JP5150550B2 - EMM message delivery system, EMM message delivery method, EMM message delivery program in digital broadcast retransmission - Google Patents

Description

  The present invention provides a relay stage when retransmitting a digital broadcast composed of video, audio, subtitles, data broadcast, PSI (Program Specific Information) / SI (Service Information Information), EMM (Entitlement Management Message), and the like. The present invention relates to a method for enabling automatic display message and mail delivery even when changing to a limited reception system different from the original signal.

  In digital broadcasting, in order to protect the copyrights of content providers and to realize pay broadcasting services, a limited reception method is used in which only specific receivers with viewing authority are allowed to view. Broadcasting originally has the role of transmitting the same information to a large number of people at the same time, but by using a limited reception method, it is possible to limit the reception target and transmit information individually. For example, BS digital broadcasting employs a limited reception system defined in Non-Patent Document 1 (ARIB STD-B25), and has a function of transmitting a message to each receiver individually by using information called an EMM message. Operation is possible.

  In such a message transmission function for each receiver, it may be possible to send only completely different information individually, but for example, it can be transmitted by using a fixed sentence, such as sending notifications about broadcast contents to a limited audience. Efficiency can be increased. For this reason, the EMM message is composed of an EMM common message that is commonly sent to all receivers and an EMM individual message that is individually sent to each receiver.

  The message transmission function is classified into an automatic display message and mail according to the display form. The automatic display message is automatically displayed in a superimpose manner while the program is being viewed, and the mail is selectively displayed for each user as a receiver function independently of the viewing of the program. Whether the information to be transmitted is information for an automatic display message or information for a mail is determined based on header information (protocol number) in the EMM individual message. Note that the EMM individual message can also be transmitted by encrypting the information (see Non-Patent Document 1 (ARIB STD-B25 Version 5.0, Part 1, 3.2.5.2 EMM Individual Message)).

  The automatic display message is not necessarily displayed only after receiving the EMM individual message, but an operation in which the same automatic display message is uniformly displayed in all receivers in the initial state is also assumed. In BS digital broadcasting, a limited reception method is realized using an IC card, and therefore, the same automatic display message display in the initial state can be displayed by embedding information corresponding to the EMM individual message in the IC card in advance. (See Non-Patent Document 2 (ARIB TR-B15 4.4 Edition, Volume 5, 5.15.2 Operation during Grace)).

  The data structure of the CAT (Conditional Access Table) and the conditional access system descriptor used in the present invention is the data structure of the basic information in Non-Patent Document 3 (ARIB STD-B10 4.6 version 2 program arrangement information). (See definition).

"Access Control Method in Digital Broadcasting", ARIB STD-B25 Version 5.0 March 14, 2007, Part 1, 3.2.5.2 EMM Individual Message, pp. 31-pp. 36, 4.7.3 EMM message reception related, pp. 38-58. 145 “BS / Broadband CS Digital Broadcasting Operation Regulations”, ARIB TR-B15 4.4 Edition June 6, 2008, Volume 5, 5.9 EMM, pp. 5-47-pp. 5-49, 5.15.2 Operation of grace period, pp. 5-58 "Program arrangement information used for digital broadcasting", ARIB STD-B10 4.6 edition June 6, 2008, Part 2 Data structure and definition of basic information in program arrangement information 6.2.2 CA identifier descriptor Pp. 99

  When retransmitting digital broadcasts that operate automatic display messages and e-mails, if a limited reception method different from the original limited reception method is adopted, the receiver that receives the retransmission signal does not necessarily support the original limited reception method. Therefore, the EMM individual message encrypted by the original limited reception method cannot be decrypted. For this reason, when retransmitting an EMM message transmitted in the original digital broadcast without any change, it is impossible to receive the automatic display message and the mail in the same manner as the original digital broadcast.

  In addition, in the automatic display message, when the same automatic display message display in the initial state is realized by pre-embedding information corresponding to the EMM individual message in the receiver or IC card, it is difficult to change the information and flexible operation. Cannot change.

  The present invention solves the above-mentioned problems, and the object thereof is to automatically display the same as the conventional one even when a limited reception system different from the original signal is used when retransmitting a digital broadcast that performs EMM message operation. To provide an EMM message delivery system, method, and program for digital broadcast retransmission that enables operation of messages and mails and enables flexible operation change of the same automatic display message display in the initial state. is there.

  The present invention retransmits a digital broadcasting TS (Transport Stream: a multiplexed signal format defined in MPEG-2 Systems) composed of video, audio, subtitles, data broadcasting, PSI / SI, EMM messages, and the like. In the case of adopting a different conditional access system, the EMM individual message in the original broadcast signal is deleted at the relay stage, and a new EMM individual message corresponding to the conditional access system used after re-transmission is newly generated and added.

  At this time, the EMM individual message confirms the content of the EMM common message included in the original broadcast signal in advance, and performs operation according to the content. The EMM individual message generated and added at the time of retransmission can be operated only in plain text without being encrypted, or can be encrypted with a key corresponding to the limited reception method used after retransmission. Note that the values of table_id and table_id_extension are defined as the same values on the transmitting side and the receiving side, respectively, as indicating information for determining that the message is an EMM individual message.

  Note that the EMM individual message corresponding to the conditional access method used after retransmission may differ in the size of CAS (Conditional Access System) client identification from the EMM individual message in the broadcast signal due to differences in the conditional access method. By transmitting and using the same information as information for realizing the automatic display message and mail, the automatic display message and mail can be realized by the same processing. The data structure of the EMM individual message used in the present invention is shown in FIGS. 10 is defined in ARIB STD-B25 of Non-Patent Document 2.

  Also, the CA_system_ID of the descriptor arranged in the CAT (Conditional Access Table) that transmits PID (Packet Identification: identification number for identifying each information from the TS) necessary for specifying the EMM message is retransmitted. Rewrite to the value of the conditional access method used later. FIG. 11 shows the data structure of the CAT used in the present invention, and FIG. 12 shows the data structure of the conditional access system descriptor and the CA service descriptor.

  The data structure of the CAT in FIG. 11 is defined in ARIB STD-B10 of Non-Patent Document 3. 12A is defined in ARIB STD-B10 of Non-Patent Document 3, and the CA service descriptor in FIG. 12B is defined in ARIB STD-B25 of Non-Patent Document 2. ing.

  In addition, when displaying the same automatic display message in the initial state, not only the information equivalent to the EMM individual message for the automatic display message for the receiver to display in the initial state is embedded in advance, but the information is initialized Deliver so that it can be acquired and set as default message information at the time of setting. Default message information defines information equivalent to an EMM individual message in an XML (Extensible Markup Language) format, and is delivered by HTTP (Hypertext Transfer Protocol) or HTTPS (Hypertext Transfer Protocol). An EMM individual message addressed to a special CAS client identification having a data structure similar to that of the message (for example, CAS client identification addressed to all bit strings 0) is defined as an EMM individual message for all receivers on the transmission side and reception side, Distribution in the same manner as a normal EMM message is also conceivable.

  The receiver acquires and retains default message information by either method at the time of initial setting, and the automatic display message in the initial state (in the state where the EMM individual message addressed to its own CAS client identification has never been received). Used for display. In this case, it is not always necessary to distribute all the information of the EMM individual message as default message information, and other than the information to be distributed, the values determined in advance on the receiver side are arranged. Can be performed. An example of default message information defined in the XML format used in the present invention is shown in FIG.

An EMM message distribution system for digital broadcast retransmission according to the present invention is an EMM message distribution system for digital broadcast retransmission that includes a transmission side device and a reception side device and transmits a digital broadcast via a first network.
The sending device is:
For the CA_system_ID of the descriptor arranged in the CAT (Conditional Access Table), there is a first setting means in which the original conditional access system identification value and the conditional access system identification value used after retransmission are set, With TS (transport stream) obtained by receiving digital broadcast waves or playing program content as input,
When the CA_system_ID of the conditional access method descriptor in the CAT included in the input TS is the original conditional access method identification value set in the first setting means, CA_PID is output as a notification signal, and the CA_system_ID of the conditional access method descriptor in the CAT and the CA service descriptor included in the TS is the original conditional access method identification value set in the first setting means. In some cases, the CAT editing that rewrites the CA_system_ID of the conditional access system descriptor and CA service descriptor to the value of the conditional access system identification used after retransmission set in the first setting means, and outputs the TS Means,
EMM (Entitlement Management Message) has a first storage means for storing a monitoring target PID for specifying an individual message, and receives a TS and a notification signal from the CAT editing means, and from the input TS, An EMM individual message deletion unit that deletes the EMM individual message specified by the monitoring target PID stored in the first storage unit and outputs the TS;
An EMM individual message TS packet generating / accumulating means for generating / accumulating an EMM individual message TS packet to be used after re-transmission; and a second storage means for storing a PID for multiplexing the EMM individual message. The TS from the individual message deletion unit and the notification signal from the CAT editing unit are input, and the TS packet of the EMM individual message stored in the individual information TS generation / storage unit is input to the input TS. EMM individual message adding means for multiplexing with the PID stored in the second storage means and outputting the TS,
Sending TS output from the EMM individual message adding means to the first network;
The receiving side device
The CA_system_ID of the descriptor arranged in the CAT has a second setting unit in which the value of the conditional access method identification used after retransmission is set, and is sent from the sending side device via the first network. The TS that received the TS is input,
If the CA_system_ID of the conditional access method descriptor in the CAT included in the input TS is a conditional access method identification value used after retransmission set in the second setting means, the conditional access method description When the child CA_PID is output and the CA_system_ID of the CA service descriptor in the CAT included in the input TS is the value of the conditional access system identification value used after the retransmission set in the second setting means CAT processing means for outputting information (business entity identification, grace period, service identification) in the CA service descriptor,
EMM message processing and display control are performed based on the TS output from the CAT processing means, CA_PID in the conditional access system descriptor, and information in the CA service descriptor.

(1) According to the first to fifth aspects of the present invention, even when a different conditional access system is used when retransmitting a digital broadcast that performs EMM message operation, an automatic display message and mail equivalent to the conventional ones are used. Operation can be made possible.
(2) According to the second and fourth aspects of the invention, when distributing a digital broadcast that performs EMM message operation, it is possible to flexibly change the same automatic display message display in the initial state.

The functional block diagram of the embodiment of this invention. The flowchart which shows the process in the CAT edit function of this invention. The flowchart which shows the process in the EMM individual message deletion function of this invention. The flowchart which shows the process in the EMM individual message addition function of this invention. The flowchart which shows the process in the initial connection function of this invention. The flowchart which shows the process in the CAT processing function of this invention. 1 is a system configuration diagram of Embodiment 1 of the present invention. The system block diagram of Example 2 of this invention. Explanatory drawing which shows the data structure of the EMM individual message utilized by this invention. Explanatory drawing which shows the data structure of the EMM individual message utilized by this invention. Explanatory drawing which shows the data structure of CAT utilized by this invention. Explanatory drawing which shows the data structure of the descriptor utilized by this invention. Explanatory drawing which shows the structure of the default message information utilized by this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

  FIG. 1 shows a functional block diagram of the entire EMM message distribution system in digital broadcast retransmission according to this embodiment. In FIG. 1, reference numeral 100 denotes a sending side device, 200 denotes a receiving side device, and 300 denotes a digital broadcast network / IP network (first network) connecting the sending side device 100 and the receiving side device 200.

  Reference numeral 500 denotes a default message information server that is provided outside the sending apparatus 100 and provides default message information to the receiving apparatus 200 via the IP network (second network) 400. Reference numeral 501 denotes default message information stored in the server 500.

  Reference numeral 101 in the sending apparatus 100 denotes program content, and reference numeral 102 denotes a playback function of playback means for playing back the program content 101. Reference numeral 103 denotes an antenna that receives a broadcast wave, and reference numeral 104 denotes a tuner that converts the broadcast wave received by the antenna 103 into a digital signal.

  The CA_system_ID of the conditional access method descriptor in the CAT included in the TS input from the playback function 102 or the tuner 104 is the original conditional access method identification value set in the setting value 106 of the first setting means. In this case, the CA_PID in the conditional access method descriptor is output as a notification signal, and the conditional access method descriptor in the CAT included in the TS and the CA_system_ID of the CA service descriptor are set in the setting value 106. And the CA_system_ID of the conditional access system descriptor and the CA service descriptor are rewritten to the conditional access system identification value used after retransmission set in the setting value 106. A CAT editing function for performing CAT editing means for outputting TS is shown.

  107 receives an TS and a notification signal from the CAT editing function 105, and from the input TS, the EMM individual message specified by the monitoring target PID stored in the storage unit 108 as the first storage unit And an EMM individual message deletion function for performing EMM individual message deletion means for outputting the TS.

  Reference numeral 108 denotes a storage unit as a first storage unit in which a monitoring target PID for specifying an EMM individual message is stored.

  109 receives the TS from the EMM individual message deletion function 107 and the notification signal from the CAT editing function 105 as input, and the individual information TS110 stored in the individual information TS generating / accumulating means for the input TS. Is an EMM individual message addition function for performing EMM individual message addition means for outputting the TS by multiplexing with the PID stored in the storage unit 111 as the second storage means.

  Reference numeral 110 denotes the individual information TS of the individual information TS generating / accumulating means for generating / accumulating the individual information TS in which the TS packet of the EMM individual message and the PCR (Program Clock reference) used after the retransmission are multiplexed.

  Reference numeral 111 denotes a storage unit as a second storage unit that stores a PID for multiplexing EMM individual messages.

  Reference numeral 112 denotes a TS transmission function for performing TS transmission means for transmitting the TS transmitted from the EMM individual message addition function 109 to the digital broadcast network / IP network 300.

  Reference numeral 201 in the receiving apparatus 200 indicates a receiving function of a receiving unit that receives a TS transmitted from the digital broadcast network / IP network 300.

  202, when the CA_system_ID of the conditional access method descriptor in the CAT included in the input TS is a conditional access method identification value used after retransmission set in the setting value 203 of the second setting means The CA_PID in the conditional access system descriptor is output, and the CA_system_ID of the CA service descriptor in the CAT included in the input TS is used for the conditional access system identification used after the retransmission set in the setting value 203. In the case of a value, the CAT processing function performed by the CAT processing means for outputting information in the CA service descriptor is shown.

  Reference numeral 203 denotes the setting value of the second setting means in which the conditional access method identification value used after retransmission is set for the CA_system_ID of the descriptor arranged in the CAT.

  204 receives the TS from the CAT processing function 202 and the CA_PID in the conditional access method descriptor as input, identifies the EMM individual message in the TS, and transmits the message to the automatic display message control function 210 or the mail control function 212. The EMM individual message processing function which performs an EMM individual message processing means which performs a process and the process which outputs TS to the EMM common message processing function 206 is shown.

  Reference numeral 205 denotes a setting value of a setting unit in which a value corresponding to its own CAS client identification that is unique for each receiver is set.

  207 is connected to the default message information server 500 when receiving an instruction to acquire default message information from the outside, acquires default message information, information set in the setting value 208 of the third setting means, and 3 shows an initial connection function performed by the initial connection unit that generates an EMM individual message based on the default message information stored in the storage unit 209 serving as a storage unit 3 and outputs it to the automatic display message control function 210.

  210 receives an EMM individual message for an automatic display message from the initial connection function 207 and the EMM individual message processing function 204, and saves and manages one message in the storage unit 211 for each business entity identification. An automatic display message function for performing message control means is shown.

  The automatic display message control function 210 receives the EMM common message from the EMM common message processing function 206, generates an automatic display message in combination with the EMM individual message stored in the storage unit 211, and further performs the CAT processing. The information of the CA service descriptor from the function 202 is received and various display controls described later are performed.

  Reference numeral 212 denotes a mail control function performed by mail control means that receives an EMM individual message for mail from the EMM individual message processing function 204 and stores and manages it in the storage unit 213.

  The mail control function 212 receives the EMM common message from the EMM common message processing function 206, generates a mail in combination with the message stored in the storage unit 213, and displays it according to the operation of the viewer. .

  Reference numeral 214 denotes a playback function of playback means for playing back the TS input from the reception function 201 and displaying the screen.

  Next, a processing flow for each functional block of the transmission side apparatus 100 will be described.

  The playback function 102 plays back the program content 101 and outputs a TS to the CAT editing function 105. Alternatively, the antenna 103 receives a broadcast wave and outputs the broadcast wave to the tuner 104. The tuner 104 converts the input broadcast wave into a digital signal and outputs the digital signal to the CAT editing function 105 as a TS.

  In the CAT editing function 105, the CA_system_ID of the conditional access method descriptor in the CAT and the CA service descriptor included in the input TS was the original conditional access method identification value set in advance in the setting value 106. In this case, the conditional access method identification value used after re-transmission set in advance in the setting value 106 is rewritten (overwritten), and the CA_PID of the conditional access method descriptor is used as an EMM message specifying PID as an EMM. Processing for notifying the individual message deletion function 107 and the EMM individual message addition function 109 and output processing of the TS to the EMM individual message deletion function 107 are performed.

  When the descriptor in the CAT is edited, CRC (Cyclic Redundancy Check) error detection recalculation is performed and the CRC_32 in the CAT is overwritten.

  An example of the processing flow of the CAT editing function 105 will be described with reference to FIG. In the flowcharts of FIGS. 2 to 6 described below, “S” indicates each processing step.

  S501: The TS is input from the playback function 102 or the tuner 104, and the process proceeds to S502.

  S502: When the CAT of the TS input in S501 is read and it is detected that a conditional access system descriptor having the original conditional access system identification value in which CA_system_ID is set to the setting value 106 is arranged If not, the process proceeds to S503. Otherwise, the process proceeds to S505.

  S503: The CA_PID (PID for specifying the EMM message) in the CAT conditional access method descriptor detected in S502 is passed to the EMM individual message deletion function 107 and the EMM individual message addition function 109, and the process proceeds to S504.

  S504: The CA_system_ID in the CAT conditional access system descriptor detected in S502 is rewritten to the conditional access system identification value used after retransmission set in the set value (106), and the process proceeds to S505.

  S505: When the CAT of the TS input in S501 is read and it is detected that the CA service descriptor having the original conditional access system identification value in which the CA_system_ID is set to the setting value 106 is arranged. Advances to S506, otherwise advances to S507.

  S506: The CA_system_ID in the CA service descriptor of the CAT detected in S505 is rewritten with the conditional access system identification value used after retransmission set in the set value 106, and the process proceeds to S507.

  S507: The TS is output to the EMM individual message deletion function 107.

  In the EMM individual message deletion function 107, the TS packet transmitted by the monitoring target PID set in the storage unit 108 is read, the EMM individual message in the TS input from the CAT editing function 105 is specified, and the EMM individual message Deletion is performed, and output processing to the EMM individual message addition function 109 of the TS is performed.

  Deletion of an EMM individual message is performed, for example, by a process of replacing a TS packet that transmits an EMM individual message with a NULL packet (a dummy packet that does not include data with a PID of 0x1FFF). In the storage unit 108, a monitoring target PID for specifying an EMM individual message is set manually and statically in advance. When the PID (CA_PID) for specifying the EMM message is notified from the CAT editing function 105, it is possible to overwrite the monitoring target PID for specifying the EMM individual message preset in the storage unit 108. . Also, since the EMM (individual information) is transmitted with the same PID as the PID to which the EMM message is transmitted, it is also possible to delete the EMM (individual information) at the same time when deleting the EMM individual message with this function. . An example of the processing flow of the EMM individual message deletion function 107 will be described with reference to FIG.

  S601: Receive TS input from the CAT editing function 105, and proceed to S602.

  S602: The TS packet of the monitoring target PID set in the storage unit 108 of the TS input in S601 is read, and if it is detected that an EMM individual message is arranged, the process proceeds to S603. Otherwise, the process proceeds to S604. Proceed to

  S603: Replace the TS packet of the EMM individual message detected in S602 with a NULL packet, and proceed to S604.

  S604: The TS is output to the EMM individual message addition function 109.

  In the EMM individual message addition function 109, the TS input from the EMM individual message deletion function 107 is a TS that is multiplexed with an EMM individual message that is generated and stored in advance as the individual information TS110 and used after re-transmission and a PCR that will be described later. Then, multiplexing is performed with the PID when multiplexing the EMM individual message set in the storage unit 111, and output processing to the TS transmission function 112 is performed.

  The multiplexing of TS means that, for example, a TS packet that is not required by a receiver such as a NULL packet is converted into a TS packet of an EMM individual message stored as individual information TS110, and an EMM individual message set in the storage unit 111 is used. This process is performed by setting and replacing the PID for multiplexing. In the storage unit 111, the PID for multiplexing the EMM individual message is manually and statically set in advance.

  When the PID for specifying the EMM message is notified from the CAT editing function 105, the PID when multiplexing the EMM individual message preset in the storage unit 111 can be overwritten. In the individual information TS110, not only the information of the TS packet of the EMM individual message of re-transmission credit, but also the PCR (Program Clock reference) as in the TS input from the EMM individual message deletion function 107 is multiplexed. In addition, by sequentially reading out each TS packet, it is possible to acquire the timing at which the packets should be arranged. EMM individual message deletion function when the individual information TS110 is read while referring to the PCR and the TS packet of each EMM individual message is arranged (when the timing to arrange the TS packet of each EMM individual message comes) Replacement with a NULL packet in TS input from 107 is performed. The individual information TS110 does not necessarily have to be stored in advance, and may be transmitted and input from another server in real time. A processing flow example of the EMM individual message addition function 109 will be described with reference to FIG.

  S701: Receive TS input from EMM individual message deletion function 107, and proceed to S402.

  S702: The individual information TS110 is read according to the PCR change of the TS input from the EMM individual message deletion function 107, whether or not there is a TS packet to be arranged, and the TS of the EMM individual message at the timing to be arranged. If there is a packet, the process proceeds to S703, and if not, the process proceeds to S704.

  S703: PID for multiplexing the EMM individual message set in the storage unit 111 into the TS packet of the EMM individual message at the timing to be arranged in the individual information TS110 from the TS NULL packet input in S701 Is set and replaced, and the process proceeds to S704.

  S704: The TS is output to the TS transmission function 112.

  The TS transmission function 112 outputs the input TS to the digital broadcast network / IP network 300.

  Next, a processing flow for each functional block of the reception-side apparatus 200 will be described.

  When a default message information acquisition instruction is issued from the outside to the initial connection function 207 by manual execution by a user operation or automatic execution at the time of initial reception device reception, the initial connection function 207 is preliminarily transmitted via the IP network 400 in advance. The default message information 501 is obtained by connecting to the default message information server 500 with a communication protocol such as HTTPS using the URI set in the setting value 208, and stored in the storage unit 209. Using this stored default message information 501, an EMM individual message is generated and output to the automatic display message control function 210.

  When the default message information 501 does not contain all information corresponding to each item of the data structure of the EMM individual message, it corresponds to each item of the data structure of the EMM individual message preset in the setting value 208. An EMM individual message can be generated instead of the value. Note that the default message information is not necessarily acquired via the IP network 400, and may be distributed in a multiplexed form from the TS transmission function 112 of the transmission side apparatus 100 to the TS. A processing flow example of the initial connection function 207 will be described with reference to FIG.

  S1101: A default message information acquisition instruction is received in response to a user operation or the like, and the process proceeds to S1102.

  S1102: It is confirmed whether the default message information 501 is already stored in the storage unit 209. If it is not stored, the process proceeds to S1103, and if not, the process proceeds to S1105.

  S1103: Connect to the URI of the default message information server 500 set in the setting value 208 by HTTPS, obtain the default message information 501, and proceed to S1104.

  S1104: The default message information 501 acquired in S1103 is stored in the storage unit 209, and the process proceeds to S1105.

  S1105: Overwriting the information corresponding to each item in the default message information 501 stored in the storage unit 209 in S1104 to the value corresponding to each item of the data structure of the EMM individual message set in the setting value 208. Generates an EMM individual message and outputs it to the automatic display message control function 210.

  S1106: Notifying the user that the acquisition of default message information has been completed by screen display or the like.

  The reception function 201 receives a TS from the digital broadcast network / IP network 300 and outputs it to the CAT processing function 202 and the reproduction function 214.

  In the CAT processing function 202, the CA_system_ID of the conditional access system descriptor in the CAT included in the TS input from the reception function 201 is the corresponding conditional access system identification value (retransmission set in advance in the setting value 203). And a process for notifying the EMM individual message processing function 204 and the EMM common message processing function 206 of the CA_PID of the conditional access system descriptor as a PID for specifying the EMM message. , The output process to the EMM individual message processing function 204 of the TS is performed. A processing flow example of the CAT processing function 202 will be described with reference to FIG.

  S801: A TS is received from the reception function 201, and the process proceeds to S802.

  S802: The CAT in the TS input in S801 is read, and a conditional access system descriptor in which the CA_system_ID is the value of the conditional access system identification used after the retransmission set in advance in the setting value 203 is arranged. If this is detected, the process proceeds to S803, and if not, the process proceeds to S804.

  S803: CA_PID (PID for specifying the EMM message) in the CAT conditional access method descriptor detected in S802 is passed to the EMM individual message processing function 204 and the EMM common message processing function 206, and the process proceeds to S804.

  S804: The CAT in the TS input in S801 is read, and the CA service descriptor that is the conditional access system identification value used after the retransmission in which the CA_system_ID is set to the setting value 203 in advance is arranged. If detected, the process proceeds to S805, and if not, the process proceeds to S806.

  S805: Information (business entity identification, grace period, service identification) in the CA service descriptor of the CAT detected in S804 is transferred to the automatic display message control function 210, and the process proceeds to S806.

  S806: The TS is output to the EMM individual message processing function 204.

The EMM individual message processing function 204 reads the TS packet input by the TS input from the CAT processing function 202 and the PID for specifying the EMM message, specifies the EMM individual message in the TS, and specifies the EMM individual message in the EMM individual message. A value indicating that the message control in the EMM individual message is for the automatic display message when the CAS client identification is equal to its corresponding value (the value of the CAS client identification set in advance in the setting value 205). In the case (when the value is 0 _X 01), the automatic display message control function 210 has a value indicating that the message control in the EMM individual message is for mail (when the value is 0 _X 02). ) Transmits each received EMM individual message to the mail control function 211. And processing, the output processing of the EMM common message processing function 206 of the TS performed.

  The EMM common message processing function 206 reads the TS input from the EMM individual message processing function 204 and the TS packet transmitted by the PID for specifying the EMM message input from the CAT processing function 202, and specifies the EMM common message. Then, a process of transmitting the received EMM common message to both the automatic display message control function 210 and the mail control function 212 is performed.

  The automatic display message control function 210 receives the EMM individual message for the automatic display message from the initial connection function 207 and the EMM individual message processing function 204 and stores one message in the storage unit 211 for each business entity identification. When new information is acquired when the EMM individual message is already stored and exists in the storage unit 211, the EMM individual message is automatically displayed for each business entity identification as an automatic display message to be displayed by overwriting the original information. Only one is managed. In addition, the EMM common message processing function 206 receives the EMM common message and combines it with the EMM individual message stored in the storage unit 211 to generate an automatic display message. The impose display is performed. The CA service descriptor information is received from the CAT processing function 202, and the necessity of automatic display message display for each service is controlled using the CA service descriptor information.

  The mail control function 212 receives the EMM individual message for mail from the EMM individual message processing function 204 and stores it in the storage unit 213. At this time, it is assumed that a plurality of EMM individual messages are stored, but when the maximum number of storable messages is exceeded, the oldest ones are deleted and the newly received ones are preferentially stored. In addition, the EMM common message processing function 206 receives the EMM common message and combines it with the message stored in the storage unit 213 to generate a mail and display it according to the operation of the viewer.

  The reproduction function 214 reproduces the TS input from the reception function 201 and displays the screen.

  As a result, when retransmitting a digital broadcast that uses EMM messages, automatic display messages and mails can be operated in the same manner as before even when different conditional access systems are used.

  Further, in the automatic display message operation in digital broadcasting, it is possible to flexibly change the operation of the same automatic display message display in the initial state.

  Next, even in the case of using a different conditional access method when retransmitting a digital broadcast that performs EMM message operation in simultaneous IP retransmission or pre-stored IP retransmission, automatic display messages and mails equivalent to the conventional ones are used. An embodiment of the present invention will be described in which the same automatic display message display in the initial state can be flexibly changed.

Example 1
When the present invention is used for simultaneous IP retransmission, as shown in FIG. 7, the broadcast station equipment 901, digital broadcast wave 902, IP transmission server 903, multicast stream 904, receiver 905, and default message information server 906 are configured. Is done.

  The broadcasting station facility 901 has a function of sending a digital broadcast wave 902 including a broadcast program. The IP transmission server 903 includes the transmission side device 100 of FIG. 1 and has a function of receiving a digital broadcast wave 902, converting the digital broadcast wave 902 into a multicast stream 904, and transmitting the multicast stream 904. The receiver 905 includes the receiving-side device 200 of FIG. 1, receives a multicast stream 904, plays and displays it, and from a default message information server 906 configured in the same manner as the default message information server 500 of FIG. It has a function that can acquire default message information.

Hereinafter, the operation of the system in the present embodiment in simultaneous IP retransmission will be described.
(1) A digital broadcast wave 902 carrying broadcast program information is sent from the broadcast station equipment 901.
(2) The IP transmission server 903 receives the broadcast wave 902, performs the processing of the transmission side device 100 described in FIG. 1, converts it into a multicast stream 904, and transmits it. That is, the CAT is edited, the EMM individual message in the original broadcast signal is deleted, and an EMM individual message corresponding to the limited reception method used after re-transmission is newly added and transmitted.
(3) The receiver 905 acquires default message information from the default message information server 906 at the time of initial setting, receives the multicast stream 904 from the IP transmission server 903, performs the processing of the receiving side apparatus 200 described in FIG. Automatic display message and mail display.

(Example 2)
When the present invention is used for pre-storage type IP retransmission, as shown in FIG. 8, the IP transmission server 1001, the multicast stream 1002, the receiver 1003, and the default message information server 1004 are configured.

  The IP transmission server 1001 includes the transmission-side apparatus 100 of FIG. 1 and has a function of converting a TS accumulated in advance into a multicast stream 1002 and transmitting it. The receiver 1003 includes the receiving-side device 200 of FIG. 1, receives a multicast stream 1002, and reproduces / displays it. In addition, the receiver 1003 includes a default message information server 1004 configured similarly to the default message information server 500 of FIG. It has a function that can acquire default message information.

Hereinafter, the system operation in the present embodiment in the pre-storage type IP retransmission will be described.
(1) The IP transmission server 1001 performs the processing of the transmission side apparatus 100 described in FIG. 1 on the TS accumulated in advance, converts it into a multicast stream 1002, and transmits it. That is, the CAT is edited, the EMM individual message in the original broadcast signal is deleted, and an EMM individual message corresponding to the limited reception method used after re-transmission is newly added and transmitted.
(2) The receiver 1003 acquires default message information from the default message information server 1004 at the time of initial setting, receives the multicast stream 1002 from the IP transmission server 1001, performs the processing of the receiving side apparatus 200 described in FIG. Automatic display message and mail display.

  In addition, some or all of the functions of each means in the EMM message distribution system in digital broadcast retransmission according to the present embodiment are configured by a computer program, and the program is executed using the computer to realize the present invention. Needless to say, the procedure in the EMM message delivery method in the digital broadcast retransmission according to the present embodiment can be configured by a computer program, and the program can be executed by the computer. , A computer-readable recording medium such as FD (Floppy (registered trademark) Disk), MO (Magneto-Optical disk), ROM (Read Only Memory), memory card, CD ( ompact Disk) -ROM, DVD (Digital Versatile Disk) -ROM, and record CD-R, CD-RW, HDD, such as a removable disk, or stored, it is possible to or distribute. It is also possible to provide the above program through a network such as the Internet or electronic mail.

DESCRIPTION OF SYMBOLS 100 ... Sending side apparatus 101 ... Program content 102 ... Playback function 103 ... Antenna 104 ... Tuner 105 ... CAT edit function 106,203,205,208 ... Set value 107 ... EMM individual message deletion function 108,111,209,211,213 ... Storage unit 109 ... EMM individual message addition function 110 ... Individual information TS
DESCRIPTION OF SYMBOLS 112 ... TS transmission function 200 ... Reception side device 201 ... Reception function 202 ... CAT processing function 204 ... EMM individual message processing function 206 ... EMM common message processing function 207 ... Initial connection function 210 ... Automatic display message control function 212 ... Mail control function DESCRIPTION OF SYMBOLS 300 ... Digital broadcasting network / IP network 400 ... IP network 500,906,1004 ... Default message information server 903,1001 ... IP transmission server 904,1002 ... Multicast stream 905,1003 ... Receiver

Claims (5)

An EMM message distribution system in digital broadcast retransmission that includes a transmission side device and a reception side device and transmits a digital broadcast via a first network,
The sending device is:
For the CA_system_ID of the descriptor arranged in the CAT (Conditional Access Table), there is a first setting means in which the original conditional access system identification value and the conditional access system identification value used after retransmission are set, With TS (transport stream) obtained by receiving digital broadcast waves or playing program content as input,
When the CA_system_ID of the conditional access method descriptor in the CAT included in the input TS is the original conditional access method identification value set in the first setting means, CA_PID is output as a notification signal, and the CA_system_ID of the conditional access method descriptor in the CAT and the CA service descriptor included in the TS is the original conditional access method identification value set in the first setting means. In some cases, the CAT editing that rewrites the CA_system_ID of the conditional access system descriptor and CA service descriptor to the value of the conditional access system identification used after retransmission set in the first setting means, and outputs the TS Means,
EMM (Entitlement Management Message) has a first storage means for storing a monitoring target PID for specifying an individual message, and receives a TS and a notification signal from the CAT editing means, and from the input TS, An EMM individual message deletion unit that deletes the EMM individual message specified by the monitoring target PID stored in the first storage unit and outputs the TS;
An EMM individual message TS packet generating / accumulating means for generating / accumulating an EMM individual message TS packet to be used after re-transmission; and a second storage means for storing a PID for multiplexing the EMM individual message. The TS from the individual message deletion unit and the notification signal from the CAT editing unit are input, and the TS packet of the EMM individual message stored in the individual information TS generation / storage unit is input to the input TS. EMM individual message adding means for multiplexing with the PID stored in the second storage means and outputting the TS,
Sending TS output from the EMM individual message adding means to the first network;
The receiving side device
The CA_system_ID of the descriptor arranged in the CAT has a second setting unit in which the value of the conditional access method identification used after retransmission is set, and is sent from the sending side device via the first network. The TS that received the TS is input,
If the CA_system_ID of the conditional access method descriptor in the CAT included in the input TS is a conditional access method identification value used after retransmission set in the second setting means, the conditional access method description When the child CA_PID is output and the CA_system_ID of the CA service descriptor in the CAT included in the input TS is the value of the conditional access system identification value used after the retransmission set in the second setting means CAT processing means for outputting information (business entity identification, grace period, service identification) in the CA service descriptor,
EMM message in digital broadcast retransmission characterized in that EMM message processing and display control are performed based on TS output from said CAT processing means, CA_PID in conditional access system descriptor, and information in CA service descriptor Distribution system. A default message information server that provides default message information to the receiving device via a second network is provided outside the sending device,
The receiving-side apparatus stores connection information for connecting to the default message information server, third setting means in which values corresponding to the items of the data structure of the EMM individual message are set, and a first setting means for storing default message information. And an initial connection means for obtaining default message information and generating an EMM individual message based on the information when receiving an instruction to obtain default message information from the outside. The EMM message delivery system in digital broadcast re-transmission according to claim 1. CAT processing means from a sending side device comprising CAT editing means, EMM individual message deletion means and EMM individual message addition means for receiving TS (transport stream) obtained by receiving digital broadcast waves or reproducing program contents An EMM message delivery method in digital broadcast retransmission for transmitting a digital broadcast via a first network to a receiving side device comprising:
In the CAT editing means of the sending side device, the original conditional access system identification value and the conditional access system identification value used after retransmission are set for the CA_system_ID of the descriptor arranged in the CAT (Conditional Access Table). First setting means,
When the CA_system_ID of the conditional access system descriptor in the CAT included in the input TS is the original conditional access system identification value set in the first setting means, the CAT editing means The CA_PID in the conditional access system descriptor is output as a notification signal, and the conditional access system descriptor in the CAT included in the TS and the CA_system_ID in the CA service descriptor are the original restrictions set in the first setting means. When the value is the reception method identification value, the CA_system_ID of the conditional access method descriptor and the CA service descriptor is rewritten to the conditional reception method identification value used after retransmission set in the first setting unit, Outputting TS, and
The EMM individual message deletion means has a first storage means for storing a monitoring target PID for specifying an EMM (Entitlement Management Message) individual message, and receives a TS and a notification signal from the CAT editing means as inputs. ,
The EMM individual message deleting means deleting the EMM individual message specified by the monitoring target PID stored in the first storage means from the input TS, and outputting the TS;
The EMM individual message adding means stores individual information TS generating / accumulating means for generating / accumulating TS packets of EMM individual messages to be used after re-transmission, and a second PID for storing EMM individual messages. Having a storage means, with the TS from the EMM individual message deletion means and the notification signal from the CAT editing means as inputs,
The EMM individual message adding means multiplexes the TS packet of the EMM individual message stored in the individual information TS generating / accumulating means with the PID stored in the second storage means for the input TS. And outputting the TS;
The sending side device sending the TS output from the EMM individual message adding means to the first network;
The CAT processing means of the receiving side device has second setting means in which a conditional access system identification value used after retransmission is set for the CA_system_ID of the descriptor arranged in the CAT, and the first network The TS that has received the TS sent from the sending side device via is input,
When the CA_system_ID of the conditional access system descriptor in the CAT included in the input TS is the conditional access system identification value used after the retransmission set in the second setting means, by the CAT processing means. Performing a process of outputting CA_PID in the conditional access system descriptor;
When the CA_system_ID of the CA service descriptor in the CAT included in the input TS is the value of the conditional access method identification used after the retransmission set in the second setting means, A step of outputting the information of
Outputting the processed TS;
The receiving side device includes a step of performing EMM message processing and display control based on the TS output from the CAT processing means, CA_PID in the conditional access method descriptor, and information in the CA service descriptor. An EMM message delivery method in digital broadcast retransmission characterized by the above. A default message information server that provides default message information to the receiving device via a second network is provided outside the sending device,
The receiving-side apparatus stores connection information for connecting to the default message information server, third setting means in which values corresponding to the items of the data structure of the EMM individual message are set, and a first setting means for storing default message information. An initial connection means having three storage means,
The connection information set in the third setting means when the initial connection means receives the default message information acquisition instruction from the outside, and the default message information is not held in the third storage means. Connecting to the default message information server by using and obtaining default message information;
Holding the acquired default message information in the third storage means;
Overwrite the information corresponding to each item in the default message information stored in the third storage means to the value corresponding to each item of the data structure of the EMM individual message set in the third setting means. The EMM message delivery method in the digital broadcast retransmission according to claim 3, further comprising: generating an EMM individual message. An EMM message delivery program in digital broadcast retransmission, which causes a computer to function as each means according to claim 1 or 2.

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