JP2019087958A - Broadcast retransmission device, broadcast retransmission method, and monitor method - Google Patents

Abstract

To improve maintainability in a configuration of receiving a broadcast wave including program information and retransmitting it to another device.SOLUTION: A broadcast retransmission device is used for an advanced broadband satellite digital broadcast. The broadcast retransmission device includes: an IP conversion unit for generating and transmitting an IP packet storing data of a TLV packet included in a broadcast wave; and an ASI output connector for outputting, to the outside, an ASI system signal including a plurality of division packets with fixed length in which the data of the TLV packet is divided and stored.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a broadcast retransmission apparatus, a broadcast retransmission method, and a monitoring method.

  Conventionally, techniques for transmitting content using an MMTP (MPEG Media Transport Protocol) packet have been developed.

  For example, in Non-Patent Document 1 (ARIB STD-B32 version 3.4, "Video Coding, Audio Coding and Multiplexing Method in Digital Broadcasting," Radio Industry Association of Japan, September 30, 2015), A broadcast system using the MMT method is disclosed.

  In this broadcast system, an MMT packet including program information such as audio information and video information is stored in the payload of the IP packet. The IP packet is stored in the payload of a TLV (Type Length Value) packet.

  Moreover, the following techniques are disclosed by patent document 1 (Unexamined-Japanese-Patent No. 2013-175949). That is, it is a transmitting device that multiplex-transmits variable-length packets in a frame consisting of a plurality of slots for packet allocation to which TS (Transport Stream) packets are allocated and one slot for header information, and has the same size as the TS packets to be transmitted. A variable-length packet division unit that generates a third packet of a packet length, divides the variable-length packet to be transmitted, and sequentially allocates data of the divided variable-length packets to the third packet; Arrangement position for indicating relative arrangement positions in the frame regarding the TS packet and the third packet to transmit the TS packet and the third packet in a frame having a plurality of packet arrangement slots Information and head position information for indicating the head position of the variable-length packet A multiplex frame header generation unit for generating multiplex frame header information, and a slot of one multiplex frame header information in one frame, and the TS packet and the third packet are for packet arrangement of the one frame It comprises a multiplexing unit arranged and multiplexed for each slot and configured as a plurality of TS multiplex frames, and a transmission unit for transmitting the multiplexed signal of the plurality of TS multiplex frames to the outside.

JP, 2013-175949, A

ARIB STD-B32 version 3.4, "Video Coding, Audio Coding and Multiplexing in Digital Broadcasting", Japan Radio Industry Association, September 30, 2015 International Telecommunication Union Radiocommunications Sector, "Recommendation ITU-R BT. 1869", March 2010, [online], [October 12, 2017 search], Internet <URL: http: // www. itu. int / dms_pubrec / itu-r / rec / bt / R-REC-BT. 1869-0201003-I! ! PDF-E. pdf> "JCTEA STD-002-6.1 Digital Wired Television Broadcasting Multiplexer", Japan CATV Technology Association, February 13, 2017

  For example, in the case of performing an IP retransmission service for transmitting advanced wideband satellite digital broadcast to a subscriber's home via an IP (Internet Protocol) TV transmission network, a broadcast wave including an MMT packet is received and the received MMT packet is IP A configuration is conceivable in which the packet is stored in a packet and retransmitted to the home apparatus in the subscriber home.

  When maintenance of such a device, for example, storage and analysis of retransmitted data, etc., an IP packet transmitted by the device is received and stored by a general-purpose server or the like, and data contained in the IP packet is reproduced. A method of analysis etc. can be considered.

  However, such processing includes various overheads such as reading of data from the hard disk, and for example, the time required for reading may not be constant, and in such a case, processing of packets in the broadcast retransmission apparatus It becomes difficult to reproduce accurately.

  This invention was made in order to solve the above-mentioned subject, and the purpose can improve maintainability in the composition which receives the broadcast wave containing the information on a program, and it retransmits to another device. To provide a broadcast re-transmission apparatus, a broadcast re-transmission method, and a monitoring method.

  (1) In order to solve the above problems, a broadcast retransmission apparatus according to an aspect of the present invention is a broadcast retransmission apparatus used for advanced broadband satellite digital broadcasting, and is configured to transmit data of TLV packets included in broadcast waves. An ASI output connector for externally outputting an ASI signal including a plurality of divided packets of fixed length in which data of the TLV packet is divided and stored, and an IP conversion unit that generates and transmits the stored IP packet And

  (4) In order to solve the above problems, a broadcast retransmission method according to an aspect of the present invention is a broadcast retransmission method in a broadcast retransmission apparatus used for advanced broadband satellite digital broadcasting, which is included in broadcast waves Generating a plurality of divided packets of fixed length obtained by dividing and storing TLV packet data; outputting an ASI signal including the generated each divided packet to the outside; and storing data of the TLV packet And generating the transmitted IP packet.

  (5) In order to solve the above problems, a monitoring method according to an aspect of the present invention is used for advanced broadband satellite digital broadcasting, and generates and transmits an IP packet storing data of TLV packets included in broadcast waves. Outputting, from the broadcast retransmitting apparatus, an ASI signal including a plurality of divided packets of fixed length stored by dividing and storing the data of the TLV packet from the output ASI signal Generating an ASI signal including one or more of the divided packets and inputting the signal to another device; generating an IP packet storing the divided packet included in the input ASI signal; Sending from the device of

  The present invention can be realized not only as a broadcast retransmission apparatus including such a characteristic processing unit, but also as a program for causing a computer to execute the steps of such characteristic processing. Further, the present invention can be realized as a semiconductor integrated circuit that realizes part or all of a broadcast retransmission apparatus, or can be realized as a system including a broadcast retransmission apparatus.

  According to the present invention, maintainability can be improved in a configuration in which a broadcast wave including program information is received and retransmitted to another device.

FIG. 1 is a diagram showing the configuration of a broadcast retransmission system according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of a protocol stack of data transmitted by a broadcast wave in the broadcast retransmission system according to the embodiment of the present invention. FIG. 3 is a diagram showing an example of a TLV packet transmitted by a broadcast wave in the broadcast retransmission system according to the embodiment of the present invention. FIG. 4 is a diagram illustrating another example of a protocol stack of data transmitted by a broadcast wave. FIG. 5 is a view showing an example of a TS packet transmitted by a broadcast wave. FIG. 6 is a diagram showing the configuration of a broadcast retransmission apparatus according to an embodiment of the present invention. FIG. 7 is a diagram showing an example of a TLV packet division method performed in the broadcast retransmission apparatus according to the embodiment of the present invention. FIG. 8 is a diagram showing an example of the format of the TS packet shown in FIG. FIG. 9 is a diagram showing a detailed configuration of a broadcast retransmission apparatus according to an embodiment of the present invention. FIG. 10 is a flowchart defining an operation procedure when the broadcast retransmission apparatus in the broadcast retransmission system according to the embodiment of the present invention retransmits a broadcast wave. FIG. 11 is a flowchart defining an operation procedure of monitor processing in the broadcast retransmission system according to the embodiment of the present invention.

  First, the contents of the embodiment of the present invention will be listed and described.

  (1) A broadcast retransmission apparatus according to an embodiment of the present invention is a broadcast retransmission apparatus used for advanced broadband satellite digital broadcasting, and generates an IP packet storing data of TLV packets included in a broadcast wave. And an ASI output connector for externally outputting an ASI signal including a plurality of divided packets of fixed length in which data of the TLV packet is divided and stored.

  As described above, in an apparatus for generating and transmitting an IP packet storing data of variable-length TLV packets included in a broadcast wave, an ASI signal including fixed-length divided packets obtained by dividing TLV packet data is externally output. The configuration provided with an ASI output connector for outputting to a device widely used in maintenance of broadcast re-sending device, for example, storage and analysis of re-sent data, etc. is adapted to a device for capturing an ASI signal, for example. Data in the following format can be output to the outside. Thus, the measurement system can be easily constructed at low cost. Then, not the IP packet transmitted by the broadcast retransmission apparatus to the network, but the divided packet of fixed length in which the data of the TLV packet is divided and stored is outputted from the broadcast receiving apparatus, and the recording and reproduction are performed. Not affected by the storage of divided packets in packets and the effects of various overheads on general-purpose servers that receive such IP packets, and also affected by fluctuations and omissions of IP packet transmission time in the network Recording and reproduction can be performed easily and with high time accuracy. As a result, for example, the recording of the abnormal phenomenon and the reproduction of the abnormal phenomenon can be accurately performed, so that the abnormal part can be easily identified. Therefore, maintainability can be improved in the configuration in which a broadcast wave including information on a program is received and retransmitted to another device.

  (2) Preferably, the IP conversion unit generates and transmits an IP packet storing the divided packet.

  As described above, according to the configuration in which the ASI signal including the same split packet as the split packet supplied to the IP conversion unit is output from the ASI output connector to the outside, it is necessary to separately provide a split unit that generates the split packet from the TLV packet Also, since the divided packets stored in the IP packet can be recorded or reproduced in the broadcast retransmission apparatus, the maintainability can be further improved.

  (3) Preferably, the broadcast retransmission apparatus further includes an ASI input connector for externally inputting an ASI signal including the divided packet.

  With such a configuration, for example, an IP packet having the same content as an IP packet transmitted by the broadcast retransmission apparatus to the network can be transmitted to a network different from the destination network of the IP packet by the broadcast reception apparatus. A work environment such as maintenance and failure analysis of the broadcast retransmission apparatus can be easily constructed. For example, without connecting a maintenance device such as a recording device to a dedicated network for providing a broadcast service to a subscriber's house that has made a broadcast contract, broadcast re-transmission is performed via another relatively relaxed network. It is possible to perform operations such as maintenance of the transmission apparatus and failure analysis.

  (4) A broadcast retransmission method according to an embodiment of the present invention is a broadcast retransmission method in a broadcast retransmission apparatus used for advanced broadband satellite digital broadcasting, which divides data of TLV packets contained in broadcast waves. Generating a plurality of divided packets of fixed length stored therein; outputting an ASI signal including the generated divided packets to the outside; generating an IP packet storing data of the TLV packet; And sending.

  As described above, in an apparatus for generating and transmitting an IP packet storing data of variable-length TLV packets included in a broadcast wave, an ASI signal including fixed-length divided packets obtained by dividing TLV packet data is externally output. By outputting to the outside, data provided in a form widely applied to maintenance of the broadcast retransmitter, for example, storage and analysis of retransmitted data, etc. It can be output. Thus, the measurement system can be easily constructed at low cost. Then, not the IP packet transmitted by the broadcast retransmission apparatus to the network, but the divided packet of fixed length in which the data of the TLV packet is divided and stored is outputted from the broadcast receiving apparatus, and the recording and reproduction are performed. Not affected by the storage of divided packets in packets and the effects of various overheads on general-purpose servers that receive such IP packets, and also affected by fluctuations and omissions of IP packet transmission time in the network Recording and reproduction can be performed easily and with high time accuracy. As a result, for example, the recording of the abnormal phenomenon and the reproduction of the abnormal phenomenon can be accurately performed, so that the abnormal part can be easily identified. Therefore, maintainability can be improved in the configuration in which a broadcast wave including information on a program is received and retransmitted to another device.

  (5) A monitoring method according to an embodiment of the present invention is a broadcast re-transmission apparatus which is used for advanced broadband satellite digital broadcasting and generates and transmits an IP packet storing data of TLV packets contained in broadcast waves, Outputting an ASI signal including a plurality of divided packets of fixed length stored by dividing the data of the TLV packet, and one or more of the divided packets acquired from the output ASI signal Generating an ASI signal including the signal to be input to another device, generating an IP packet storing the divided packet included in the input ASI signal, and transmitting the IP packet from the other device. including.

  As described above, in an apparatus for generating and transmitting an IP packet storing data of variable-length TLV packets included in a broadcast wave, an ASI signal including fixed-length divided packets obtained by dividing TLV packet data is externally output. By outputting to the outside, data provided in a form widely applied to maintenance of the broadcast retransmitter, for example, storage and analysis of retransmitted data, etc. It can be output. Thus, the measurement system can be easily constructed at low cost. Then, not the IP packet transmitted by the broadcast retransmission apparatus to the network, but the divided packet of fixed length in which the data of the TLV packet is divided and stored is outputted from the broadcast receiving apparatus, and the recording and reproduction are performed. Not affected by the storage of divided packets in packets and the effects of various overheads on general-purpose servers that receive such IP packets, and also affected by fluctuations and omissions of IP packet transmission time in the network Recording and reproduction can be performed easily and with high time accuracy. As a result, for example, the recording of the abnormal phenomenon and the reproduction of the abnormal phenomenon can be accurately performed, so that the abnormal part can be easily identified. Also, for example, since the IP packet having the same content as the IP packet transmitted to the network by the broadcast retransmission apparatus can be transmitted to a network different from the destination network of the IP packet by the broadcast reception apparatus, the broadcast retransmission apparatus Work environment such as maintenance and failure analysis can be easily constructed. For example, without connecting a maintenance device such as a recording device to a dedicated network for providing a broadcast service to a subscriber's house that has made a broadcast contract, broadcast re-transmission is performed via another relatively relaxed network. It is possible to perform operations such as maintenance of the transmission apparatus and failure analysis. Therefore, maintainability can be improved in the configuration in which a broadcast wave including information on a program is received and retransmitted to another device.

  Hereinafter, embodiments of the present invention will be described using the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters and description thereof will not be repeated. In addition, at least a part of the embodiments described below may be arbitrarily combined.

  FIG. 1 is a diagram showing the configuration of a broadcast retransmission system according to an embodiment of the present invention.

  Referring to FIG. 1, the broadcast retransmission system 301 includes a broadcast retransmission apparatus 101 and a plurality of IP broadcast reception apparatuses 202.

  The broadcast retransmission system 301 is not limited to the configuration including the plurality of IP broadcast reception devices 202, and may be configured to include one IP broadcast reception device 202.

  The broadcast retransmission apparatus 101 and the router 121 are provided, for example, in the IPTV center 251.

  An ONU (Optical Network Unit) 122, an STB 131, a TV receiver 132, and a TV monitor 133 are provided at a subscriber's home. The STB 131 and the TV receiver 132 include an IP broadcast receiver 202.

  For example, an external antenna 81 is connected to the broadcast retransmission apparatus 101. The broadcast retransmission apparatus 101 receives, for example, a broadcast wave including a stream.

  The stream contains program information and the like. Program information includes, for example, audio information, video information, EPG (Electronic Program Guide) information, SI information (Service Information), subtitle information, and the like.

  Audio information and video information are, for example, compressed and encrypted according to a predetermined method.

  The broadcast retransmission apparatus 101 receives, for example, a broadcast wave transmitted from a broadcast satellite for advanced broadband satellite digital broadcast (not shown) for relaying a stream from a broadcast station via the external antenna 81.

  The broadcast retransmission apparatus 101 may receive the broadcast wave transmitted from the radio tower via the external antenna 81, for example.

  FIG. 2 is a diagram showing an example of a protocol stack of data transmitted by a broadcast wave in the broadcast retransmission system according to the embodiment of the present invention. In FIG. 2, a protocol stack using TLV packets is shown.

  Referring to FIG. 2, TLV packets are often used for transmissions such as 4K UHDTV (Ultra High Definition Television) or 8K UHDTV according to a standard such as 2160p or 4320p, for example.

  In the example shown in FIG. 2, the broadcast wave includes, for example, TMCC information, AC information, and TLV packets.

  FIG. 3 is a diagram showing an example of a TLV packet transmitted by a broadcast wave in the broadcast retransmission system according to the embodiment of the present invention. FIG. 3 is an example of a packet having a header in which information indicating a data type is stored, Non-Patent Document 2 (International Telecommunication Union Radiocommunications Sector, “Recommendation ITU-R BT. 1869”, March 2010, [ online, [October 12, 2017 search], Internet <URL: http://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT. 1869-0-201003- The format of the TLV packet according to the standard of I !! PDF-E.pdf> is shown.

  The TLV packet includes a TLV header and a TLV payload. The TLV header includes a "start code" field storing a value of "01", a "future reservation" field, a "packet type" field, and a "length" field, and the lengths of these fields Are 2 bits, 6 bits, 8 bits and 16 bits, respectively.

  In the field of “packet type”, values such as “0x01”, “0x02”, “0x03” or “0xFF” are stored. Here, a number beginning with “0x” means that the numbers following “0x” are represented in hexadecimal.

  When “0x01” is stored in the “packet type” field, the TLV packet 61 includes an IPv4 packet which is the total data length of the values stored in the “length” field in the TLV payload.

  Also, when “0x02” is stored in the field of “packet type”, the TLV packet 62 includes an IPv6 packet which is the total data length of the values stored in the field of “length” in the TLV payload.

  Also, when “0x03” is stored in the field of “packet type”, the TLV packet 63 includes an IP packet that is the total data length of the values stored in the field of “length” in the TLV payload. The compressed IP packet is, for example, an IP packet in which an IP header is compressed.

  When “0xFF” is stored in the “packet type” field, the TLV packet 64 includes null data which is the total data length of the values stored in the “length” field in the TLV payload. Hereinafter, a TLV packet including null data in the TLV payload is also referred to as a TLV null packet.

  Here, in the broadcast wave, such a TLV null packet for bit rate adjustment is inserted in order to set the fixed bit rate according to the transmission apparatus of the broadcast wave. Therefore, the amount of data transmitted by the TLV packet in the broadcast wave is larger than the amount of data of program information.

  Referring back to FIG. 2, for example, NTP (Network Time Protocol) data for time synchronization, IP-SI data, time information, MMT packet, or data transmission method is stored in UDP (User Datagram Protocol) / IP packet. Be done. The MMT packet stores video information, audio information, MMT-SI data, and other information.

  The TLV packets 61 to 63 store such UDP / IP packets.

  FIG. 4 is a diagram illustrating another example of a protocol stack of data transmitted by a broadcast wave. In FIG. 4, a protocol stack using TS (Transport Stream) packets is shown.

  Referring to FIG. 4, TS packets are often used for transmissions such as HDTV or Standard Definition Television (SDTV) in accordance with standards such as 1080i, 720p or 480p. The TS packet may be used for transmission such as 4K UHDTV or 8K UHDTV.

  In the example shown in FIG. 4, the broadcast wave includes, for example, TMCC information, AC information, and TS packets.

  FIG. 5 is a view showing an example of a TS packet transmitted by a broadcast wave. The format of the TS packet is shown in FIG.

  The TS packet includes a TS header and a TS payload. The TS header includes a field of “synchronization byte” in which the value “0x47” is stored and a field for storing “PID (Packet ID) etc.”, and the length of these fields is, for example, 1 octet and It is 3 octets. The TS payload includes, for example, a field of “payload” for storing all or part of PES (Packetized Elementary Stream) or all or part of a section. The length of this field is, for example, 184 octets.

  Referring back to FIG. 4, PCR (Program Clock Reference) data is stored, for example, in a TS packet. Also, for example, video information, audio information, subtitle information, and a timeline are stored in a PES packet.

  Also, for example, PSI-SI data and part of AIT (Application Information Table) are included in the section. In addition, the rest of the AIT, the application HTMLS and the content download, which are transmitted by the data carousel method, are included in the section.

  Again referring to FIG. 1, the broadcast retransmitting apparatus 101 acquires program information from the broadcast wave, and stores the acquired program information in an IP packet. Then, the broadcast retransmission apparatus 101 transmits an IP packet (hereinafter also referred to as a distribution IP packet) including information of a program to each subscriber home.

  Here, the broadcast retransmission apparatus 101 sets, for example, the destination of the distribution IP packet to an IP multicast address that reaches a plurality of subscriber homes, and transmits the IP multicast address to the router 121.

  The router 121 is, for example, an IP multicast router, and when receiving the distribution IP packet from the broadcast retransmission apparatus 101, the received distribution IP packet is transferred to an IPTV transmission network (CDN: Content Delivery Network), which is an example of a communication line. Send to 451. In the IPTV transmission network 451, for example, distribution IP packets are transmitted according to the IP protocol. The communication line may be another communication line such as the Internet.

  Further, in the IPTV center 251, an OLT (Optical Line Terminal) may be provided instead of the router 121.

  The ONU 122 receives, for example, a distribution IP packet transmitted from the broadcast retransmission apparatus 101 by a communication service of FTTH (Fiber To The Home).

  More specifically, the ONU 122 is a home-side device in, for example, GPON (Gigabit Passive Optical Network) and GE-PON (Gigabit Ethernet (registered trademark) -PON).

  When the ONU 122 receives the distribution IP packet from the IPTV transmission network 451 via the optical communication line, the ONU 122 transmits the received distribution IP packet to the STB 131 and the TV receiver 132.

  Upon receiving the distribution IP packet from the ONU 122, the IP broadcast receiving apparatus 202 in the STB 131 acquires program information from the received distribution IP packet, and decodes audio information and video information based on the acquired program information, The decoded audio information and video information are transmitted to the TV monitor 133.

  The TV monitor 133 reproduces the program based on the audio information and the video information received from the STB 131.

  Also, the IP broadcast receiving apparatus 202 in the TV receiver 132 reproduces the program in the speaker module and the display module in its own TV receiver 132 using the audio information and the video information decoded in the same manner.

  FIG. 6 is a diagram showing the configuration of a broadcast retransmission apparatus according to an embodiment of the present invention.

  With reference to FIG. 6, the broadcast retransmission apparatus 101 includes chassis K1 and K2, an ASI output connector 1, an IP output connector 2, an ASI input connector 3, an IP output connector 4, and a demodulator 11. The TLV division unit 12, an IP conversion unit 13, an ASI output unit 14, an ASI input unit 41, and an IP conversion unit 42 are provided. The broadcast retransmission apparatus 101 may not include the housing K 2, the ASI input connector 3, the IP output connector 4, the ASI input unit 41, and the IP conversion unit 42. For example, the case K2, the ASI input connector 3, the IP output connector 4, the ASI input unit 41, and the IP conversion unit 42 are provided outside the broadcast retransmission apparatus 101 as other devices. It is also good.

  The ASI output connector 1 and the IP output connector 2 are provided in the housing K1. The housing K1 accommodates the demodulation unit 11, the TLV division unit 12, the IP conversion unit 13, and the ASI output unit 14.

  The ASI input connector 3 and the IP output connector 4 are provided in the housing K2. The case K2 accommodates the ASI input unit 41 and the IP conversion unit 42.

  The demodulation unit 11 receives a broadcast wave, acquires a TLV packet included in the received broadcast wave, and outputs the TLV packet to the TLV division unit 12.

  The TLV division unit 12 divides data of one or a plurality of TLV packets received from the demodulation unit 11 to generate a plurality of divided packets of fixed length, for example, TS packets. Note that the TLV division unit 12 may be configured to generate a packet of another format as a divided packet.

  The IP conversion unit 13 generates and transmits an IP packet storing data of a TLV packet included in a broadcast wave. For example, the IP conversion unit 13 generates and transmits an IP packet storing a predetermined number of the divided packets.

  More specifically, the IP conversion unit 13 generates an IP packet storing the divided packet received from the TLV division unit 12 and transmits the IP packet to the IP network 401 such as an IPTV transmission network via the IP output connector 2. That is, the IP output connector 2 is a connector for outputting the IP packet generated by the IP conversion unit 13 to the outside of the housing K1.

  The ASI output unit 14 generates an ASI signal which is an ASI (Asynchronous Serial Interface) signal including the divided packets received from the TLV division unit 12, and transmits the ASI signal to the recording device 151 via the ASI output connector 1.

  That is, the ASI output connector 1 is a connector for outputting an ASI signal including a plurality of divided packets of a fixed length in which data of a TLV packet is divided and stored. More specifically, the ASI output connector 1 is a connector for outputting an ASI signal including each TS packet generated by the TLV division unit 12 to the outside of the housing K1.

  The ASI output connector 1 is connected to a device capable of processing divided packets such as TS packets. That is, the recording device 151 acquires a divided packet included in the ASI signal received from the broadcast retransmission device 101, and records the acquired divided packet in a predetermined file format, for example.

  The reproduction device 152 receives the file recorded by the recording device 151 via the recording medium or the like, and acquires a divided packet which is data of the received file. Then, the reproduction device 152 generates an ASI signal including the acquired divided packet, and transmits the ASI signal to the case K2.

  The divided packets input to the ASI input connector 3 may be part of the divided packets output from the ASI output connector 1.

  Also, the recording device 151 and the reproducing device 152 may be an integrated device, or may be configured to automatically exchange the file.

  The ASI input unit 41 acquires divided packets included in the ASI signal received via the ASI input connector 3 and outputs the divided packets to the IP conversion unit 42.

  That is, the ASI input connector 3 is a connector for externally inputting an ASI signal including a divided packet. More specifically, the ASI input connector 3 is a connector for externally inputting an ASI signal including a divided packet of a fixed length into the inside of the housing K2.

  The IP conversion unit 42 generates an IP packet storing the divided packet received from the ASI input unit 41 and transmits the IP packet to the IP network 402 via the IP output connector 4. That is, the IP output connector 4 is a connector for outputting the IP packet generated by the IP conversion unit 42 to the outside of the housing K2.

  The IP conversion unit 42 may be configured to transmit an IP packet to the IP network 401 via the IP output connector 4.

  The cases K1 and K2 may be a common case. In this case, the broadcast retransmission apparatus 101 may not include the IP conversion unit 42, and the IP conversion unit 13 may receive the divided packet output from the ASI input unit 41.

  Further, as described above, when the housings K1 and K2 are housings of separate devices, the recording device 151 and the reproducing device 152 are not provided, and the ASI output connector 1 and the ASI input connector 3 are directly connected. It may be

  FIG. 7 is a diagram showing an example of a TLV packet division method performed in the broadcast retransmission apparatus according to the embodiment of the present invention.

  In FIG. 7, TLV packets described in Non-Patent Document 3 ("JCTEA STD-002-6.0 Digital Wired Television Broadcasting Multiplexer", Japan CATV Technology Association) are converted into a plurality of TS packets. The way to store is shown.

  FIG. 8 is a diagram showing an example of the format of the TS packet shown in FIG.

  Referring to FIGS. 7 and 8, TLV division unit 12 generates a plurality of fixed packets having a predetermined size, each including data obtained by dividing the TLV packet. Here, the TS packet has a size of 188 bytes and is an example of a fixed packet.

  Referring again to FIG. 6, as described above, ASI signals including divided packets, ie, TS packets, are transmitted to recording device 151 via ASI output connector 1, and divided packets recorded in recording device 151, ie, The TS packet is provided to the playback device 152.

  This makes it possible to utilize the conventional MPEG2-TS technology system for maintenance of the broadcast retransmission apparatus 101, for example, storage and analysis of retransmitted data. That is, although apparatuses capable of processing TS packets are widely provided, such apparatuses can be used as the recording apparatus 151 and the reproducing apparatus 152, so that the measurement system can be easily constructed at low cost.

  Then, the broadcast retransmission apparatus 101 causes the broadcast retransmission apparatus 101 to output not a IP packet that the broadcast retransmission apparatus 101 transmits to the IP network 401, but a TS packet that is a division packet of fixed length in which data of the TLV packet is divided and stored. And playback, without being affected by the storage of the TS packet in the IP packet and various overheads in a general-purpose server that receives the IP packet, and the fluctuation of the IP packet transmission time in the network Recording and reproduction can be performed easily and with high time accuracy without being affected by defects and the like.

  Therefore, packet processing and the like in the broadcast retransmission apparatus 101 can be accurately reproduced. Specifically, it is possible to accurately reproduce the flow of data such as TS packets in the broadcast retransmission apparatus 101, that is, the timing and the data content. As a result, for example, the recording of the abnormal phenomenon and the reproduction of the abnormal phenomenon can be accurately performed, so that the abnormal part can be easily identified.

  Also, as described above, an ASI signal including divided packets, that is, TS packets is transmitted to the broadcast retransmission apparatus 101 via the ASI input connector 3.

  Thus, for example, the IP packet storing the TS packet generated in the broadcast retransmission apparatus 101 can be transmitted to the IP network 402 which is a network different from the IP network 401, so maintenance of the broadcast retransmission apparatus 101 can be performed. And work environment such as failure analysis can be easily constructed. That is, without connecting a maintenance device such as a recording device to a dedicated network for providing a broadcast service to a subscriber's house which has signed a broadcast contract, broadcast re-transmission is performed via another network of which various restrictions are relatively eased. Operations such as maintenance of the transmission apparatus 101 and failure analysis can be performed.

  FIG. 9 is a diagram showing a detailed configuration of a broadcast retransmission apparatus according to an embodiment of the present invention.

  Referring to FIG. 9, broadcast retransmission apparatus 101 acquires demodulator 11, TLV divider 12, IP converter 13, ASI output unit 14, high-accuracy oscillator 15, counter 16, and NTP packet acquisition. A unit 17 and a conversion unit 18 are provided. The TLV division unit 12 includes a deletion unit 21 and a TS generation unit 22. The IP conversion unit 13 includes a TTS generation unit 23, a blocking unit 24, an IP packetization unit 25, and an IP transmission unit 26.

  The high accuracy oscillator 15 generates, for example, a transmitting reference clock. More specifically, the high-accuracy oscillator 15 is, for example, an oscillator that generates a high-precision clock pulse of 27 MHz synchronized with time information included in radio waves transmitted from GPS (Global Positioning System) satellites. The high accuracy oscillator 15 outputs the generated clock pulse to the counter 16.

  The high-accuracy oscillator 15 may be configured to generate a high-precision clock pulse using an OCXO (Oven Controlled Oscillator), a rubidium oscillator, or the like.

  The counter 16 updates the transmission-side count value, for example, in accordance with the timing of the transmission-side reference clock generated in the high-accuracy oscillator 15.

  More specifically, the counter 16 counts clock pulses from the high-accuracy oscillator 15 and holds the transmission-side count value which is the counted value.

  The transmitter count value can represent, for example, Coordinated Universal Time with an accuracy of 27 MHz.

  The broadcast wave in the broadcast retransmission system 301 is, for example, the above-mentioned TLV null packet, a TLV program packet which is a TLV packet including program information, and time setting information for performing time setting between devices using coordinated universal time. And follow the MMT scheme. The NTP data is an example of time setting information.

  The demodulation unit 11 receives a broadcast wave and demodulates the received broadcast wave to generate a stream including a TLV null packet, a TLV program packet, time setting information, and the like.

  More specifically, the demodulation unit 11 receives a broadcast wave via the external antenna 81, and demodulates the received broadcast wave to generate a stream configured of a plurality of TLV packets, and the TLV division unit 12 and The packet is output to the NTP packet acquisition unit 17. In the stream, for example, NTP data is transmitted every 33 milliseconds.

  The TLV division unit 12 divides the TLV packet included in the stream received from the demodulation unit 11 to generate a plurality of divided packets of fixed length.

  The NTP packet acquisition unit 17 receives the stream from the demodulation unit 11, acquires an IP packet (hereinafter, also referred to as an NTP packet) including NTP data from the received stream, and outputs the acquired NTP packet to the conversion unit 18. .

  The conversion unit 18 performs time synchronization on the counter 16 using, for example, NTP data included in the broadcast wave.

  More specifically, the conversion unit 18 receives the NTP packet from the NTP packet acquisition unit 17 and acquires Coordinated Universal Time (UTC) in NTP long format from the NTP data included in the received NTP packet.

  The NTP long format has a 32-bit field indicating seconds and a 32-bit field indicating less than one second.

  The conversion unit 18 holds an equation (hereinafter also referred to as “transmission side conversion equation”) for converting the NTP long format universal time zone into the transmission side count value.

  The difference between the time based on the transmitter count value and the coordinated universal time is acceptable, for example, up to about 500 nanoseconds. Since one count of the transmission side count value corresponds to about 37 nanoseconds, even if the transmission side count value fluctuates by about 10 counts, it falls within the allowable range.

  For example, if the frequency accuracy of the high accuracy oscillator 15 is 1 ppm, it is considered that the transmitter count value shifts by one every approximately 37 milliseconds, so 10 NTP data, that is, the transmitter count value every 330 milliseconds. Can be synchronized to Coordinated Universal Time with sufficient accuracy based on the sender count value.

  In this example, the conversion unit 18 converts the Coordinated Universal Time into the transmission-side count value using the transmission-side conversion formula each time it receives an NTP packet from the NTP packet acquisition unit 17, that is, every 33 milliseconds, Is set in the counter 16.

  In the TLV division unit 12, the deletion unit 21 deletes a TLV null packet from the stream generated by the demodulation unit 11.

  More specifically, the deletion unit 21 monitors the stream received from the demodulation unit 11 and attempts to detect a start code in the TLV header (see FIG. 3).

  When detecting the start code, the deletion unit 21 confirms the value stored in the field of the packet type after the start code.

  When the value stored in the field is 0xFF, the deletion unit 21 determines that the TLV packet including the start code is a TLV null packet, and deletes the TLV packet from the stream.

  On the other hand, when the value stored in the field is a value other than 0xFF, the deletion unit 21 determines that the TLV packet including the start code is not a TLV null packet, and outputs the TLV packet to the TS conversion unit 22. .

  Referring to FIGS. 7 to 9, TS conversion unit 22 has, for example, a buffer for holding unstored data. For example, when the TLV packet 1 (see FIG. 7) is received from the deletion unit 21 in a case where the unstored data is not stored in the buffer, the TS conversion unit 22 receives, for example, 184 bytes from the head of the received TLV packet 1 Data of is acquired as divided data.

  The TS unit 22 adds a 3-byte TS header to the acquired divided data, and a head TLV instruction of 1 byte when a TLV header is present, whereby a TS packet in which the divided data is stored in the payload (Hereinafter, also referred to as TLV stored TS packet), and outputs the generated TLV stored TS packet to the TTS unit 23 and the ASI output unit 14.

  Similarly, each time the TS converter 22 acquires 185 bytes of data from the beginning of the remaining data of the TLV packet 1 as divided data, the TS converter 22 generates a TLV stored TS packet and sends it to the TTS unit 23 and the ASI output unit 14. Output.

  In addition, when the size of the acquired data is less than 185 bytes, the TS conversion unit 22 stores the acquired data as unstored data in the buffer.

  Then, when the TS conversion unit 22 receives the subsequent TLV packet 2 (see FIG. 7) from the deletion unit 21, the unstored data is stored in the buffer, so the size obtained by subtracting the size of the unstored data from 184 bytes Data from the beginning of TLV packet 2.

  The TS forming unit 22 adds the non-stored data to the top of the acquired data, arranges the data of the top TLV instruction and the data of the TLV packet 2 to generate divided data, and then discards the non-stored data in the buffer.

  The TS forming unit 22 adds a TS header to the generated divided data to generate a TLV stored TS packet, and outputs the generated TLV stored TS packet to the TTS forming unit 23 and the ASI output unit 14.

  As described above, by using the TS packet, it is possible to use the TSoverIP recording device, the measuring device, the monitoring device, etc. utilized in the MPEG2-TS technology system.

  Referring to FIG. 9, IP conversion unit 13 converts the TS packet received from TLV division unit 12 into a TTS packet, and is an IP packet storing a predetermined number of TTS packets, and includes an IP header, a UDP header and an RTP header To generate an IP packet containing the

  In the IP conversion unit 13, the TTS generation unit 23 adds, for example, transmission time information indicating the transmission timing of the TLV stored TS packet to the TLV stored TS packet.

  In detail, the TTS unit 23 adds transmission time information indicating the transmission timing of the TLV stored TS packet by the transmission side count value to the TLV stored TS packet.

  More specifically, when the TTS unit 23 receives the TLV stored TS packet from the TS unit 22, the TTS unit 23 acquires the transmission side count value from the counter 16, and obtains the acquired transmission side count value as the TS of the TLV stored TS packet. Add as a time stamp before the header.

  Hereinafter, the TLV stored TS packet to which the time stamp is added is also referred to as a TLV stored TTS (Time-stamped TS) packet.

  The size of the timestamp is a predetermined size, for example 4 bytes. Therefore, the size of the TLV stored TTS packet is 192 bytes of fixed length.

  The TTS unit 23 outputs the generated TLV stored TTS packet to the blocking unit 24.

  The blocking unit 24 accumulates a predetermined number of TLV stored TTS packets received from the TTS unit 23.

  More specifically, for example, 1500 bytes are often used as the MTU (Maximum Transfer Unit) size, and in this case, if seven TLV stored TTS packets are collectively transmitted as one IP packet, the transmission efficiency in the IPTV transmission network 451 Can be enhanced.

  In this example, the blocking unit 24 stores seven TLV stored TTS packets, and then outputs these seven TLV stored TTS packets to the IP packetizing unit 25 as one block data. According to the configuration in which TTS packets are stored, even when a plurality of TS packets are stored in one IP packet, the timing of each TS packet can be easily recognized on the receiving side of the IP packet.

  Note that the blocking unit 24 performs FEC processing to add forward error correction (FEC) packets as additional block data according to the SMPTE 2022 standard (pro MPEG COP3) based on the block data, for example. May be

  When receiving the block data from the blocking unit 24, the IP packetizing unit 25 adds, for example, an RTP (Real-time Transport Protocol) header, a UDP (User Datagram Protocol) header, and an IP header to the received block data. To generate an IP packet, ie, a delivery IP packet.

  The destination IP multicast address in the IP header and the destination port number in the UDP header can be set arbitrarily by the operator. The IP packetizing unit 25 outputs the generated distribution IP packet to the IP transmitting unit 26.

  The IP transmission unit 26 transmits the stream from which the TLV null packet has been deleted by the deletion unit 21 to the IP broadcast receiving apparatus 202 via the IPTV transmission network 451. More specifically, the IP transmission unit 26 transmits the distribution IP packet received from the IP packetization unit 25 to the router 121.

[Flow of operation]
Each device in the broadcast retransmission system 301 includes a computer, and an arithmetic processing unit such as a CPU in the computer reads out a program including a part or all of each step of the following sequence diagram or flowchart from a memory (not shown). Run. The programs of the plurality of devices can be installed from the outside. The programs of the plurality of apparatuses are distributed as stored in the recording medium.

  FIG. 10 is a flowchart defining an operation procedure when the broadcast retransmission apparatus in the broadcast retransmission system according to the embodiment of the present invention retransmits a broadcast wave.

  Referring to FIG. 10, first, broadcast retransmit apparatus 101 receives a broadcast wave, and acquires a variable-length TLV packet included in the received broadcast wave (step S1).

  Next, the broadcast retransmission apparatus 101 divides the acquired TLV packet to generate a plurality of divided packets of fixed length. That is, the broadcast retransmitting apparatus 101 generates a plurality of divided packets of a fixed length in which data of one or a plurality of TLV packets included in a broadcast wave are divided and stored (step S2).

  Next, the broadcast retransmission apparatus 101 generates an ASI signal including the generated divided packets, and transmits the ASI signal to the recording apparatus 151 via the ASI output connector 1 (step S3).

  Next, the broadcast retransmission apparatus 101 generates and transmits an IP packet storing data of the TLV packet. More specifically, the broadcast retransmission apparatus 101 generates an IP packet storing the generated predetermined number of divided packets (step S4), and transmits the IP packet to the IP network 401 via the IP output connector 2 (step S5).

  The operation in step S3 and the operations in steps S4 and S5 may be performed in the reverse order or may be performed in parallel.

  FIG. 11 is a flowchart defining an operation procedure of monitor processing in the broadcast retransmission system according to the embodiment of the present invention.

  Referring to FIG. 11, first, broadcast retransmitting apparatus 101 generates an ASI signal including a plurality of divided packets of fixed length in which data of TLV packets are divided and stored, and is output to the outside. More specifically, the broadcast retransmission apparatus 101 transmits the generated ASI signal to the recording apparatus 151 via the ASI output connector 1 (step S11).

  Next, the recording device 151 acquires a divided packet included in the ASI signal received from the broadcast retransmission device 101, and records the acquired divided packet, for example, in a predetermined file format (step S12).

  Next, the reproduction device 152 generates an ASI signal including one or more divided packets acquired from the recording device 151, and inputs it to another device, that is, transmits it to a target device such as the broadcast retransmission device 101.

  Next, an IP packet storing the divided packet included in the input ASI signal is generated and transmitted from the other device. More specifically, the target device generates an IP packet storing the divided packet received from the reproduction device 152 (step S15), and the network to which the IP conversion unit 13 in the broadcast retransmission device 101 is a transmission destination of the IP packet Transmits to another different network (step S16). Specifically, the IP conversion unit 42 generates an IP packet storing the divided packet received from the playback device 152 (step S15), and transmits the IP packet to the IP network 402 via the IP output connector 4 (step S16).

  In the broadcast retransmission apparatus according to the embodiment of the present invention, the ASI output connector 1 is a connector for outputting an ASI signal including divided packets generated by the TLV dividing unit 12 to the outside of the housing K1. Although not limited to this. In the broadcast retransmission apparatus 101, a division unit for dividing a TLV packet to generate a plurality of divided packets of fixed length is separately provided, and an ASI signal including the divided packets generated by the division unit is received from the ASI output connector 1 It may be configured to be output to the outside of the body K1. Further, the format of the divided packet output from the ASI output connector 1 may be different from the format of the divided packet that the IP conversion unit 13 receives from the TLV division unit 12.

  In the broadcast retransmission apparatus according to the embodiment of the present invention, the IP conversion unit 13 is configured to generate and transmit an IP packet storing a predetermined number of divided packets, but the present invention is limited thereto is not. The number of divided packets stored in the IP packet is not limited to a predetermined number, and may be a number determined according to some conditions.

  In addition, although the broadcast retransmission apparatus according to the embodiment of the present invention is configured to include the deletion unit 21, the present invention is not limited to this. The broadcast retransmission apparatus 101 may not include the deletion unit 21 and may not delete the TLV null packet.

  Although the broadcast retransmission apparatus according to the embodiment of the present invention is configured to include the demodulation unit 11, the present invention is not limited to this. The demodulation unit 11 may be provided outside the broadcast retransmission apparatus 101, and the broadcast retransmission apparatus 101 may be configured to include an acquisition unit that acquires the stream from the external demodulation unit 11.

  Also, although the broadcast retransmission apparatus according to the embodiment of the present invention is configured to add a time stamp to the TLV stored TS packet, the present invention is not limited to this. The broadcast retransmission apparatus 101 may be configured to transmit the TLV stored TS packet by including it in an IP packet without adding a time stamp.

  Although the broadcast retransmission apparatus according to the embodiment of the present invention is configured to include the combination of the 27 MHz high-accuracy oscillator 15 and the counter 16, the present invention is not limited to this. The broadcast retransmission apparatus 101 may be configured to include a set of an oscillator that generates clock pulses at frequencies other than 27 MHz, for example, a 2 ^ n Hertz VCO described in Non-Patent Document 1 and a counter. Here, “a ^ b” means y to the power of x. However, while a broadcast retransmission apparatus equipped with a pair of 2 ^ n Hertz VCO and a corresponding counter is not widely used, a set of a 27 MHz oscillator and a counter 16 is for MPEG2-TS. It is modularized and widely distributed. For this reason, a configuration provided with a combination of a 27 MHz high accuracy oscillator 15 and a counter 16 is preferable.

  Further, in the broadcast retransmission apparatus according to the embodiment of the present invention, the high-accuracy oscillator 15 is configured to be synchronized with time information included in radio waves transmitted from GPS satellites, but in the present invention is limited thereto Absent. The high-accuracy oscillator 15 may be configured to synchronize the high-accuracy oscillator 15 to 27 MHz by feeding back the difference between the coordinated universal time and the transmission-side count value to the high-accuracy oscillator 15 using an NTP packet. . For this feedback, for example, control of an analog PLL (Phase Locked Loop) circuit and various digital clock synthesizers is used.

  By the way, for example, in the case of performing IP retransmission service for transmitting advanced broadband satellite digital broadcast to a subscriber's home through an IPTV transmission network, a broadcast wave including MMT packets is received, and the received MMT packets are stored in IP packets. Then, a configuration may be considered in which re-transmission is made to the in-home apparatus in the subscriber's home.

  When maintenance of such a device, for example, storage and analysis of retransmitted data, etc., an IP packet transmitted by the device is received and stored by a general-purpose server or the like, and data contained in the IP packet is reproduced. A method of analysis etc. can be considered.

  However, such processing includes various overheads such as reading of data from the hard disk, and for example, the time required for reading may not be constant, and in such a case, processing of packets in the broadcast retransmission apparatus It becomes difficult to reproduce accurately.

  Specifically, for example, jitter may occur in the unit of several microseconds in the reproduced IP packet. In addition, when the null packet included in the stream is deleted to reduce the amount of data to be transmitted to the network in the broadcast retransmission apparatus, the transmission rate of the stream fluctuates, and the operation of the broadcast retransmission apparatus is reproduced. It becomes more difficult.

  On the other hand, in the broadcast retransmission apparatus according to the embodiment of the present invention, the IP conversion unit 13 generates and transmits an IP packet storing data of a TLV packet included in a broadcast wave. The ASI output connector 1 is a connector for outputting, to the outside, an ASI signal including a plurality of divided packets of fixed length in which data of the TLV packet is divided and stored.

  As described above, an apparatus for generating and transmitting an IP packet storing data of a variable-length TLV packet included in a broadcast wave externally outputs an ASI signal including a fixed-length divided packet obtained by dividing the data of the TLV packet. Is adapted to a device widely provided in maintenance of the broadcast retransmission apparatus 101, for example, storage and analysis of retransmitted data, for example, an ASI signal capture apparatus. Format data can be output to the outside.

  Thus, the measurement system can be easily constructed at low cost. Then, not the IP packet that the broadcast retransmission apparatus 101 transmits to the network, but the divided packet of fixed length in which the data of the TLV packet is divided and stored is output from the broadcast retransmission apparatus 101 to perform recording, reproduction, etc. , Without being affected by the storage of divided packets in IP packets, and by various overheads in general-purpose servers that receive the IP packets, and by the fluctuation and loss of IP packet transmission time in the network, etc. Recording and reproduction can be performed easily and with high time accuracy without being As a result, for example, the recording of the abnormal phenomenon and the reproduction of the abnormal phenomenon can be accurately performed, so that the abnormal part can be easily identified.

  Therefore, the broadcast retransmission apparatus according to the embodiment of the present invention can improve maintainability in a configuration in which a broadcast wave including information of a program is received and retransmitted to another apparatus.

  Further, in the broadcast retransmission apparatus according to the embodiment of the present invention, the IP conversion unit 13 generates and transmits an IP packet storing the divided packet.

  As described above, according to the configuration in which the ASI signal including the same divided packet as the divided packet supplied to the IP conversion unit 13 is output from the ASI output connector 1 to the outside, it is necessary to separately provide a dividing unit that generates the divided packet from the TLV packet. Also, since the divided packets stored in the IP packet can be recorded or reproduced in the broadcast retransmission apparatus 101, the maintainability can be further improved.

  Further, in the broadcast retransmission apparatus according to the embodiment of the present invention, the ASI input connector 3 is a connector for externally inputting an ASI signal including the divided packet.

  With such a configuration, for example, an IP packet having the same content as an IP packet transmitted to the network by the broadcast retransmission apparatus 101 may be transmitted to a network different from the network to which the IP packet is transmitted by the broadcast retransmission apparatus 101. Since it can do, work environment, such as maintenance of broadcast re-transmission device 101 and fault analysis, can be built easily. For example, without connecting a maintenance device such as a recording device to a dedicated network for providing a broadcast service to a subscriber's house that has made a broadcast contract, broadcast re-transmission is performed via another relatively relaxed network. Operations such as maintenance of the transmission apparatus 101 and failure analysis can be performed.

  Further, in the broadcast retransmission method according to the embodiment of the present invention, first, a plurality of divided packets of fixed length are generated by dividing and storing data of TLV packets included in a broadcast wave. Next, an ASI signal including each generated divided packet is output to the outside. Next, an IP packet storing data of the TLV packet is generated and transmitted.

  As described above, an apparatus for generating and transmitting an IP packet storing data of a variable-length TLV packet included in a broadcast wave externally outputs an ASI signal including a fixed-length divided packet obtained by dividing the data of the TLV packet. Output to a device widely provided in the maintenance of the broadcast re-transmission device 101, for example, storage and analysis of re-transmitted data, etc., for example, data in a form adapted to the ASI signal capture device. can do.

  Thus, the measurement system can be easily constructed at low cost. Then, not the IP packet that the broadcast retransmission apparatus 101 transmits to the network, but the divided packet of fixed length in which the data of the TLV packet is divided and stored is output from the broadcast retransmission apparatus 101 to perform recording, reproduction, etc. , Without being affected by the storage of divided packets in IP packets, and by various overheads in general-purpose servers that receive the IP packets, and by the fluctuation and loss of IP packet transmission time in the network, etc. Recording and reproduction can be performed easily and with high time accuracy without being As a result, for example, the recording of the abnormal phenomenon and the reproduction of the abnormal phenomenon can be accurately performed, so that the abnormal part can be easily identified.

  Therefore, in the broadcast retransmission method according to the embodiment of the present invention, maintainability can be improved in a configuration in which a broadcast wave including information of a program is received and retransmitted to another device.

  Also, in the monitoring method according to the embodiment of the present invention, the broadcast retransmission apparatus 101 first generates and transmits an IP packet that is used for advanced broadband satellite digital broadcasting and stores data of TLV packets included in broadcast waves. Then, an ASI signal including a plurality of divided packets of fixed length in which the data of the TLV packet is divided and stored is output to the outside. Next, an ASI signal including one or more divided packets acquired from the output ASI signal is generated and input to another apparatus. Next, an IP packet storing the divided packet included in the input ASI signal is generated and transmitted from the other device.

  As described above, an apparatus for generating and transmitting an IP packet storing data of a variable-length TLV packet included in a broadcast wave externally outputs an ASI signal including a fixed-length divided packet obtained by dividing the data of the TLV packet. Output to a device widely provided in the maintenance of the broadcast re-transmission device 101, for example, storage and analysis of re-transmitted data, etc., for example, data in a form adapted to the ASI signal capture device. can do.

  Thus, the measurement system can be easily constructed at low cost. Then, not the IP packet that the broadcast retransmission apparatus 101 transmits to the network, but the divided packet of fixed length in which the data of the TLV packet is divided and stored is output from the broadcast retransmission apparatus 101 to perform recording, reproduction, etc. , Without being affected by the storage of divided packets in IP packets, and by various overheads in general-purpose servers that receive the IP packets, and by the fluctuation and loss of IP packet transmission time in the network, etc. Recording and reproduction can be performed easily and with high time accuracy without being As a result, for example, the recording of the abnormal phenomenon and the reproduction of the abnormal phenomenon can be accurately performed, so that the abnormal part can be easily identified.

  Also, for example, since an IP packet having the same content as an IP packet transmitted to the network by the broadcast retransmission apparatus 101 can be transmitted to a network different from the network to which the IP packet is transmitted by the broadcast retransmission apparatus 101, broadcast A work environment such as maintenance and failure analysis of the retransmission apparatus 101 can be easily constructed. For example, without connecting a maintenance device such as a recording device to a dedicated network for providing a broadcast service to a subscriber's house that has made a broadcast contract, broadcast re-transmission is performed via another relatively relaxed network. Operations such as maintenance of the transmission apparatus 101 and failure analysis can be performed.

  Therefore, the monitor method according to the embodiment of the present invention can improve maintainability in a configuration in which a broadcast wave including information of a program is received and retransmitted to another device.

  It should be understood that the above embodiments are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

The above description includes the features described below.
[Supplementary Note 1]
A broadcast retransmission apparatus used for advanced broadband satellite digital broadcasting, comprising:
An IP conversion unit that generates and transmits an IP packet storing data of a TLV (Type Length Value) packet included in a broadcast wave;
And an ASI output connector for outputting an ASI (Asynchronous Serial Interface) signal including a plurality of divided packets of fixed length in which data of the TLV packet is divided and stored.
The TLV packet is of variable length,
The broadcast retransmission apparatus further comprises:
A TLV division unit that divides data of one or more of the TLV packets to generate a plurality of TS packets of a fixed length;
The ASI output connector is a connector for outputting an ASI signal including each of the TS packets generated by the TLV division unit to the outside.
The IP conversion unit converts the TS packet received from the TLV division unit into a TTS packet, and generates an IP packet containing an IP header, a UDP header, and an RTP header, which is an IP packet storing a predetermined number of the TTS packets. Send to the network,
The ASI output connector is connected to an apparatus capable of processing TS packets.

Reference Signs List 1 ASI output connector 2 IP output connector 3 ASI input connector 4 IP output connector 11 demodulation unit 12 TLV division unit 13 IP conversion unit 14 ASI output unit 15 high-accuracy oscillator 16 counter 17 NTP packet acquisition unit 18 conversion unit 21 deletion unit 22 TS Converting unit 23 TTS converting unit 24 Blocking unit 25 IP packetizing unit 26 IP transmitting unit 41 ASI input unit 42 IP converting unit 101 Broadcast retransmission apparatus 202 IP broadcast receiving apparatus 301 Broadcast retransmission system K1, K2 Case

Claims (5)

A broadcast retransmission apparatus used for advanced broadband satellite digital broadcasting, comprising:
An IP conversion unit that generates and transmits an IP packet storing data of a TLV (Type Length Value) packet included in a broadcast wave;
A broadcast retransmission apparatus, comprising: an ASI output connector for outputting an ASI (Asynchronous Serial Interface) signal including a plurality of divided packets of fixed length in which data of the TLV packet is divided and stored.   The broadcast retransmission apparatus according to claim 1, wherein the IP conversion unit generates and transmits an IP packet storing the divided packet. The broadcast retransmission apparatus further comprises:
3. The broadcast retransmission apparatus according to claim 1, further comprising an ASI input connector for externally inputting an ASI signal including the divided packets. A broadcast retransmission method in a broadcast retransmission apparatus used for advanced broadband satellite digital broadcasting, comprising:
Generating a plurality of divided packets of fixed length which are stored by dividing and storing data of TLV packets included in the broadcast wave;
Outputting an ASI signal including the generated divided packets to the outside;
Generating and transmitting an IP packet storing data of the TLV packet. A TDS packet data is divided and stored from a broadcast retransmission apparatus that generates and transmits an IP packet storing TLV packet data included in a broadcast wave, which is used for advanced broadband satellite digital broadcasting. Outputting an ASI signal including a plurality of divided packets to the outside;
Generating an ASI signal including one or more of the divided packets acquired from the output ASI signal and inputting it to another device;
Generating an IP packet storing the divided packet included in the input ASI signal and transmitting it from the other device.

Images