WO2022222470A1

WO2022222470A1 - Receiver

Info

Publication number: WO2022222470A1
Application number: PCT/CN2021/133075
Authority: WO
Inventors: 田中克则
Original assignee: 海信视像科技股份有限公司; 东芝视频解决方案株式会社
Priority date: 2021-04-22
Filing date: 2021-11-25
Publication date: 2022-10-27
Also published as: CN116158026A

Abstract

The present application provides a receiver. During CAS processing of the receiver, the receiver can be used when different B-CAS cards are present in a mixed manner in MJD processing. The receiver is a receiver of digital broadcasting, and is provided with a control unit. The control unit acquires interpretation information from a card, which retains the interpretation information for descrambling a scrambled broadcast signal that is broadcast by means of digital broadcasting, and descrambles the scrambling by using the interpretation information to acquire the broadcast signal. Once a power source of the receiver is set as turned on, the control unit outputs a command to the card; acquires, from the card, a response containing a version of a card identifier for identifying a card, and a message; and displays the message on a display unit for a specified time on the basis of the version of the card identifier.

Description

receiver

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Japanese Patent Application No. 2021-072602 filed with the Japan Patent Office on April 22, 2021 and entitled "Receiver", and filed with the Japan Patent Office on April 23, 2021, The priority of the Japanese Patent Application No. 2021-073197 and the title of the invention is "System", the entire contents of which are incorporated herein by reference.

technical field

This application relates to receivers.

Background technique

In digital broadcasting, a transmission time offset table (Time Offset Table: TOT) is specified in ARIB STD-B10 to provide information about the current time and date and offset time information when daylight saving time is implemented. The Modified Julian Day (MJD) transmitted through TOT is represented by 16 bits, and the most future date is represented by 0xFFFF on April 22, 2038. In order to also correspond to after April 23, 2038, in the relevant standards, the method of extending to February 28, 2100 (extended MJD) is specified. Specifically, on the receiver side, a date and time such as when the receiver was shipped is stored, and when the information of the past date is transmitted more clearly than that, "1" is set to the 17th bit and calculation processing is performed.

prior art literature

Non-patent literature

Non-Patent Document 1: TR-B15 Volume 4 Version 7.9

Non-Patent Document 2: TR-B39 Vol. 5 Version 1.7

SUMMARY OF THE INVENTION

However, the B-CAS (registered trademark) card bundled with the receiver has different processing for MJD (MJD processing) depending on the time of card payment. B-CAS cards that start paying after a certain period correspond to dates after April 23, 2038. On the other hand, its previous old B-CAS card does not correspond to dates after April 23, 2038.

The problem to be solved by the present disclosure is to provide a receiver, a receiving method, and a system that can be used in a situation where a plurality of B-CAS cards with different MJD processes coexist.

The receiver according to the present disclosure is a receiver of digital broadcasting, and includes a control unit that stores interpretation information for descrambling a scrambled broadcast signal broadcasted by the digital broadcasting. The card acquires the interpretation information, uses the interpretation information to cancel the scrambling and acquires the broadcast signal, and the control unit outputs a command to the card just after the power of the receiver is turned on , obtaining a response from the card including the version of the identification card used to identify the card and a message, and displaying the message on the display unit for a prescribed time based on the version of the card identification.

In some embodiments, in the above-described receiver, the control unit cancels the display of the message when a cancel command is received from the user while the display unit is displaying the message.

In some embodiments, in the above receiver, the control unit outputs a command to the module during initial setting of the receiver, obtains the response from the module, and based on the version of the module, in the The display unit displays the message for a predetermined time.

The system according to the present disclosure includes a receiver of digital broadcasting, and a card that holds interpretation information for descrambling a scrambled broadcast signal broadcasted by the digital broadcasting, the receiver including a control unit, The control unit acquires the interpretation information from the module, uses the interpretation information to cancel the scrambling, and acquires the broadcast signal, and after the control unit turns on the power of the receiver, A command is output to the module, a response including information for identifying the version of the module is obtained from the module, and based on the version of the module, a message urging the use of a new version of the module is displayed on the display unit as specified time, the module receives the command, and according to the command, outputs information for identifying the version of the module.

In some embodiments, in the above-described system, the control unit cancels the display of the message when a cancel command is received from the user while the display unit is displaying the message.

In some embodiments, in the above system, the control unit outputs a command to the module during initial setting of the receiver, obtains the response from the module, and based on the version of the module, converts the The message is displayed on the display unit for a prescribed time.

Description of drawings

FIG. 1 is a diagram showing an example of the overall system configuration of a broadcasting station and a receiver according to an embodiment;

FIG. 2 is a diagram schematically showing a configuration of a broadcasting station according to the embodiment;

FIG. 3 is a diagram showing the configuration of the receiver according to the embodiment in detail;

4 is a diagram showing an example of the MJD period used by the system according to the embodiment;

5 is a flowchart showing an example of processing operations when the receiver according to the first embodiment displays an automatic message;

6 is a flowchart showing a process of exchanging the receiver and the IC card (B-CAS card) according to the embodiment;

7 is a diagram showing an example of a response message area of an automatic display message of the receiver application according to the embodiment;

FIG. 8 is a diagram showing one of the card identifiers (versions) in the B-CAS card according to the embodiment;

9 is a flowchart showing an example of processing operations when the receiver according to the second embodiment displays an automatic message during channel selection;

FIG. 10 is a diagram showing an example of the display operation of the automatic display message of the receiver according to the embodiment;

11 is a flowchart showing an example of interaction between a receiver and an IC card (B-CAS card) according to this embodiment;

12 is a flowchart showing an example of processing operations when an automatic message is displayed during the initial setting of the receiver according to the third embodiment;

FIG. 13 is an example of the format of the command and reply of the system according to this embodiment.

Description of reference numerals

100... Broadcasting Station, 101... Broadcasting Station Server, 102... 1st Security Function, 103... 1st Basic Function, 120... Service Operator Device, 140... Receiver, 141 ... 2nd basic function, 142 ... communication control unit, 143 ... 2nd security function, 144 ... application management function, 145 ... API, 146 ... application, 160 ... display , 162...HDD, 201...video encoder, 302...descrambler, 303...CAS module, 303a...IC card reader, 304...demultiplexer, 306...video decoder, 309...analysis unit, 321...program information storage area, 330...control unit, 327...display control unit, 328...display, 329... speaker.

Detailed ways

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

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

The broadcast station 100 includes a broadcast 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, and includes encoding (also referred to as encoding) and multiplexing the video signal, audio signal, etc. of the broadcast program as a broadcasting signal (the broadcasting signal may also be a terrestrial digital television broadcast). , BS digital broadcasting, wideband CS digital broadcasting, high BS digital broadcasting, high wideband CS digital broadcasting and other broadcast signals of any type of broadcast wave) and send the function. The transmitted signal therefore also includes a path via the satellite. In addition, the transmit signal may also contain cable-based paths.

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

The broadcast station server 101 is an area that is stored in advance in order to transmit raw data such as program title, program ID, program outline, performers, broadcast date and time, and other data to a receiver (also referred to as a receiver) through a broadcast signal. .

The first security function 102 can perform settings related to protection of contents (programs) included in broadcast waves transmitted by broadcast stations.

The service operator device (may be referred to as a service operator) 120 cooperates with the broadcasting station 100 to create, manage, and provide content (also referred to as a service that provides additional application functions to programs broadcast by the broadcasting station 100 at the same time). distribute). Service operator device 120 includes application management/distribution 121 and application server 122 .

The application management/distribution 121 performs management of the content stored in the application server 122 and applications, and distribution to the receiver 140 . The application server 122 is an area that stores contents and applications provided to the receiver 140 .

Further, in response to a request from the receiver 140 that received the first designation information, the service provider device 120 transmits the application and content stored in the application server 122 to the receiver via the application management/distribution 121 via a communication network such as the Internet 140.

The receiver 140 includes a digital broadcast reception 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 a control unit 147, It is possible to receive broadcast signals broadcasted from the broadcast station 100 and receive various broadcast programs and various service information, or acquire and operate an application from the service operator apparatus 120 via a communication network.

The second basic function 141 is a basic function of the receiver, and has a function of receiving a broadcast wave transmitted from the broadcast station 100 and converting an encoded video signal (also referred to as a video stream) contained in the broadcast wave. The coded audio signal (also called audio stream) and the control signal such as the transmission control signal are separated, and the video signal and the audio signal are decoded or the control signal such as the transmission control signal is analyzed.

In addition, the second basic function 141 also manages the connection with peripheral devices connected to the receiver 140, such as the display 160, the HDD (Hard Disk Drive) 162 bound to the receiver 140, the connection of the removable medium 170, and the transmission and reception of data .

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

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

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

FIG. 2 is a diagram schematically showing a main configuration of a broadcasting station 200 (corresponding to 100 in FIG. 1 ).

The broadcasting station 200 includes a video encoder 201, an audio encoder 202, a subtitle encoder 203, and an additional data generation unit 204 that generates control data including a transmission control signal and the like, service data, and control through reception Additional data such as application control information of the application 145 that operates on the machine 140 . Furthermore, the broadcast station server 211 (corresponding to 101 in FIG. 1 ), the first security function 212 (corresponding to 102 in FIG. 1 ), and the transmission/reception unit 213 of the broadcast station 200 cooperate with each other. Together with the video encoder 201, the audio encoder 202, the subtitle encoder 203, the additional data generating unit 204, the multiplexing unit 205, the scrambler 206, the transmitter 207, and the transmitting and receiving unit 213, it is called a first basic function 210 ( Corresponding to 103 in Fig. 1). The encoding type of the video encoder 201 may be any of MPEG-2, H.264 (MPEG-4 AVC (AVC: Advanced Video Coding)), and H.265 (HEVC: High Efficiency Video Coding). In addition, the kind of encoding is not limited to this.

In addition, as the multiplexing method, an MPEG-2 system method such as the MPEG-2 TS method or the MPEG Media Transport method (MMT method) can be used, or a combination of the two can be used. Furthermore, the multiplexing method is not limited to this.

The outputs of the video encoder 201 , the audio encoder 202 , the subtitle encoder 203 , and the additional 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 an antenna by broadcast waves.

The transmission control signal generated by the additional data generating unit 204 is formed in a specific format called a table, and has an information description area called a descriptor.

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

The second basic function 315 includes a broadcast tuner 301, a descrambler 302, a CAS module 303, an IC card reader/writer 303a, a demultiplexer 304, a data broadcast reception processing unit 305, a video decoder 306, and an audio decoder 307 , a subtitle decoder 308 , a parsing unit 309 , and a data broadcast engine 310 .

It should be noted that the CAS module 303 is an independent device from the receiver, and the IC card reader/writer 303a is an interface that communicates with the CAS module 303 (B-CAS card).

The broadcast tuner 301 demodulates a stream (broadcast signal) transmitted by broadcast waves. The demodulated stream (broadcast signal) is input to the descrambler 302 . The descrambler 302 uses the key from the CAS (Conditional Access System) module 303 to descramble the input stream. The stream descrambled by descrambler 302 is input to demultiplexer 304 .

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

Further, control data including application control information, service data, transmission control signals, and the like included in the additional data are analyzed by the analyzing 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 the display signal displayed on the display 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 sent display signal, and outputs the content analyzed via the synthesizer 326 to the display control unit 327 . 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 sent display signal.

The decoded video signal and subtitle signal are synthesized by the synthesizer 326 and output to the display 328 via the display control unit 327 . The display control unit 327 performs the setting of the gamma characteristic, the setting of the display screen size, the setting of the display signal level, and the like.

Further, the sound data decoded by the sound decoder 307 is output to the speaker 329 (corresponding to 161 in FIG. 1 ).

3 shows an example in which the display 328 and the speaker 329 are built in the receiver 300, but for example, an external display and speaker connected via I/F such as HDMI may be used. The display control unit 327 also controls the content displayed on the display 328 even when the display 328 is an external display connected to the receiver 300 through I/F such as HDMI.

The analysis unit 309 analyzes the application control information, service data, and control data, and sends the analysis result to the control unit 330 at any time. The transmission control signal included in the control data includes the channel identification information and program identification information of the program of the multiplexed video signal, and further includes a service indicating that the program to which the multiplexed video signal is added simultaneously provides an application function 1st specified information. The analysis unit 309 extracts the channel identification information, program identification information, and first designation information by analyzing the received control data, and transmits the extraction result to the control unit 330 at any time.

Furthermore, the receiver 300 has 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 (corresponding to 144 in FIG. 1 ) 146). The control unit 330 may be a computer including a CPU and a memory that can execute a computer program.

When the second security function 322 reads the information related to the protection of the content from the transmission control signal included in the broadcast wave, and outputs it to another device (not shown) on the home network via the network I/F 341, it sends the information to the connected device. Peripheral devices (not shown, corresponding to 162 and 170 in FIG. 1 ) perform content protection processing when outputting. The API 324 is an I/F for the application management function 323 to operate in cooperation with the application 325 .

The application management function 323 manages applications preset in the receiver 300 and applications acquired via a communication network. In addition, the application management function 323 controls the execution of the application 325 preset in the receiver 300 and the application 325 acquired via the communication network via the API 324 which is an application interface (I/F).

In addition, the encoding type of the video decoder 306 corresponds to the broadcast media received by the broadcast tuner 301, that is, terrestrial digital television broadcasting, BS digital broadcasting, wideband CS digital broadcasting, advanced BS digital broadcasting, advanced wideband CS digital broadcasting, and narrowband digital broadcasting. The corresponding encoding types of broadcasts received by CS digital broadcasting can be MPEG-2 (terrestrial digital TV broadcasting, BS digital broadcasting, broadband BS digital broadcasting), H.264 (AVC: Advance Video Coding) (narrowband CS digital broadcasting), Any of H.265 (HEVC: High Efficiency Video Coding) (High BS Digital Broadcasting, High Broadband CS Digital Broadcasting). In addition, the kind of encoding is not limited to this.

The communication control unit 340 has a network I/F 341 , which is an I/F with the communication network 351 , and a remote controller I/F 342 , which is an I/F with a remote controller (remote controller) 352 .

The control unit 330 outputs an instruction (command) to the CAS module 303 to decode the ECM and EMM in order to extract the scrambling key (Ks) necessary for descrambling from the encrypted ECM and EMM sent from the analyzing unit 309 . The CAS module 303 decodes the ECM and EMM and extracts the scramble key (Ks) based on the instruction of the control unit 330 . When the CAS module 303 extracts the scramble key (Ks), it 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 , it 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) in an internal memory or the like (not shown). When descrambling the scrambled broadcast signal, the descrambler 302 performs descrambling using the scramble key (Ks) stored therein. The CAS module 303 is, for example, a B-CAS card or the like, and as described above, receives commands (instructions) output from the control unit 330 , operates in accordance with the commands, and outputs a response (reply) to the control unit 330 .

The most future date of the encoded 16-bit MJD transmitted through TOT (Time Offset Table) included in SI (Signaling Information) such as transmission control information means April 22, 2038, represented by 0xFFFF. Therefore, regarding April 23, 2038 and later, in ARIB TR-B15 Title IV "About 16.3 MJD after 2038," the method for extending to February 28, 2100 is specified. In addition, in ARIB TR-B39, Part 5 "Consideration of MJD in 5.24 CAS", as CAS, the reference date on which "1" exists in the 17th bit of MJD that is regarded as being processed by the receiver is specified.

FIG. 4 is a diagram showing an example of the MJD period used by the system according to the embodiment, and is a diagram shown in FIG. 5-5 of ARIB TR-B39. Based on Fig. 4, the consideration of MJD in CAS is presented below.

The lower 16 bits (MJD value) of the encoded bits representing MJD (Modified Julian Date) are all "1" on a certain day in 2038 of the Gregorian calendar, and all "0" on the second day, so in the fourth Edit 16.3 (Regarding MJD after 2038), it is stipulated that "On the receiver side, the date and time when the receiver was shipped, etc. is stored, and when the information of the past date is transmitted more clearly than that, it is set in the 17th bit. "1" to calculate and process.

On the other hand, in CAS, the same MJD value is commonly used by the receiver 300 and the IC card (CAS module 303 ), so it is necessary to unify so that there is no inconsistency between the interpretations of the two. Therefore, the base date of the MJD, which is CAS, is set, the base date is the most past date (the smallest day whose 17th bit is calculated as "0"), and the date one day less than the base date is set as the most future date. Date (the maximum day calculated by setting "1" in the 17th bit). Specifically, this consideration is applied to the following MJDs used in CAS.

(1) Message code area of EMM separate message column

·Validity period

(2) Contract confirmation order

· Program broadcast day

(3) Automatically display message display information acquisition command

·Current year, month and day (command)

· Expiration date (reply)

(4) Power-on control information request command

・Starting date of power on

In the present embodiment, the expiration dates of (1) and (3) above are values that are used by the CAS module 303 (IC card, B-CAS card) but not used by the receiver 300 . In FIG. 4 , the base date of the MJD as CAS is set to 0x5840 (September 25, 1920). The most future date is 0x1583F (February 28, 2100, the 17th bit is assumed to be a value of "1").

The current date and current time information (JST_time) are transmitted through the TOT. This time is specified as "UTC (Universal Standard Time) + 9 hours" by ARIB STD-B10, and it will not change throughout the year even if the daylight saving time system is introduced. The receiver 300 can use the TOT for the correction of the internal clock, and use the TOT as a reference for time display, synchronization notification, and the like. The information of date and time is represented by a total of 40 bits of encoded MJD lower 16 bits (year, month, day) and JTC24 bits (hour, minute, second) (refer to ARIB STD-B10 Part 2 Appendix C), among which, Encodes JST as 6 binary decimal numbers in 4bit units. The following shows the MJD after 2038.

The lower 16 bits of the MJD are all "1" on a certain day in 2038 of the Gregorian calendar, and all "0" on the second day. If the conversion formula in Appendix C of ARIB STD-B10 Part 2 is used, all "0"s go back to the 1800s. Therefore, in BS digital broadcasting, the following operations are performed.

・The conversion formula specified in Appendix C of ARIB STD-B10 Part 2 is applied directly after 2038 and until February 28, 2100, and the lower 16 bits of the converted MJD value are sent.

· The receiver 300 stores the date and time when the receiver was shipped, and when the information of the past date is transmitted more clearly than that, "1" is set in the 17th bit to calculate and process.

· The conversion formula itself, which requires a new definition of MJD after 2100, is unknown at the current moment.

1st Embodiment

In the present embodiment, an example is shown in which the receiver 300 checks the IC card (CAS module 303 ) when the sub power of the user receiver 300 is turned on, and when receiving the channel of the automatic display message service, when the receiver 300 is not turned on When an IC card is attached or when the IC card is not valid, the default automatic display message is displayed for a certain period of time. The automatic display message display function is required in CAS.

5 is a flowchart showing an example of processing operations when the receiver according to the first embodiment displays an automatic message, which may be implemented by a computer program.

For example, the user transmits a power-on command to turn on the power of the receiver 140 from the remote controller 352 . The receiver 140 receives the power-on command, turns on the sub power according to the power-on command, and receives a broadcast signal. The control unit 330 analyzes the received broadcast signal, and confirms that the channel (designated by CA_service_descriptor of the CAT included in the transmission information signal) for the automatic display message service is received (step S102). The confirmation in step S102 may include a case where a program received and accumulated by a receiver having an accumulation and reception function (not shown) is broadcast. In step S102, when the received service performs the automatic display message service, the control unit 330 checks the IC card (CAS module 303) (YES in step S102).

FIG. 6 is a flowchart showing a process in which the receiver according to this embodiment interacts with an IC card (B-CAS card), which may be implemented by a computer program.

The control unit 330 confirms that the CA_system_id described in the CA service descriptor described in the received CAT matches the CA_system_id obtained by the IC card response and that the service_id being selected is described (step S121 ). The control unit 330 analyzes the received broadcast signal, determines whether the EMM message included in the broadcast signal is a mail or an automatic display message, and receives the automatic display message (step S121). More specifically, in the EMM individual message column, it is performed with reference to the message control of the unencrypted header of the message body. In the case of "IC card accumulation (0x01)", it is a message corresponding to an automatic display message. The automatic display message is obtained or included from the EMM individual message (IC card accumulation message) transmitted to each receiver 300 and the EMM common message transmitted in common to all receivers. The EMM individual message is stored in the IC card, and the EMM common message is basically received when the display is executed.

The EMM individual message of the automatically displayed message must be encrypted, decoded by the CAS module 303 (IC card or B-CAS card), and stored in the IC card. It should be noted that there are B-CAS cards corresponding only to 2K terrestrial digital broadcasting/satellite digital broadcasting, and ACAS chips corresponding to 4K high-broadband satellite digital broadcasting and 2K terrestrial digital broadcasting/satellite digital broadcasting, which are collectively referred to as CAS modules. . The control unit 330 receives the command/reply using the EMM individual message, sends the message code area to the mounted IC card, and acquires the response message code (steps S123, S124). More specifically, the length of the message code area is shorter than the message division length obtained by the initial setting condition command, and the control unit 330 transmits one command to the IC card without division (step S123). The CAS module 303 (IC card) responds to the control section 330 with the value of the message code area together with the decoded automatic display message (step S124).

7 is a diagram showing an example of a response message area of the automatic display message of the receiver application according to the embodiment, and each of D101 to D107 shows “items in message code area” and “description of items on the left” , "Number of bits assigned to the item on the left".

The control unit 330 ignores (does not confirm) or stops the tampering check (corresponding to D101 in FIG. 7 ) and expiration date (corresponding to D102 in FIG. 7 ) included in the response message code area in the response received in step S124 . The function is confirmed (steps S125, S126). Thereby, the automatic display message can be used regardless of the expiration date. In addition, when a message is displayed automatically, there may be stuffing (corresponding to D107 in FIG. 7 ) in the final part of the response message code area. The control section 330 does not confirm (ignores) the padding or stops the confirmation function. If there is an automatic display message in the response received in step S124, the control unit 330 displays it on the display 328 (Yes in step S127, step S128). In addition, the default automatic message is stored in a memory (not shown) of the receiver 300 or the like, and when a response is received from the IC card, the default automatic message in the memory may be displayed on the display 328 .

Through the above steps, the control unit 330 can automatically perform the tampering check (D101 in FIG. 7 ) and the expiration date (D102 in FIG. 7 ) of the response message received from the CAS module 303 (IC card, B-CAS card). Display messages are displayed on display 328 .

Returning to step S102 in FIG. 5 , when the control unit 330 confirms that there is an automatic display message in the response received in step S127 in FIG. 6 , it confirms the status of the IC card (CAS module 303 ) (YES in step S102 , step S103 ) . The status of the IC card (valid/invalid/unusable) is defined as follows in TR-B15 Part 1, Part 5, 4.16.

Since the IC card reader/writer 303a of the receiver 300 has a function (electrical detection, etc.) to detect whether the IC card is mounted, the receiver 300 can confirm the mounting state of the IC card by the output from the IC card reader/writer 303a.

・A valid IC card refers to the response of ca_system_id and system_management_id described in Part 7 of this book through the "Initial Setting Condition Command" in ARIB STD-B25 Part 1.

- An invalid IC card refers to a card that does not satisfy the above-mentioned conditions of a valid IC card and the card type is "00" (prepaid card, not in operation).

· Even if it is a valid IC card, if the return code is A1FF or A102, in order to distinguish it from an invalid IC card, it is set as an unusable card in this book.

· When the program being received is a scrambled broadcast or the IC card is invalid or unavailable, the error message described in the main scenario 4.18 Error notification screen is displayed.

・When the program being received is non-scrambled and the service_id being selected is described in the CA service descriptor described in CAT, and the IC card is invalid, and the IC card that is valid for Main Scenario 4.19 is not inserted The action described by the action. In the case of an unusable card, the error message described in Main Scenario 4.18 "Error Notification Screen" is displayed.

· The processing after power-on (eg, last channel display, menu display, etc.) is not specified.

When the state of the IC card (CAS module 303) is not mounted or invalid, the control unit 330 displays the default automatic display message on the display device 328 for a certain period of time (Yes in step S103, S104). In the message display in step S104, the display time is described by an internal clock or the like, and after a predetermined time specified in advance by SI(EMM), the message is cleared or the display is stopped (YES in step S105, S106). In addition, in step S105, after the user's remote controller 352 or the like presses the confirmation button or the like, and the control unit 330 receives the command to delete the message, the deletion or stop of S106 may be performed. After the display message is cleared in step S106, the user watches the program (step S107). By this step, it is possible to prevent the user's viewing from being disturbed due to the display of the default message. In addition, the timing of displaying and erasing the default automatic message (steps S104 and S107 ) and the like are specified in the EMM included in the broadcast signal. When the status of the IC card (CAS module 303) is not installed or invalid, the default automatic message is displayed as "No valid IC card is installed", and in the case of a contract renewal notice, for example, "The contract ends in xx days. If the contract cancellation procedure has not been carried out, the contract will be automatically renewed." and so on.

On the other hand, in step S103, if the IC card (CAS module 303) is not unmounted and is a valid IC card (it is not the case that the IC card is not mounted or invalid), the card identification is used to confirm the "card identification version" (NO in step S103, S108). In the present embodiment, the "version of the card b logo" is defined, and the "version of the card logo" is used to identify the B-CAS card to be displayed, such as a card of a new version. The "version of the card ID" is recognized, and according to the recognition result, only the old card is displayed as a message (MSG). In addition, also in the case of NO in step S102, the process proceeds to step S108 similarly.

FIG. 8 is a diagram showing an example of a card ID (version) in the B-CAS card according to the embodiment.

As the card identification (version) in the B-CAS card,

use

001, 002, and 003. 001 represents the first generation card, the number of bits recorded in MJD is 16 bits, 002 represents the second generation card, and the number of bits recorded in MJD is 16 bits. 003 represents the third-generation card, and the number of bits recorded in MJD is 17 bits.

Returning to step S108 in FIG. 5 , if the "version of card identification" is "001" or "002", "Please assemble and use a new IC card bundled with the receiver. If you continue to use the old card, The broadcast reception may not be possible." This message (MSG) is displayed on the display 328 (Yes in step S108, S109). After displaying the MSG in step S109, the control unit 330 describes the display time. After the MSG is displayed in step 109, the user presses a confirmation button or the like from the remote controller 352 or the like to clear the message, and when the control unit 330 receives a command to clear the message, the displayed MSG is cleared or the display of the MSG is stopped (step Yes of S110, S112). On the other hand, when the control unit 330 has not received the command to clear the message (No in step S110 ), the control unit 330 checks the described display time, and when the display time elapses for a predetermined time (5 to 10 seconds) or more, the message is cleared. Alternatively, the display is stopped (Yes in step S111, S112). After the display message is cleared by step S112, the user watches the program (step S107). On the other hand, if the display time of the MSG in step S111 has not elapsed for a predetermined time (5 to 10 seconds) or more, the message is continued to be displayed (No in step S111). By this step, it is possible to prevent the user's viewing from being disturbed by the display of the message.

On the other hand, when the "version of the card ID" is other than "001" or "002", the message is not displayed (No in step S108). In addition, any value of "manufacturer identification of card identification" is not used for judgment.

Through the above steps, the user checks the IC card (CAS module 303) when the sub-power of the receiver 300 is turned on. If the IC card is not installed or is not a valid IC card, the default display can be displayed for a certain period of time. automatically displays the message. Furthermore, in the case where an IC card is mounted and is a valid IC card, MSG can be displayed according to the column of the card identification. In principle, the default automatic message is designated by the EMM (that is, the broadcast operator) included in the broadcast signal, and the display operation is specified, but the MSG in this embodiment is determined by the receiver 300 (control unit 330 ) solely by the version of the card ID, etc. show action.

In addition, the number of times of display of the messages in steps S104 and S109 may be suppressed so as not to hinder the user's viewing due to frequent display. For example, it may be set to be displayed only once a day at the time of the first startup, or the like.

Second Embodiment

In the present embodiment, an example of a case where a message is displayed when a user selects a channel is shown.

9 is a flowchart showing an example of the processing operation when the receiver according to the embodiment displays an automatic message at the time of channel selection, which may be implemented by a computer program.

The control unit 330 of the receiver 300 acquires the EMM individual message information stored in the IC card by interacting with the IC card's automatic display message display information acquisition command/reply during program selection (steps S201, S202). The validity period (corresponding to D102 in FIG. 7 ) included in the automatic display message display information acquisition reply is ignored by the receiver 300 (step S203 ). In addition, the receiver 300 may be provided with a function of confirming the expiration date included in the reply, and this function may be actively stopped.

The receiver 300 must generate an autodisplay message information acquisition command from a CA service descriptor. The receiver 300 acquires the message fixed phrase number from the EMM individual message information obtained from the IC card, and receives the corresponding EMM common message (step S204). The difference information in the EMM personal information message information is added to the received EMM common message information and displayed on the screen (step S205). In addition, there may be cases where there is no difference information.

10 is a diagram showing an example of the display operation of the automatic display message of the receiver according to this embodiment. When the automatic display message is displayed, the control unit 330 of the receiver 300 continues the automatic display according to the description in the main body of the EMM common message. At

times

1, 2, and 3, for example, as shown in FIG. 10, on/off control of the display is performed. The control unit 330 counts the number of times of automatic display, and repeats the on/off control of the above-mentioned display for the number of times of automatic display described in the main body of the EMM common message (No in step 206 ). After repeating the display of the automatic display message a predetermined number of times, the control unit 330 clears the display (Yes in step 206, S207). When a new program is selected again, the receiver 300 executes the above control again from step S201.

The receiver operations (corresponding to the operations of steps S206 and S207 ) for the three types of automatic display removal types described in the EMM common message column are as follows.

(1) 0x00: During the display period including the on/off of the message that can be erased, the message can be erased by the operation of the viewer

(2) 0x01: During the message display period that cannot be erased, message erasing is not performed by the operation of the viewer.

(3) 0x02: The display of the display clearing automatic display message is not performed. When the automatic display message display is updated to "display clear", the automatic display message display is stopped including the message box.

Hereinafter, the automatic display message and automatic display erasure types will be described in detail.

· The period until the display of the automatic display message is started is controlled by transmitting the delay period transmitted by the CA service descriptor to the IC card. In this case, since the schedule management is performed in the IC card, the receiver does not need to perform schedule management related to the postponement period, and only needs to acquire the command/reply based on the automatic display message information on the IC card.

· Regarding the automatic display message, the retransmission check of the same EMM individual message uses the message ID and business entity identification recorded in the EMM individual message column to perform the retransmission check of the same message. It is preferable that the receiver is equipped with a mechanism for preventing the re-reception of the same message, such as the message ID and business entity identification that was received just before, being stored.

· The version monitoring period of the EMM common message is performed during the display period of the EMM common message in use (the period in which the sum of the automatic display periods 1 to 3 is multiplied by the number of automatic display times). However, when the automatic display message type is 0x02 (display erased), version monitoring is always performed.

• When the main body of the message code is updated, it is reflected and displayed immediately. In addition, the count of the display period at the time of update may be newly counted from the time of the update (reload), or may be counted from the next display period (based on channel switching or the like), but the latter is preferable as much as possible.

·Items that are changed when the version number of the EMM shared message is updated are the message code body (including recommended display position information), the type of automatic display removal, the automatic display duration 1 to 3, and the number of automatic display times.

FIG. 11 is a flowchart showing an example of the interaction between the receiver and the IC card (B-CAS card) according to the embodiment, which may be implemented by a computer program.

For example, when the user selects a program received by the receiver 300 (step S221), the control unit 330 transmits to the CAS module 303 (B-CAS card) the information including the current date and time and that the MSG (message) is in operation. command (step S222). When the CAS module 303 receives the command, it judges the MSG (message) and sends a response (steps S223 and S224). More specifically, the CAS module 303 judges the presence or absence of the MSG and judges the validity period of the MSG based on the received command (step S223). The CAS module 303 includes the determined presence or absence of the MSG and the validity period of the MSG in the response together with the MSG phrase number, and transmits it to the control unit 330 (step S224). The control unit 330 receives and processes the response (step S225). The control unit 330 ignores the validity period of the MSG of the received response, checks the presence or absence of the MSG, and displays the received MSG on the display 328 when it is confirmed that the MSG exists. On the other hand, the control unit 330 ignores the validity period of the MSG of the received response, checks the presence or absence of the MSG, and when it is confirmed that there is no MSG, does not display the MSG on the display 328 .

Through the above steps, when the user selects the channel of the receiver 300 and uses an IC card processed by 16bits MJD as the CAS module 303 , a message (MSG) can be displayed on the display unit 328 of the receiver 300 .

Therefore, in the present embodiment, the control unit 330 of the receiver 300 is changed to the process of ignoring the expiration date of the automatically displayed message responded from the card (step S226), so that the determination of the MSG expiration date is unified into the processing in the card, Even if there are two types of IC cards of 16bitsMJD processing and 17bitsMJD processing, it is possible to continue the automatic display of message operation on a date exceeding MJD=0xFFFF.

3rd Embodiment

The present embodiment shows an example of a case where a message is displayed in the receiver's initial setting functions such as region setting, channel scanning, and network setting performed at the start of the first use of the receiver.

12 is a flowchart showing an example of the processing operation when an automatic message is displayed during the initial setting of the receiver according to the third embodiment, which may be implemented by a computer program.

When initializing the receiver 300, the control unit 330 confirms the version of the card ID (steps S301, S302). If the "Version of card ID" obtained by the card ID information acquisition command/reply is "001" or "002", "Please install and use a new IC card bundled with the receiver. If you continue to use the old IC card" card, the broadcast reception may not be possible." message (Yes in step S303, S304). In addition, when the card ID information display function is not provided in the initial setting function, it is preferable to display a message in the card ID information display function such as a menu. In addition, the "manufacturer identification of the card identification" is not used for judgment regardless of the value.

13 is an example of the format of the command and reply of the system according to this embodiment, (a) is the initial setting condition command in ARIB STD-B25 Part 1, (b) is the initial setting condition reply. D301 to D305, D351 to D363 represent "offset", "field", "length (Byte)", "value (HEX)" of "data".

Hereinafter, the format of the command/reply between the IC card (CAS module 303 ) and the digital DIRD (possibly the control unit 330 ) is defined.

· The "data" field of the initial setting condition reply indicates only the protocol unit with the IC card protocol unit number=0.

· Obtain information for filtering the ECM data and EMM data of the initial setting condition command, and the sharing conditions between the DIRD and the IC card, such as the type of the IC card.

• The card ID acquired by the initial setting condition command is an individual card ID. When the group ID is recorded in the IC card, "card ID information acquisition" is instructed by the reply IC card instruction, so the card ID information acquisition command is continuously issued to acquire the group ID.

In addition, the control unit 330 may display the information of the IC card acquired from the IC card (CAS module 303 ) on the display 328 . In more detail, it can also have the function of ARIB STD-B25 "Chapter 4 Technical Specifications Related to Receivers 4.2 User Interface, 4.2.10 Card Information Display". Specific functions, input, display items, etc. are shown below.

• Displays the information of the IC card acquired from the IC card.

・Display indicating that it is the display of card information

·As a card identification, it is displayed by manufacturer identification (ASCII1 text) and version (10 3 digits)

·Indicates that it is the display of the card identification

• As the card ID, the ID identification to the individual card ID to the check code are grouped into 20 digits in 10 digits, and segments are inserted every 4 digits and displayed. In addition, as details, ID identification (1 digit), individual card ID (10 to 14 digits), and check code (5 digits) are displayed, and segments are inserted every 4 digits.

・Indicates that it is the display of the card ID

• When there is a group ID, the ID identification - group ID - check code are combined and displayed as 10-to-20 digits, and segments are inserted every 4 digits.

· Indicates that it is the display of the group ID

Display of the group ID number corresponding to the selected ID (group ID number including the ID number)

- When the group ID number corresponding to the selected ID identification is not set, a message indicating that it is not set is displayed.

Through the above steps, in the initial setting function of the receiver 300, when an IC card of the first and second generation 16bits MJD processing is used as the CAS module 303, a message can be displayed on the display unit 328 of the receiver 300 (MSG).

According to at least one of the above-described embodiments, it is possible to provide a receiver that performs CAS processing so that there is no problem after April 23, 2038 even in the case of mixed B-CAS cards of 16bitsMJD processing/17bitsMJD processing A receiver, a receiving method, and a system for ground use.

In addition, as described above, the present embodiment includes the following characteristic structures. (A-1) The version of the card ID is judged and displayed when the receiver is activated. ("Version of card ID" is obtained through the card ID information acquisition command/reply when starting the receiver, in the case of "001" or "002", "Please assemble and use the new IC bundled with the receiver" If you continue to use the old card, broadcast reception may not be possible." This message is displayed for a predetermined time (5 to 10 seconds). (A-2) After the above message display is displayed for a predetermined time (5 to 10 seconds) , or after the user operates the confirmation button, it is cleared so as not to interfere with viewing. (A-3) The number of times of display is suppressed so that the above-mentioned message display is not frequently displayed to prevent viewing (once a day, only at the initial startup, etc.) ) (A-4) The version of the card ID is also judged and displayed during the initial setting of the receiver. (The "version of the card ID" is obtained through the card ID information acquisition command/reply when the receiver is started, and in "001" " or "002", the message "Please install and use a new IC card bundled with the receiver. If you continue to use the old card, broadcast reception may not be possible." is displayed.

In addition, the names, definitions, types, etc. of the condition parameters, options, numerical values, evaluation indexes, etc. displayed on the analysis screen shown in the drawings are shown as examples in the present embodiment, and are not limited to those in the present embodiment. example shown.

Although several embodiments of the present application have been described, these embodiments are presented as examples and are not intended to limit the scope of the present application. These new embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention, and the technical elements in each embodiment can be applied to other embodiments. . These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the aspects described in the claims and their equivalents.

In addition, in order to clarify the description, the drawings may schematically show the width, thickness, shape, etc. of each part compared with the actual form. In the block diagram, data and signals may be exchanged between blocks that are not connected or in the direction of arrows that are not connected even if connected. The processes shown in the flowcharts, timing charts, etc. may be performed by hardware including an IC chip, a digital signal processor (Digital Signal Processor or DSP), etc., or by software (programs, etc.) that are operated by a computer including a microcomputer, etc. Or a combination of hardware and software to achieve. In addition, even when the claims are expressed as control logic, when expressed as a program including an instruction to cause a computer to execute, and when expressed as a computer-readable recording medium in which the instruction is described, the present invention applies. device. In addition, the names and terms used are not limited, and other expressions are included in the present application as long as they have substantially the same content and the same spirit.

Claims

A receiver of digital broadcasting, wherein,

The receiver includes a control unit that acquires the interpretation information from a module that holds interpretation information for descrambling a scrambled broadcast signal broadcast by the digital broadcast, and uses the interpretation information to remove the scrambling and obtain the broadcast signal,

The control unit outputs a command to the module after turning on the power of the receiver, acquires a response including information for identifying the version of the module from the module, and based on the If the version of the module mentioned above is selected, a message urging the use of the new version of the module will be displayed on the display unit for a specified time.
The receiver of claim 1, wherein,

The control unit cancels the display of the message when a cancel command is received from the user while the display unit is displaying the message.
A receiver as claimed in claim 1 or claim 2, wherein,

The control unit outputs a command to the module during initial setting of the receiver, acquires the response from the module, and displays the message on the display unit for a predetermined time based on the version of the module.