit (4K8K) 1801-2 can be performed during 7600 ms until the ECM is updated and the Ks of the broadcast signal is updated. In the same way as in the case of an entity with different channels selected by the first tuner unit (4K8K) 1801-1 and the second tuner unit (4K8K) 1801-2, the first tuner unit (4K8K) for 30 seconds. ) It is necessary that at least one EMM transmitted through the channel selected by 1801-1 and the second tuner unit (4K8K) 1801-2 can be processed.

  From the above, first, the Ks update cycle of 2K broadcasting is shorter than the Ks update cycle of 4K8K, and more immediate processing is required for ECM and EMM. Therefore, as a priority, when performing ECM processing in 2K broadcasting, 3 tuners are performed within 1600 ms after every update of ECM, then ECM processing in 4K8K broadcasting is performed, and then 2K broadcasting or 4K8K broadcasting is performed. It is reasonable to prioritize the processing of processing the EMM. It is verified whether processing using one CAS module 1811 can be performed with the priority of the above processing.

  As the most severe examples, there are five tuner sections (first tuner section (4K8K) 1801-1, second tuner section (4K8K) 1801-2, third tuner section (2K) 1801-3, fourth tuner section (2K) 1801. -4, in the program received by the tuner unit (2K) 1801-5), the case where the update timings of the respective scramble keys (Ks) coincide will be described as an example.

  First, the ECMs of the third tuner unit (2K) 1801-3, the fourth tuner unit (2K) 1801-4, and the tuner unit (2K) 1801-5, which are 2K broadcast tuner units, are processed from the ECM update timing T21. Start. Since the 2K broadcast ECM response processing time in the CAS module 1811 is 300 ms, the 2K broadcast third tuner unit (2K) 1801-3, the fourth tuner unit (2K) 1801-4, and the tuner unit (2K) 1801- The response processing time of 5 is 900 ms.

  Since the ECM response time of the 4K8K broadcast is 600 ms in this example, the 4K8K ECM can be processed in 1600-900 = 700 ms in the section up to the time T12-2 of the update timing of the scramble key (Ks) of the 2K broadcast. The ECM processing of the first tuner unit (4K8K) is performed in this section.

  The ECM response process of the first tuner unit 1801-1 is 300 ms × 3 + 600 ms = 1500 ms when there is no processing margin at the receiver. From the end of this response process to the next ECM update timing time T22 of 2K broadcasting Since it is only 500 ms, it is short to further process ECM of 4K8K broadcasting.

  Similarly, at the time of ECM update timing time T22 of 2K broadcasting, three tuners for 2K broadcasting (third tuner unit (2K) 1801-3, fourth tuner unit (2K) 1801-4, tuner unit (2K) 1801 are used. After performing the ECM process of −5), this time, the ECM process of the 4K8K broadcast tuner (second tuner unit (4K8K) 1801-2) is performed.

  Similarly, three 2K broadcast tuners (third tuner unit (2K) 1801-3, fourth tuner unit (2K) 1801-4, tuner unit (2K) 1801-5) from the next 2K broadcast ECM update cycle T23. ECM processing is performed. The ECM processing of the two 4K8K tuners (the first tuner unit (4K8K) 1801-1, the second tuner unit (4K8K) 1801-2) has already been completed, and by the Ks update timing T12-4 of 4K8K broadcasting Since there is still room, three 2K broadcast tuners (third tuner unit (2K) 1801-3, fourth tuner unit (2K) 1801-4, tuner unit (2K) 1801 from 2K broadcast ECM update timing T13-2. After performing the ECM process of −5), the EMM process of the third tuner unit (2K) 1801-3 is performed.

  Next, at the ECM update timing T24 of 2K broadcasting, three tuners for 2K broadcasting (third tuner unit (2K) 1801-3, fourth tuner unit (2K) 1801-4, tuner unit (2K) 1801-5). After the ECM processing, the EMM processing of the first tuner unit (4K8K) 1801-1 which is a 4K8K tuner is performed. At this time, Ks update of 2K broadcast is performed four times, and after 8 seconds, the process shifts to 4K8K Ks update timing T12-4.

  After the Ks update timing T12-4 of the 4K8K broadcast, the difference from the process flowchart of the Ks update timing T11-4 of the 4K8K broadcast is that the fourth tuner unit (2K) instead of the EMM process of the 1801-3 (4K) 2K) The EMM process of 1801-4 is performed in place of the EMM process of the first tuner unit (4K8K) 1801-1 and the EMM process of the second tuner unit (4K8K) 1801-2.

  Next, after the Ks update timing T13-4 of the 4K8K broadcast, the fifth tuner unit (2K) 1801-5 is used instead of the EMM processing of the fourth tuner unit (2K) 1801-4 in the difference from the timing T12-4 onward. EMM processing is performed. In this example, the number of 4K8K tuners mounted is two, and there is no need for EMM processing.

  By controlling the order of the processes as described above, the first tuner unit (4K8K) in 4K8K broadcast scramble key (Ks) update timings T11-4, T12-4, T13-4 and 8 seconds × 3 = 24 seconds 1801-1, second tuner unit (4K8K) 1801-2, third tuner unit (2K) 1801-3, fourth tuner unit (2K) 1801-4, fifth tuner unit (2K) 1801-5 EMM At least one of them can be processed, and the third tuner unit (2K) 1801-3 and the fourth tuner unit (2K) 1801-4 in every 1600 ms from the 2K ECM update timing to the next Ks update timing. The ECM processing of the fifth tuner unit (2K) 1801-5 is performed, and 76 from the ECM update timing of the 4K8K broadcast to the scramble key (Ks) update. The first tuner portion until 0ms (4K8K) and the second tuner section ECM process (4K8K) was possible.

  As described above, in the case where the CAS for 2K broadcasting and CAS for 4K8K broadcasting are integrated CAS modules, even when the Ks update cycle of 2K broadcast and 4K8K broadcast is different, in addition to the ECM update cycle and the EMM processing grace period, By defining the minimum number of EMMs that need to be processed per entity within the EMM processing grace period, it is possible to control the processing timing without losing ECM and EMM processing.

  Further, it is assumed that the ECM update cycle is 2000 ms, the retransmission cycle is 100 ms, and that “one EMM is sent to one ID per entity for 30 seconds” is performed.

  Under this operational rule, as the performance of the CAS module (IC card), for example, the number of tuners that can be mounted when the ECM response processing time is 295 ms and the EMM response processing time is 400 ms is verified.

  FIG. 20 is an implementation example of limited reception by the same receiver as in FIG.

  It is assumed that the EMM process is started at time T21. In this case, the remaining time until the time T12 excluding the EMM processing time is 1600 ms-EMM processing time 400 ms = 1200 ms. Since it is necessary to perform the ECM processing at this time, up to four tuners can be mounted. .

  Since it is assumed that only one EMM is sent to each business entity, that is, one tuner in 30 seconds, the number of times the scramble key (Ks) is updated 15 times (30 seconds / 2 seconds) in 30 seconds. It can be verified that it is possible to process the EMMs of the four entities within a 30 second grace period with a very long response time.

  In the example of FIG. 20, if no margin for the receiver processing is considered at all, it is possible to process up to 4 ECMs and 2 EMMs during a period of 2000 ms from the scramble key Ks to T12. In 30 seconds, up to 30 EMM processes are possible.

  However, under the conditions different from the above operations, for example, among the conditions in the above example (example 2), it is possible to transmit 8 times in 30 seconds to one ID per entity that is the EMM transmission frequency. If it is defined that there is a characteristic (example 3), a maximum of 32 EMMs (for 8 × 4 tuners) will be sent in 30 seconds with 4 tuners. 2 EMMs can be processed and up to 30 EMMs can be processed in 30 seconds, but up to 32 EMMs can be sent, so 2 EMMs cannot be processed .

  Therefore, even if ECM processing is possible, from the processing capability of EMM, processing up to 3 tuners, that is, processing of 24 EMMs in 30 seconds is possible.

  In actual design, the receiver is designed in consideration of a margin such as a time for taking out EMM and ECM from the multiplexed broadcast wave.

  The method for defining the frequency of EMM described above is that the number of EMMs sent per grace period to the CAS module (IC card) after receiving the EMM addressed to the ID of the CAS module (IC card) mounted on the receiver. However, the method to be defined is not limited to this, and it is only necessary to quantitatively define the EMM transmission frequency per card ID per business entity.

  For example, it may be the EMM transmission frequency per one business entity per Ks update period. For example, the maximum number of EMMs that can be transmitted from one entity to one card ID per 2000 ms is a maximum of two.

  Further, as a regulation of the EMM transmission frequency, a regulation based on a combination of a transmission frequency when the transmitting side sends EMM in bursts and a grace period in which processing is suspended for the CAS module after the receiving side receives the EMM, for example, one business There is also a defining method in which the maximum number of EMMs sent from the body to one CAS ID is 3 per 2 seconds and 6 per 30 seconds.

  The above describes the EMM for sending the contract information and work key (Kw) to the CAS module (IC card). The EMM individual message used in the automatic display message is the purpose and the CAS module (IC card). ) May have different response performance.

  Therefore, the method of defining the frequency of the EMM and the EMM individual message may be a method of defining the EMM and the EMM individual message at the same frequency, or the EMM and the EMM individual message may be defined at different frequencies. For example, the method of specifying “a maximum of two EMM / EMM individual messages to be sent to the same receiver in 30 seconds per entity” is specified at the same frequency. Note that the “maximum of two” numbers are determined in view of the actual performance of the CAS module, and are not limited to this value. An example in which the frequencies of EMM and EMM individual messages are individually defined will be shown.

“Up to two EMMs sent to the same receiver for 30 seconds per entity and up to three EMM individual messages sent to the same receiver for 30 seconds” or EMM. And the EMM individual message, it is also possible to change the width of the transmission time. “Up to two EMMs sent to the same receiver for 30 seconds per entity, and up to three EMM individual messages sent to the same receiver for 2 seconds.”
In this example, the EMM is defined for 30 seconds together with the update frequency of the EMM individual message transmission frequency scramble key (Ks).

  As described above, the frequency of EMM and / or EMM individual message is necessary to determine the number of tuners and to consider the processing margin of the control unit of the receiver in a receiver equipped with more than two tuners. On the other hand, regarding the frequency, on the other hand, the method of subscription application of broadcasters, for example, the method of accepting by telephone as described above, sending immediately without hanging up the telephone, or calling or online without sending immediately It is possible to stipulate according to the actual situation of operation, for example, when sending EMM within a certain period of time (for example, within 30 minutes).

  The above is an example in which the transmission frequency of EMM (including EMM individual messages) is specified in the operation rules. However, assuming that the EMM is missed at the receiver, the same EMM is also retransmitted in a short time as an actual operation. Is assumed. Therefore, in the operation regulations, there is a method of defining the minimum number of EMMs to be received and processed within the grace period for the CAS module after receiving the EMM. For example, “The number of receivers that have received EMM / EMM individual messages addressed to the same receiver should request processing from the CAS module is at least one in 30 seconds per entity. The number of EMMs that exceed this may be discarded. ”The minimum number that the receiver should process in the EMM processing grace period is specified, and the EMM addressed to the receiver (CAS ID) received within the processing grace period is It is a method that can be discarded for those exceeding the regulation.

  As described above, the receiver processes the CAS module (IC card) after receiving the EMM or EMM individual message addressed to itself (addressed to the card ID of the CAS module inserted in the receiver). It is easy to understand how many EMMs need to be processed in the grace period before requesting, but it is not limited to this. What is necessary is just to prescribe | regulate the transmission frequency of EMM or an EMM individual message, or the number of EMMs which a receiver needs to process.

  In addition, in view of the demand for receivers equipped with multi-channel tuners in accordance with regulations already in operation and the demand for receivers with 2K, 4K, and 8K integrated, past assumptions have been made to enable strict receiver design. In order to define the transmission frequency of EMM and EMM individual message without contradiction, it is possible to go through the reverse examination process.

  For example, in the implementation example of the limited reception of the receiver shown in FIG. 20, if the implicit understanding that four tuners can be installed is assumed, the receiver is addressed to itself (the CAS inserted in the receiver). After receiving EMM (to the card ID of the module), up to 24 EMM processes can be processed for the CAS module (IC card) during the grace period of 30 seconds. From 24/4 = 6, By prescribing that “a maximum of 6 EMMs are sent per 30 seconds (grace period for EMM processing) for one CAS ID per entity”, without overcoming the previous implicit matters. Normalization is possible. Of course, the number of 6 or less may be any number as long as it is an integer of 6 or less.

  This number of 6 is a case where the performance of the CAS module is estimated, and it goes without saying that the result may vary depending on the actual performance of the CAS module. As the transmission / reception system, the EMM transmission frequency or the minimum number of EMMs to be processed within the EMM processing grace period is determined in consideration of the actual performance of the CAS module, the ECM update period, and the EMM processing grace period.

  In addition, this embodiment is mainly defined in Non-Patent Document 6, which is a broadband satellite broadcast defined in Non-Patent Document 5, a terrestrial digital television broadcast defined in Non-Patent Document 4, an advanced broadband satellite broadcast, so-called 4K8K broadcast. In addition to the ECM update period and retransmission period, the number of EMMs that are sent within the time that can be suspended after receiving the EMM addressed to the CAS ID installed in the receiver addressed to one CAS ID per entity, Alternatively, by defining the minimum number of EMMs to be processed within the EMM processing grace period, exactly the same effect can be obtained. Needless to say, the package shape of the CAS module is not limited to the IC card, and the shape of the IC chip is not changed.

  FIG. 21A shows the first tuner (4K8K) 1801-1, the second tuner (4K8K) 1801-2, the third tuner (2K) 1801-3, and the fourth tuner (2K) 1801 in the receiver shown in FIG. 4 shows an example of a time chart when ECM and EMM are received from the fifth tuner (2K) 1801-5. In the receiver 1800, the receiver receives ECM and EMM respectively at the times indicated by the arrows. After receiving the EMM 2121 from the second tuner (4K8K) 1801-2, the first tuner (4K8K) 1801-1 to ECM2110, the second tuner (4K8K) 1801-2 to ECM2120, and the first tuner (4K8K) 1801-1. To EMM2111, third tuner (2K) 1801-3 to ECM2130, fourth tuner (2K) 1801-4 to ECM2140, third tuner (2K) 1801-3 to EMM2131, fifth tuner (2K) 1801 It shows that ECM2150 is received in order from -5. The horizontal axis is a time axis.

  FIG. 21B shows a time transition in which the integrated CAS module of FIG. 18 performs the ECM / EMM processing of the ECM / EMM shown in FIG. 21A. The horizontal axis is a time axis.

  The ECM / EMM response processing time of the integrated CAS module 1811 in FIG. 18 is, for example, the ECM response processing time in 2K broadcasting is 300 ms, the ECM response processing time in 4K8K broadcasting is 600 ms, and EMM is in 2K broadcasting and 4K8K broadcasting. The time transition of the ECM and EMM processing is shown for both cases of 650 ms.

  For example, 2160 represents the time during which the CAS module is processing the EMM 2121. 2161 represents the time during which the CAS module is processing the ECM 2110. 2162 represents the time during which the CAS module is processing the ECM 2120. Reference numeral 2163 denotes the time during which the CAS module is processing the EMM 2111. FIG. 2102-1 shows that the CAS module processes in the order of EMM 2121, ECM 2110, ECM 2120, and EMM 2111.

  2102-1, 2102-2, and 2102-3, when the control unit 1806 receives the EMM 2121, it is confirmed that there is no other high-priority buffer, and the control unit 1806 is connected to the integrated CAS module 1811. It is the figure which considered the process of the CAS module at the time of receiving in order of 2110, 2120, 2111, 2130, 2140, 2131, 2150 immediately after starting a process. Further, since the processing of the integrated CAS module 1881 cannot be performed in parallel, other processing cannot be performed during the processing time of 2160 that is processing of 2121, for example. In this discussion, in order to consider the worst condition, 2102-1, 2102-2, and 2102-3 are examples in which the processing of 2160 which is the processing of 2121 is first performed.

  2102-1 represents the processing order when processing is performed for timing reception when the receiver receives ECM and EMM. In this example, the ECM 2130 that should originally finish processing within 1600 ms, which is the time from the reception timing of the ECM to the timing of receiving the broadcast signal descrambled using the scramble key (Ks) included in the ECM. , ECM 2140 and ECM 2150 are not completed.

Therefore, “4.1 (8)” described in Non-Patent Document 5.
-Regarding the EMM reception command and EMM individual message reception command, issue a command to the IC card from the receiver within 30 seconds after receiving the EMM and EMM individual message addressed to its own card. (There is a related description in this volume A-10.) "
An example in which ECM processing is prioritized according to the above and EMM processing and EMM individual message processing are delayed is 2102-2. As shown in this example, the priority of the ECM processing is increased to complete the 2K ECM processing within 2000 ms, which is the update period of the 2K ECM. However, the total processing time from EMM2121 to ECM2150 is the processing time of EMM2121 (650 ms) + the processing time of ECM2110 (600 ms) +
ECM2120 processing time (600 ms) + ECM2130 processing time (300 ms) +
ECM 2140 processing time (300 ms) + ECM 2150 processing time (300 ms) = 2750 ms
In the 2K ECM, the process of the ECM 2150 received by the receiver last in order is not completed within 2000 ms.

  Therefore, in order to create a shared receiver described in TR-B39 Vol. 5 Appendix 7 “Common Receiver for Current Broadcasting and Advanced BS Digital Broadcasting”, it is necessary to devise further processing order of ECM and EMM. It becomes.

  FIG. 2102-3 shows the order of processing when priority is given to ECM processing of 2K broadcasting.

By giving the highest priority to the ECM processing of 2K broadcasting, the processing time of ECM of 2K broadcasting is as follows.
EMM2121 (650 ms) + ECM2130 (300 ms) + ECM2140 (300 ms) + ECM2150 (300 ms) = 1550 ms
In the 2K ECM, the process of the ECM 2150 received by the receiver last in order is completed within 2000 ms.

  FIG. 22 is a flowchart for requesting the CAS module to perform ECM and EMM processing in order to give the highest priority to the ECM processing of 2K broadcasting described in FIG.

  First, a buffer for performing ECM and EMM processing will be described. When receiving the ECM or EMM from the MMT demultiplexing unit 1803-1 or the TS decoding unit 1803-2, the control unit 1806 illustrated in FIG. 18 performs processing request transmission processing to request the CAS module 1811 to perform ECM and EMM processing. Is started (S2200).

  The control unit 1806 temporarily sends the ECM and EMM sent from the MMT demultiplexing unit 1803-1 or TS decoding unit 1803-2 to the CAS module 1811 in order to control the order of ECM and EMM processing requests. It manages the ECM reception buffer and the EMM reception buffer to be saved. Each buffer is prepared by the number of tuners, the ECM reception buffer has a single stage buffer, and the EMM reception buffer has a plurality of stages.

  The ECM reception buffer is a buffer for temporarily storing the ECM included in the 2K broadcast, the 4K broadcast, and the 8K broadcast. In order to distinguish between 2K and 4K8K, the buffer prepared for the 2K tuner distinguishes the 2K ECM reception buffer, and the buffer prepared for the 4K8K tuner distinguishes the 4K8K ECM buffer. The EMM reception buffer is a buffer for temporarily storing EMMs included in 2K broadcast, 4K broadcast, and 8K broadcast. The data in each buffer is deleted when a response to the processing request from the control unit 1806 to the CAS module 1811 is returned.

  A flowchart for giving the highest priority to the ECM processing of 2K broadcasting described in FIG. 22 will be described. The control unit 1806 checks the first 2K broadcast ECM reception buffer (S2201).

  As a result of the confirmation, when there is data waiting for request transmission in the CAS card module 1811 in the ECM reception buffer for 2K broadcasting (Yes in S2202), the control unit 1806 issues a processing request command to the CAS module 1811, and Wait for a response (S2208).

  As a result of the confirmation, if there is no data waiting for request transmission in the CAS card module 1811 in the 2K broadcast ECM reception buffer (No in S2202), the control unit 1806 next confirms the contents in the 4K8K broadcast ECM reception buffer. (S2203).

  As a result of the confirmation, if there is data waiting for request transmission in the CAS card module 1811 in the ECM reception buffer for 4K8K broadcasting (Yes in S2204), the control unit 1806 issues a processing request command to the CAS module, and the response (S2208).

  As a result of the confirmation, when there is no data waiting for request transmission in the CAS card module 1811 in the ECM reception buffer for 4K8K broadcasting (No in S2204), the control unit 1806 next confirms the contents in the EMM reception buffer (S2205). .

  As a result of the confirmation, when there is data waiting for request transmission in the CAS card module 1811 in the EMM reception buffer (Yes in S2206), the control unit 1806 issues a processing request command to the CAS module and waits for a response ( S2208). The control unit 1806 extracts data having the oldest reception time in the EMM buffer and issues a processing request command to the CAS module 1811.

  As a result of the confirmation, when there is no data waiting for request transmission in the CAS card module 1811 in the EMM reception buffer (No in S2206), the control unit 1806 ends the processing request transmission process (S2207).

  Upon receiving the response from the CAS module 1811 in S2208, the control unit 1806 returns to the processing of S2201 again and confirms whether there is data waiting for a processing request in the 2K broadcast ECM reception buffer, the 4K8K broadcast ECM reception buffer, or the EMM buffer. continue.

  FIG. 22 shows the processing priority only for the ECM / EMM processing of the present invention. Other commands between the control unit 1805 and the CAS module 1811 are omitted.

  Next, at least one EMM must be processed for the CAS module in 30 seconds after receiving an EMM with a card ID addressed to itself per business entity. An example in the case of performing processing in accordance with the definition of “can be ignored or discarded when received” will be shown.

In Non-Patent Document 5, regarding the EMM processing grace period of the receiver,
-Regarding the EMM reception command and EMM individual message reception command, issue a command to the IC card from the receiver within 30 seconds after receiving the EMM and EMM individual message addressed to its own card. (There is a related description in this volume A-10.)
There is a description.

In addition, Non-Patent Document 6 similarly relates to the EMM processing grace period of the receiver.
-Regarding the EMM reception command and EMM individual message reception command, issue a command from the receiver to the CAS module within 30 seconds after receiving the EMM and EMM individual message addressed to its own card. (There is a related description in Appendix 4.)
Is described.

According to this embodiment, for example, “the number of EMM / EMM individual messages addressed to the same receiver to be processed for the CAS module is at least one in 30 seconds per entity. The EMM may be discarded. "
Is added.

  An EMM reception buffer and its processing flowchart when this rule is added will be described.

  In order to realize the processing that the EMM exceeding 30 seconds may be discarded, the control unit 1806 shown in FIG. 18 needs to know the reception time when the EMM is received. For this reason, the control unit 1806 needs to have a storage area for storing the time when the EMM is received in the EMM reception buffer provided therein.

  FIG. 23 is an example of an EMM reception buffer having a storage area for storing the time when the EMM is received. (A) is an example of a reception buffer that does not have a storage area for storing the received time. (B) is an example of a reception buffer having a storage area 3201 for the received time.

  FIG. 24 shows that “the number of EMM / EMM individual messages addressed to the same receiver to be processed for the CAS module is at least one for 30 seconds per entity. EMMs exceeding this number are discarded in 30 seconds”. It is a process flowchart of a receiver at the time of adding regulation.

  An example will be described with reference to FIG. When receiving the EMM from the MMT demultiplexing unit 1803-1 or the TS decoding unit 1803-1, the control unit 1806 starts processing request transmission processing to request the CAS module 1811 to perform EMM processing (S2400).

  The control unit 1806 has an EMM buffer for temporarily storing the EMM sent from the MMT demultiplexing unit 1803-1 or the TS decoding unit 1803-1 for the CAS module 1811 to control the order of EMM processing requests. to manage.

  The control unit 1806 checks the contents of the EMM reception buffer (S2401).

  As a result of the confirmation, if there is data waiting for request transmission in the CAS card module 1811 in the EMM reception buffer (Yes in S2402), the control unit 1806 confirms the elapsed time from the reception time of the data (S2404).

  When the elapsed time of confirmation exceeds 30 seconds (Yes in S2404), the corresponding EMM data is cleared (S2405). After clearing the data (S2405), the control unit 1806 returns to S2401 and continues the process.

  If the elapsed time of confirmation does not exceed 30 seconds (No in S2404), the control unit 1806 issues a processing request command to the CAS module and waits for a response (S2406). Upon receiving the response from the CAS module 1811, the control unit 1806 ends the process in order to confirm the priority with the ECM.

  As a result of checking the EMM reception buffer (S2401), the control unit 1806 terminates the processing if there is no data waiting for request transmission in the CAS card module 1811 (No in S2402) (S2403). ).

  Note that since the process of EMM has low immediacy, the start of the process in FIG. 24 may be controlled by the control unit 1806, for example, by polling or the like.

  Furthermore, this embodiment has the EMM reception buffer shown in FIG. 23, and controls the EMM processing request in the processing flowchart as shown in FIG. 24. For example, the management of each EMM buffer waiting for processing is performed for each business entity. It is also conceivable that the reception time is judged, and if the EMM received within 30 seconds already exists in the EMM buffer, the EMM received later is discarded.

  FIG. 25 is a flowchart of the process shown in FIG. 24, in which “the reception time of the EMM buffer managed for each business entity and waiting for processing is determined, and the EMM received within 30 seconds already exists in the EMM buffer. FIG. 11 is a processing flowchart of the EMM reception of the receiver when a rule “discard EMM received later” is added.

  Similarly, FIG. 18 will be described as an example. When receiving the EMM from the MMT demultiplexing unit 1803-1 or the TS decoding unit 1803-1, the control unit 1806 starts an EMM reception process for storing the received EMM in the EMM reception buffer (S2500).

  Here, it is assumed that the EMM reception buffer has an area for storing only one EMM data for each business entity.

  The control unit 1806 refers to the business entity of the received EMM data and confirms whether data is stored in the storage area of the same business entity in the EMM buffer (S2501).

  When the data of the same business entity is stored as a result of the confirmation (Yes in S2501), the control unit 1806 confirms whether 30 seconds have elapsed from the reception time of the stored data (S2502).

  If the result of the confirmation is within 30 seconds (Yes in S2502), the control unit 1806 discards the received EMM data (2506) and ends the process (S2506).

  If it is not within 30 seconds as a result of the confirmation (No in S2502), the buffer of the same business entity is cleared (S2503), the received EMM is stored in the buffer (S2504), and the process is terminated (S2505).

  When the data of the same business entity is not stored as a result of the confirmation (No in S2501), the control unit 1806 stores the received EMM in the buffer (S2504) and ends the process (S2505).

  As described above, in order to examine how many tuners can be designed with one CAS module (IC card), the ECM update period, the ECM retransmission period, and the installed CAS module (IC card) In addition to the response performance of the EMM, the frequency of transmission per ID per EMM entity, or the minimum number of EMMs to be processed within the EMM processing grace period is specified on the transmission / reception system. Therefore, it is possible to study the number of tuners that can be processed with exactly one CAS module.

  In TR-B39 Vol.5 “4.9.3.1 Sending frequency of EMM section and EMM individual message section”, in order to reduce the processing burden on the receiver, EMM / EMM individual messages addressed to the same receiver are not sent in a concentrated manner. Considering this, the maximum number of EMM or EMM individual messages sent to the same receiver is 8 per 8 seconds. Is prescribed. This rule is that, in all tuners of 8K, 4K, and 2K that are installed in the EMM addressed to the CAS module ID of the receiver, there is no possibility that all EMM processing grace periods (eg 30 seconds) are transmitted simultaneously. 4K (or 8K) depending on the timing of EMM transmission by the on-board tuner, although it may be possible in the EMM processing grace period (for example: 30 seconds) after receiving EMM for 8 EMMs received in 8 seconds other than ECM processing ) Even if 8 EMMs can be received in 8 seconds in the tuner, there is a possibility that processing cannot be completed in 30 seconds after reception. Originally, 8 EMMs should be sent every 30 seconds in order to perform EMM processing without being missed by the receiver, but if the broadcaster allows it, 8 EMMs received in 8 seconds are EMMs. Even if the processing grace period (30 seconds) has passed, one EMM process is performed at least every 30 seconds without discarding, and 8 cached EMMs are processed once in the EMM grace period (example 30 seconds). Since the object of the present invention can be achieved even if processing is allowed for a period × 8 (eg, 240 seconds), there is no problem in the object and effect of the present proposal that it is defined as an exceptional case. Therefore, it is important to define rules that can be transmitted and received in consideration of the performance of the CAS module so that the receiver can perform EMM processing without losing it.

As described above, according to the present embodiment, the first control information (EMM) including at least the encrypted first key (Kw) and the second control information (ECM) including the encrypted second key (Ks). A tuner unit that receives a service signal including scrambled content, a descrambler that receives the scrambled content output from the tuner unit, at least the tuner unit, a control unit that controls the descrambler, and the control unit The first key (Kw) is acquired from the first control information (EMM) using the unique third key (Km), and the first key (Kw) is acquired from the second control information (ECM). A CAS module that obtains the second key (Ks) to be given to the descrambler using one key (Kw),
The control unit should process the first control information (EMM) per business entity at least R (integer greater than or equal to 1) within the processing grace period to the CAS module after receiving the EMM defined in the regulations. After the first control information (EMM) of the one entity is detected and R processes are performed within the EMM processing grace period, the next of the one entity is set. When one control information (EMM) is detected, a receiving device is provided that suppresses command transmission to the card unit for at least the first control information (EMM) within the EMM processing grace period.

As can be understood from the above description, the above-described embodiment naturally has functions as a receiver, and features as a transmitter and a transmission / reception system. Hereinafter, further important points in the above-described embodiment will be described together.
(1) The maximum number of EMM / EMM individual messages sent to the same receiver is M (see * 2 described later) per 30 (see * 1) seconds per entity.
(2) The maximum number of EMM / EMM individual messages sent to the same receiver is 30 M (see * 2 below) per entity (see * 1 below) per second, and M2 (see * 3 below) per second. (See * 2, 4 below).
(3) The maximum number of EMM / EMM individual messages sent to the same receiver is M2 (see * 2, 4 below) per 2 entities (see * 3 below).
(4) The maximum number of EMMs sent to the same receiver is 30 (see * 1 below) per entity per second (see * 2 below) per second, and 30 EMM individual messages per entity (see * 1 below). ) Maximum M3 per second (see * 2 and 5 below).
(5) The maximum number of EMMs sent to the same receiver is 30 (see * 1 below) per entity per second (see * 2 below), and 2 EMM individual messages per entity (see * 3 below). ) Maximum M3 per second (see * 2 and 5 below).
The maximum number of EMMs sent to the same receiver is M * 2 per entity (see * 3 below) per second, and the maximum number of EMM individual messages is 30 Ms per entity (see * 1 below). * See 2, 5).
* 1 ... 30 seconds is the grace period until processing is performed for CAS after receiving the EMM / EMM individual message specified in the current operational regulations.
* 2 ... The numbers of TR-B14 and B15 are the same, TR-B39 has different values,
* 3 ... 2 seconds is the operation regulation TR-B14 for the current broadcast (2K), ECM (Ks) update period for TR-B15, 8 seconds for the advanced BS / CS (4K8K) TR-B39,
* 4 ... M2 is the case where the value of M is 3 or more, etc., and when it is necessary to stipulate sending in bursts within one Ks update cycle,
* 5 ... The response time performance of CAS of EMM and EMM individual message is actually different. Although there are few operations of EMM individual messages, EMM is a draft rule that takes into account the demands of businesses that want to change the frequency.

Furthermore, various effects can be obtained by the configuration of the receiver as described below. That is,
(B1)
Receive at least first control information (EMM) including an encrypted first key (Kw), second control information (ECM) including an encrypted second key (Ks), and a service signal including scrambled content. A tuner unit, a descrambler that receives the scrambled content output from the tuner unit, a control unit that controls at least the tuner unit and the descrambler, and a control unit that controls the first control information (EMM) ) To obtain the first key (Kw) using a unique third key (Km), and from the second control information (ECM) to obtain the first key (Kw) A CAS module for obtaining the second key (Ks) for giving to the descrambler,
The controller is
It is set that the first control information (EMM) per business entity should be processed at least R (integer of 1 or more) within the processing grace period to the CAS module after receiving the EMM specified in the regulations. After the first control information (EMM) of the one entity is detected and R processes are performed within the grace period of the EMM process, the first control information next to the one entity A receiving device that, when detecting (EMM), suppresses command transmission to the card unit for at least the first control information (EMM) within the grace period.

According to the configuration of (B1) above, even if there is exactly one CAS module, the receiver (9) can enable viewing of the contracted program without missing the ECM and EMM processing necessary for descrambling. Or a transmission device or a transceiver).
(B2)
In the receiver, the control unit determines whether the tuner unit receives the first control information (EMM) when the terrestrial digital television broadcast is received and when the BS digital broadcast / broadband CS digital broadcast is received. ) Is sent on the premise that the frequency is the same, or on the premise that the number of processing obligations of the first control information (EMM) is the same, to determine the frequency or the number The first control information (EMM) is processed using the same information.

According to the configuration (B2), there is an advantage that the number of EMM frequencies (duty of processing) of TR-B 14 and TR-B 15 is the same. In other words, TR-B14 and TR-B15 are standard specifications of 2K TV for terrestrial digital, BS and 110CS, and regardless of broadcasting media (terrestrial digital, BS, 110CS) The same EMM processing frequency rule does not complicate the mounting conditions in the CAS processing. If the conditions are the same, verification is easy at the receiver development stage, and TR-B14 and B15 are the same B-CAS system when the number of transmissions is specified, and EMM transmission equipment can be shared.
(B3)
In the case where the tuner unit receives terrestrial digital television broadcast and the case where the tuner unit receives advanced broadband satellite digital broadcast,
Assuming that the frequency with which the first control information (EMM) is sent within the grace period (for example, 30 seconds) is different, or that the number of processing obligations of the first control information (EMM) is different. Based on the premise, the first control information (EMM) is processed with different information for determining the frequency or the number of pieces.

According to the configuration of (B3) above, TR-B14 is terrestrial digital and allows pay broadcasting according to the operation rules, but is substantially only free broadcasting, and the possibility of operation of EMM is extremely low. The EMM, which is different from the pay-broadcast-required TR-B39, is likely to be able to process more ECMs. By setting the frequency of the TR-B14 low, the number of terrestrial digital tuners installed Is likely to increase.
(B4)
In the case where the tuner unit receives BS digital broadcast / broadband CS digital broadcast and the case where the tuner unit receives advanced broadband satellite digital broadcast,
Assuming that the frequency with which the first control information (EMM) is sent within the grace period (for example, 30 seconds) is different, or that the number of processing obligations of the first control information (EMM) is different. As a premise, the first control information (EMM) is processed with different information for determining the frequency or the number.

According to the configuration of (B4) above, even if the command response performance of the EMM and ECM in the TR-B39 compliant CAS module is different from the command response performance of the TR-B14,15 pure IC card, the TR-B39 compliant Other EMM frequencies can be set according to the performance of the CAS module. Since TR-B39 can acquire EMM even via a communication path, the frequency setting differs from TR-B14 and TR-B15, which can only transmit EMMs using only broadcast waves. (TR-B39 is reduced), TR-B39 is intended for later digital broadcasting compared to 2K broadcasting such as TR-B14 and TR-B15, so new 4K8K paying subscribers To improve service, increase the number of EMMs sent for a certain period of time, and even if EMMs are missed at the receiver, E By performing the M reception it is possible to in a short period of time from subscription to key drilling (EMM reception). In TR-B39, it is also possible to prescribe the priority order by EMM acquisition via a communication channel and EMM acquisition via a broadcast wave. For example, to unlock a pay view immediately via a communication channel. Needless to say, raising the processing priority of EMM via communication after ECM is also effective in terms of user convenience.
(B5)
In the case where the tuner unit receives terrestrial digital television broadcast, BS digital broadcast / broadband CS digital broadcast, and advanced broadband satellite digital broadcast. Assuming that the frequency at which the first control information (EMM) is sent is the same, or assuming that the number of processing obligations of the first control information (EMM) is the same, The first control information (EMM) is processed using the frequency or the number of pieces of determination information in common.

According to the configuration (B5) above, the processing at the receiver is simplified. The same EMM processing timing is possible regardless of the reception network (terrestrial digital, 2KBS, 2KCS, 4K8KBS, 4K110CS).
(B6)
In the first case where the tuner unit receives BS digital broadcast / broadband CS digital broadcast and the first case where the tuner unit receives advanced broadband satellite digital broadcast,
On the assumption that the frequency at which the first control information (EMM) is sent is the same, or on the assumption that the number of processing duties of the first control information (EMM) is the same, the frequency Alternatively, the first control information (EMM) is processed by using the number of pieces of determination information in common.
In the second case where the tuner unit is receiving digital terrestrial television broadcasting, the first control information (where the frequency or the number of pieces of information is determined differently from the first case). EMM).

According to the configuration (B6) above, the frequency with which EMMs are sent is different for TR-B14, and B15 and B39 have the same frequency. TR-B15 and TR-B39 including a pay system and terrestrial digital broadcasting (which is divided by TR-B14) without substantial pay broadcasting have advantages similar to the above (B3). Moreover, it is highly possible that the number of terrestrial digital tuners mounted can be increased by setting the frequency at TR-B 14 low.
(B7)
The tuner unit receives the first control information (EMM) corresponding to the one business entity and an EMM individual message transmitted to each receiver and indicating a pointer of an automatic display message;
Receive EMM individual message,
The control unit processes the first control information (EMM) corresponding to the one business entity and the EMM individual message separately.

(B8) <Configuration in which the number of EMM frequencies (processing obligations) of EMM and EMM individual messages is different>
The tuner unit receives the first control information (EMM) corresponding to the one business entity and an EMM individual message transmitted to each receiver and indicating a pointer of an automatic display message, and the control unit receives the one business entity. To determine the frequency of the first control information (EMM) and the frequency of the EMM individual message on the premise that the frequencies of the first control information (EMM) and the EMM individual message corresponding to each other are different from each other The first control information (EMM) and the EMM individual message are processed with different information.

According to the configurations of (B7) and (B8) above, the numbers of EMM frequencies (processing obligations) of EMMs and EMM individual messages are different. As a result, it is assumed that the CAS module response performance of the EMM and the EMM individual message are different from each other, the short response time and the size of the EMM individual message are predicted to be smaller than the EMM, and the response performance is assumed to be short. Therefore, it is possible to define that the frequency is higher than that of EMM. Compared to EMM, EMM individual messages are individual parts (for example, subscriber names) for each ID of EMM mail and automatic display messages, and the actual usage frequency is considered to be low, and the contract is being called. EMM or ECM processing is performed by reducing the frequency of EMM because it is difficult to request immediateness, such as checking the number of times, that is, by setting the number in a span longer than the EMM processing grace period or by reducing the number in the same processing grace period It is expected as an advantage that the time to be turned on is increased.
(B9)
The frequency of the first control information (EMM) is set according to a processing grace period of the first control information (EMM).

According to the configuration of (B9) above, the EMM frequency is determined by the EMM processing grace period. With this, the number of EMMs required at any time within the grace period is processed. It can be said that it is a useful setting method. When considering the flow of the receiver, the degree of freedom increases if it is decided in this period.
(B10)
The frequency of the first control information (EMM) is set based on an update period of the second key (Ks) of the first control information (EMM).

According to the configuration of (B10) above, the EMM frequency is determined by the Ks update cycle. The EMM processing grace period is currently 30 seconds, and the Ks update cycle is shorter. In considering the EMM filtering performance at the receiver, the provision of the number in a short time is meaningful in terms of how many EMMs may be addressed to the self in a short time. However, it is a case where a business operator issues a plurality of EMMs in a short time. In addition, issuing multiple EMMs in a short time is effective if you want to send the same EMM in a short time if you want to acquire the EMM as soon as possible. However, if only the EMM transmission rate is used, the EMM cache area increases as long as the processing grace period (30 seconds) remains, so the number of EMMs is not the transmission rate but is used to estimate the temporary EMM cache area. Is effective.
(B11)
<Determine EMM frequency by Ks update cycle>
The frequency of the first control information (EMM) is set based on a processing grace period of the first control information (EMM) and an update period of the second key (Ks) of the first control information (EMM). Being,
According to the above configuration (B11), in the configuration (B11), the EMM frequency is determined by the Ks update cycle. For example, if a receiver needs to receive one message every 30 seconds, but it wants to receive it as soon as possible, for example, “The receiver needs at least one process per entity in 30 seconds. Sending out at a rate of 2 in 2 seconds, but after receiving EMM, EMM acquired in 30 seconds can be discarded or not received. Therefore, the remaining time can be used for EMM and ECM processing of other tuners, and EMM can be received more quickly by sending more EMMs for a certain period of time, allowing viewers to confirm the contract in a shorter time. In addition, the receiver side can also estimate the amount of temporary EMM cache.

In addition to the above points, in the present embodiment, a broadcast signal transmission system described below.
Are also included, that is,
(C1)
On the receiving side,
Receive at least first control information (EMM) including an encrypted first key (Kw), second control information (ECM) including an encrypted second key (Ks), and a service signal including scrambled content. A tuner unit, a descrambler that receives the scrambled content output from the tuner unit, a control unit that controls at least the tuner unit and the descrambler, and a control unit that controls the first control information (EMM) ) To obtain the first key (Kw) using a unique third key (Km), and from the second control information (ECM) to obtain the first key (Kw) A CAS module (IC card) for obtaining the second key (Ks) for giving to the descrambler is provided, and a transmission facility includes the first key per business unit. Frequency control information (EMM) is sent has set to be a minimum R (1 or more integer) within EMM processing grace period (30 seconds), the broadcast signal transmission system.
(C2) In terrestrial digital television broadcasting and BS digital broadcasting / broadband CS digital broadcasting,
Each of the transmission facilities is assumed to have the same frequency of sending the first control information (EMM), or the number of processing obligations of the first control information (EMM) is the same,
The broadcast signal transmission system according to C1, wherein the first control information (EMM) can be processed by sharing information for determining the frequency or the number on the receiving side.
(C3) In the terrestrial digital television broadcast and the advanced broadband satellite digital broadcast, the frequency of the first control information (EMM) being transmitted by each of the transmission facilities within an EMM processing grace period (30 seconds) is different, or The number of processing obligations of the first control information (EMM) is different, and the first control information (EMM) can be processed by varying the frequency or the information for determining the number on the receiving side. The broadcast signal transmission system according to C1.
(C4) In digital terrestrial television broadcasting, BS digital broadcasting / broadband CS digital broadcasting, and advanced wideband satellite digital broadcasting, each of the transmission facilities transmits the first control information (EMM) within an EMM processing grace period (30 seconds). ) Is sent, or the number of processing obligations of the first control information (EMM) is different, and the frequency or information for determining the number is different on the receiving side. The broadcast signal transmission system according to (C1), wherein the control information (EMM) can be processed.
(C5) In BS digital broadcasting / broadband CS digital broadcasting and advanced broadband satellite digital broadcasting, the transmission facilities transmit the first control information (EMM) at the same frequency, or the first control. The number of processing obligations of information (EMM) is the same, and the first control information (EMM) can be processed by making the frequency or the number of determination information common on the receiving side. The broadcast signal transmission system according to C1).
(C6) In the first case of BS digital broadcasting / broadband CS digital broadcasting and advanced wideband satellite digital broadcasting, the transmission facilities have the same frequency at which the first control information (EMM) is sent. Alternatively, the number of processing obligations of the first control information (EMM) is assumed to be the same, and the first control information (EMM) is processed using the frequency or the number determination information in common on the receiving side. In the second case of digital terrestrial television broadcasting on the receiving side, the information for determining the frequency or the number is different from the first case, and the first control information ( The broadcast signal transmission system according to (C1), wherein the EMM) can be processed.
(C7) The transmission facility transmits the first control information (EMM) corresponding to the one business entity and an EMM individual message indicating a pointer of an automatic display message transmitted for each receiver. The broadcast signal transmission system according to (C1), wherein the first control information (EMM) corresponding to the one business entity and the EMM individual message are processed separately.
(C8) The transmission facility transmits the first control information (EMM) corresponding to the one business entity and an EMM individual message indicating a pointer of an automatic display message transmitted for each receiver. Assuming that the frequencies of the first control information (EMM) and the EMM individual message corresponding to one entity are different from each other, the frequency of the first control information (EMM) and the frequency of the EMM individual message are The broadcast signal transmission system according to (C1), wherein the information for determination is made different so that the first control information (EMM) and the EMM individual message can be processed.
(C9) The broadcast signal according to any one of C1 to C8, wherein the frequency of the first control information (EMM) is set according to a processing grace period of the first control information (EMM). Transmission system.
(C10) Any one of the above C1 to C8, wherein the frequency of the first control information (EMM) is set based on an update period of the second key (Ks) of the first control information (EMM) The broadcast signal transmission system according to 1.
(C11) The frequency of the first control information (EMM) is determined by the processing grace period of the first control information (EMM) and the update period of the second key (Ks) of the first control information (EMM). The broadcast signal transmission system according to any one of C1 to C8, which is set based on the above.

  The following relates to identification information corresponding to an encoded signal 3200 (audio signal, video signal, caption signal, etc.) having an attribute suitable for a viewer who is not free of visual or auditory sense, or identification information corresponding to a foreign language sub-audio signal. A setting method in this embodiment will be described.

  Prior to that, we will define terms that will be used in future explanations. As described with reference to FIG. 1, a signal transmitted from the broadcast station 100 is referred to as a broadcast signal. The broadcast signal transmission medium is not limited to a broadcast wave, and a cable or a communication network may be used.

  In FIG. 1, the application communication method via the communication network is also described. A signal transmitted via a wired or wireless communication network is called a communication signal.

  Both the broadcast signal and the communication signal include at least one of a transmission control signal (control signal 3100) and an encoded signal 3200. As already described with reference to FIG. 1, video signals and audio signals are “encoded”, multiplexed and transmitted. Therefore, both the video signal to be transmitted and the audio signal are “encoded” signals. The encoded signal 3200 here includes not only the encoded video signal VDO and the encoded audio signal AUD, but also subtitles, character supertext, metadata, symbols / codes, and the like.

  In the present embodiment, the encoded signal 3200 is treated as a synonym for the elementary stream ES. For example, as will be described later with reference to FIG. 35, the elementary stream ES that is the encoded signal 3200 is packetized (divided) and transmitted. This transmission form is called a packetized elementary stream PES.

  As shown in FIG. 35 (b), a PES packet is configured by combining an encoded video signal VDO or an encoded audio signal AUD and a packetized elementary stream header PESHD preceding the encoded video signal VDO or encoded audio signal AUD. Then, as shown in FIGS. 35 (a) and 33 (a), it is transmitted as a broadcast signal in combination with the transport stream packet header TSHD preceding the PES packet. Therefore, in the present embodiment, the transport stream packet header TSHD and the packetized elementary stream header PESHD are also included in the encoded signal 3200 or the elementary stream ES.

  Similarly, in the system of the present embodiment, the transport stream packet header TSHD, the table identification TID (FIG. 26C), and the like are also considered as a part of the control signal 3100 (transmission control signal).

  In another example of the system of the present embodiment, the contents of the control signal 3100 and the encoded signal 3200 are inserted into an MPEG (Moving Picture Experts Group) media transport protocol packet MMTP, as will be described later with reference to FIG. Then transmit. Accordingly, various types of information transmitted at the same time are handled as part of the control signal 3100 and the encoded signal 3200.

  Specifically, the packet identifier MPID (FIG. 53 (a)) included in the MPEG media transport protocol packet header MMTH and various information in the Internet protocol header IPH are also included in the control signal 3100 and the encoded signal 3200. .

  By the way, the difference between the encoded video signal VDO and the encoded audio signal AUD (and subtitles, character super, metadata, symbol / code) in the present embodiment is regarded as a difference in “attribute” of the elementary stream ES. The difference between the main audio (or main video) and the sub audio (or sub video) can also be regarded as the difference in the attributes. Furthermore, commentary voices, voices for foreign languages, video with sign language, subtitle display language, and the like may be identified as “difference in attributes”. Information representing the difference between these attributes is called “identification information”.

  On the other hand, as will be described later with reference to FIGS. 26 to 30, 33, 35, 45, and 52 to 53, the inside of the control signal 3100 has a hierarchical structure and a data structure. A predetermined numerical value is set in the form of a binary code (bit string) in each data structure for each hierarchical structure. Each “frame” in which the predetermined numerical value is set is called a “parameter setting area” in the present embodiment.

  A state where a predetermined numerical value or a numerical value within a predetermined range is set in the parameter setting area means predetermined “identification information”.

In the present embodiment, among the attributes of the encoded signal 3200, 1) the encoded signal 3200 has an attribute suitable for a viewer who is not free of vision or hearing, and 2) has an attribute corresponding to a foreign language sub-audio signal. Encoded signal 3200
The identification information on is newly set (defined). And this identification information is arrange | positioned in a broadcast signal or a communication signal, and is transmitted.

  The receiver 140 (FIG. 1) side extracts / identifies / determines the identification information included in the received broadcast signal or communication signal, and selectively extracts the encoded signal 3200 corresponding to the identification information. . That is, when the identification information is included in the broadcast signal or communication signal, the corresponding encoded signal 3200 can be preferentially selected. Even if the identification information is not included, there is no problem because the receiver 140 can select the default audio signal.

  In this way, in the present embodiment, the receiver 140 includes means capable of discriminating attributes such as commentary audio, sign language video, and video including subtitles from broadcast signals or communication signals. The receiver 140 preferentially selects means for selecting the contents of the sub-audio such as “select when commentary audio is broadcast”, “select when English audio is broadcast”. It has.

  The receiver 140 according to the prior art includes an encoded signal 3200 having an attribute suitable for a viewer who is not free of visual or auditory sense (for example, subtitle broadcasting or sign language broadcasting in a predetermined language, or an elementary corresponding to commentary speech in a predetermined language). There was no means to discriminate stream ES). Therefore, the viewer needs to switch video signals and audio signals every time the channel selection is switched.

  When the identification information is newly set (defined) and transmitted, the receiver 140 can selectively extract the encoded signal 3200 having the attribute using the identification information. As a result, the switching operation of the video signal and the audio signal depending on the viewer every time the channel selection channel is switched becomes unnecessary, leading to an improvement in service to the viewer. That is, it does not require commentary voices for viewers who are not free of audiovisual senses, or viewers who mainly want to select foreign language broadcasts to perform an audio selection operation each time a channel is changed or the power is turned on.

 That is, the receiver 140 side could not grasp what type of audio the secondary audio elementary stream ES (encoded signal 3200) is. For example, let us consider a case where a service for viewers who is not free of visual and auditory sense or a foreign language voice for foreigners in Japan is operated as a broadcasting service. In that case, it is necessary to switch to an audio signal or video signal adapted by a user operation every time the receiver 140 is started up or the channel selection channel is changed. Especially for viewers who are not visually free, it is difficult without the support of healthy people from confirmation of the presence or absence of the service to switching operation of the channel selection.

  In the present embodiment example described in detail below, the receiver 140 can grasp the attributes (contents) of the sub audio elementary stream ES (encoded signal 3200). As a result, there is an effect that the receiver 140 can automatically extract the encoded signal 3200 that matches the attribute and display it to the viewer (user).

  In particular, in this embodiment, for example, the framework of the parameter setting area set in the existing standard (for example, Non-Patent Document 1 to Non-Patent Document 3) issued by the Japan Radio Industry Association (ARIB) may not be changed. . Instead, a predetermined numerical value or a predetermined numerical value range to be inserted into the parameter setting area may be newly set to have a meaning as “identification information”.

  The implementation of the present embodiment described above corresponds to a change only in operation rules (for example, technical documents shown in Non-Patent Document 4 to Non-Patent Document 6). The change of the standard is accompanied by a significant change of the equipment already installed in the broadcasting station 100 (FIG. 1), resulting in a great expense. The small change of the numerical value (or numerical value range) inserted into the parameter setting area as in the present embodiment eliminates the need for equipment change with a large expense, and has the effect of enabling easy and quick response.

  The effect of using “identification information” when multilingual audio is transmitted as a sub audio signal as a foreign language audio signal for foreign residents in Japan, which is a kind of broadcasting service, will be described.

  In recent years, with the increase in overseas tourists visiting Japan and the increase in foreigners living in Japan for a long time, the diversification of languages used in Japan has increased rapidly. In accordance with the diversification of languages used, the types of languages that should be supported as sub audio signals (elementary streams ES) increase. When multiple types of languages are transmitted simultaneously as sub audio signals (elementary streams ES), the complexity of language selection (sub audio signal selection) that the user (viewer) wants to hear increases.

  In the system of the present embodiment, as will be described in detail later, “identification information” of a language used in the sub audio signal is set. As a result, the user (viewer) is released from the burden of language selection at each channel change or when the power is turned on, and the convenience of the multilingual audio providing service is improved.

  As a multilingual response, most foreigners in Japan can be covered in four languages: Japanese, English, Chinese, and Korean. For this reason, even today's home appliance mass retailers are responding with guidance in these four languages.

  By the way, when the multilingual service is supported as subtitles displayed by the receiver 300, it is necessary to install character fonts corresponding to the languages. However, the current television receiver 300 does not include Chinese and Korean character fonts. For example, in order to provide a multilingual subtitle service at the 2020 Tokyo Olympics and Paralympics, it is necessary to spread receivers equipped with this font. And it takes time to spread the receiver 300 equipped with multilingual fonts (such as Chinese and Korean). Furthermore, in order to mount many fonts on the receiver 300 side, there arises a problem that a cost burden is generated.

  On the other hand, if it is a multilingual service using a sub audio signal, the receiver 300 can be handled very easily. In other words, since the receiver 300 can cope with the conventional decoding process of the audio signal, there is little increase in the new cost burden of the receiver 300 in the multilingual audio service.

  Furthermore, in this embodiment system, the effect that a user (viewer) only sets a specific language voice service once and does not require subsequent voice switching operation can be expected. This is because the receiver 300 (internal demultiplexer 304) determines whether or not the multilingual audio service is being implemented, and the “identification information” is used to preferentially select a language that is optimal for the user (viewer).

  In addition, in the middle of the broadcast signal or communication signal transmission path, local sub-audio signals (elementary stream ES), which are unique to local governments, facilities, and cable stations, are added to provide convenient service in specific areas. May be improved. For example, content other than urgent news is cached for several minutes (at each facility along the transmission route), translated and multiplexed, and retransmitted in each local area.

  In this way, by multiplexing the sub audio signal and sub video signal (at each facility along the transmission path) compliant with the system of the present embodiment (with predetermined identification information set), a unique service closely related to the region is provided. There is an effect that can be done.

  A broadcast signal is transmitted from the broadcast station 100 of FIG. In the broadcast signal, the control signal 3100 and the encoded signal 3200 are inserted into the transport packet TSP that is continuously and repeatedly transmitted.

  As shown in FIG. 26A, the control signal 3100 is inserted into the payload PYLD region in the transport packet TSP. Then, the signals in the payload PYLD area are collected to form a section SCT (FIG. 26 (b)). Information of the same content can be described across a plurality of sections SCT, and it is possible to cope with an increase in information of the control signal 3100 having the same content. In this case, a frame (parameter setting area) for setting the section number SCN is provided as shown in FIG. 26 (c) in order to make it possible to determine the front-rear relationship between the plurality of sections SCT.

  The contents of the control signal 3100 are classified into a plurality of different tables. A table name and a set value are predetermined for each function, role, or content. Then, the setting value corresponding to each table is set in the table identification TID as shown in FIG.

  In addition to the table identification TID, there is a packet identification PID (described later using FIG. 33B) as a parameter setting area corresponding to each table. Having the parameter setting area corresponding to the same table has an effect of increasing the accuracy of extracting the predetermined table on the receiver 140 side.

  That is, the demultiplexer 304 (FIG. 3) in the receiver 140 first extracts the transport stream packet TSP in which the contents of the same table are described using the set numerical value of the packet identification PID. Immediately thereafter, it is possible to determine whether or not a predetermined table has been collected by judging the set numerical value in the table identification TID. Therefore, by arranging the table identification TID at the first position in the section SCT, there is an effect of improving the quickness of checking the table contents.

  A numerical value “1” is set in a syntax instruction frame (parameter setting area) following the table identification TID.

  In each table excluding the program association table PAT, one or more descriptors DCR can be arranged. A plurality of types of descriptors DCR are defined for each content of information specified for each table. Descriptors DCR that can be set for each table are determined in advance. The broadcast station 100 can select the contents of the descriptor DCR set in each table as appropriate according to the contents of the broadcast signal.

  The upper 2 digits “0x” of each set value in FIG. 26D means a description in hexadecimal notation. Hereinafter, when “0x” is added to the upper two digits of the numerical value, a hexadecimal display is shown, and a display without “0x” is a binary (binary bit) display.

  Here, the program map table PMT designated by the setting value “0x02” transmits common information among the packet identification PID of the transport stream packet TSP for transmitting each encoded signal constituting the broadcast program and the related information of the pay broadcast. The packet identification PID of the transport stream packet TSP to be specified is designated.

  The program association table PAT specified by the set value “0x00” specifies the packet identification PID of the transport stream packet TSP that transmits the program map table PMT related to the broadcast program.

  The conditional access table CAT designated by the set value “0x01” designates the packet identification PID of the transport stream packet TSP that transmits the individual information among the related information of the pay broadcast.

  The network information table NIT specified by the setting value “0x40” or “0x41” transmits information that associates information on the transmission path such as the modulation frequency with the broadcast program. The event information table specified by the setting values “0x4E to 0x6F” instructs information related to the program such as the program name, broadcast date and time, and description of the contents.

  In the system of the present embodiment, the content content provided to the viewer is called “service”. Different service identification (service_id) SVIDs are associated with each service content (FIG. 27E).

  The data structure in the program map table PMT is shown in FIG. The retransmission period of the program map table PMT from the broadcasting station 100 side is about 100 ms. In addition, the retransmission cycle in the case of a partial reception layer such as one segment is 200 ms. Any retransmission cycle is 1 second at maximum.

  The program number PRN corresponds to broadcast program number identification. This number is determined to be the service_id of the target service.

  For each encoded signal information ESIF, a combination of a stream format identification STID of the encoded signal, a packet identification EPID of the encoded signal, and one or more corresponding descriptors DCR is set.

  Within the same encoded signal information ESIF, the stream format identification STID of this encoded signal is the reference. Then, at least a part of the elementary stream ES (encoded signal 3200) corresponding to the stream format identification STID of the encoded signal is attached to the payload PYLD of the transport stream packet TSP (FIG. 33 (a)). Then, the setting value in the packet identification PID in the transport stream packet TSP is set in the frame (parameter setting area) of the packet identification EPID of the encoded signal.

  By the way, when the receiver 140 (FIG. 1) receives the program map table PMT, it is determined whether or not the stream format identification STID of the encoded signal corresponds to the receiver 140. When the stream format identification STID of the encoded signal that does not correspond is described, it is determined that the content of the corresponding encoded signal information ESIF is invalid.

  As shown in FIG. 26C, various descriptors DCR can be described in the section SCT. As an example thereof, FIG. 27A shows a data structure in the access control descriptor ACDR that can be described in the program map table PMT. Here, the upper row in FIGS. 27A and 27E represents the number of bits arranged for each parameter setting area. And as a broadcast signal, this number of arrangement bits is transmitted from the broadcasting station 100 in ascending order from a small value.

  This access control descriptor ADDR specifies the setting value in the packet identification PID in the transport stream packet TSP that transmits the common information ECM 410 (FIG. 4A) of the conditional access method and the transmission path when the entire service is the limited reception target. To do.

  That is, the BS designates the set value of the packet identification PID of the transport stream packet TSP that transmits the common information ECM 410 (FIG. 4A) using only the conditional access method descriptor (not shown). On the other hand, terrestrial digital broadcasting is the same scramble key Ks401 (FIG. 4A) called B-CAS (BS Conditional Access Systems) and terrestrial broadcast RMP (Right Management and Protection) management center TRMP, but two different CAS (Conditional Access Systems). The system is operating.

  That is, the common information ECM 410 of the B-CAS having a chargeable charging function specifies the set value of the packet identification PID of the transport stream packet TSP that transmits the common information ECM 410 by the conditional access method descriptor.

  On the other hand, the set value of the packet identification PID of the transport stream packet TSP for transmitting the TRMP common information ECM 410 having no pay function is specified by the access control descriptor.

  At the start of BS digital broadcasting in 2000, only conditional access system descriptors were available. When performing TRMP system simultaneous operation with terrestrial digital broadcasting, the set value of the packet identification PID of the transport stream packet TSP that transmits two different pieces of common information ECM 410 is designated by the same program map table PMT. The receiver 300 acquires the scramble key Ks401 with the common information ECM 410 that matches the method of the corresponding conditional access system identification CA_System_id. Therefore, an access control descriptor ACDR that is similar to the conditional access system descriptor is created and described in the program map table PMT.

  The descriptor tag DSTG arranged at the head in the access control descriptor ACDR is framed from the first bit to the eighth bit. In this area, a value of “0xF6” is set. In the conditional access system identification CAID, the conditional access system identification is described. Specifically, only a numerical value for identifying a predetermined conditional access system or an identification value applied to digital terrestrial television broadcasting is set.

  In the transmission information TRTY, the ECM transmission path type of the conditional access system is described. In the present embodiment, “111” is set in a bit display in this parameter setting area to indicate a broadcast route.

  The value of the packet identification PID (FIG. 33 (a)) indicating the transport stream packet TSP in which the ECM 410 (FIG. 4A) is stored in the common information identification ECM-PID consisting of the program information and the control information related to the pay viewing right. Is set.

  FIG. 27C shows a data structure in the program association table PAT. The retransmission period of this program association table PAT is set to around 100 ms.

  The transport stream identification TSID represents the identification (transport_stream_id) of the transport stream itself including this program association table PAT.

  In the network packet identification, the packet identification PID of the corresponding network information table NIT is set. As will be described later with reference to FIG. 33B, “0x0010” is set in the packet identification PID of the network information table NIT. Therefore, “0x0010” is set in this parameter setting area.

  In the program association table PAT, a combination (encoded signal information ESIF) of packet identification PMPID of the program map table PMT corresponding to each service identification (service_id) SVID is defined.

  Accordingly, the service_id of the target service is described in the parameter setting area of the program number PRN. The value of the packet identification PMPID of the corresponding program map table PMT is set in the parameter setting area of the packet identification PMPID of the corresponding program map table in the same encoded signal information ESIF. It is assumed that the maximum number of programs (services) that can be assigned to the same packet identification PID value is 4. That is, when the packet identification PMPID of the same corresponding program map table is specified for different program numbers PRN, such as when the program map table PMT is multi-sectioned, the maximum number of program numbers PRN that can be specified is four. By setting the maximum value of programs (services) that can be assigned in this way, there is an effect of preventing the complexity of the processing in the receiver 140. However, since the multi-section transmission of the program map table PMT cannot be performed for the service of the partial reception layer, only one program number PRN can be designated for the packet identification PMPID of the same corresponding program map table.

  As indicated by the broken-line arrows from FIG. 27C to FIG. 27B, the same numerical value as the program number PRN set in the program association table PAT is the program number (broadcast program) in the corresponding program map table PMT. Number identification) described in the PRN.

  The demultiplexer 304 (FIG. 3) in the receiver 300 uses the packet identification PMPID of the corresponding program map table set in the program association table PAT, and converts the transport stream packet TSP in which the corresponding program map table PMT is stored. Extract. The set value of the program number (broadcast program number identification) PRN in the extracted program map table PMT can be determined, and the correctness of the extracted program map table PMT can be confirmed. As described above, the same setting value is set redundantly between different tables, so that the table acquisition accuracy is improved.

  A similar overlap setting can also be seen in the overlap setting of the transport stream identification TSID indicated by the broken-line arrow from FIG. 27 (c) to (d).

  FIG. 27D shows the data structure in the network information table NIT. The retransmission period of the network information table NIT is set to about 1 second (maximum 3 seconds).

  One network identification NETID is assigned to each transmission master in digital terrestrial television broadcasting. Also, in BS digital broadcasting, one is allocated through all channels, and in broadband CS digital broadcasting, two are allocated from the circumstances that were started by two different platform operators at the beginning of broadcasting (which was then integrated into the current one). One is allocated for advanced BS digital broadcasting and one is allocated for advanced broadband CS digital broadcasting.

  A second loop (TS loop) area STLP exists in the network information table NIT. In the second loop (TS loop) area STLP, information on the transport stream included in the target network is described.

  In the second loop (TS loop) area STLP, a parameter setting area for the original network identification ORGID is set. In the system of the present embodiment, two areas of network identification NETID and original network identification ORGID are used as labels relating to a distributed system (broadcast signal distribution system including not only broadcast waves but also via cables). The parameter setting area of the original network identification ORGID serves to help uniquely identify the service in the transport stream TS when the transport stream TS moves to another distribution system different from the original distribution system. To do.

  In other words, the service can be uniquely referred to by following the route of “original network identification ORGID → transport stream identification TSID → service identification SVID”. Here, the above route does not include the network identification NETID.

  When a service in a given transport stream moves to another distribution system, only the network identification changes and the original network identification ORGID does not change.

  Therefore, by using the two areas of network identification NETID and original network identification ORGID as labels related to the distributed system, even if a given service moves to another distribution system (because the service identification SVID does not change), the same service can be uniquely assigned. There is an effect that can be referred to.

  By the way, in this embodiment, the same numerical value as that of the network identification NETID described above may be described in the parameter setting area of the original network identification ORGID.

  A combination of one or more descriptors DCR is possible for each different numerical value set in the parameter setting area relating to the transport stream identification TSID. This combination is summarized as TS related information TSIF, and a combination of the individual TS related information TSIF is referred to as a “loop”. In digital terrestrial television broadcasting, the number of loops is 1.

  A TS information descriptor TSDR is described as an example of the descriptor DCR set in the TS related information TSIF (loop) in the second loop (TS loop) area STLP. In this TS information descriptor TSDR, various additional information accompanying the transport stream TS is described.

  In this embodiment, the TS information descriptor TSDR must be arranged in the second loop (TS loop) area STLP in the network information table NIT. In this case, “0xCD” is set in the parameter setting area of the descriptor tag DSTG.

  The upper part of FIG. 27E shows the arrangement bits of each parameter setting area. In the parameter setting area of the service identification (service_id) SVID arranged from the “49 + 8M” bit to the “64 + 8M” bit (M is “0” or a natural number), the service_id of the service whose service layer is the service layer is described. To do. The numerical value inserted here is the same value as the corresponding program number PRN.

  In the system of this embodiment, the recommended remote controller button number can be notified to the remote controller 352 (FIG. 3) of the receiver 300 for each service identification (service_id) SVID. Then, the ID value of the remote control key is set in the 8-bit parameter setting area from the 17th bit to the 24th bit.

  That is, the remote control key identification RCID corresponds to the function of assigning each operator by default to the buttons “1” to “12” provided in the remote controller 352 attached to the receiver 300 shown in FIG. And it assigns to a corresponding button with the number described in the parameter setting area | region of one remote control key identification RCID with respect to one provider.

  In FIG. 27E, a plurality of different service identification SVIDs can be set in parallel. In this case, a common recommended remote control button number corresponds to all the service identification SVIDs described in the TS information descriptor TSDR.

  Since the service identification (service_id) SVID exists in the TS information descriptor TSDR that is always installed in the network information table NIT, there is an effect that an error in the remote control button number can be prevented throughout the country. That is, when the receiver 300 with the remote controller 352 shown in FIG. 3 is moved far away in the country, the remote control button number can be reset using the above information throughout the country.

  When the number described in the parameter setting area of the remote control key identification RCID does not overlap, the number described in the parameter setting area of the remote control key identification RCID matches the number of the remote controller 352.

  This remote control key identification RCID is basically unique within the broadcast target area, and is basically adjusted so as not to overlap between adjacent areas. However, in rare cases, the numbers described in the parameter setting area of the remote control key identification RCID overlap (between adjacent areas) due to reception from other areas.

  In this case, the target broadcast station 100 (FIG. 1) is preferentially assigned according to the viewer residence area setting set in the receiver 300. Thereafter, the channel setting and the list of duplicate stations may be displayed, and the viewer may manually assign them. If the remote control key number is insufficient, the viewer may exclude out-of-range stations.

  The data structure in the program map table PMT of FIG. 27B is transcribed to FIG. A collection region of other descriptors DCR including the access control descriptor ACDR is referred to as a first loop region FLP. Also, a set area of one or more pieces of encoded signal information ESIF is referred to as a second loop (ES loop) area SELP.

  That is, there is an area for setting one or more pieces of encoded signal information ESIF in the second loop (ES loop) area SELP. In addition, the stream format identification STID of the encoded signal is arranged in the head area for each encoded signal information ESIF. A plurality of different descriptors DCR may be arranged in the same encoded signal information ESIF.

  Here, the stream identification descriptor SIDC is arranged as the first descriptor DCR within the same set numerical value (within the same encoded signal information ESIF) regarding the stream format STID of the encoded signal.

  This stream identification descriptor SIDC is used for labeling the corresponding encoded signal 3200 (elementary stream ES). A numerical value “0x52” is set in the descriptor tag DSTG arranged in the 1st to 8th bits.

  In the 8-bit parameter setting area from the 17th bit to the 24th bit, a numerical value corresponding to the component tag (component_tag) CMTG is set. In particular, the numerical setting of the component tag (component_tag) CMTG (arrangement of the stream identification descriptor SIDC) is essential for all the encoded signals 3200 (elementary stream ES) defined in the program map table PMT.

  In both channel selection and reservation, since the user (viewer) selects the encoded signal 3200 (elementary stream ES) from the control signal 3100, the component tag (which associates the user interface with the encoded signal 3200 (elementary stream ES) ( component_tag) The numerical value of CMTG is important.

  The demultiplexer 304 (FIG. 3) in the receiver 300 selects the encoded signal 3200 (elementary stream ES) based on the component tag (component_tag) CMTG at the time of channel selection, finds its packet identification PID, Separation / decoding is performed from the port stream TS.

  Accordingly, the encoded signal 3200 (elementary stream ES) being selected (displayed) is continuously decoded with the same component tag (component_tag) CMTG value. That is, for example, when the encoded signal 3200 (elementary stream ES) of component_tag = “0x11” is displayed, at least in the program being viewed, it is set to “0x11” unless the viewer performs any operation. Continue to decode the corresponding encoded signal 3200 (elementary stream ES). When the program is switched and the program map table PMT is updated, and the encoded program 3200 (elementary stream ES) corresponding to the set value of the component tag (component_tag) DMTG of “0x11” exists in the updated program map table PMT. Whether to present the encoded signal 3200 (elementary stream ES) corresponding to the set value of the component tag (component_tag) DMTG as it is “0x11” or to select the default component tag (component_tag) CMTG by.

  For this reason, when the component tag (component_tag) CMTG that has been selected / received disappears due to a program change or the like, the receiver performs a process similar to that at the time of channel selection to reselect from the new component tag (component_tag) CMTG. Will be performed.

  In addition, the principle that the component tag (component_tag) CMTG set numerical value continues to be decoded is kept even if the packet identification PID value having the component tag (component_tag) CMTG set numerical value is changed. When the set numerical value information of the packet identification PID defined in the map table PMT is changed, PID filtering control is performed at the receiver, so that the same phenomenon as the channel selection operation occurs on the display. That is, there is a high possibility that video and audio decoding is interrupted.

  Therefore, if continuous display at the receiver is desired, changing the setting value of the packet identification PID should be avoided as much as possible. Although the number of types of the encoded signal 3200 (elementary stream ES) constituting the program can be increased or decreased within the program, the default encoded signal 3200 (elementary stream ES) is not lost.

  As described above, in order to perform continuous display on the receiver 300, the set value of the component tag (component_tag) CMTG must not be changed. If the encoded signal 3200 (elementary stream ES) corresponding to the setting value of the component tag (component_tag) CMTG being decoded is lost from the program map table PMT, it is set by default. Switched to the encoded signal 3200 (elementary stream ES).

  In one program map table PMT, a plurality of video signals or audio signals corresponding to the same set value in the stream format identification STID of the encoded signal are defined, and further in an event information table EIT described later with reference to FIG. In the case where a plurality of component descriptors CMDR (audio component descriptors AUDR) are arranged, priority is given in ascending order of the set numerical values of the component tag (component_tag) CMTG.

  An example of setting value assignment in the parameter setting area of the component tag (component_tag) CMTG is shown in FIG. For example, numerical values of “0x00”, “0x10”, “0x30”, and “0x38” may be assigned to the default video stream, audio stream, or main stream of subtitles and superimpose characters, respectively.

  In addition, numerical value allocation ranges of “0x01 to 0x0F”, “0x11 to 0x2F”, “0x31 to 0x37”, and “0x39 to 0x3F” are set for video streams and audio streams that are not default / main, and subtitle / superimpose. Also good.

  Furthermore, the encoded signal 3200 (elementary stream ES) used in the partial reception layer such as one-segment broadcasting may be assigned as follows. That is, for example, each numerical value (range) of “0x81”, “0x82”, “0x83 or 0x85”, “0x84 or 0x86” is assigned to the default video / audio stream and the other video / audio streams, respectively. Good.

  In the system of the present embodiment, identification information corresponding to the encoded signal 3200 (elementary stream ES) having an attribute suitable for a viewer who is not free of vision or hearing is set. The broadcast station 100 or the service provider apparatus 120 side installs the identification information and transmits it as a broadcast signal or a communication signal. In addition, the receiver 140 side, based on the identification information installed in the broadcast signal or communication signal, has an encoded signal 3200 (elementary stream ES) having an attribute suitable for a viewer who is not visually or auditorily free. Is selected and extracted and displayed to the user (viewer).

  Not limited to this, identification information corresponding to a foreign language sub-speech signal is set, arranged in a broadcast signal or communication signal, transmitted / received, and a foreign language sub-speech signal is selected and extracted by the receiver 140 side. To the user (viewer).

  As a method for setting this identification information, an assigned numerical value (or assigned numerical value range) to an existing parameter setting area within a predetermined standard may be defined. As the parameter setting area, a predetermined area in the descriptor DCR that can be arranged in the program map table PMT may be used.

  As described with reference to FIG. 27, the retransmission period of the program association table PAT and the program map table PMT is as short as about 100 ms. In contrast, the retransmission cycle of the network information table NIT and the event information table EIT is as long as around 1 second (maximum 3 seconds).

  Therefore, if the identification information can be arranged in the descriptor DCR in the program map table PMT having a short retransmission cycle, the access time from the demultiplexer 304 to the identification information can be shortened. For example, when the identification information is arranged in the descriptor DCR in the program map table PMT, an attribute suitable for a viewer who is not visually or auditorily free immediately after the user (viewer) switches the channel selection. The encoded signal 3200 (elementary stream ES) can be displayed. Therefore, the service for the user (viewer) is improved.

  As a method for setting identification information corresponding to an encoded signal 3200 (elementary stream ES) having an attribute suitable for a viewer who is not free of visual or auditory sense in this embodiment, or identification information corresponding to a foreign language sub-audio signal, Redefinition may be performed by adding or sub-changing the assigned numerical value (range) to the parameter setting area of the existing arrangement.

  As an example, a component tag (component_tag) CMTG in the stream identification descriptor SIDC, which is a descriptor DCR that can be arranged in the program map table PMT, is used. However, the present invention is not limited to this, and any parameter setting area that can be arranged in a broadcast signal or communication signal may be used.

  In this embodiment, “explanatory audio” is assumed as an attribute of an audio signal suitable for a viewer who is not free to view. The commentary audio refers to a service that “explains” video content (changes) displayed to the viewer as appropriate.

  In addition, “special sound” is assumed as an attribute of a sound signal suitable for a viewer who is not free to hear. It is generally said that when you get older, it is difficult to hear high-frequency sounds. Therefore, for viewers having these auditory characteristics, “high-frequency sound is partially shifted to low-frequency sound with respect to sound information that can be frequency-converted”. The sound signal after this processing is called special sound.

  In addition, as an example of the encoded signal 3200 (elementary stream ES) having an attribute suitable for a viewer who is not free of hearing, a video signal including a sign language video, a subtitle stream in a predetermined language, a character supermarket, and the like are assumed. doing.

  However, the present invention is not limited thereto, and identification information corresponding to any encoded signal 3200 (elementary stream ES) suitable for a viewer who is not visually or auditorily free may be targeted.

  The list of allocation target contents 3115-1 described in FIG. 28C is transcribed in FIG. The assignment target content 3115-1 described in FIG. 29B may be regarded as a numerical value (range) already set in a predetermined standard.

  FIG. 29C shows setting of identification information corresponding to the encoded signal 3200 (elementary stream ES) having an attribute suitable for a viewer who is not free of visual or auditory sense or identification information corresponding to a sub-audio signal in a foreign language. An example method is shown.

  Assume that the existing range of the assigned value (tag value 3110-1) indicating the non-default video stream attribute is set to “0x01 to 0x0F” as shown in FIG. On the other hand, a predetermined value (range) within the allocation range may be allocated to the attribute of the video stream including the sign language video. In the embodiment shown in FIG. 29C, “0x0F” is assigned to the attribute of the video stream including the sign language video. However, the present invention is not limited to this, and an arbitrary numerical value (or range thereof) in “0x90 to 0xFF” assigned as the reserved area described in FIG. 29B may be newly set.

  Similarly, it is assumed that the existing numerical value assignment range corresponding to the attribute of the non-default audio stream in FIG. 29B is “0x11 to 0x2F”. On the other hand, the commentary audio stream in Japanese is “0x12” or “0x20”, the commentary audio stream in English is “0x13” or “0x21”, and the special audio stream in Japanese / English is “0x14” / Each may be assigned to “0x15”.

  In the above example, a predetermined numerical value is assigned to each audio signal corresponding to each attribute. However, the present invention is not limited to this, and a settable numerical range may be assigned instead of a fixed numerical value. Furthermore, an arbitrary numerical value (or a range thereof) within “0x90 to 0xFF” allocated as a reserved area may be newly set.

  Also, as shown in FIG. 29 (b), when “0x80 to 0x8F” has already been set for the encoded signal 3200 (elementary stream ES) used in the partial reception layer such as one seg, it is within that range. The predetermined value may be newly set.

  In the embodiment of FIG. 29 (c), the explanation voice for partial reception layer corresponding to English is defined as “0x84”, and the explanation voice for partial reception layer corresponding to Japanese is defined as “0x86”. Also, a sub-picture stream including sign language video used in the partial reception layer is defined as “0x82”.

  For example, with respect to the encoded signal 3200 (elementary stream ES) used in the partial reception layer, “0x84 to 0x86” can be directly referenced from other than the partial reception layer. Therefore, “the setting value of the component tag CMTG is defined as“ 0x84 ”or“ 0x86 ”for an encoded signal 3200 having an attribute suitable for a partial reception layer and a viewer who is not free of visual or auditory hearing other than the partial reception layer”. You may do it.

  As a specific method, for example, in the case of performing commentary audio for visually impaired persons other than the partial reception layer and the partial reception layer, the setting value of the (audio) component tag CMTG is set to “0x84” or “0x86” In this case, it is possible to preferentially select the audio for the visually impaired person in a normal television other than the partial reception layer (one segment) and the partial reception layer.

  As another application example, not only the parameter setting area related to the component tag CMTG arranged in the stream identification descriptor SIDC but also the parameter setting area related to the component tag CMTG arranged in another descriptor DCR is used. Also good.

  The parameter setting area relating to the component tag CMTG also exists in the descriptor DCR which has a retransmission cycle as long as about 1 second (maximum 3 seconds) but can be set in the event information table EIT. Although it may be set in any one of the descriptors DCR, setting the same setting value of the component tag CMTG in a plurality of different descriptors DCR produces an effect of improving detection accuracy.

  A data structure in the event information table EIT is shown in FIG. The table indicates information related to the program such as the program name, broadcast date and time, and description of the contents. Here, as numerical values to be set in the parameter setting area of the table identification TID, appropriate numerical values in “0x4E” or “0x4F”, “0x50 to 0x5F”, and “0x60 to 0x6F” (FIG. 26 (d)) are described. The

  Further, the service identification (service_id) SVID is made to coincide with the numerical value set at the corresponding location in FIG. The transport stream identification TSID is also matched with the numerical value set in the corresponding part of FIG. Thus, the numerical values are matched to establish the relationship between the contents specified in the network information table NIT and the program map table PMT and the corresponding event information table EIT.

In the event loop area EVLP in the event information table EIT,
The event identification EVID, the start time STM at which the event starts, the end time ETM at which the event ends, and an arbitrary number of descriptors DCR are combined to form event information EVIF.

  The maximum value of the event period from the start time to the end time of this event is 48 hours. The maximum number of events per day is 96 per service (corresponding to the same setting value of the service identification SVID). In this way, the event conditions are limited to ensure the processing simplicity of the receiver 300.

  As the descriptor DCR in which the value of the component tag CMTG can be set, there are a component descriptor CMDR and an audio component descriptor AUDR. In the component descriptor CMDR, information on the video component stream constituting the event is described.

  The data structure in this component descriptor CMDR is shown in FIG. A numerical value “0x50” is set in the parameter setting area of the descriptor tag DSTG corresponding to the component descriptor CMDR.

  In the 4-bit area from the 21st bit to the 24th bit, the component content CMCT is designated. Since this component descriptor CMDR describes information on the video component stream, the video component corresponds to this component descriptor CMDR. Therefore, “0x01” meaning video is described as the component content CMCT.

  The demultiplexer 304 in the receiver 300 regards it as valid (video) when the set numerical value of the corresponding part in the received broadcast signal is “0x01”, otherwise, the corresponding component descriptor CMDR is Judge as invalid.

  A component type (component_type) CMTY is designated in the 8-bit area from the 25th bit to the 32nd bit, and a numerical value indicating the video component type is described therein.

  In the 8-bit area from the 33rd bit to the 40th bit, the above-described component tag CMTG is arranged. In the demultiplexer 304 in the receiver 300 shown in FIG. 3, the component tag CMTG in the stream identification descriptor SIDC arranged in the program map table PMT with the setting value of the component tag CMTG that is unique in the program. It can be used corresponding to the set value.

  Further, a numerical value corresponding to the ISO_639 language code LGCD is set in the 24-bit area from the 41st bit to the 64th bit. Here, “0x6A706E” corresponding to Japanese may be set.

  A numerical value corresponding to the component description information CMTT (text_char) is entered in the parameter setting area from the last 65th bit to the 64 + 8Nth bit (N is “0” or a natural number). Here, when there are multiple video components, the video type name is described with 16 bytes (8 full-width characters) or less. Do not use a line feed code. This field can be omitted if the component description is the default string. The default string is “video”.

  The data structure in the audio component descriptor AUDR is shown in FIG. In the descriptor tag DSTG, “0xC4” is set.

  In the component content CMCT corresponding to the 4-bit area from the 21st bit to the 24th bit, a numerical value within the range of “0x2 to 0x4” can be set. In this embodiment, “0x2” indicating an audio component may be set. Further, in the demultiplexer 304 in the receiver 300, when “0x2” indicating an audio component is set in this parameter setting area, it is regarded as effective. On the other hand, when other numerical values are set, it is determined that the corresponding audio component descriptor AUDR is invalid.

  A component type ACTY (component_type) is arranged in an 8-bit area from the 25th bit to the 32nd bit. And here, the audio component type of the component is described.

  Furthermore, the above-described component tag CMTG is arranged in an 8-bit area from the 33rd bit to the 40th bit. In this parameter setting area, a component tag value that is unique within the program is described. Further, in the demultiplexer 304 in the receiver 300 shown in FIG. 3, the component tag CMTG in the stream identification descriptor SIDC arranged in the program map table PMT with the setting value of the component tag CMTG that is unique in the program. It can be used corresponding to the set value of.

  An ISO_639 language code LGCD (ISO_Language_code) is arranged in a 24-bit area from the 65th bit to the 88th bit. In this parameter setting area, the language name of the (first) audio component is described.

  The ISO_639 language code LGCD2 (ISO_Language_code2) is arranged in the 24-bit area from the 89th bit to the 112th bit. In the parameter setting area, the language name of the second audio component is described in the multilingual mode of the elementary stream ES.

  In the last component description information DMTT, the voice type name is described with 16 bytes or 8 characters or less. In the case of dual monaural with one elementary stream (audio signal), a line feed code of 1 byte is inserted between each audio type name, and is described with a total of 33 bytes (16 full-width characters) or less. In addition, the default character string may be set to “speech” for anything other than dual mono, and “first voice CR (line feed code) second voice” for dual mono.

  In this embodiment, identification information corresponding to an encoded signal (explanatory audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free is set. The broadcast station 100 side or the service provider device 120 side transmits this identification information in a broadcast signal or communication signal.

  In the demultiplexer 304 in the receiver 300, this identification information is used, and the encoded signal 3200 (elementary stream ES) having an attribute suitable for a viewer who is not visually or auditorily free from the received broadcast signal or communication signal. Is extracted and displayed to the user (viewer).

  A problem situation when the identification information does not exist will be described with reference to FIG. As described in the prior art, the prior art requires a process of “selecting the“ default ”elementary stream ES when the channel selection channel is switched”. Further, it is assumed that the commentary audio is broadcast with an audio signal other than the default audio signal.

  When the channel selection channel is switched after the visually impaired person first selects commentary audio, a default audio signal is output immediately after the channel switching. Therefore, every time the channel selection is switched, a switching process of the audio signal is necessary.

  For example, in the example shown in FIG. 31, it is assumed that a user interface that simply preferentially selects an audio signal other than the default is provided, and the user selects sub audio. When channel A is selected, the value of the component tag CMTG indicating the attribute of the sub audio signal corresponding to the English audio is set to “0x11”. In addition, the attribute of the comment audio is set to “0x12” as the value of the component tag CMTG.

  On the other hand, the value of the component tag CMTG indicating the sub audio signal having the description audio attribute in the channel B is given by “0x11”. When the user (viewer) first selects commentary audio while viewing channel B, the set value “0x11” of the component tag CMTG indicating the corresponding sub audio signal is recorded in the recording area in the demultiplexer 304. The

  Thereafter, when the user (viewer) switches to channel A, an audio signal corresponding to the set value “0x11” of the component tag CMTG is selected and output. In channel A of FIG. 31, since the audio signal corresponding to the set value “0x11” of the component tag CMTG is a sub audio signal corresponding to English audio, it is difficult to continue outputting the explanation audio.

  In addition, not only commentary speech but also English sub-speech is selected on channel A, inconvenience arises. Since the setting value “0x11” of the component tag CMTG in this case, this value is recorded in the recording area in the demultiplexer 304. Thereafter, when the user (viewer) switches to channel B, a commentary sound is output on channel B. As a result, an audio signal different from the audio signal intended by the viewer is output before and after channel selection channel switching.

  FIG. 32 is a diagram illustrating an operation procedure in the receiver when a set value for the component tag CNTG is used as identification information. In order to distinguish from other embodiments, an embodiment corresponding to the operation procedure of FIG. 32 is referred to as a “first embodiment”.

  In the description using FIG. 27 (e), the service identification (service_id) SVID for providing a service to the user (viewer) and the corresponding remote control button number (remote control key identification) RCID have a one-to-one correspondence. explained.

  Consider a case where a channel (service_id) to be selected is selected using the remote controller 352 in the receiver in the start step S3500 in FIG. The demultiplexer 304 (FIG. 3) in the receiver 300 first receives the program association table PAT (S3501). Then, it is determined whether or not the program map table PMT in which the corresponding service identification SVID (service ID) is defined in the broadcast signal is transmitted (S3503).

  As described above, the numerical value set in the parameter setting area of the service identification SVID is in the parameter setting area of the program number PRN (broadcast program number identification) arranged in the program association table PAT (and in the program map table PMT). Matches the numeric value set in. Accordingly, by checking the setting value in the parameter setting area of the program number PRN (broadcast program number identification) arranged in the program association table PAT, whether or not the program map table PMT in which the service identification SVID is defined is transmitted. Can be determined (S3503).

  If the program map table PMT in which the service identification SVID is defined is not transmitted, the network information table NIT (S3502) received in advance is used.

  Specifically, the broadcast tuner 301 is controlled to select a transport stream TS to which the service identification SVID (a predetermined set value thereof) is transmitted. As can be seen from FIGS. 27 (d) and (e), a numerical value is read by setting in the area of the service identification SVID (service ID) described in the TS information descriptor TSDR arranged in the network information table NIT. The situation (S3503) including the corresponding service ID may be directly confirmed.

  Next, the packet identification PID of the transport stream packet TSP in which the EMM (see individual information EMM411 in FIG. 4A) is stored is received from the conditional access table CAT (S3504) arranged in the selected transport stream TS.

  After that, a filter for receiving the CAS_ID EMM addressed to the receiver is set (S3512).

  Further, the program map table PMT corresponding to the service identification SVID (service ID) to be selected is received from the PAT (S3505), and the packet identification of the transport stream packet TSP in which the ECM (see the common information ECM410 in FIG. 4A) is stored. Detect PID.

  The ECM is received using the corresponding setting value of the packet identification PID, and an ECM reception command is issued to the CAS module (IC card). If the EMM already contracted to the CAS module (IC card) has been received, the scramble key Ks (scramble key (Ks) 401 in FIG. 4A) is received from the CAS module (IC card) as a response to the ECM reception command as a normal response. And set in the descrambler (S3508).

  Also, the corresponding video signal and audio signal are extracted using the packet identification PID in the transport stream packet TSP in which the video signal and audio signal of the selected channel described in the program map table PMT (S3505) are stored, and the video Transfer to the decoder 306 and the audio decoder 307 (FIG. 3).

  As described above, a compressed video / audio signal descrambled (S3509) is obtained by the scramble key (Ks) obtained from the CAS module (IC card) by ECM reception (S3508). Thereafter, the compressed signal is decoded in the video decoder 306 and the audio decoder 307 (S3510), and is output to the display 328 and the speaker 329.

  If the EMM is not received even though it is not contracted or contracted, a response indicating that the EMM has not been received such as a non-contract is returned as a response to the ECM reception command from the CAS module (IC card). Accordingly, the receiver 300 generates a predetermined error message such as “non-contract” on the display 328 and displays it on the monitor (S3516).

In digital terrestrial television broadcasting, the existing assignment of setting values to the component tag CMTG corresponding to the audio signal is “0x10-0x2F” except for the partial reception layer,
○ In the partial reception layer, "0x83 to 0x86" when directly referenced from the partial reception layer,
○ "0x84 to 0x86" when directly referenced from other than the partial reception layer in the partial reception layer
And are defined in advance.

In addition, the existing assignment of setting values to the component tag CMTG of the audio signal in BS (Broadcasting Satellites) digital television broadcasting is “0x10-0x2F” except for the partial reception layer,
○ The default audio signal is pre-defined as “0x10” for both the terrestrial digital broadcasting partial reception layer and BS digital broadcasting.

For example, the following values are newly assigned as broadcast standards to the set values of the audio signal component tag CMTG in the present embodiment as fixed values.
“0x20” ⇒ Explanation audio (Japanese)
“0x21” ⇒ Explanation audio (English)
“0x11” ⇒ Multilingual audio (English)
"0x84" ⇒ Explanation audio (AAC 24kHz)
"0x86" ⇒ Explanation audio (AAC 48kHz)
Further, when the value of the component tag CMTG is set to “0x84 to 0x86” among the audio signals of the partial reception layer, direct reference is possible from other than the partial reception layer. Therefore, for example, in the case of performing explanation audio for visually impaired persons other than the partial reception layer and the partial reception layer, the setting value of the component tag CMTG may be defined as “0x84” or “0x86”. In this case, it is possible to preferentially select the commentary audio for the visually impaired person even in a normal television other than the partial reception layer (one segment) and the partial reception layer.

  Further, when a sub-audio signal such as commentary sound (Japanese), commentary sound (English), multilingual sound (English) is sent, the receiver in the present embodiment is selected with priority over the default sound. As a means for executing the user interface, the setting value of the component tag CMTG corresponding to the selected sub audio signal is stored in a non-volatile memory area installed in the demultiplexer 304 in the receiver 300.

  In the processing procedure shown in FIG. 32, the presence / absence of an audio signal having the same setting value as the setting value of the component tag CMTG stored in the nonvolatile memory area is determined (S3506).

  Specifically, the set value for the component tag CMTG described in the stream identification descriptor SIDC (FIG. 28A) arranged in the received program map table PMT (S3505) and the non-volatile memory area are stored. Compare the values.

  Alternatively, the set value for the component tag CMTG described in the audio component descriptor AUDR arranged in the event information table EIT is compared with the value stored in the nonvolatile memory area. In step S3506 of FIG. 32, either one of the above may be performed. However, if both are compared together, the determination accuracy can be improved.

As a result, if there is no corresponding audio signal in the audio signal included in the broadcast signal (No in S3506), a default audio signal (audio elementary stream ES) is selected (S3513).
On the other hand, when there is a corresponding audio signal in the audio signal included in the broadcast signal (Yes in S3506), the audio signal (audio signal) corresponding to the set value of the component tag CMTG stored in the non-volatile memory area. [Mentary Stream ES] is selected (S3507).

  The MPEG decoding (S3510) is continued until the viewing using the corresponding audio signal of the user (viewer) ends (S3515).

  The setting value assignment in the component tag CMTG is not limited to the above example, and may be assigned as a fixed value within a range of tag values that can be assigned to the audio signal (audio elementary stream ES).

  In the embodiment described above, identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free is provided. In the control signal 3100.

  In another embodiment different from the above, the identification information is arranged in the encoded signal 3200 (in the transport stream packet TSP that transmits the encoded signal 3200).

  A broadcast signal is transmitted in the form of a sequence of a plurality of continuous transport stream packets TSP. This single transport stream packet TSP is composed of a transport stream packet header TSHD and a payload PYLD as shown in FIG. The various tables described above and the actual status of the encoded signal 3200 are inserted into the payload PYLD.

  Note that the lower part of FIG. 33A indicates the position where various pieces of information are arranged by “bit number”. When transmitted from the broadcasting station 100 to the receiver 140, the transmission is performed in ascending order of bit numbers. One transport stream packet TSP is composed of 188 bytes (188 × 8 bits).

  A synchronization byte SYC is arranged at the first 8-bit position in the transport stream packet header TSHD. The setting value arranged in this parameter setting area is “0x47”.

  Scramble control TSC parameter setting areas are arranged at the 25th and 26th bit positions. If the data in the payload PYLD is not scrambled, this setting value is “00”. In this embodiment, as described in the first half, the encoded signal 3200 is scrambled using the common information ECM 410 and the individual information EMM 411 (FIG. 4A). Therefore, there are few cases where the set value of “00” is in the scramble control TSC area.

  On the other hand, when an even key is used, a value of “10” is set in the area of the scramble control TSC, and when an odd key is used, a value of “11” is set.

  A numerical value up to “1111” is entered in the continuity index CCNT arranged at the 29th to 32nd bit positions.

  In a parameter setting area composed of 13 bits from the 12th bit to the 24th bit, information (setting value) regarding the packet identification PID is arranged. In this packet identification PID, the set value changes in accordance with the type of signal entering the payload PYLD and the information content / signal content 3050.

  FIG. 33B shows a list of setting values defined conventionally. The set value of the packet identification PID related to the program map table PMT is specified in the program association table PAT.

  Also, the packet identification PID setting value of the transport stream packet TSP to which the encoded video signal, the encoded audio signal, the application information table AIT, and the viewing right control message ECM is transmitted is specified in the program map table PMT. .

  Identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free is included in the encoded signal 3200 (encoded signal). In another embodiment shown as a method of arranging in the transport stream packet TSP for transmitting 3200, the set value of the packet identification PID may be used.

  That is, the setting value or setting value range of the packet identification PID is newly defined. The broadcasting station 100 arranges a setting value that complies with the new regulations in the parameter setting area of the packet identification PID. The receiver 300 (demultiplexer 304 in the receiver 300) decodes a set value in the packet identification PID, and encodes a signal (explanatory audio signal or special audio signal, Discriminating information corresponding to video signals with sign language, subtitle signals, etc.).

  As shown in FIG. 33B, the set value range corresponding to the area 3400 that can be specified / operated for each conventional broadcaster is defined as the range of “0x0030 to 0x1FC7” and “0x1FD0 to 0x1FFE”. . Therefore, in other embodiments, a predetermined numerical value within the above range or an encoded signal having an attribute suitable for a viewer who is not free of vision or hearing (a commentary audio signal, a special audio signal, a video signal with sign language, Assigned to a subtitle signal).

  There is a high possibility that a conventional broadcaster (broadcast station 100) is already using an area having a small value in the set value ranges of “0x0030 to 0x1FC7” and “0x1FD0 to 0x1FFE”. Therefore, by newly defining “within a large range of setting values” that is currently unusable by the broadcaster (broadcast station 100), it is possible to deal with a situation in which a large change in equipment by the broadcaster (broadcast station 100) is unnecessary. Easy effect is born. As an example, a part of the set value range of “0x1FD0 to 0x1FFE” is an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal) having attributes suitable for a viewer who is not visually or auditorily free. Etc.) or identification information corresponding to foreign language speech.

  A specific example of the embodiment shown in the other is shown in FIG. That is, the range of “0x1FD0 to 0x1FEE” is used for the allocation area 3450 corresponding to a predetermined audio / video / subtitle, and the range of “0x1FF0 to 0x1FFE” is used for the subaudio allocation area 3480 corresponding to a foreign language. .

  As the above-mentioned allocation area 3450 corresponding to the predetermined audio / video / subtitle, the allocation area 3452 of the explanation audio signal for the visually impaired person and the person who cannot hear the audio signal (for example, elderly people have difficulty in hearing the high frequency side audio) Special audio signal allocation area 3454 (for example, shifting only the high frequency side component in the audio signal to the low frequency side), subtitle-added video signal allocation area 3458, and sign language video for people who cannot hear the audio signal. Identification information (setting values) regarding the video signal allocation area 3456, various language-capable caption allocation areas 3460, and the like may be set.

  Further, as the sub voice allocation area 3480 corresponding to the foreign language, the English corresponding sub voice allocation area 3482, the Chinese corresponding sub voice allocation area 3484, the Korean corresponding sub voice allocation area 3486, the Russian corresponding sub voice allocation area 34888, and the like. Identification information (setting value) may be set.

An example of numerical value assignment as the identification information (setting value) is shown in FIG. In contrast to the conventional PID value setting range area that can be specified / operated for each broadcaster, in the embodiment described here, the range area that can be used by the broadcaster is [0x0030 to 0x1FC7]. Adapt and
In [Embodiment 2], only a part of “0x0030 to 0x1FC7” is applied (the remaining part may include “0x1FD0 to 0x1FFE”),
[Embodiment 3] applies only within the range of “0x1FD0 to 0x1FFE”.

  In addition to disposing identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free in the encoded signal 3200 As a method of this, the packetized elementary stream header PESHD may be arranged.

  The data structure in the encoded signal 3200 is shown in FIG. An elementary stream packet enters the payload PYLD in the transport stream packet TSP (FIG. 35A). At the beginning of this, a packetized elementary stream header PESHD is arranged (FIG. 35 (b)).

  The structure in the packetized elementary stream header PESHD is shown in FIG. The upper part in FIG. 35 (c) represents a bit number for arranging each parameter setting area.

  The presentation time stamp PTS is used for synchronous display between a video signal, an audio signal, a caption signal, and the like. The decoder time stamp DTS is used for setting the decoding timing in the video decoder 306, audio decoder 307, and subtitle decoder 308 (FIG. 3) in the receiver 300.

  A numerical value of “0x000001” is set in the 24-bit packet start code PSCD arranged at the head in the packetized elementary stream header PESHD. This value means that “0” continues in 23 bits in binary display. Therefore, the position of the packet start code PSCD can be confirmed by detecting the place where 23 bits “0” continues.

  The demultiplexer 304 in the receiver 300 of FIG. 3 can detect the break of the transport stream packet TSP from the position of the synchronization byte SYC described above. Furthermore, the encoded video signal VDO and the encoded audio signal AUD can be extracted with higher accuracy by confirming the position of the packet start code PSCD.

  In the packetized elementary stream header PESHD, identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having attributes suitable for viewers who are not visually or auditorily free. As a method of arranging the stream identification STID, setting value allocation to the parameter setting area of the stream identification STID may be used.

  A specific example is shown in FIG. A range of “0x00 to 0x0F” may be assigned to the comment audio signal assignment area 3552 for the visually impaired, and a corresponding language may be assigned with the lower 4 bits.

  Alternatively, a range of “0x10 to 0x1F” may be assigned to the special voice signal assignment area 3554 for people who are difficult to hear a voice signal, and a corresponding language may be assigned by the lower 4 bits.

  Furthermore, a range of “0x20 to 0x2E” may be allocated to the allocation area 3558 of the video signal with caption, and a corresponding language may be allocated with the lower 4 bits. The assigned value of the sign language video signal may be set to “0x2F”.

At present, it is difficult for all programs to correspond to encoded signals (explanatory audio signals, special audio signals, video signals with sign language, subtitle signals, etc.) having attributes suitable for viewers who are not visually or auditorily free. Therefore, a means for notifying the user (viewer) in advance of a program corresponding to an encoded signal having an attribute suitable for a viewer who is not free of sight or hearing is required.

  As a specific implementation method, the system according to the present embodiment provides identification information regarding an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free. It may be set in a program guide or EPG (Electronic Program Guide).

  Examples of identification information described on the program guide and EPG are shown in FIG. A special character corresponding to “90” as the division number 3002 and “60” as the point number 3004 is set as the identification information corresponding to the voice explanation as the symbol meaning 3006.

  Similarly, special characters corresponding to the classification number 3002 “90” and the dot number 3004 “54” are set in the identification information corresponding to the caption broadcasting. As identification information corresponding to the sign language interpretation broadcast, a special character corresponding to the division number 3002 of “90” and the dot number 3004 of “53” is set.

  As the identification information, the special characters shown in FIG. 36 are described on the program guide or EPG. Accordingly, a user (viewer) can easily select programs corresponding to various services.

  In addition, the special character shown in FIG. 36 may be displayed on the screen of the display 328 (FIG. 3) in the receiver 300 when the user (viewer) selects a program.

  36 may be performed during the processing of FIG. 37 (for example, the timing of S3604) or FIG. 39 (for example, the timing of S3604).

  When displayed on the screen in this way, not only the convenience of user (viewer) program selection is improved, but also there is an effect that the program selection of the user (viewer) can be reliably performed.

  FIG. 37 shows an example of applying a program guide or EPG on which the special characters are posted. The special characters are searched from the program guide and EPG at the stage of starting viewing (S3600) of the user (viewer).

  Then, using the program guide or EPG, the user can display “explanatory audio” or “special audio”, “sub-picture of sign language display”, “video including sign language”, “Japanese subtitles”, or “subtitle display of a predetermined foreign language” The program corresponding to "" is selected by the remote controller 352 (S3601).

  Then, the demultiplexer 304 (FIG. 3) in the receiver 300 stores the video / audio / caption selected by the user (S3602). Specifically, the setting values in the component tag (Component_tag) CMTG, the packet identification PID, and the stream identification STID described so far are stored in the internal memory area.

  Next, consider a case where the user (viewer) desires to switch the selected channel from the currently selected channel to another channel. The user (viewer) searches the program guide or EPG for a channel (button number on the remote control) on which a program corresponding to a visually impaired person or a program corresponding to a foreigner in Japan is broadcast (S3603). . Then, based on the search result, the user's channel selection channel switching (S3604) is performed.

  Then, the receiver 300 (internal demultiplexer 304) creates a “frequency, network ID (network identification NETID in FIG. 27 (d)), remote control assigned number (remote control key in FIG. 27 (e)) created by performing channel scan in advance. The frequency and the network ID (network identification NETID in FIG. 27D) are extracted from the “list of identification information RCID (corresponding to the recommended remote control number)”. Tuner switching and network information table NIT acquisition are performed (S3605).

  In digital terrestrial broadcasting, the service identification (service_id) is uniquely assigned nationwide, but the remote control key identification information RCID (recommended remote control number) in the TS information descriptor TSDR is unique within the broadcasting prefecture, but between adjacent prefectures. In, duplicate values are assigned. For example, in the Kanto region, the same value “1” is assigned to the remote key identification information RCID (recommended remote control number) of the NHK general in the Kanto wide area and the NHK general in the Gunma prefecture.

  Therefore, the receiver 300 scans the physical frequency of the UHF band in which the terrestrial digital broadcast is broadcast in advance, identifies the digital terrestrial broadcast from the network identification assigned to the terrestrial digital broadcast, and can be received at the reception point. A list based on “frequency, network identification, remote control key identification information RCID (recommended remote control number) created from a digital terrestrial broadcast wave is created.

  At this time, the remote control key identification information RCID (recommended remote control number) duplicated from the receivable list when received is received from the prefectural area (prefecture, etc.) of the receiving place set in advance by the user interface such as initial setting. The broadcast station at the receiving location is assigned with priority to the remote control key identification.

  In the example of the previous NHK synthesis, if the receiving place is Gunma prefecture, the NHK synthesis in the Gunma prefecture area is selected instead of the Kanto wide area. Also, the frequency is the same broadcast wave from Skytree and other satellite stations even in the same Kanto wide area, but the frequency is converted and broadcasted. In a television receiver, the same broadcast station has a reception sensitivity (C / N). The reception channel list is generated in preference to the higher one.

  Then, the receiver 300 (internal control unit 330) extracts the frequency and network identification corresponding to the remote control key identification information RCID selected by the user from the above-described reception channel list generated by frequency scanning, and the broadcast tuner 301. Is operated, the network information table NIT is acquired by the demultiplexer 304, and a matching transport stream identification TSID is extracted.

  Then, using the “information such as video / audio / caption immediately before channel selection channel switching” stored in the demultiplexer 304, the setting value of the corresponding packet identification information PID or the setting value of the component tag CMTG, the setting of the stream identification STID A value is determined (S3606). Next, a predetermined encoded signal (elementary stream) is extracted from the set value of the corresponding packet identification information PID (S3607).

The second embodiment will be described below with reference to FIG. The basic receiver configuration is as described in FIG. The difference from the first embodiment described above lies in the difference in the sub audio specifying means. In the first embodiment described above, the setting value of the component tag CMTG corresponding to the voice signal is defined in advance in association with a specific voice service. In the second embodiment described here, the setting value of the packet identification PID of the transport stream packet TSP to which a specific audio signal is transmitted is defined by a specific value. For example, “0x0310” corresponds to the commentary audio signal (Japanese)
“0x0311” is associated with the explanation audio signal (English), and “0x0321” is associated with the multilingual audio signal (English).
Allocate in this way. Further, the receiver 300 is provided with a user interface that preferentially selects any one of the explanation audio signal (Japanese), the explanation audio signal (English), and the multilingual audio signal (English) when the sub-audio is sent. . After the selection, the set value of the packet identification PID corresponding to the sub audio signal is stored in the non-volatile memory area of the receiver 300 (internal demultiplexer 304).

  In the operation flow shown in FIG. 38 corresponding to the receiver configuration, it is determined whether or not the sub-audio signal (elementary stream ES) corresponding to the set value of the selected packet identification PID is included in the selected channel ( S3706). When the desired sub audio signal (elementary stream ES) is included in the selected channel (when the result of S3706 is Yes), the sub audio signal (elementary stream ES) is reproduced (S3507).

  On the other hand, when the desired sub audio signal (elementary stream ES) is not included in the selected channel (when the result of S3706 is No), the default audio signal (elementary stream ES) is reproduced (S3513). Is possible.

  As in the first embodiment, a channel (service identification (service_id) SVID) to be selected by the remote controller is selected (S3503).

  The program map table PMT corresponding to the service identification (service_id) SVID to be selected is received from the received program association table PAT (S3501) (S3505), and the corresponding video signal or audio signal (elementary stream) in the selected channel is received. In the middle of the process of selecting ES) (S3507), a determination process (S3706) for the set value of the packet identification PID is entered.

  In this determination processing, when the setting value of the packet identification PID corresponding to the audio signal (elementary stream ES) preferentially selected is arranged in the program map table PMT (the determination result in S3706 is Yes) Selects a packet identification PID corresponding to the corresponding audio signal (elementary stream ES) (S3507).

  On the other hand, when the set value of the packet identification PID corresponding to the audio signal (elementary stream ES) to be selected in the program map table PMT is not arranged (the determination result in S3706 is No), the default audio signal ( The transport stream packet TSP having the set value of the packet identification PID corresponding to the elementary stream ES) is extracted (S3513), and the data in the payload PYLD is transferred to the descrambler 302 of FIG.

  After obtaining the compressed video / audio signal descrambled (S3509) using the scramble key (Ks) obtained from the CAS module by ECM reception as described above, the compressed signal is decoded in the video decoder 306 and the audio decoder 307. To do. The decoded raw signal is output to the display 328 and the speaker 329.

  The set value of the packet identification PID is not limited to the above example, and may be assigned as a fixed value within a range that can be assigned to the audio signal (elementary stream ES).

  In the control signal 3100 as a setting location of identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free. The setting method and the setting method for the encoded signal 3200 have been described.

  In the system of the present embodiment, the identification information may be set in both the control signal 3100 and the encoded signal 3200. If both are set, the detection accuracy and extraction accuracy of the encoded signal are improved.

  FIG. 39 shows an example of processing performed by the receiver 300 (internal demultiplexer 304) when the identification information is set in both the control signal 3100 and the encoded signal 3200.

  The user (viewer) selects “explanatory audio” or “special audio”, “sub-picture of sign language display”, “video including sign language”, “Japanese subtitles”, or “subtitle display of a predetermined foreign language” (S3601). In this case, the setting value in the parameter setting area such as the component tag CMTG or the packet identification PID, the stream identification STID corresponding to the video / audio / caption selected by the user is stored in the demultiplexer 304 (S3602).

  When the user (viewer) wants to change the channel selection, the program (identical information (special characters) shown in FIG. 36 in the program guide or EPG is described (a program corresponding to a person who is not visually or hearing-free or a foreign country). The program corresponding to the word) and the corresponding channel selection channel are searched (S3603). Then, based on the search result, the user's channel selection channel switching (S3604) is performed.

  Then, the receiver 300 (internal control unit 330) extracts the frequency and network identification corresponding to the remote control key identification information RCID selected by the user from the above-described reception channel list generated by frequency scanning, and the broadcast tuner. The physical condition (frequency, etc.) received by 301 is operated, the network information table NIT is acquired by the demultiplexer 304, and the matching transport stream identification TSID is extracted (S3805).

  Next, the packet identification PID of the program map table PMT corresponding to the corresponding program number PRN is extracted from the program association table PAT (S3806).

  Thereafter, the set value of the corresponding component tag CMTG is searched from the descriptor in the program map table PMT, and the value of the packet identification information PID (packet identification information EPID of the encoded signal) corresponding to the set value is searched (S3807).

  Then, a predetermined encoded signal (elementary stream ES) is extracted from the packet identification information PID (encoded signal packet identification information EPID) value (S3808).

  Thereafter, descrambling (S3509), MPEG decoding (S3510), and display (S3608) to the user (viewer) are performed on the extracted predetermined encoded signal (elementary stream ES).

  As described in FIG. 30C, the component type ACTY (component_type) is arranged in the audio component descriptor AUDR. FIG. 40 shows existing numerical value assignments set in the parameter setting area.

  In this definition, for example, even if both foreign language voices for foreign residents in Japan, or both Japanese and English commentary voices for visually impaired persons are serviced, it is not possible to distinguish between them.

Therefore, in the third embodiment, the setting values of the component tag CNTG arranged in the audio component descriptor AUDR are newly assigned as follows. In other words, “0x20” is assigned to the Japanese sub audio signal,
“0x21” is assigned to the English sub audio signal.

  For example, in the above-described audio component descriptor AUDR, the receiver 300 grasps the contents of the serviced sub-audio signal by the combination of the component type ACTY (component_type) and the set value of the component tag CNTG defined as the fixed operation. It becomes possible. A specific example is shown in FIG. Further, FIG. 42 shows existing setting values assigned to the component type ACTY (component_type).

  In the example shown in FIG. 41, the receiver 300 can grasp the attribute of the secondary audio signal (elementary stream ES) according to the following rules. First, the example (1) in FIG. 41 will be described.

  In the component type ACTY (component_type) of the audio component descriptor AUDR, b6-b5 is “01”, indicating the attribute of the commentary audio signal for the visually impaired. The next b4-b0 represents the 2/0 mode (stereo) of “0011”.

  Further, it indicates a Japanese sub audio signal whose set value of the component tag CNTG is “0x20”. Therefore, it can be seen that the example of (1) is “a sub audio signal in Japanese for the visually impaired”.

  The difference between Example (4) and Example (4) means that the set value of the component tag CNTG is “0x21”, which means an English sub audio signal. As a result of the combination with the component type ACTY (component_type), it can be understood that the example (4) is “English sub audio signal (stereo) for the visually impaired”. The same applies to the other cases in the above table.

  Although not illustrated in the table, in the example (1), when the setting value of the component type ACTY (component_type) is “00100111 (0x27)”, b4-b0 is “00111”. Therefore, it becomes Japanese sub-audio (3/1 mode) for the visually impaired.

  In the example (5) of FIG. 41, the value of b6-b5 is “00”. On the other hand, the existing technology (existing standard) is also operated so that the value of b6-b5 is substantially set to “00”. As a result, the meaning set in the example (5) of FIG. 41 is the same as that of the first embodiment already described.

  As described above, when the value of b6-b5 is fixedly operated in the component type ACTY (component_type), the first embodiment that is defined only by the set value of the component tag CNTG is effective.

  FIG. 43 shows an example of a processing procedure performed by the receiver 300 (internal demultiplexer 304) based on the third embodiment. As in the first embodiment, when the channel (service_id) to be selected is selected by the remote controller, the program association table PAT is received (S3501). Then, the video signal and audio signal of the channel selection channel described in the program map table PMT corresponding to the service_id to be selected are selected (S3507).

  In the middle of the series of processing procedures, the presence / absence determination of the audio signal defined by the set value of the set component type ACTY (component_type) and the set value of the component tag CNTG is performed (S3906).

  The setting value in the parameter setting area of the component type ACTY (compoment_type) and the component tag CNTG in the audio component descriptor AUDR arranged in the event information table EIT is stored in advance in the receiver 300 (in the demultiplexer 304). To do.

  In the presence / absence determination in S3906, it is determined whether or not the audio signal (elementary stream ES) having the setting value stored above is arranged in the program map table PMT. Here, the retransmission period of the event information table EIT is longer than that of the program map table PMT. Therefore, the event information table EIT may be cached in advance in the memory in the control unit 321 when the broadcast is not being viewed. In addition, if the receiver 800 is equipped with a plurality of tuner units (801-1, 801-2) as shown in FIG. 8, the event information table EIT is stored by the tuner unit that is not viewing the broadcast. It may be extracted by the demultiplexer 304 (FIG. 3) to correspond to the length of the retransmission cycle.

  The desired audio signal (elementary stream ES) is determined based on the component type ACTY (compoment_type) in the audio component descriptor AUDR arranged in the event information table EIT cached in advance and the setting value in the parameter setting area of the component tag CNTG. ) Is arranged in the program map table PMT (when the determination result in S3906 is Yes), the set audio is used by using the packet identification PID corresponding to the audio signal (elementary stream ES). A signal (elementary stream ES) is selected (S3507).

  On the other hand, when it is not arranged in the program map table PMT (when the determination result in S3906 is No), a default audio signal (elementary stream ES) is selected (S3513).

  As described above, after obtaining the descrambled compressed video / audio signal with the scramble key (Ks) obtained from the CAS module by ECM reception, the compressed video signal is decoded by the video / audio decoding unit (S3510), And output to speakers.

  The packet identification PID to which the desired audio signal (elementary stream ES) corresponds is not limited to the above example, and is a fixed value within the set value range of the packet identification PID that can be assigned to the audio signal (elementary stream ES). Can be assigned as

  In the third embodiment, identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free. The operation of assigning a fixed value to the set value of the component tag CNTG is performed.

  On the other hand, in the fourth embodiment, identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free. Then, a fixed operation is performed in which a fixed value is assigned to the set value of the packet identification PID.

  Further, in this example, the attribute of the sub audio signal can be grasped by the combination with the set value of the component type ACTY (component_type) of the audio component descriptor AUDR.

For example, the setting value in the parameter setting area of the packet identification PID corresponding to the audio signal is fixedly operated as follows (fixed value is assigned). That is, “0x0310” is assigned to the Japanese sub audio signal. Also, “0x0311” is assigned to the English sub audio signal.

  Similar to the third embodiment, the attribute of the sub audio signal can be grasped from the combination of the set value of the component type ACTY (component_type) in the audio component descriptor AUDR and the set value for the packet identification PID.

  FIG. 44 shows a combination setting example in the fourth embodiment. In FIG. 44, the setting value “0x20” for the component tag CMTG in FIG. 41 is replaced with the setting value “0x0310” for the packet identification PID. Also, the setting value “0x21” for the component tag CMTG in FIG. 41 is replaced with the setting value “0x0311” for the packet identification PID.

  In the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment, which of the component tag CMTG and the packet identification PID is to be used as a fixed operation depends on the equipment modification of the broadcasting station 100. What is necessary is just to select by the method easy to do.

  In addition, as identification information corresponding to an encoded signal (explanatory audio signal, special audio signal, video signal with sign language, subtitle signal, etc.) having an attribute suitable for a viewer who is not visually or auditorily free, any parameter setting area Whether to assign the set value range may be determined flexibly in consideration of the facility repair viewpoint, switching of the channel selection channel, convenience of recording reservation, and the like as described above.

  As a specific setting method of the identification information, it may be specified by an assignment condition of a setting value to the component tag CMTG or a setting value of the packet identification PID as in the first embodiment or the second embodiment. Further, a combination of a plurality of different parameter setting areas may be used as in the third embodiment or the fourth embodiment.

  In addition, as a parameter setting area used for setting the identification information, stream identification STID (FIG. 35C) and component content CMCT (FIGS. 30A and 30C) may be used. In addition, the assignment of setting values to the parameter setting area in an arbitrary descriptor DCR may be used as a parameter setting area used for setting the identification information.

  As described with reference to FIG. 30, the component type ACTY (component_type) and the component tag CMTG are arranged in the event information table EIT, and the audio component descriptor AUDR and the component descriptor CMDR are arranged.

  Therefore, by using these pieces of identification information, it is possible to confirm whether or not the voice service is being implemented from the program guide or EPG. Further, if this identification information is displayed on the screen (for example, in the form of special characters in FIG. 36), it can be used as effective information at the time of recording reservation.

  FIG. 30 (c) has already shown the outline of the data structure in the audio component descriptor AUDR. FIG. 45 shows a more detailed data structure, and FIG. 46 shows specific contents for each parameter setting area. “Text_char” in FIGS. 45 and 46 corresponds to the component description information CMTT in FIG. 30C, and an arbitrary character string can be set in this parameter setting area.

  In the fifth embodiment, a fixed character string of 16 bytes or less (or 8 full-width characters or less) is set as the voice component voice type name in the parameter setting area.

An example in which the audio signal (elementary stream ES) is made to correspond when such a fixed character string is used will be described. For example, “explanation audio Japanese”, “explanation audio English”, and “foreign audio English” are described in this parameter setting area.
In the case of dual mono, “commentary voice CR Japanese English” and “foreign voice CR English” are described.

  In this way, the receiver 300 can easily grasp the attribute of the corresponding audio signal. The receiver 300 is provided with a user interface for setting a sub audio signal to be preferentially selected.

  If “a packet identification PID corresponding to the audio signal to be preferentially selected” is arranged in the program map table PMT, the audio signal is selected.

  On the other hand, if “the packet identification PID corresponding to the audio signal to be preferentially selected” is not arranged in the program map table PMT, the default audio signal is extracted.

  Then, after obtaining a descrambled compressed video / audio signal using the scramble key (Ks) obtained from the CAS module by ECM reception, the video / audio decoding unit decodes the compressed signal and outputs it to a monitor or speaker.

  When the fifth embodiment described above is used, the text_char can be arbitrarily defined. Therefore, there is an effect that it is not necessary to modify the transmission facility and the response can be facilitated. This is because even in the current standard, any character string description is permitted in the component description information CMTT (“text_char”).

  Here, in order to realize the fifth embodiment, only the operation of the name of the audio signal (elementary stream ES) at the time of operating the sub audio signal has to be ruled.

  In the sixth embodiment, the set value of the component type ACTY (component_type) in the audio component descriptor AUDR and the character string inserted into the component description information CMTT are operated according to a fixed rule. These attributes represent the attributes of the sub audio signal. For example, a rule that describes “Japanese sub-speech”, “English sub-speech”, “foreign speech CR English”, etc. is defined in the character string. In this way, the receiver 300 can grasp the attributes of the serviced secondary audio signal.

  In the example shown in FIG. 47, the component tag CMTG set to “0x20” in the third embodiment is replaced with “Japanese sub-speech”. The component tag CMTG set to “0x21” may be read as “English sub-speech”. Also, when operating in Japanese / English with dual voice, the same effect can be obtained by selecting “foreign voice CR English”.

  In the seventh embodiment, the combination of the component type ACTY (component_type) and the ISO_639 language code LGCD (ISO_639_language_code) in the audio component descriptor AUDR is operated according to a fixed rule. A specific example is shown in FIG. By combining with the ISO_639 language code LGCD (ISO_639_language_code) in the audio component descriptor AUDR (component_type), the receiver 300 can easily grasp the attributes of the served sub audio signal.

  In the eighth embodiment, a combination of the component tag CMTG and the ISO_639 language code LGCD (ISO_639_language_code) in the audio component descriptor AUDR is operated according to a fixed rule. A specific example is shown in FIG. The receiver 300 can understand the attributes of the sub-speech with these combinations.

  The component tag CMTG (component_tag) of the above embodiment is an example of assignment, and a numerical value within the range of “0x11 to 0x2F” that can be assigned other than the default audio signal (elementary stream ES) may be set.

In the ninth embodiment, a specific character code arranged in “event_name_char” to “text_char” in the short format event descriptor arranged in the event information table EIT corresponding to the selected program, and this specific character code For example, in the case where “event_name_char” to “text_char” in the short format event descriptor includes [solution] of the program symbol, in combination with the component tag CMT corresponding to the selected audio signal.
When the setting value of the component tag CMT is “0x20”, it indicates Japanese sub-audio for the visually impaired,
In case of “0x21”, English sub audio signal for visually impaired people,
In case of “0x22”, Japanese sub audio signal for hearing impaired people,
In the case of “0x23”, an English sub audio signal for a hearing impaired person may be associated with each other.

  On the other hand, when “event_name_char” or “text_char” in the short format event descriptor does not include the [solution] of the program symbol, even if the setting value of the component tag CMT is within the range of “0x20 to 0x23” It is stipulated that it is not an audio signal for users. In this way, the receiver 300 can grasp the attribute of the serviced secondary audio signal.

  The setting value of the component tag CMT is not limited to the above, and an arbitrary setting value within the range of “0x11 to 0x2F” that can be assigned other than the default audio signal may be specified.

  Further, it may be combined with the eighth embodiment. That is, when there is a [solution] of a program symbol in “event_name_char” to “text_char” in the short format event descriptor, it is recognized as the eighth embodiment.

  On the other hand, when there is no [solution] of the program symbol in “event_name_char” or “text_char” in the short format event descriptor, it may be specified that it is not a commentary audio signal for the visually impaired person.

  In addition, the symbol placed in “event_name_char” or “text_char” in this short format event descriptor is not limited to [Solution], and any symbol can be specified as long as it can be used uniformly by all broadcasting stations according to the standard ( Regulation).

  The tenth embodiment will be described below. Since this proposal is mainly aimed at improving the convenience of broadcasting for audio-visually impaired people and multilingual broadcasting for foreigners in Japan, it is effective for basic broadcasting with many receiving targets such as terrestrial digital broadcasting. On the other hand, terrestrial digital broadcasting has about 200 broadcast station master facilities. Therefore, there is a possibility that it is not necessarily one rule. The following shows an example in which a plurality of the above-described embodiments are defined in such a situation, and the priority order of the contents is set.

  In the eleventh and twelfth embodiments, specific values of the component tag CMTG (component_tag) or the packet identification PID are given meaning. For example, a rule for giving a specific meaning to the component tag CMTG (component_tag) according to the eleventh embodiment is introduced. The rules b6-b5 of the component type ACTY (component_type) arranged in the audio component descriptor AUDR in the event information table EIT are ruled as having a low priority order.

If the set value of the component tag CMTG (component_tag) of the audio component descriptor AUDR is “0x20” in the embodiment 11, the component type ACTY (component_type) arranged in the audio component descriptor AUDR in the event information table EIT is assumed. Even if b6-b5 is "00", it can be regarded as commentary speech (Japanese).
It is possible.

  Further, although not a desirable example, a rule for giving a specific meaning to the set value of the packet identification PID in the twelfth embodiment may be introduced. Then, b6-b5 of the component type ACTY (component_type) arranged in the audio component descriptor AUDR in the event information table EIT is ruled out as a low priority rule. Then, priority is given to the packet identification PID set in the program map table PMT.

  Therefore, in this case, even if b6-b5 of the component type ACTY (component_type) arranged in the audio component descriptor AUDR in the event information table EIT is “00”, the packet set in the program map table PMT The identification PID is given priority. That is, in this case, the user (viewer) cannot determine whether or not the sub-audio with the priority selection set is included at the EPG stage.

  In the twelfth embodiment, in the on-air real-time reception, a preset sub audio signal can be automatically selected. However, when recording and reproducing, the packet identification PID set in the program map table PMT is given priority.

  Thus, the twelfth embodiment can be applied to recording reservations. For example, at the time of recording, all audio signals (elementary streams ES) set in the program map table PMT of the program are recorded (recorded and accumulated). At the time of recording / playback, priority is given to the packet identification PID set in the program map table PMT.

  Further, in the current existing operation regulations, b6-b5 of the component type ACTY of the audio component descriptor AUDR is “00”, which is a rule of fixed operation.

  Therefore, when b6-b5 is newly operated in the future, the priority order may be defined by the set value of b6-b5. For example, when the set value of b6-b5 is “01” or “10”, this bit may be prioritized. At the same time, when the setting value of b6-b5 is “00”, the setting value of the component tag CMTG or the packet identification PID may be prioritized.

  When the contents described in the first to twelfth embodiments are used, the identification information indicating that the sub audio signal has the audio signal for the visually impaired person or the attribute of the multilingual audio signal is used as the video signal or the communication signal. Can be placed inside. The receiver 300 can use this identification information to understand that the corresponding sub audio signal is an audio signal for the visually impaired or multilingual audio.

  Further, a means for giving priority to the display of the above audio signal in preference to the default audio signal is provided based on the user operation. In this means, when the sub audio signal to be prioritized exists in the program map table PMT of the selected program, the sub audio signal is preferentially reproduced. On the other hand, when the sub audio signal to be prioritized does not exist in the program map table PMT, a default audio signal is reproduced.

  The embodiment shown in FIG. 26 or FIG. 35 shows a method for transmitting a broadcast signal in units of transport stream packets TSP. However, the system of the present embodiment is not limited thereto, and broadcast signals or communication signals may be transmitted in other formats.

  In the system system of another embodiment, FIG. 50 shows a transmission form of a broadcast signal, and FIG. 51 shows a transmission form of a communication signal. FIG. 52 (a) shows the data structure in the transmission signal corresponding to FIG. 50, FIG. 52 (b) shows the data structure in the transmission signal corresponding to FIG.

  As shown in FIGS. 52D and 52E, an MPEG media transport protocol packet header MMTH is arranged in the MPEG media transport protocol payload header PMLH in the MPEG media transport protocol packet MMTP.

  In addition, a packet identifier MPID is arranged therein (FIG. 53 (a)). The control signal 3100 and the encoded signal 3200 can be identified by the set value in the parameter setting area of the packet identifier MPID.

  For example, as shown in FIG. 53 (b), when a numerical value within the range of “0x0100 to 0x7FFF” is set as the setting value in the parameter setting area of the packet identifier MPID, the transmission data section DATA (FIG. 52 (c)). ) Contains (a part of) the content of the encoded signal 3200.

  Further, when a value of “0x8000” is set in the parameter setting area of the packet identifier MPID, information similar to various information in the event information table EIT is stored in the transmission data section DATA (FIG. 52 (c)). Enters.

  Therefore, identification information corresponding to an encoded signal (such as an audio signal, a video signal, or a caption signal) having an attribute suitable for a viewer who is not free of vision or hearing is set as a set value (or set value range) in the packet identifier MPID. You may give it to.

  Specifically, a part of the set value range “0x0100 to 0x7FFF” corresponding to an area that can be assigned even outside the control message or a set value range “0x9000 to 0xFFFF” corresponding to the operator settable area is visually Alternatively, identification information corresponding to an encoded signal (an audio signal, a video signal, a caption signal, etc.) having an attribute suitable for a viewer who is not free of hearing is associated.

  In the example of FIG. 53 (c), the range of “0x0100 to 0x7FFF” is set in the allocation area 4300 of the encoded signal having the specific attribute. Then, as shown in FIG. 53 (d) or 53 (e), various attributes of the encoded signal may be presented.

  In the system of this embodiment, information corresponding to the various tables shown in FIGS. 27 and 30 can be arranged in the MPEG2 section message. Therefore, not only the set value in the packet identifier MPID but also the information (the set numerical value range) corresponding to the component tag CMTG and component identification ACTY in the system of this embodiment may have the identification information.

  Although several embodiments of the present invention have been described, these embodiments have been 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, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. Furthermore, in each constituent element of the claims, even when the constituent element is expressed in a divided manner, when a plurality of constituent elements are expressed together, or when they are expressed in combination, they are within the scope of the present invention. Further, a plurality of embodiments may be combined, and an example constituted by this combination is also within the scope of the invention.

  In addition, for the sake of clarity, the drawings may be schematically represented with respect to the width, thickness, shape, etc. of each part as compared to actual aspects, but are merely examples, and The interpretation is not limited. In addition, in the present specification and each drawing, components that perform the same or similar functions as those described above with reference to the previous drawings are denoted by the same reference numerals, and repeated detailed description may be omitted as appropriate. . In addition, when the claims are expressed as control logic, when expressed as a program including instructions for causing a computer to execute, and when expressed as a computer-readable recording medium describing the instructions, the apparatus of the present invention is applied. is there. Further, 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 contents and the same concept.

DESCRIPTION OF SYMBOLS 100 ... Broadcast station, 101 ... Broadcast station server, 102 ... 1st security function, 103 ... 1st basic function, 120 ... Service provider apparatus, 140 ... Receiver 141, communication control unit, 142, second basic function, 143, second security function, 144, application management function, 145, API, 146, application, 160 ... Display, 162 ... HDD, 201 ... Video encoder, 306 ... Video decoder, 309 ... Analysis unit, 330 ... Control unit, 327 ... Display control unit, 328 ..Display, 329 ... Speaker, 501 ... Tuner unit,
801-1, 901-1, 1301-1 ... first tuner section,
801-2, 901-2, 1301-2 ... second tuner unit, 1301-3 ... third tuner unit,
502, 802, 902, 1302 ... descrambler,
506, 806, 906, 1306 ... control unit,
511, 811, 13111 ... IC card, 911-1 ... first IC card, 911-2 ... second IC card, 1501 ... tuner / demodulator,
1601-1, 1801-1 ... 1st tuner part (4K8K),
1601-2, 1801-2 ... second tuner (4K8K),
1601-3, 1801-3 ... 3rd tuner part (4K8K), 1801-4 ... 4th tuner part (2K), 1801-5 ... 5th tuner part (2K),
1502, 1602 ... descrambler, 1802-1 ... first descrambler, 1802-2 ... second descrambler,
506, 806, 906, 1306 ... control unit,
1511, 1611, 18111 ... CAS module,
3000-1 ... set value, 3100 ... control signal,
3110-1, 3110-2 ... tag values,
3115-1, 3115-2 ... Contents to be allocated, 3200 ... Encoded signal, 3400 ... Area that can be specified / operated for each conventional broadcaster,
3452, 3552... Comment audio signal allocation area (for visually impaired people),
3454, 3554 ... Special audio signal allocation area (for those who have difficulty hearing audio signals),
3456, 3556 ... Allocation area of sign language video signal (for people who have difficulty hearing audio signals),
3458, 3558 ... Subtitled video signal allocation area,
3460, 3560... Subtitle allocation area corresponding to each language.

Claims (1)

In a receiver capable of receiving a broadcast signal including predetermined identification information or a communication signal including predetermined identification information,
The identification information corresponds to a predetermined encoded signal,
The predetermined encoded signal is a receiver adapted to a person who is not free of sight or hearing.

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