JP4921530B2 - EMM message re-multiplexing device, EMM message re-multiplexing method, EMM message re-multiplexing program for realizing automatic display message at the time of IP retransmission of digital broadcasting - Google Patents

Description

  The present invention relates to a mechanism for attracting viewers to pay broadcasting contracts provided as automatic display messages in digital broadcasting that performs pay broadcasting, using an IP (Internet Protocol) network. The present invention relates to an apparatus and a method for enabling transmission of a signal in a form that can be used by a general receiving apparatus when performing transmission (hereinafter referred to as IP retransmission).

  In digital broadcasting, as a limited receiving system for pay broadcasting, as shown in FIG. 1, a mechanism called an automatic display message is used. This is a mechanism that can display a message prompting the contract to the viewer in the form of a superimpose on the screen when a non-subscriber views the pay broadcast.

  The mechanism of the automatic broadcast wave display message is described.

  As shown in FIG. 2, the automatic display message is realized by using an EMM message which is a signal included in an MPEG2-transport stream (hereinafter referred to as TS) included in a broadcast wave. FIG. 2 shows the overall structure of MPEG2-TS.

The EMM message includes an EMM common message and an EMM individual message. The automatic display message is realized by combining these two.
The sending device installed in the broadcasting station includes a set of the message content to be displayed on the screen output by the receiving device used by the viewer and the fixed sentence number corresponding to this message in the EMM common message. Multiple items are sent out.

  Also, the sending device sends the EMM individual message as a set of the identifier of the receiving device that is different for each receiving device, the fixed message number of the message to be displayed, and the difference message from the fixed message. These EMM messages are multiplexed together with video and audio signals, and sent as TS from a sending device installed in the broadcasting station.

  The receiving apparatus that has received these signals extracts the EMM message from the TS, and reads whether the EMM individual message is addressed to the receiver using the identifier of the receiving apparatus described in the EMM individual message. Further, when the EMM individual message is addressed to the receiving device, the receiving device extracts the fixed message number and the difference message described in the EMM individual message, and from the fixed message number and the message content described in the EMM common message, This is a mechanism for reading a message to be displayed and displaying the message on a screen to be output (Non-Patent Document 1).

  In the conventional IP retransmission, the EMM message is edited and generated, and since it does not have the function of multiplexing with the video / audio TS again, the display content of the automatic display message is controlled according to the contract status of the viewer. I could not.

  The conventional terrestrial digital broadcast IP retransmission system is configured as shown in FIG. 13, for example. In FIG. 13, a sending apparatus 600 sends a demodulator 602 that demodulates an input broadcast wave signal 601, a conditional access system converter 603, and an IP signal 605 to a receiving apparatus 700 via a network (not shown). IP transmission unit 604.

“BS / Broadband CS Digital Broadcasting Operation Regulations”, ARIB TR-B15 4.6 Edition (third volume), December 12, 2008, Volume 5, BS Digital Broadcasting Limited Receiving System (CAS) Receiver Specifications and Operation Regulations 4.13 Automatic display message display 4.13.1 Basic operation pp. 5-11 to 5-13

  An automatic display message in IP retransmission will be described. First, an EMM common message in IP retransmission will be described.

  In IP retransmission, the message content to be displayed on the screen is required to be changed from the message for the viewer who is watching the broadcast wave to the content for the viewer who is watching the IP retransmission (for example, Broadcast station contact information). Since this and the contents of the standard text are described in the EMM common message, in the IP retransmission, a new EMM common message is generated or a part of the EMM common message of the broadcast wave is rewritten. Is required. When these two methods are compared, the content of the fixed message is described in the EMM common message, and there is a lot of data to be reused. It is effective to partially edit

  Next, an EMM individual message in IP retransmission will be described. In IP retransmission, two methods can be considered for generating and sending an EMM individual message. There are a method for editing and using a broadcast wave of digital broadcasting, and a method for independently generating and transmitting a signal. When these two methods are compared, the EMM individual message is only about the combination of the identifier of the receiving device and the fixed sentence number, the amount of information is small, and there are few reusable parts. In the broadcast wave, since the EMM individual message is encoded by the limited reception method (B-CAS) adopted in the broadcast wave, a method of editing the EMM individual message included in the broadcast wave of the digital broadcast is adopted. Since it is necessary to cancel this encoding once and change the limited reception method to that of IP retransmission trust, it is effective to independently generate an EMM individual message and send it to the receiving apparatus. .

  Next, matters that must be observed when the sending apparatus sends an EMM message will be described.

  The first is a matter called the maximum transmission bandwidth and the minimum transmission cycle. In general, the amount of signal that can be processed per unit time by the receiving device is limited depending on the calculation speed of the receiving device and the capacity of the storage area. Therefore, when sending an EMM message, limit the amount of transmission per unit time (protect the maximum transmission bandwidth), and do not send a large amount of the same information in a short period (protect the maximum transmission frequency / minimum transmission cycle). )Is required.

  The second is a matter regarding the re-multiplexing position of each EMM message. In IP retransmission, it is necessary to maintain as much identity as possible with the broadcast wave of the original digital broadcast.

  On the broadcast wave, signals other than EMM common messages and EMM individual messages such as video and audio are also included. With all these signals arranged in the original position, the EMM common message and the uniquely generated EMM individual message equivalent signal must be multiplexed in this column. At this time, the EMM common message and the EMM individual message are transmitted in the form of a section. If the capacity of the section does not fit in one packet, the section is divided into a plurality of packets and transmitted. At this time, the broadcast wave regulations stipulate that the next section should not be sent using the same PID (Packet Identification, an identifier for identifying the packet type) until the transmission of all sections is completed. . This is because the receiving apparatus uses PID to classify information. Further, the EMM common message and the EMM individual message are handled as the same table called EMM and are transmitted by the same PID.

  For these reasons, the packet constituting the section of the EMM individual message must not be transmitted until all the sections of the EMM common message are transmitted so that the receiving apparatus can read the EMM common message as the EMM common message. Therefore, when multiplexing, sections of the EMM common message and the EMM individual message must be arranged so as not to be mixed with each other.

  The present invention solves the above-mentioned problems, and its object is to manage the minimum transmission cycle of data included in a broadcast wave and data that must be generated independently while limiting the maximum transmission bandwidth, An object of the present invention is to provide an EMM message remultiplexing apparatus, method, and program that can be transmitted while being multiplexed so that the sections do not mix with each other.

The present invention provides an EMM (EMM) included in the TS shown in FIG. 2 in the case of retransmitting a digital broadcast composed of video, audio, subtitles, data broadcast, PSI (Program Specific Information) / SI (Service Information), etc. Entity Management Message) is used.

  In the present invention, when the EMM message is included in the broadcast wave, only the EMM message is extracted from the broadcast wave, and when it is necessary to replace the display content of the message with the IP retransmission trust, the EMM common message is initialized. The fixed sentence number specified in the setting file and the fixed sentence (message content) corresponding to this fixed sentence number are replaced as described in the initial setting file. Also, the EMM individual message is discarded, and an EMM individual message equivalent signal is generated. The edited EMM common message, EMM individual message equivalent signal, and signals other than the separated EMM message are multiplexed again in the TS.

  At this time, every time a packet constituting the placement candidate EMM message is taken out one by one, a calculation is performed to divide the total amount of EMM messages after placement by unit time, and the result is the maximum transmission amount set in advance in the initial setting file. And confirm that the maximum transmission bandwidth determined in the initial setting file can be protected in advance even when placing a placement candidate packet by confirming that the calculation result is below the set value. Multiplexing while maintaining a predetermined maximum transmission bandwidth.

  At this time, if the arrangement target is an edited EMM common message, whether the transmission frequency of the EMM common message after arrangement exceeds the maximum transmission frequency set in the initial setting file is determined as follows. Confirm with. That is, the number of EMM common messages sent back in the past by unit time is counted, and the number of messages that have been arranged this time is added to 1. The calculated result is divided by the unit time, and the number of transmissions per unit time is obtained as the frequency. By confirming that this frequency is lower than the value set in the initial setting file in advance, multiplexing is performed while keeping the predetermined maximum transmission frequency.

  Further, when the arrangement target is an EMM individual message equivalent signal, it is confirmed that the transmission cycle of the EMM individual message after arrangement exceeds the minimum transmission cycle set in the initial setting file. That is, among the EMM individual message equivalent signals sent in the past, there is a signal whose combination of the identifier of the receiving device and the message content described in the EMM individual message equivalent signal to be placed this time has the same value By counting the interval until the transmission of the EMM individual message equivalent signal after arrangement, and confirming that it exceeds the minimum transmission cycle set in the initial setting file, multiplexing is performed while keeping the predetermined minimum transmission cycle. Turn into.

  At this time, if there is a section in the middle of placement, the next candidate is not included in the placement candidate until the entire section is sent out, so that the sections including the EMM message are not mixed with each other. Multiplex as follows. If there is no section in the middle of placement, the next EMM message is taken as a placement candidate. When both the EMM common message and the EMM individual message are placement candidates, since the EMM common message is information required by all the receiving apparatuses, the EMM common message is placed with priority.

  When carrying out the inventions according to claims 2 and 4, when an EMM individual message for immediate transmission is passed to the EMM common priority control remultiplexing unit while the EMM individual message is being transmitted, the EMM individual message Even during the placement of the section, it is possible to send the EMM individual message for immediate transmission first as the placement candidate first. When the EMM individual message for immediate transmission is arranged, the remaining packets of the EMM individual message that were being arranged are shifted by the amount of arrangement.

  Even when an EMM individual message for immediate delivery becomes a placement candidate, all of the above-described checks are performed in the same manner as when placing an EMM individual message that is not for immediate transmission. Even when a message is inserted, the maximum transmission bandwidth and the minimum transmission cycle can be maintained.

  The multiplexed signal after the arrangement of these signals is sent to the receiving device through the digital broadcast / IP network.

  In addition, when it is necessary to take out only the EMM message from the broadcast wave and replace the display content of the message with IP retransmission credit, the address of the broadcast station is described in the broadcast wave automatic display message. In this case, it is a case where it is desired to display a different automatic display message between the broadcast wave and the IP retransmission, for example, when it is desired to use another contact as the contact at the time of IP retransmission. This is used when a broadcaster or a retransmitter wants to distinguish whether the viewer is a viewer of the broadcast wave service or a viewer of IP retransmission when contacting the viewer.

(1) According to the first to fifth aspects of the present invention, it is possible for the viewer to view the automatic display message even when the pay broadcast in the digital broadcast is retransmitted by IP. In addition, by using the present invention, the transmission device manages the maximum transmission frequency and the minimum transmission cycle of the data included in the broadcast wave and the data that must be generated independently while limiting the maximum transmission bandwidth. In addition, the signals can be multiplexed and transmitted so that the sections do not mix with each other, and can be transmitted as a signal that can be processed by the receiving apparatus.
(2) According to the second and fourth aspects of the present invention, it is possible to immediately transmit the generated EMM individual message when the broadcasting station or the provider of the retransmission service desires.

Explanatory drawing which shows the mode of a display of the automatic display message in digital broadcasting. The block diagram of the structure of the whole TS and EMM (Entitlement Management Message) utilized by this invention. 1 is a system configuration diagram showing an embodiment of the present invention. The functional block diagram in one example of embodiment of this invention. The functional block diagram of the EMM common priority control remultiplex part in one example of embodiment of this invention. The flowchart which shows the process of the EMM common priority control remultiplex part in one embodiment of this invention. 7 is a flowchart of a check process regarding transmission of the entire EMM message in FIG. FIG. 7 is a flowchart of a check process related to sending of the edited EMM common message in FIG. The flowchart of the check process regarding transmission of the signal corresponding to an EMM individual message in FIG. Explanatory drawing which shows the process image in the EMM common priority control remultiplex part of FIG. The block diagram which shows the system structural example 1 using this invention. The block diagram which shows the system structural example 2 using this invention. The block diagram which shows an example of the conventional digital broadcast IP retransmission system.

  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. 3 shows the overall configuration of a BS digital broadcast IP retransmission system (paid broadcast transmission system) to which the present invention is applied.

  In FIG. 3, the sending apparatus 100 is configured to demodulate an input broadcast wave signal 101, an EMM message remultiplexing apparatus 1000 according to the present invention, and a signal multiplexed by the EMM message remultiplexing apparatus 1000 by IP. A conditional access system conversion unit 118 that encodes by a conditional access system used for retransmission, and an IP transmission unit 119 that transmits the IP signal 120 to the reception apparatus 200 via a network (not shown).

  104 in the EMM message remultiplexing apparatus 1000 separates an EMM common message, an EMM individual message, and a signal other than the EMM message from the broadcast wave signal demodulated by the demodulator 102, and discards the EMM individual message. As an EMM message separator.

  108 is a data replacement process for the EMM common message passed from the EMM message separation 104 according to the EMM common message editing content preset in the initial setting file 109, and the EMM common message for signals other than the EMM message. Then, the EMM common message and the EMM common message after the editing and the signal other than the EMM message in which the EMM part is nulled are passed to the EMM common priority control remultiplexing unit 112 It is an EMM common message editing part as a common message editing means.

  Reference numeral 115 denotes an EMM individual message equivalent signal generating unit that generates an EMM individual message equivalent signal based on the data that is the source of the EMM individual message equivalent signal stored in the database 113 and passes it to the EMM common priority control remultiplexing unit 112. It is an EMM individual message equivalent signal generation part.

  112 is a signal other than the edited EMM common message passed from the EMM common message editing unit 108 and the EMM message in which the EMM part is nullified, and the EMM individual message corresponding to the EMM individual message equivalent signal generation unit 115. Based on the equivalent signal and a setting value described later set in the initial setting file 109, the EMM common priority control re-multiplexing means as EMM common priority control re-multiplexing means for performing re-multiplexing data by performing three check processes described later. Multiplexer.

  4 is a functional block diagram of the entire system of FIG. 3, and the same reference numerals as those in FIG. 3 denote the same parts.

  FIG. 5 is a functional block diagram of the EMM common priority control remultiplexing unit 112 of FIGS. 3 and 4, and the same parts as those in FIGS. 3 and 4 are denoted by the same reference numerals.

In FIG. 4, the demodulator 102 demodulates the input broadcast wave signal 101 and passes the demodulated broadcast wave signal 103 to the EMM message separator 104.
The EMM message separation unit 104 receives the demodulated broadcast wave signal 103 passed from the demodulation unit 102, and receives signals 107 other than the EMM common message 105, the EMM individual message 106, and the EMM message from the demodulated broadcast wave signal 103. To separate. The EMM message separation unit 104 discards the EMM individual message 106 and passes the EMM common message 105 and the signal 107 other than the EMM message to the EMM common message editing unit 108.

  The EMM common message editing unit 108 reads EMM common message editing contents (a combination of a fixed sentence number and a fixed sentence to be rewritten) from an initial setting file 109 created in advance, and the EMM common message editing unit 104 passes the EMM common message editing unit 108. The following data replacement process is performed on the message 105. That is, when a fixed sentence corresponding to the fixed sentence number specified in the initial setting file 109 is described, the contents of the fixed sentence of the input EMM common message 105 of the broadcast wave are described in the initial setting file 109. Replace with the content of the fixed phrase after replacement. The EMM common message 105 after the partial data is replaced by the EMM common message editing unit 108 is hereinafter referred to as an edited EMM common message 110.

  The EMM common message editing unit 108 nullifies a portion in which the EMM common message 105 and the EMM individual message 106 are included in the signal 107 other than the EMM message. The EMM common message editing unit 108 passes the edited EMM common message 110 and a signal 111 other than the EMM message obtained by nullifying the EMM part to the EMM common priority control remultiplexing unit 112.

  If the fixed sentence corresponding to the fixed sentence number specified in the initial setting file 109 is not described in the input broadcast wave EMM common message 105, the input broadcast wave EMM common message 105 is used. Is used as it is, and the EMM common message 105 and the signal 111 other than the EMM message in which the EMM part is nulled are passed to the EMM common priority control re-multiplexing unit 112 (hereinafter, the EMM common message 105 is not edited for convenience of explanation) The case is also described as “EMM common message 110 after editing”).

  The EMM individual message equivalent signal generation unit 115 reads the data 114 that is the source of the EMM individual message equivalent signal from the database 113 and generates an EMM individual message equivalent signal 116.

  Here, as shown in FIG. 5, the EMM common priority control re-multiplexing unit 112 is an EMM message other than the EMM message stored from the EMM common message editing unit 108, which stores the signal 111 other than the EMM message in which the EMM part is nullified. Signal reception buffer 121, EMM common message reception buffer 122 for storing the edited EMM common message 110, and EMM individual message corresponding signal 116 passed from the EMM individual message equivalent signal generation unit 115. When the message reception buffer 123, the remultiplexing buffer 124 for constructing the remultiplexed data, and the immediate transmission request signal 126 of the EMM individual message equivalent signal as shown in FIG. By the individual message equivalent signal generator 115 EMM individual message reception buffer 127 for immediate transmission to store the generated EMM individual message corresponding signal 116 and a (for claims 2 and 4).

  The EMM common priority control remultiplexing unit 112 includes an EMM common priority control remultiplexing function 125 and a remultiplexed data transmission function 128, which will be described later.

  4, the EMM individual message equivalent signal generation unit 115 passes the EMM individual message equivalent signal 116 to the EMM individual message reception buffer 123 shown in FIG. 5 of the EMM common priority control remultiplexing unit 112.

  The EMM individual message equivalent signal generation unit 115 generates an EMM individual message equivalent signal 116 when the database 113 has an immediate transmission request signal 126 of an EMM individual message equivalent signal, and the EMM common priority control remultiplexing unit 112 of FIG. The EMM individual message reception buffer 127 for immediate transmission shown in FIG. The EMM individual message equivalent signal generation unit 115 continues to pass the same EMM individual message equivalent signal 116 to the EMM common priority control remultiplexing unit 112 unless the database 113 is changed.

  The functions of the EMM message separation unit 104, the EMM common message editing unit 108, the EMM individual message equivalent signal generation unit 115, and the EMM common priority control remultiplexing unit 112 of the EMM message remultiplexing apparatus 1000 are achieved by, for example, a computer. .

  Next, the processing flow of the EMM common priority control remultiplexing unit 112 will be described together with the main flow of FIG. 6 and the subroutines of FIGS. S001 to S043 in FIGS. 6 to 9 represent steps of each process.

  As an initial state, it is assumed that the remultiplexing buffer 124 stores a signal 111 other than the EMM message in which the EMM portion is NULL.

  Further, the processes of S007, S008, and S012 indicated by broken lines in FIG. 6 are steps executed only when the claims 2 and 4 are executed, and are not executed when the claims 1 and 3 are executed.

  S001: The EMM common priority control re-multiplexing function 125 is activated. Proceed to S002.

  S002: The EMM common priority control re-multiplexing function 125 reads a setting value from the initial setting file 109. Proceed to S003.

  S003: When data is present in the reception buffer 121 for signals other than EMM messages, the loop starts from S004 and thereafter. Proceed to S004.

  S004: It is confirmed whether there is an edited EMM common message 110 or an EMM individual message equivalent signal 116 which is about to be placed in the remultiplexing buffer 124. If there is, the process proceeds to S006. If not, the process proceeds to S005.

  S005: When only claim 1 is implemented: If there is data in the EMM common message reception buffer 122, the process proceeds to S013. If not, the process proceeds to S009. In the case of implementing claim 2 in addition to claim 1, if there is data in the EMM common message reception buffer 122, the process proceeds to S013. If not, the process proceeds to S007.

  S006: When only claim 1 is implemented: If the section placed in the re-multiplexing buffer 124 is the edited EMM common message 110, the process proceeds to S010, otherwise proceeds to S011. When claim 2 is implemented in addition to claim 1: If the section placed in the re-multiplexing buffer 124 is the edited EMM common message 110, the process proceeds to S 010; otherwise, the process proceeds to S 008.

  S007: If there is data in the EMM individual message reception buffer 127 for immediate transmission, the process proceeds to S012, and if not, the process proceeds to S009.

  S008: If there is data in the EMM individual message reception buffer 127 for immediate transmission, the process proceeds to S012, and if not, the process proceeds to S011.

  S009: If there is data in the EMM individual message reception buffer 123, the process proceeds to S014, and if not, the process proceeds to S021.

  S010: The next packet of the section in the EMM common message reception buffer 122 that is being placed is taken out as a placement candidate, and the checks after S015 (first check of the present invention) are performed. Proceed to S015.

  S011: One packet next to the section in the EMM individual message reception buffer 123 being placed is taken out as a placement candidate, and checks after S015 are performed. Proceed to S015.

  S012: When only claim 1 is executed: This flow is not executed in any processing route. In the case of implementing claim 2 in addition to claim 1, packets in the EMM individual message reception buffer 127 for immediate transmission are taken out as arrangement candidates and checked after S015. Proceed to S015.

  S013: The first packet of the section input to the EMM common message reception buffer 122 for the first time is used as the next arrangement candidate, and the checks after S015 are performed. Proceed to S015.

  S014: The check after S015 is performed with the first packet of the section input to the EMM individual message reception buffer 123 as the oldest one as the next placement candidate. Proceed to S015.

  S015: Whether or not the maximum transmission amount set in the initial setting file 109 and the maximum transmission bandwidth will not be transmitted by arranging the packet for one candidate target packet The first check for determination, that is, the processing of S024 to S031 in FIG. When the check is completed, the process proceeds to S016.

  S016: If one candidate packet is an EMM common message, the process proceeds to S017. Otherwise, the process proceeds to S018.

  S017: A second process for determining whether the packet is to be sent by exceeding the maximum sending frequency of the EMM common message set in the initial setting file 109 by arranging the packet for one candidate packet. A check, that is, a check regarding sending of the edited EMM common message in S032 to S037 of FIG. 8 described later is performed. When the check is completed, the process proceeds to S019.

  S018: It is determined whether the packet is to be sent below the minimum EMM individual message transmission interval set in the initial setting file 109 by arranging the packet for one candidate packet. The third check is performed, that is, a check related to transmission of an EMM individual message equivalent signal in S038 to S043 in FIG. 9 to be described later. When the check is completed, the process proceeds to S019.

  S019: If all the check results are OK, the process proceeds to S020. Otherwise, the process proceeds to S021.

  S020: One candidate packet is placed at the position of the next NULL packet in the re-multiplexing buffer 124, and the process proceeds to S004.

  S021: Nothing is placed at the position of the next NULL packet in the re-multiplexing buffer 124, leaving the NULL packet, and the process proceeds to S022.

  S022: If there is data in the reception buffer 121 for signals other than EMM messages, the process proceeds to S004, and if not, the process proceeds to S023.

  S023: The EMM common priority control remultiplex function 125 is terminated.

  The flow of the check process relating to the transmission of the entire EMM message in FIG. 7 executed in S015 will be described below.

  S024: Activating check processing related to transmission of the entire EMM message. Proceed to S025.

  S025: A setting value is read from the initial setting file 109. Proceed to S026.

  S026: When arrangement candidate packets are arranged, it is confirmed whether packets having the same PID are continuously arranged beyond the setting value read from the initial setting file 109. If not, the process proceeds to S027, and if it exceeds, the process proceeds to S030.

  S027: When an arrangement candidate packet is arranged, it is confirmed whether or not an EMM message is transmitted beyond the maximum transmission band read from the initial setting file 109. If not, the process proceeds to S028, and if it exceeds, the process proceeds to S029.

  S028: OK is returned as a check result to the main routine. Proceed to S031.

  S029: OK is not returned as a check result to the main routine. Proceed to S031.

  S030: OK is not returned as a check result to the main routine. Proceed to S031.

  S031: The check process regarding transmission of the entire EMM message is terminated.

  The flow of the check process related to sending the edited EMM common message 110 shown in FIG. 8 executed in S017 will be described below.

  S032: A check process for sending the edited EMM common message 110 is started. Proceed to S033.

  S033: A setting value is read from the initial setting file 109. Proceed to S034.

  S034: When arrangement candidate packets are arranged, it is confirmed whether the maximum transmission frequency of the EMM common message section exceeds the setting value read from the initial setting file 109. If not, the process proceeds to S035. If so, the process proceeds to S036.

  S035: Returns OK as a check result to the main routine. Proceed to S037.

  S036: OK is not returned as a check result to the main routine. Proceed to S037.

  S037: The check process regarding sending of the edited EMM common message 110 is terminated.

  Hereinafter, the flow of the check process related to the transmission of the EMM individual message equivalent signal 116 of FIG. 9 executed in S018 will be described.

  S038: A check process regarding transmission of the EMM individual message equivalent signal 116 is started. Proceed to S039.

  S039: The setting value is read from the initial setting file 109. Proceed to S040.

  S040: When arrangement candidate packets are arranged, it is confirmed whether the transmission of the EMM individual message equivalent signal 116 is less than the minimum interval setting value for the same receiving device 200 read from the initial setting file 109. If not, the process proceeds to S041. If it is lower, the process proceeds to S042.

  S041: Returns OK as a check result to the main routine. The process proceeds to S043.

  S042: OK is not returned as a check result to the main routine. The process proceeds to S043.

  S043: The check process regarding transmission of the EMM individual message equivalent signal 116 is terminated.

  5 passes the multiplexed signal 117 recorded in the remultiplexing buffer 124 to the conditional access system conversion unit 118.

  The conditional access system conversion unit 118 encodes the multiplexed signal 117 passed from the EMM common priority control remultiplexing unit 112 with the conditional access system used for IP retransmission, and then transmits the IP transmission unit 119. To pass.

  The IP transmission unit 119 sends the IP signal 120 passed from the conditional access system conversion unit 118 to the digital broadcast / IP network 300.

  The digital broadcast / IP network 300 outputs the IP signal 120 input from the transmission device 100 to the reception device 200.

  The receiving device 200 receives the IP signal 120 input from the digital broadcast / IP network 300. The receiving apparatus 200 extracts the edited EMM common message 110 and the EMM individual message equivalent signal 116 from the received IP signal 120, reads the contents to be displayed as an automatic display message by combining them, and displays them on the screen.

  FIG. 10 shows a processing image in the EMM common priority control remultiplexing unit 112, and (a) shows an example of the demodulated broadcast wave signal 103. FIG. (B) shows a signal 111 other than the EMM message stored in the re-multiplexing buffer 124 first, in which the EMM part is NULL (the broken line part in the figure). (C) shows the edited EMM common message 110 stored in the EMM common message reception buffer 122. (D) shows an EMM individual message equivalent signal stored in the EMM individual message reception buffer 123. (E) and (f) show an operation image of the re-multiplexing buffer 124.

  In FIG. 10, the message being arranged is preferentially arranged in the remultiplex buffer 124 until the entire section is arranged.

  When there are EMM individual messages and EMM common messages, they are preferentially arranged from the EMM common messages.

  It is determined whether or not all transmission checks (S015, S017, S018 in FIG. 6) are satisfied by arranging the next packet every time one packet candidate is extracted.

  If the check result is OK, one packet is arranged as shown by the solid line part in FIGS. 10E and 10F, and if it is not OK, there is nothing for the next one NULL packet as shown by the broken line part in FIG. Do not place.

  FIG. 11 shows a system according to the first embodiment of the present invention, which can operate an automatic display message in IP broadcasting and can transmit a signal that is a source of the automatic display message in a form that can be processed by a receiving apparatus.

  The system in FIG. 11 includes a sending device 401 having the function of the EMM message remultiplexing device 1000, an IP network 402, a multicast stream 403, and a receiving device 404.

The sending device 401 has a function of sending a multicast stream 403 including a broadcast program and an EMM message for carrying out an automatic display message to the IP network 402. The IP network 402 has a function of transmitting the multicast stream 403 input from the transmission device 401 to the reception device 404. The receiving device 404 has a function of receiving the multicast stream 403 transmitted from the IP network 402, a function of extracting an EMM message that is a signal for displaying an automatic display message from the multicast stream 403, and a viewer When a pay program that is not subscribed to is selected and the automatic display message is set to be displayed on the transmission device 401, the automatic display message as set by the extracted EMM message is displayed on the screen. It has a function. Next, system operation in the first embodiment in IP broadcasting will be described.
(1) The sending apparatus 401 sends an IP broadcast multicast stream 403 to the IP network 402 at the time of activation, every predetermined time, or at a time designated by the user. At this time, if the content of the IP broadcast is a pay broadcast, the processing described in FIGS. 3 to 6 is performed, and as shown in FIG. Multiplex the message and send it out.
(2) The receiving device 404 receives the multicast stream 403, extracts an EMM message from the multicast stream 403, and displays an automatic display message having contents designated by the EMM message on the screen.

  FIG. 12 shows a system according to the second embodiment of the present invention, which can operate an automatic display message in IP retransmission and can transmit a signal that is a source of the automatic display message in a form that can be processed by a receiving apparatus.

  The system shown in FIG. 12 includes a broadcasting station equipment 501, a digital broadcast wave 502, a sending device 503 having the functions of the EMM message remultiplexing device 1000, an IP network 504, a multicast stream 505, and a receiving device 506.

  The broadcasting station equipment 501 has a function of transmitting a broadcast wave 502 of digital broadcasting. The sending device 503 has a function of receiving a broadcast wave 502 of a digital broadcast. The EMM message extracted from the broadcast wave 502 of the digital broadcast is partly changed, partly newly generated, re-multiplexed, and multicast stream 505. And the function of sending the generated multicast stream 505 to the IP network 504. The IP network 504 has a function of transmitting the multicast stream 505 input from the transmission device 503 to the reception device 506. The receiving device 506 has a function of receiving a multicast stream 505 transmitted from the IP network 504, a function of extracting an EMM message that is a signal for displaying an automatic display message from the multicast stream 505, and a viewer. When a pay program that is not subscribed to is selected and the automatic display message is set to be displayed on the transmission device 503, the automatic display message as set in the extracted EMM message is displayed on the screen. It has a function.

Hereinafter, the system operation in the second embodiment in the IP retransmission will be described.
(1) The broadcasting station equipment 501 transmits a broadcast wave 502 of digital broadcasting on which information on a broadcast program is placed. When the broadcast program is a pay broadcast, an EMM message, which is a signal for allowing a non-subscriber to view an automatic display message, is multiplexed and transmitted on the broadcast wave 502 of the digital broadcast.
(2) The transmission device 503 receives a broadcast wave 502 of digital broadcasting. At this time, the transmission device 503 explained in FIGS. 3 to 6 when the digital broadcast wave 502 is a pay broadcast and when the automatic display message is operated for the pay broadcast. Processing is performed, and the following processing is performed as shown in FIG. That is, an EMM message is extracted from the broadcast wave 502 of the digital broadcast, and among the extracted EMM messages, the EMM common message is rewritten with data as set in the initial setting file of the transmission device 503 in advance, and the extracted EMM message Among them, the EMM individual message is discarded, and an original EMM individual message equivalent signal is generated from the database, and the receiving device 506 can read the signal other than the EMM message, the edited EMM common message, and the generated EMM individual message equivalent signal. As described above, the maximum transmission bandwidth, the maximum transmission frequency, and the minimum transmission cycle are multiplexed according to the values set in the initial setting file in advance, and are generated in the form of a multicast stream 505. The sending device 503 sends the generated multicast stream 505 to the IP network 504.
(3) The receiving device 506 receives the multicast stream 505, extracts an EMM message from the multicast stream 505, and displays an automatic display message having contents specified by the EMM message on the screen.

  Also, the present invention can be realized by configuring some or all of the functions of each means in the EMM message remultiplexing apparatus of the present embodiment by a computer program and executing the program using the computer. It is needless to say that the procedure in the form of the EMM message remultiplexing method can be constituted by a computer program, and the program can be executed by the computer, and the computer-readable recording of the program for realizing the function by the computer Media such as FD (Floppy (registered trademark) Disk), MO (Magneto-Optical disk), ROM (Read Only Memory), memory card, CD (Compact Disk) -ROM, DVD (Digit) al Versatile Disk) -ROM, CD-R, CD-RW, HDD, removable disk, etc., and can be stored or distributed. It is also possible to provide the above program through a network such as the Internet or electronic mail.

DESCRIPTION OF SYMBOLS 100, 401, 503 ... Sending apparatus 102 ... Demodulation part 104 ... EMM message separation part 108 ... EMM common message edit part 109 ... Initial setting file 112 ... EMM common priority control remultiplex part 113 ... Database 115 ... EMM individual message equivalent signal generation Reference numeral 121 ... Reception buffer for signals other than EMM messages 122 ... EMM common message reception buffer 123 ... EMM individual message reception buffer 124 ... Remultiplexing buffer 125 ... EMM common priority control remultiplexing function 127 ... EMM individual message reception for immediate transmission Buffer 128 ... Remultiplexed data transmission function 200, 404, 506 ... Receiving device 1000 ... EMM message remultiplexing device

Claims (5)

EMM message separation means for separating an EMM common message, an EMM individual message and a signal other than an EMM message from a broadcast wave signal obtained by demodulating a digital broadcast wave, and discarding the EMM individual message;
Data replacement processing for the EMM common message passed from the EMM message separation means according to the EMM common message editing contents set in advance in the initial setting file, and signals other than the EMM message, the EMM common message and the EMM individual message. EMM common message editing means for performing a process of nullifying the part including the EMM common message and passing the edited EMM common message and a signal other than the EMM message in which the EMM part is nullified to the EMM common priority control re-multiplexing means ,
EMM individual message equivalent signal generating means for generating an EMM individual message equivalent signal based on the data that is the source of the EMM individual message equivalent signal stored in the database and passing it to the EMM common priority control remultiplex means;
A reception buffer for a signal other than an EMM message that is passed from the EMM common message editing means and stores a signal other than an EMM message in which an EMM portion is null; an EMM common message reception buffer for storing an edited EMM common message; An EMM individual message reception buffer for storing an EMM individual message equivalent signal passed from the EMM individual message equivalent signal generation means, and a remultiplexing buffer for constructing remultiplexed data,
After the signal other than the EMM message in the reception buffer of the signal other than the EMM message is arranged in the buffer for re-multiplexing, the signal other than the EMM message is made into a null.
For each packet of signals in the EMM common message receive buffer and the EMM individual message receive buffer,
By arranging the packet, a first check for determining whether the maximum transmission amount set in the initial setting file does not exceed the maximum transmission bandwidth and the EMM common message A second check for determining whether or not the transmission will exceed the maximum transmission frequency, and a third check for determining whether or not the transmission will occur below the minimum EMM individual message transmission interval to the same receiving apparatus. Run,
EMM common priority control remultiplexing means for constructing remultiplexed data by arranging a packet satisfying all of the first to third check requirements at the position of the packet in which the EMM portion in the remultiplex buffer is nullified;
An EMM message remultiplexing apparatus for realizing an automatic display message at the time of IP retransmission of digital broadcasting. The database stores an immediate transmission request signal of an EMM individual message equivalent signal,
The EMM common priority control re-multiplexing means further comprises an EMM individual message reception buffer for immediate transmission,
The EMM individual message equivalent signal generating means generates an EMM individual message equivalent signal based on the immediate transmission request signal of the EMM individual message equivalent signal, and the signal is sent as an EMM for immediate transmission of the EMM common priority control remultiplex means. Pass to the individual message receive buffer,
When there is a signal in the EMM individual message reception buffer for immediate transmission, the EMM common priority control remultiplexing means gives priority to the packet of the signal over the signal packet in the EMM individual message reception buffer. The EMM message remultiplexing apparatus for realizing an automatic display message at the time of digital retransmission IP retransmission according to claim 1, wherein the first to third checks are executed. An EMM message separation means for separating an EMM common message, an EMM individual message, and a signal other than an EMM message from a broadcast wave signal obtained by demodulating a digital broadcast wave, and discarding the EMM individual message;
The EMM common message editing means performs data replacement processing for the EMM common message passed from the EMM message separation means according to the EMM common message editing content preset in the initial setting file, and signals other than the EMM message, The EMM common message and the part containing the EMM individual message are nullified, and the edited EMM common message and the signal other than the EMM message in which the EMM part is nullified are sent to the EMM common priority control re-multiplexing means. EMM common message editing step to pass,
The EMM individual message equivalent signal generating means generates an EMM individual message equivalent signal based on the original data of the EMM individual message equivalent signal stored in the database and passes it to the EMM common priority control remultiplex means. Generation step;
A reception buffer for a signal other than an EMM message that is passed from the EMM common message editing means and stores a signal other than an EMM message in which an EMM portion is null; an EMM common message reception buffer for storing an edited EMM common message; , EMM common priority control remultiplexing provided with an EMM individual message reception buffer for storing an EMM individual message equivalent signal passed from the EMM individual message equivalent signal generation means and a remultiplexing buffer for constructing remultiplexed data Means
Placing a signal other than an EMM message obtained by nullifying an EMM portion in a reception buffer of a signal other than the EMM message in the remultiplexing buffer;
A check step performed for each packet of signals in the EMM common message receive buffer and the EMM individual message receive buffer,
A first check step for determining whether or not the maximum transmission amount set in the initial setting file is exceeded and the maximum transmission bandwidth is not transmitted by arranging the packet;
A second check step of determining whether or not the packet is to be transmitted by exceeding the maximum transmission frequency of the EMM common message set in the initial setting file;
A third check step for determining whether or not the packet is to be sent below the minimum EMM individual message transmission interval set in the initial setting file by placing the packet;
Arranging a packet satisfying all of the first to third check requirements at a position of a packet obtained by nullifying the EMM portion in the remultiplex buffer, and constructing remultiplex data;
An EMM message remultiplexing method for realizing an automatic display message at the time of IP retransmission of a digital broadcast. The database stores an immediate transmission request signal of an EMM individual message equivalent signal,
The EMM common priority control re-multiplexing means further comprises an EMM individual message reception buffer for immediate transmission,
In the EMM individual message equivalent signal generation step, an EMM individual message equivalent signal is generated based on an immediate transmission request signal of the EMM individual message equivalent signal, and the EMM for immediate transmission of the EMM common priority control remultiplexing means is generated. Pass to the individual message receive buffer,
When there is a signal in the EMM individual message reception buffer for immediate transmission, the EMM common priority control remultiplexing means gives priority to the packet of the signal over the signal packet in the EMM individual message reception buffer. 4. The EMM message remultiplexing method for realizing an automatic display message at the time of IP retransmission of digital broadcasting according to claim 3, wherein the first to third check steps are executed. An EMM message remultiplexing program for realizing an automatic display message at the time of IP retransmission of digital broadcasting, which causes a computer to function as each means according to claim 1.

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