JP2010011437A - Ts separation/section editing apparatus, ts separation/section editing method and ts separation/section editing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a TS (Transport Stream) separation/section editing method by which transmission capacity per TS can be reduced when retransmitting a digital broadcast over a network other than broadcast waves. <P>SOLUTION: A digital broadcast TS 10 is constituted of: video, audio, captions and superimposed characters of a TV broadcast service; ES (Elementary Stream) (TV ES) of an interlocked data broadcast; ES (data broadcast ES) of an independent data broadcast service; service information (common PSI (Program Specific Information)/SI (Service Information)) that becomes a table inside a TS; and sections (TVPSI/SI) and data broadcast PSI/SI whose tables are different for each service inside the TS. The digital broadcast TS 10 is separated into two TSs of a TV broadcast TS 13 and an independent data broadcast TS 14. Then, respective unnecessary ES packets (data broadcast ES and data broadcast PSI/SI or TV ES and TV PSI/SI) are deleted (replaced with NULL packet) by a TS separation/section editing apparatus 11 for TV broadcasting and a TS separation/section editing apparatus 12 for independent data broadcasting. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention retransmits a digital broadcast program composed of video, audio, subtitles, data broadcasting, PCR (Program Clock Reference), PSI (Program Specific Information) / SI (Service Information), etc. to general viewers. In particular, the present invention relates to an apparatus, a method, and a program for separating TS (Transport Stream) and editing a PSI / SI section in order to reduce transmission capacity for transmitting a program.

  When resending a high-quality and large-capacity digital broadcast program over a plurality of channels on a network other than the broadcast wave, an increase in transmission capacity becomes a problem.

  In particular, in retransmission on an IP network using IP multicast, since there is an upper limit on the total amount of signals that can be transmitted on the user's access line, only the 1TS (one multicast stream) selected by the user is transmitted to the access line. In many cases, this method is used.

  The receiver makes a stream reception request to the multicast address of one multicast stream that transmits one TS selected by the user, and only one multicast stream that transmits one TS selected by the user is accessed from the network based on this request. Sent to.

  In such a situation, when a plurality of users share one access line or perform simultaneous recording of viewing and another program from one receiver, an IP multicast stream transmitted on the access line Therefore, it is necessary to reduce the transmission capacity per multicast stream (1TS) as much as possible.

  For video, it is possible to reduce the transmission capacity without loss of information content or degradation of video quality by applying a higher compression rate encoding method, but for data streams such as data broadcasting, The transmission capacity cannot be reduced by changing the encoding method.

  As a conventional technique for reducing the transmission capacity of data broadcasting, there is a method described in Non-Patent Document 1. In this method, as shown in FIG. 10, the amount of transmission is compressed by extending the retransmission cycle of TS packets of data broadcasts that are repeatedly transmitted and have relatively high redundancy.

  In the method described in Non-Patent Document 1, event messages (E) and DII (Download Info Indication), which are necessary for notification of synchronized display with video and data content update, of data carousels are through output. Thus, even when the retransmission period is extended, the accuracy of the synchronized display with the video and the timing of the content display can be provided in the same manner as the broadcast wave.

  Note that in FIG. 10, DDB is Download Data Block.

“High-efficiency transmission method for digital broadcast IP retransmission service”, The Institute of Image Information and Television Engineers Technical Report Vol. 32, no. 7, pp. 29-32, CE2008-18, MMS2008-18 (Feb. 2008)

  In the conventional system, DII, DDB, event messages, etc. are the minimum required even when the transmission capacity of data broadcasting is relatively large, the transmission band of the retransmitted network is narrow, or when further reduction of the transmission capacity is desired. Therefore, it is difficult to further reduce the transmission capacity. Also, in the conventional method, if further reduction of the transmission capacity is required and the retransmission period of the TS packet for data broadcasting is greatly extended, the time until the reception of the data carousel module is extended. Compared to the above, there is a possibility that the display of the data broadcast may be delayed, and it is difficult to maintain the identity of the broadcast.

  The present invention solves the above-described problems, and an object of the present invention is to provide a TS separation / section editing apparatus that can reduce the transmission capacity per TS when a digital broadcast is retransmitted on a network other than a broadcast wave. To provide a separation / section editing method and a TS separation / section editing program.

An outline of the present invention for solving the above problems is shown in FIG. In the present invention, an ES (Elementary Stream) (TV ES) for video / audio / subtitles / superimposed / data broadcasting of a TV broadcasting service, an ES (data broadcasting ES) of an independent data broadcasting service, and one table in the TS. Sections (NIT (Network Information Table), PAT (Program Association Table), SDT (Service Description Table)) (common PSI / SI) and sections (PMT (Program Map Map)) with different tables for each service in the TS , EIT (Event Information Table) (TV PSI / SI and Data Broadcast PSI / SI) S13 and independent data broadcast TS14 are separated into two TSs, respectively, unnecessary ES and section (data broadcast ES and data broadcast PSI / SI in the case of TV broadcast TS, TV ES and TV PSI / in the case of independent data broadcast TS) (SI) is deleted (replaced with a NULL packet) by the TS separation / section editing device 11 for TV broadcasting and the TS separation / section editing device 12 for independent data broadcasting, thereby realizing the following.
(1) Reduce the transmission capacity per TS.
(2) By transmitting an independent data broadcast having the same content as a broadcast wave of digital broadcast as another TS, reception of the data broadcast can be started immediately after channel selection.

  In addition, when the independent data broadcast of the digital broadcast is separated into another TS, inconsistency with the original service information (PSI / SI section) occurs, so that the contents of the PSI / SI section can be edited to ensure consistency. It is possible to do.

  Furthermore, in the present invention, when digital broadcasting is retransmitted on a network other than broadcast waves, if the viewing restriction system for pay broadcasting is different, inconsistency occurs in service information (contract confirmation information, etc.), so PSI / SI It is possible to edit the contents of the section to ensure consistency.

  That is, the TS separation / section editing device according to claim 1 is a TV broadcast TS separation / section editing means for extracting only a TV broadcast TS used for a TV broadcast service from a digital broadcast TS (Transport Stream). And an independent data broadcasting TS separation / section editing means for extracting only the independent data broadcasting TS used for the independent data broadcasting service from the digital broadcasting TS.

(1) According to the invention described in claims 1 to 7, it is possible to reduce the transmission capacity per TS by separating the digital broadcasting TS into two TSs of the TV broadcasting TS and the independent data broadcasting TS. . In the present invention, by separating the TV broadcast TS and the independent data broadcast TS, reception of the data broadcast can be started while reducing the transmission capacity per TS.
(2) According to the inventions of claims 2 and 5, since the PSI / SI section information can be edited, inconsistency with the original service information (PSI / SI section) before separation is absorbed. can do.
(3) Further, according to the inventions of claims 3 and 6, since the contents of the PSI / SI section can be edited, when retransmitting a digital broadcast over a network other than a broadcast wave, It is possible to absorb inconsistencies in service information (contract confirmation information, etc.) that occur when the viewing restriction system is different.

Explanatory drawing which shows the outline | summary of the TS isolation | separation / section edit method using this invention. 1 is a block diagram showing a configuration of a digital broadcast retransmission system according to an embodiment of the present invention. The flowchart which shows the flow of the process of the principal part in the example of embodiment of this invention. Explanatory drawing which shows the example of the packet classification for deletion for every TS isolation | separation / section editing apparatus in Example 1 of this invention. Explanatory drawing which shows the section edit content accompanying TS isolation | separation in Example 1 of this invention. Explanatory drawing which shows the list of the section edit item accompanying the change of the viewing restriction system in Example 1 of this invention. Explanatory drawing which shows the example of the packet classification for deletion for every TS isolation | separation / section editing apparatus in Example 2 of this invention. Explanatory drawing which shows the section edit content accompanying TS isolation | separation in Example 2 of this invention. Explanatory drawing which shows the list of the section edit item accompanying the change of the viewing restriction system in Example 2 of this invention. Explanatory drawing which shows the transmission capacity reduction by a conventional 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.

  In the present embodiment example, a digital broadcast retransmission system is configured in which the received digital broadcast is separated into 2 TSs and the transmission capacity of the digital broadcast program is reduced and transmitted.

  In the present embodiment, the program input to the system is composed of video, audio, captions, data broadcast, PCR, PSI / SI, and the like. The separation of the TS is performed by distributing the input digital broadcasting TS and filtering (deleting) unnecessary ES and sections for the TV broadcasting TS and the independent data broadcasting TS, respectively. With the separation of TS and the change of the viewing restriction system, inconsistency of service information (PSI / SI section) occurs. In order to correct this inconsistency, the PSI / SI section is edited.

  FIG. 2 shows the overall configuration of the system according to the first embodiment. In FIG. 2, reference numeral 101 denotes a demodulator having a function of receiving and demodulating a broadcast wave for transmitting a digital broadcast and outputting MPEG-2 TS.

  Reference numeral 102 denotes a signal distribution device having a function of branching an MPEG-2 TS signal into a plurality of physical outputs. The signal distribution device 102 receives the MPEG-2 TS input from the demodulation device 101, and converts the same contents into a video code conversion device 103, It is distributed and output to the TS separation / section editing device 104a for TV broadcasting and the TS separation / section editing device 104b for independent data broadcasting.

  Hereinafter, the TS separation / section editing device 104a for TV broadcasting is referred to as TS separation / section editing device # 1, and the TS separation / section editing device 104b for independent data broadcasting is referred to as TS separation / section editing device # 2.

  The video code conversion device 103 has a code conversion function, receives the MPEG-2 TS input from the signal distribution device 102, and converts the MPEG-2 video signal included in the MPEG-2 TS to the H.264 format. Code-converted to H.264 / AVC video and output.

  The TV broadcast TS separation / section editing apparatus # 1 (104a; the TV broadcast TS separation / section editing means of the present invention) is a TV used for the TV broadcast service from the MPEG-2 TS input from the signal distribution apparatus 102. Function to extract and output only broadcasting TS, function to delete unnecessary ES and section, function to modify related parameters of PSI / SI section in accordance with deletion, and PSI section and SI section due to change of viewing restriction method It has a function to correct.

  The TS separation / section editing apparatus # 2 (104b; independent data broadcasting TS separation / section editing means of the present invention) for independent data broadcasting is independent data from the MPEG-2 TS input from the signal distribution apparatus 102. A function for extracting and outputting only TS for independent data broadcasting used for broadcasting services, a function for deleting unnecessary ESs and sections, a function for correcting related parameters of PSI / SI sections in accordance with the deletion, and a method for restricting viewing At the same time, it has a function of correcting the PSI section and SI section.

  The TS separation / section editing apparatuses # 1 and # 2 are provided with a recording unit (not shown) for recording a PID (Packet ID) for each packet of the MPEG-2 TS packet.

  Reference numeral 105 denotes a multiplexing apparatus that multiplexes the TS input from the video code conversion apparatus 103 and the TS input from the TV broadcasting TS separation / section editing apparatus # 1 while correcting a shift in reception time. The time information included in the PCR packet included in each TS is used for the correction of the reception time shift. The multiplexed TS is output to the IP transmission device 106.

  The IP transmission device 106 has a function of converting the input TS to IP and transmitting it to the network by multicast. The TS (TV broadcast TS) input from the multiplexing device 105 and the TS separation for independent data broadcasting are provided. / TS (independent data broadcast TS) input from section editing apparatus # 2 is sent out by different multicasts. Of the input TS packets, the NULL packet (replaced by the TS separation / section editing device) is deleted and transmitted, so that the transmission capacity per multicast can be reduced.

  By the way, B-CAS is used as a viewing restriction system for digital broadcasting broadcast on broadcast waves. When retransmitting a digital broadcast broadcast on a broadcast wave, there is a case where the retransmission company wants to apply a viewing restriction different from the broadcast wave. For example, when a pay broadcast is desired to be viewed only by a viewer who has contracted with a re-transmission company, the re-transmission company may wish to apply a viewing restriction different from the broadcast wave. There are several descriptors related to viewing restrictions in the PSI / SI section of the digital broadcast TS of broadcast waves, and these descriptors need to be changed in order to change the viewing restriction method. Therefore, when the input digital broadcast TS is restricted (scrambled) for viewing, and when viewing restriction (scramble) is performed using a different viewing restriction method, the TS separation / section editing apparatus uses the PSI / SI. You need to edit the section and correct any inconsistencies in the service information.

  Next, the process flow of the TS separation / section editing apparatuses # 1 and # 2 will be described with reference to the flowchart of FIG. In step S1, an MPEG-2 TS packet constituting a digital broadcast program input from the signal distribution device 102 is received.

  In step S2, the packet header is analyzed for the received TS packet, and the PID for each packet is extracted and output together with the packet.

  In step S3-1, it is determined whether the PID for each packet is a PID indicating PAT or PMT. If the PID is not a PAT packet or a PMT packet, the process proceeds to step S4. If the packet is a PAT packet or a PMT packet, the process proceeds to step S3-2. In any case, step S3-1 outputs the packet and the PID for each packet.

  In step S3-2, it is determined whether the PID for each packet of the packet received from step S3-1 matches the PID recorded in the recording unit as the analyzed PAT / PMT packet. When the PID for each packet of the packet received from step S3-1 matches one of the PIDs recorded in the recording unit as the analyzed PAT / PMT packet, the packet received from step S3-1 has been analyzed. As a PAT / PMT packet, the packet and the PID for each packet are passed to step S4. If the PID for each packet of the packet received from step S3-1 is not recorded in the recording unit as an analyzed PAT / PMT packet, the packet received from step S3-1 is stepped as an unanalyzed PAT / PMT packet. The packet and the PID for each packet are passed to S3-3.

  In step S3-3, the PAT packet and the PMT packet are analyzed, and the PID of the deletion target packet and the PID of the section editing target packet are extracted and recorded in the recording unit. Also, the PID of the analyzed packet is recorded in the recording unit as the analyzed PID, and the packet and the PID for each packet are passed to step S4.

  In step S4, the packet and the PID for each packet are received and a filtering process is performed. In step S4, a PID for distinguishing the type of packet is extracted from the packet passed from step S3, and it is determined whether or not this PID corresponds to a deletion target packet type recorded in the recording unit in advance. When the PID for distinguishing the packet type passed from step S3-1, S3-2 or S3-3 is equal to the PID of any one of the deletion target packet types, step S3-1, S3-2 or S3 It is determined that the packet passed from -3 is a packet to be deleted, and the process proceeds to S11. In step S11, the packet is discarded (replaced with a NULL packet), passed to step S8, and stored.

  The TS packets to be deleted are independent data broadcast ES and independent data broadcast PSI / SI for TS separation / section editing apparatus # 1, and TV ES and TV PSI / SI for TS separation / section editing apparatus # 2. .

  If the PID that distinguishes the type of packet passed from step S3-1, S3-2, or S3-3 is not equal to any of the PIDs of the packet type to be deleted, step S3-1, S3-2, or S3 It is determined that the packet passed from -3 is not a deletion target packet. In this case, step S4 passes the packet, the PID for each packet and the PID for distinguishing the packet type to step S5.

  As shown in FIG. 4, the packet type to be deleted in the TS separation / section editing apparatus # 1 for TV broadcasting is a PID packet indicating “independent data broadcasting” and “data broadcasting PSI / SI”. Also, the types of packets to be deleted in the TS separation / section editing apparatus # 2 for independent data broadcasting are “TV video”, “TV audio”, “caption”, “text super”, “TVPSI / SI”, “interlocking” The packet is a PID indicating “data broadcasting”. In FIG. 4, a packet labeled “deleted” is a deletion target packet.

  In step S5, based on the PID information of the section editing target packet recorded in advance in the recording unit, it is determined whether or not the packet corresponds to a packet for section editing.

  At this time, if the PID for distinguishing the packet type passed from step S4 is equal to the PID of the section edit target packet type, the packet passed from step S4 is determined to be the edit target packet. If the PID that distinguishes the type of packet passed from step S4 is not equal to the PID of the packet type to be edited, it is determined that the packet passed from step S4 is not the packet to be edited.

  The TS packets subject to section editing are PAT (Program Association Table), PMT (Program Map Table), CAT (Conditional Access Table), SDT (Service Description Table, EIT), NIT (Network Information Table, EIT). ) The section-edited TS packet is passed to step S6. TS packets that are not subject to section editing are transferred to step S8 and stored. In step S6, the payload information of the input TS packet is extracted and sectioned.

  The sectioned TS packet is edited based on “section editing contents accompanying TS separation” shown in FIG. 5 and “section editing item list accompanying change in viewing restriction method” shown in FIG. 6, and is passed to step S7. .

  Note that FIG. 5 shows a TS separation / section editing apparatus # 1 for TV broadcasting and a TS separation / section editing apparatus # 2 for independent data broadcasting in order to ensure consistency of data contents as TS separation is performed. The relationship between the type of packet to be edited and the editing content is shown.

  In step S7, the edited section is converted into a TS packet again and passed to step S8. In step S8, multiplexing is performed in the order of early transmission time among the packet subjected to NULL replacement, the TS packet edited, and the TS packet not edited.

  Next, in the case of the TS separation / section editing apparatus # 1 in step S 9, the multiplexed TS packet is output to the multiplexing apparatus 105. In the case of the TS separation / section editing apparatus # 2 in step S10, the multiplexed packet is output to the IP transmission apparatus 106.

  The overall configuration of the system according to the second embodiment is the same as that of FIG. 2, but the TS separation / section editing apparatus # 1 (104a) for TV broadcasting and the TS separation / section editing apparatus # 2 (104b) for independent data broadcasting are used. Only differ as follows.

  The TV broadcast TS separation / section editing apparatus # 1 (104a; TS broadcast TS separation / section editing means of the present invention) removes unnecessary ES and sections from the MPEG-2 TS input from the signal distribution apparatus 102. A function of extracting and outputting only a TV broadcast TS used for TV broadcast service, a function of correcting related parameters of the PSI / SI section when the ES and section are deleted, and a PSI / It has a function to modify related parameters of SI section.

  In addition, TS separation / section editing apparatus # 2 (104b; independent data broadcasting TS separation / section editing means of the present invention) for independent data broadcasting is unnecessary from the MPEG-2 TS input from the signal distribution apparatus 102. Function for extracting and outputting only independent data broadcasting TS used for independent data broadcasting service by deleting ES and section, function for correcting related parameters of PSI / SI section when ES and section are deleted, and viewing restriction method Has the function of correcting the related parameters of the PSI / SI section in accordance with the change of the PSI / SI.

  The TS separation / section editing apparatuses # 1 and # 2 are provided with a recording unit (not shown) for recording a PID (Packet ID) for each packet of the MPEG-2 TS packet.

  Next, the process flow of the TS separation / section editing apparatuses # 1 and # 2 in the second embodiment will be described with reference to the flowchart of FIG. In step S1, an MPEG-2 TS packet constituting a digital broadcast program input from the signal distribution device 102 is received.

  In step S2, the packet header is analyzed for the received TS packet, and the PID for each packet is extracted and output together with the packet.

  In step S3-1, it is determined whether the PID for each packet is a PID indicating PAT or PMT. If the PID is not a PAT packet or a PMT packet, the process proceeds to step S4. If the packet is a PAT packet or a PMT packet, the process proceeds to step S3-2. In any case, step S3-1 outputs the packet and the PID for each packet.

  In step S3-2, a section is constructed from the packet received from step S3-1.

  If the constructed section is determined from the PID for each packet and is a PAT, the PMT PID is acquired from the constructed section, and it is determined whether or not it matches the PMT PID recorded in the recording unit as analyzed. If it matches the PMT PID recorded in the recording unit as analyzed, the PMT PID is not passed to step S3-3 as the analyzed PMT PID. If it does not match the PMT PID recorded in the recording unit as analyzed, the PMT PID is passed to step S3-3 as an unanalyzed PMT PID. In either case, the packet and the PID for each packet are passed to step S4.

  If the constructed section is determined from the PID for each packet and is a PMT, the ES PID is acquired from the constructed section, and it is determined whether or not it matches the ES PID recorded in the recording unit as analyzed. If it matches the ES PID recorded in the recording unit as analyzed, the ES PID is not passed to step S3-3 as the analyzed ES PID. If it does not match the ES PID recorded in the recording unit as analyzed, the ES PID is passed to step S3-3 as an unanalyzed ES PID. In either case, the packet and the PID for each packet are passed to step S4.

  In step S3-3, if the PID received from step S3-2 is a PMT PID, the deletion target PMT PID and the section editing target PMT PID recorded in the recording unit are updated and recorded in the recording unit. If the PID received from step S3-2 is an ES PID, the deletion target ES PID recorded in the recording unit is updated and recorded in the recording unit.

  In step S4, the packet and the PID for each packet are received and a filtering process is performed. In step S4, it is confirmed from the PID for each packet passed from step S3-1 or S3-2 whether it matches the PID of the packet type to be deleted recorded in the recording unit in advance. When the PID for each packet passed from step S3-1 or S3-2 is equal to the PID of any of the deletion target packet types, the packet passed from step S3-1 or S3-2 is the deletion target packet. And proceed to step S11. In step S11, the packet is discarded (replaced with a NULL packet), passed to step S8, and stored.

  The TS packets to be deleted are independent data broadcast ES and independent data broadcast PSI / SI for TS separation / section editing apparatus # 1, and TV ES and TV PSI / SI for TS separation / section editing apparatus # 2. .

  If the PID for each packet passed from step S3-1 or S3-2 is not equal to any of the PIDs of the deletion target packet type, the packet passed from step S3-1 or S3-2 is the deletion target packet. It is determined that it is not. In this case, step S4 passes the packet and the PID for each packet to step S5.

  As shown in FIG. 7, the deletion target packet type in the TV broadcast TS separation / section editing apparatus # 1 is a PID packet indicating “independent data broadcast ES” and “data broadcast PSI / SI”. . In addition, the type of packet to be deleted in the TS separation / section editing apparatus # 2 for independent data broadcasting indicates “TVES”, “caption”, “text super”, “TVPSI / SI”, and “linked data broadcasting ES”. It is assumed that the packet is a PID. In FIG. 7, a packet labeled “deleted” is a packet to be deleted.

  In step S5, based on the PID information of the section editing target packet type recorded in advance in the recording unit, it is determined whether or not the packet corresponds to a packet for section editing.

  At this time, if the PID for each packet passed from step S4 is equal to the PID of the section edit target packet type, it is determined that the packet passed from step S4 is the edit target packet. If the PID for each packet passed from step S4 is not equal to the PID of the section edit target packet type, it is determined that the packet passed from step S4 is not an edit target packet.

  The TS packets subject to section editing are PAT (Program Association Table), PMT (Program Map Table), CAT (Conditional Access Table), SDT (Service Description Table, EIT), NIT (Network Information Table, EIT). ) The section-edited TS packet is passed to step S6. TS packets that are not subject to section editing are transferred to step S8 and stored. In step S6, the payload information of the input TS packet is extracted and sectioned.

  The sectioned TS packet is edited based on “section editing contents accompanying TS separation” shown in FIG. 8 and “section editing item list accompanying change of viewing restriction method” shown in FIG. 9, and passed to step S7. .

  Note that FIG. 8 shows a TS separation / section editing apparatus # 1 for TV broadcasting and a TS separation / section editing apparatus # 2 for independent data broadcasting in order to ensure consistency of data contents as TS separation is performed. The relationship between the type of packet to be edited and the editing content is shown.

  In step S7, the edited section is converted into a TS packet again and passed to step S8. In step S8, multiplexing is performed in the order of early transmission time among the packet subjected to NULL replacement, the TS packet edited, and the TS packet not edited.

  Next, in the case of the TS separation / section editing apparatus # 1 in step S 9, the multiplexed TS packet is output to the multiplexing apparatus 105. In the case of the TS separation / section editing apparatus # 2 in step S10, the multiplexed packet is output to the IP transmission apparatus 106.

  Also, the present invention can be realized by configuring some or all of the functions of each means in the TS separation / section editing apparatus of the present embodiment by a computer program and executing the program using the computer. It goes without saying that the procedure in the TS separation / section editing method of the embodiment can be configured by a computer program and the program can be executed by the computer, and the computer can read the program for realizing the function by the computer. Recording media such as FD (Floppy (registered trademark) Disk), MO (Magneto-Optical disk), ROM (Read Only Memory), memory card, CD (Compact Disk) -ROM, DVD (Dig) It is possible to record, save, and distribute in an ital Versatile Disk) -ROM, CD-R, CD-RW, Blu-ray Disk (registered trademark), HDD, removable disk or the like. It is also possible to provide the above program through a network such as the Internet or electronic mail.

  As described above, according to the present embodiment, the transmission capacity per one TS can be reduced by separating the digital broadcast TS into two TSs, the TV broadcast TS and the independent data broadcast TS.

  Also, unlike conventional systems, since redundant packets repeatedly transmitted among data packets are not deleted, data broadcasting can be received immediately after channel selection while reducing transmission capacity.

10. Digital broadcasting TS
DESCRIPTION OF SYMBOLS 11,104a ... TS separation / section editing device for TV broadcasting 12,104b ... TS separation / section editing device for independent data broadcasting 13 ... TV broadcasting TS
14 ... Independent data broadcasting TS
DESCRIPTION OF SYMBOLS 101 ... Demodulation apparatus 102 ... Signal distribution apparatus 103 ... Video code conversion apparatus 104a ... TS separation / section editing apparatus # 1 for TV broadcasting
104b ... TS separation / section editing apparatus # 2 for independent data broadcasting
105: Multiplexing device 106: IP transmission device

Claims (7)

A TV broadcast TS separation / section editing means for extracting only a TV broadcast TS used for a TV broadcast service from a digital broadcast TS (Transport Stream);
A TS separation / section editing device comprising: an independent data broadcasting TS separation / section editing means for extracting only the independent data broadcasting TS used for the independent data broadcasting service from the digital broadcasting TS.   The TS separation / section editing means for TV broadcasting and independent data broadcasting deletes unnecessary ES (Elementary Stream) and sections, and at the same time, PSI (Program Specific Information) / SI (Service Information) section related The TS separation / section editing apparatus according to claim 1, wherein each of the TS separation / section editing apparatuses has a function of correcting a parameter.   3. The TS separation / section editing means for TV broadcasting and independent data broadcasting each further has a function of correcting a PSI / SI section in accordance with a change in a viewing restriction method. The TS separation / section editing device described. A first TS separation / section editing step in which a TV broadcast TS separation / section editing means extracts only a TV broadcast TS used for a TV broadcast service from a digital broadcast TS (Transport Stream);
The TS separation / section editing means for independent data broadcasting includes a second TS separation / section editing step for extracting only the TS for independent data broadcasting used for the independent data broadcasting service from the digital broadcasting TS. Characteristic TS separation / section editing method.   In the first and second TS separation / section editing steps, unnecessary ES (Elementary Stream), modification of related parameters of PSI (Program Specific Information) / SI (Service Information) section in accordance with deletion and deletion of sections respectively. The TS separation / section editing method according to claim 4, wherein the TS separation / section editing method is executed.   6. The TS separation / section editing according to claim 5, wherein each of the first and second TS separation / section editing steps further performs a modification of a PSI / SI section according to a change in a viewing restriction method. Method.   A TS separation / section editing program for causing a computer to function as each means according to any one of claims 1 to 3.

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