JP4359158B2 - Digital broadcast receiving apparatus and contract program viewing method - Google Patents

Description

  The present invention relates to a digital broadcast receiving apparatus and a contract program viewing method.

  A digital broadcast receiving apparatus that receives a digital broadcast using a satellite or a terrestrial wave selects an arbitrary broadcast wave from a plurality of broadcast waves received through a dedicated antenna or a terrestrial antenna using a tuner, and selects the selected broadcast wave. A video / audio signal can be output by selecting an arbitrary channel from among a plurality of channels included in the wave by demultiplex processing, extracting a digital signal of the selected channel, and decoding the digital signal.

In such digital broadcasting, a limited reception service that can be viewed only by a contractor is provided, and an IC card (for example, a B-CAS card) is required to view the contracted program (Patent Document 1). reference).
JP-A-10-215441

  However, even if the user subscribes to the program at the home digital broadcast receiving apparatus, if the user wants to view the contracted program at the digital broadcast receiving apparatus on the go, it is inconvenient to have an IC card.

  In view of the above circumstances, an object of the present invention is to provide a digital broadcast receiving apparatus and a contract program viewing method that allow a contract program to be viewed using a portable terminal that is often held at all times.

  In order to solve the above-described problems, a first digital broadcast receiving apparatus of the present invention includes a memory that holds program contract information and a work key in a rewritable manner, and common information separated by demultiplex processing. A decryption unit that decrypts based on the work key, and a key supply unit that compares the decryption result with the contract information of the program to determine whether the content can be viewed and supplies a scramble key to the descramble unit when it is determined that the content can be viewed And means for storing the contract information and work key of the program transferred from the portable terminal in the memory.

  The first contracted program viewing method of the present invention is a method for viewing a contracted program on the first digital broadcast receiving apparatus, wherein the portable terminal accesses the server, and is determined to be a contractor. And when the contract information and the work key are transmitted from the server to the mobile terminal, and the contract information and the work key are transferred from the mobile terminal to the digital broadcast receiving device. To do.

  Further, the second digital broadcast receiving apparatus of the present invention uses a master key, a memory for holding the program contract information and the work key so as to be rewritable, and individual information separated by the demultiplexing process using the master key. A first decryption unit for decrypting and obtaining contract information and a work key; a second decryption unit for decrypting common information separated by demultiplex processing with the work key; and a decryption result of the second decryption unit; The program supply information is compared with the contract information of the program, and when it is determined that the program can be viewed, a key supply unit that supplies a scramble key to the descramble unit, and a master key transferred from the mobile terminal are stored in the memory. And means for storing.

  The second contracted program viewing method of the present invention is a method for viewing a contracted program on the second digital broadcast receiver, wherein the portable terminal accesses the server, and is determined to be a contractor. The master key is transmitted from the server to the portable terminal, the master key is transferred from the portable terminal to the digital broadcast receiver, and the contract is made to the digital broadcast wave in response to a request from the server. Including the step of placing the individual information of the user, and the step of receiving the individual information by the digital broadcast receiving apparatus and decrypting the individual information with the master key to obtain the contract information and the work key. Features.

  According to a third digital broadcast receiving apparatus of the present invention, a first memory that holds a master key for a portable terminal, a second memory that holds program contract information and a work key in a rewritable manner, and a demultiplexer A first decryption unit that decrypts the individual information separated in the plex processing with the master key for the portable terminal to obtain the contract information and the work key; and the common information separated in the demultiplex processing The second decryption unit that decrypts with the key, the decryption result of the second decryption unit and the contract information of the program is compared to determine whether or not viewing is possible, and when it is determined that viewing is possible, the scramble key is stored in the descramble unit A key supply unit to be supplied and means for transferring a master key for the portable terminal to the portable terminal.

  A third contract program viewing method according to the present invention is a method for viewing a contract program on the third digital broadcast receiving apparatus, wherein a master key for the portable terminal is transferred to the portable terminal. A step of accessing the server by the mobile terminal, a step of determining whether the mobile terminal is a subscriber and whether the master key for the mobile terminal transmitted from the mobile terminal is valid, the subscriber and the When it is determined that the master key for the mobile terminal is valid, a request for transmitting the individual information of the contractor is made from the server, and the master key for the mobile terminal is received from the server. The individual information of the contractor that can be decrypted by the digital broadcast wave is placed on the digital broadcast wave, and the digital broadcast receiver receives the individual information and is used for the portable terminal Characterized in that it comprises the steps of acquiring said decrypts the individual information and contract information and the work key at the master key, the.

  In the first or third digital broadcast receiving apparatus described above, the contract information is held within a limited time or while the connection state between the portable terminal and the digital broadcast receiving apparatus is maintained. It is good. Further, the second digital broadcast receiving device may be configured to hold the master key within a limited time or while the connection state between the portable terminal and the digital broadcast receiving device is maintained. .

  As described above, according to the present invention, the contract of the digital broadcast receiving apparatus on the go using the mobile terminal without contracting the IC card (B-CAS card or the like). The effect is that the program can be viewed.

(Embodiment 1)
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. Here, a case where a user views a BS (Broadcasting Satellite) digital broadcast is illustrated.

  FIG. 1 is a block diagram showing a digital broadcast receiver 29 of this embodiment. The antenna 1 is arranged outdoors in a predetermined direction and receives a digital broadcast wave. The antenna 1 generally includes a frequency converter, and supplies a received / frequency converted signal to the tuner 2.

  The tuner 2 extracts a signal of a specific frequency from the high frequency digital modulation signal including video / audio data. That is, a process of selecting one from a plurality of transponders of digital broadcasting is performed. Further, the tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, thereby demodulating the selected digital modulation signal and outputting a transport stream.

  The descrambling unit 3 performs a process of releasing the scramble performed in the pay broadcast using the key information obtained from the IC card equivalent unit 16A. The descrambling unit 3 also includes a demultiplex processing unit (DEMUX). The descrambled transport stream is converted into an MPEG2 (Moving Picture Experts Group 2) video stream, audio stream, and PSI. / SI (Program Specific Information / Service Information). The demultiplex processing unit supplies the video stream and the audio stream to the AV decoder 4 and supplies the PSI / SI to the CPU 13. As described above, a plurality of channels are multiplexed in the transport stream, and processing for selecting an arbitrary channel from among these is performed in the transport stream from the PSI / SI. Thus, it becomes possible by taking out data such as which packet ID is multiplexed. In addition, transport stream selection (transponder selection) can also be performed based on PSI / SI information.

  The AV decoder 4 includes a video decoder that decodes a video stream and an audio decoder that decodes an audio stream. The video decoder decodes the input variable length code to obtain a quantization coefficient and a motion vector, and performs inverse DCT transform, motion compensation control based on the motion vector, and the like. The audio decoder decodes the input encoded signal to generate audio data. The video data generated by the decoding is output to the video processing circuit 5, and the audio data is output to the audio processing circuit 6.

  The video processing circuit 5 receives video data from the AV decoder 4 and performs D / A conversion, for example, to convert it into a composite signal in the NTSC format. The audio signal processing circuit 6 receives the audio data output from the AV decoder 4 and performs D / A conversion to generate, for example, a right (R) sound analog signal and a left (L) sound analog signal.

  The video output circuit 7 and the audio output circuit 8 include an output resistor, an amplifier, and the like. The AV output terminal 9 is provided with an output unit (a set of left and right audio output terminals and video output terminals), and a monitor 18 having an image receiving unit 18a and a speaker 18b by a video / audio code 17 is provided in this output unit. Connected.

  The OSD (on-screen display) circuit 12 outputs bitmap data based on character information and the like output from the CPU 13 to the adder 20. The adder 20 performs processing for incorporating the bitmap data into the video. The OSD circuit 12 realizes EPG (Electronic Program Guide) screen display and the like.

  The IC card equivalent unit 16A is formed by incorporating a hardware part of an IC card (B-CAS card or the like) in the device 29, and has a memory for holding program contract information and a work key (Kw) in a rewritable manner. The decryption unit that decrypts ECM (entitlement control message), which is the common information separated by the demultiplex processing unit, based on the work key (Kw), and the decryption result and the contract information of the program can be compared and viewed. A key supply unit that performs the determination and supplies the scramble key (Ks) to the descramble unit 3 when it is determined that viewing is possible. Program contract information and work key (Kw) are given from the CPU 13 and rewritten. The CPU 13 receives the program contract information and work key (Kw) from the mobile phone, which will be described in detail later. The CA module 16 performs various information writing processing and reading processing between the CPU 13 and the IC card equivalent unit 16A.

  The remote control transmitter 10 is a transmitter for sending a command to the broadcast receiving device 29. When a key (not shown) provided on the remote control transmitter 10 is operated, infrared signal light (remote control signal) indicating a command corresponding to the key is transmitted from a light emitting unit (not shown). The remote control light receiver 11 receives the infrared signal light, converts it into an electrical signal, and gives it to the CPU 13. The remote control light receiver 11 can receive infrared signal light output from a mobile phone, convert it into an electrical signal, and provide it to the CPU 13. The CPU 13 decodes the signal output from the mobile phone based on the electrical signal.

  Here, it is assumed that there is a server for subscribers of digital broadcast viewing (hereinafter referred to as a subscriber server) as a server on the network. The contractor server includes a mobile phone number owned by the viewing contractor, an ID number and password of the viewing contractor, contract information of the viewing contractor (information indicating which broadcast is viewable), and a work key ( Kw) is stored. The contractor server determines whether or not the contractor is based on the telephone number, the ID number, and the password. When the contractor server determines that the contractor is a contractor, the contractor's contract information and work key ( Kw) is transmitted to the mobile phone.

  The mobile phone has a function of accessing a server on the network and receiving information from the server. When the mobile phone accesses the contractor server, for example, a page shown in FIG. 2A is displayed on the screen of the mobile phone. The user inputs a password and an ID number on the screen using a numeric keypad. When the transmission button is operated by the user, the mobile phone transmits the password and the ID number to the contractor server. Then, the mobile phone stores the contract information and the work key (Kw) transmitted from the contractor server in the memory. This mobile phone has an infrared communication function. When the transfer button on the operation screen shown in FIG. 2B is operated, the contract information and the work key (Kw) are converted into an infrared signal and output.

  As described above, the broadcast receiving device 29 receives the infrared signal light output from the mobile phone by the remote control light receiver 11, converts the infrared signal light into an electrical signal, and provides the signal to the CPU 13. The CPU 13 decodes the electric signal to obtain contract information and a work key (Kw) and gives them to the CA module 16. The CA module 16 stores the contract information and the work key (Kw) in the memory of the IC card equivalent unit 16A.

  The above flow is shown in FIG. First, the mobile phone requests the server to transmit contract information and a work key (Kw) (step S1). The server determines whether or not the request is from the contractor (step S2). If the request is from the contractor, the server transmits the contract information and the work key (Kw) to the mobile phone that requested the request (step S3). . The mobile phone receives the contract information and the work key (Kw) (step S4), and transfers the received contract information and the work key (Kw) to the broadcast receiving device 29 (step S5). The broadcast receiving device 29 receives the contract information and the work key (Kw) (step S6), and performs a descrambling process (step S7).

  If the digital broadcast receiving apparatus 29 having the above-described configuration is installed in a hotel or the like on a trip, for example, even if the user does not have an IC card but has a mobile phone, the program that the user subscribes to. Can be viewed using the receiving device 29. In other words, even when a program to be viewed on a contracted channel is broadcast, it is possible to view the contract program on the receiving device 29 at the destination while leaving the IC card for the family.

  The contract information and the work key (Kw) transferred to the broadcast receiving device 29 are received within a limited time (for example, 2 hours or until the checkout time of the hotel) or digital broadcast reception with the mobile terminal. It is maintained only while the connection state with the device 29 is maintained, and is erased after the elapse of time or when the connection state is released. Also, for the mobile terminal side, for example, the contract information and the work key (Kw) are deleted when the information indicating that the contract information and the work key (Kw) are received from the broadcast receiving device 29. .

(Embodiment 2)
Hereinafter, another embodiment of the present invention will be described with reference to FIGS. In the digital broadcasting system shown in FIG. 4, the server 31 connected to the Internet 39 is shown as a constituent element of the digital broadcasting company apparatus 30. However, the present invention is not limited to such a form, and the server 31 exists in another place. The information may be transmitted from the server 31 to the broadcaster apparatus 30. That is, it is not essential that the broadcaster apparatus 30 is connected to the Internet 39.

  The broadcaster apparatus 30 synthesizes the transport stream (TS) sent from the A broadcasting station 36 or the B broadcasting station 37 by the synthesizing unit 33 and uploads it to the satellite (BS) 38 by the modulation / transmission unit 35. Make a link.

  The server 31 stores the telephone number of the mobile phone 40 possessed by the viewing contractor, the ID number and password of the viewing contractor, and the master key (Km) of the viewing contractor. Then, the server 31 determines whether or not it is a contractor based on the telephone number, the ID number, and the password. When it is determined that the server 31 is a contractor, the master key (Km) of the contractor is stored in the mobile terminal. Send. Thereafter, the broadcaster apparatus 30 is requested to transmit an EMM (entitlement management message) of the contractor as individual information. Upon receiving the request, the broadcaster apparatus 30 incorporates the contractor's EMM into the transport stream in section format by the EMM insertion unit 32.

  The digital broadcast receiving device 29 'includes an IC card equivalent unit, similar to the digital broadcast receiving device 29 shown in the first embodiment. This IC card equivalent unit can rewrite the master key (Km) given from the CPU. Can be stored. Then, the cellular phone 40 gives the master key (Km) to the receiving device 29 ′ by infrared communication, and the receiving device 29 ′ stores the received master key (Km) in the IC card equivalent unit.

  As described above, since the contractor's EMM is put on the transport stream by the broadcaster apparatus 30, the receiving apparatus 29 'decrypts the EMM with the master key (Km), and the contract information and work key ( Kw) can be acquired and the descrambling process can be performed.

  The above flow is shown in FIG. First, the mobile phone requests the server 31 to transmit a master key (Km) (step S11). The server 31 determines whether or not it is a request from the contractor (step S12). If the request is from the contractor, the server 31 transmits the master key (Km) to the mobile phone that requested the request (step S13). The mobile phone receives the master key (Km) (step S14), and transfers the received master key (Km) to the broadcast receiving device 29 '(step S15). The broadcast receiving device 29 ′ receives the master key (Km) (step S18). Also, the broadcaster apparatus 30 places the subscriber's EMM on the broadcast radio wave (steps S16 and S17). The broadcast receiving device 29 'receives the digital broadcast wave and acquires the EMM (step S19). The broadcast receiving device 29 ′ decrypts the EMM with the master key (Km), acquires the contract information and the work key (Kw), and performs the descrambling process (step S20).

  The master key (Km) transferred to the broadcast receiving device 29 'is retained for a limited time (for example, 2 hours or until the check-out time of the hotel) and deleted after the time has elapsed. To be. Further, the above processing is performed only when the portable terminal and the digital broadcast receiving device 29 are connected by wire, for example, and the master key (Km) transferred to the broadcast receiving device 29 'is maintained in this connected state. It may be held only for a while, and may be erased when this connection state is released. For the portable terminal, for example, when information indicating that the master key (Km) has been received is received from the broadcast receiving device 29 ', the master key (Km) is deleted.

  Also, a configuration in which the broadcast receiving apparatus has a master key (Km ′) for a portable terminal can be adopted. That is, the master key (Km ′) is transmitted from the broadcast receiving apparatus to the portable terminal in a state where data can be transmitted and received between the portable terminal and the broadcast receiving apparatus. Then, the portable terminal accesses the server and transmits the master key (Km ′) in addition to the ID number described above. The server side has a master key (Km ′) registration table. When the server determines that the received master key (Km ′) is registered and determines that the request is from the contractor based on the ID number or the like, the master key (Km ′) The broadcaster apparatus 30 is requested to transmit the EMM of the contractor (mobile terminal holder) that can be released at (1). With this configuration, since the contractor's master key (Km) is not transferred to the broadcast receiving apparatus, the contractor's master key (Km) can be prevented from being leaked. On the server side, it is possible to know which broadcast receiving apparatus is used by receiving the master key (Km ′). Even in such a configuration, the broadcast receiving apparatus holds the acquired contract information and work key (Kw) only for a limited time or while the connection state between the mobile terminal and the broadcast receiving apparatus is maintained, Delete after the time has elapsed or when the connection is released. Further, the mobile terminal side deletes the master key (Km ′) after transmitting it to the server.

  Further, in the case of a conventional broadcast receiving apparatus, it is necessary to be connected to a telephone line for PPV (Pay per View) or the like, but in the method using the above-described portable terminal, a server using this portable terminal is used. You can access (contract center) to send and receive information. For example, the billing process can be performed by transmitting the program name (or code) of the PPV program to be viewed on the portable terminal to the server (contract center). In addition, a program name (or code) of a PPV program to be viewed on a mobile terminal and a payment procedure for viewing the program may be completed. In addition, it is not always necessary to connect the broadcast receiving device and the portable terminal by infrared communication. The broadcast receiving device and the portable terminal have corresponding connectors and interfaces, and are configured to transmit and receive data by wired connection. May be. Further, data transmission / reception may be performed by connection via a wired / wireless LAN or the like. Moreover, although the mobile phone was illustrated as a portable terminal, not only a mobile phone but PDA etc. can also be utilized.

It is a block diagram which shows the digital broadcast receiver of embodiment of this invention. FIGS. 7A and 7B are explanatory diagrams showing examples of screens displayed on the display of the mobile phone. It is explanatory drawing which showed the viewing method of the contract program. It is explanatory drawing which showed the digital broadcasting system of embodiment of this invention. It is explanatory drawing which showed the viewing method of the contract program.

Explanation of symbols

1 Antenna 2 Tuner 3 Demultiplexer (DEMUX)
4 AV decoder 10 Remote control transmitter 13 CPU
16A IC card equivalent part 29 Digital broadcast receiver 29 'Digital broadcast receiver 30 Broadcaster equipment 31 Server 39 Internet 40 Mobile phone

Claims (6)

A memory that holds the master key, the contract information of the program and the work key in a rewritable manner, and the individual information separated by the demultiplex processing is decrypted by the master key to obtain the contract information and the work key. The decryption unit, the second decryption unit that decrypts the common information separated by the demultiplexing process with the work key, and the decryption result of the second decryption unit and the contract information of the program are compared to determine whether to be viewable Characterized in that it comprises: a key supply unit that supplies a scramble key to a descrambling unit when it is determined that viewing is possible; and means for storing a master key transferred from a portable terminal in the memory Broadcast receiving device. A method for viewing a contract program with a digital broadcast receiver according to claim 1, wherein the mobile terminal accesses the server, and if it is determined that the mobile terminal is a contractor, a master key is sent from the server to the mobile terminal. Transmitting the master key from the portable terminal to the digital broadcast receiver, receiving the request from the server, placing the individual information of the subscriber on the digital broadcast wave, and digital broadcasting Receiving the individual information and decrypting the individual information with the master key to obtain contract information and a work key. A first memory for holding a master key for portable terminal, a second memory for rewritable program contract information and work key, and individual information separated by demultiplex processing for the portable terminal A first decryption unit that decrypts the contract information and the work key by decrypting with the master key, a second decryption unit that decrypts the common information separated by the demultiplexing process with the work key, and a second decryption A key supply unit that supplies a scramble key to the descrambling unit when it is determined that viewing is possible by comparing the decryption result of the unit with the contract information of the program, and for the portable terminal And a means for transferring a master key as a digital broadcast receiving apparatus. A method of viewing a contract program in the digital broadcast receiver according to claim 3, wherein a master key for the portable terminal is transferred to a portable terminal, and the portable terminal accesses a server; It is determined whether or not the master key for the portable terminal transmitted from the portable terminal is valid, and whether the master key for the portable terminal is valid. When the determination is made, a request for transmission of the individual information of the contractor is made from the server, and the individual information of the contractor that can be decrypted with the master key for the portable terminal is received in response to the request from the server. A step of being put on a broadcast wave; and the digital broadcast receiving device receives the individual information, and decrypts the individual information with a master key for the portable terminal. Contract program viewing method, which comprises the steps of obtaining and about information and work key, the. 4. The digital broadcast receiving apparatus according to claim 3, wherein the contract information is held for a limited time or while the connection state between the portable terminal and the digital broadcast receiving apparatus is maintained. A digital broadcast receiver. 2. The digital broadcast receiving apparatus according to claim 1, wherein the master key is held within a limited time or while the connection state between the portable terminal and the digital broadcast receiving apparatus is maintained. A digital broadcast receiver.

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