JP2005217844A - Catv retransmission system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify acquisition of program arrangement information for a receiver without the need for an additional apparatus in CATV retransmission by modulation conversion of terrestrial digital broadcasting. <P>SOLUTION: A standby CATV retransmission apparatus 150 automatically collects program arrangement information of all receivable channels of the terrestrial digital broadcasting and transmits the information to a system management apparatus 300. The system management apparatus 300 transmits the collected program arrangement information to active apparatuses 100 and 101, and 102 and 103. The active apparatuses multiplex the received program arrangement information for all the channels on a signal of a channel received at present and provide an output of the result. Thus, a receiver 700 when receiving broadcast through a channel can receive the program arrangement information of all the channels. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  According to the present invention, when the terrestrial digital broadcast is modulated and retransmitted to the CATV, the receiver can acquire the program arrangement information of all the transmitted services by the same means as the CATV retransmission of the BS digital broadcast. The present invention relates to a CATV retransmission system.

  At present, the CATV companies are digitizing broadcasts, and so far, satellite digital broadcast BS digital broadcasts and east longitude 110 degree CS digital broadcasts (hereinafter 110CS broadcasts) have been retransmitted. Several schemes have been proposed for CATV retransmission of these digital broadcasts. Among them, a scheme called modulation conversion or transmodulation (hereinafter referred to as TM) transmits all services of digital broadcasts. In addition, since the CATV company once demodulates the program from the satellite broadcasting for each service, reconfigures the program structure again, and retransmits, there is a possibility that all the services provided by the CATV company can be received by one receiver. Several CATV retransmission schemes have also been proposed for terrestrial digital broadcasting, but retransmission by modulation conversion is considered to be one of the leading schemes from the above viewpoint.

  In terrestrial digital broadcasting, an MPEG (Moving Pictures Experts Group) system is used as in BS digital broadcasting and 110CS broadcasting. The MPEG system compresses, encodes, and multiplexes digital broadcast signals, and further includes a program flowing in the transport stream and table information indicating the program configuration. The program arrangement information (PSI :) is associated with each other. Program Specific Information / SI (Service Information) is configured.

  In this program arrangement information, information necessary for the digital receiver to select a service and information necessary for a function for facilitating program selection such as EPG (Electronic Program Guide) are described. . BS digital broadcasting and 110CS broadcasting configure a network for each platform, and the program arrangement information in the network is operated in a so-called all-station SI system that transmits all transport streams in the network all at once. . As a result, the receiver can obtain all program arrangement information in the network in real time regardless of which channel is selected.

  However, terrestrial digital broadcasting, unlike BS digital broadcasting and 110CS broadcasting, is operated on an independent network for each broadcasting station. That is, since the program arrangement information in which only its own information is described is transmitted in the transport stream, the receiver uses the channel in which the transport stream flows for the program arrangement information of other transport streams. There was a problem that it could not be obtained unless it was selected. For this reason, the receiver must have a function to collect program arrangement information such as obtaining all program arrangement information by selecting all channels in order during periods of non-viewing. When a program of another channel is changed suddenly, it cannot follow in real time. Further, in a system that performs modulation conversion and retransmits to the CATV network, the frequency range that must be searched for collection is wide. For this reason, for example, when the frequency information is changed, it is necessary to search the entire frequency range, and the receiver cannot be viewed for a long time. Furthermore, since these operations are different from BS digital broadcasting and 110CS broadcasting, a receiver dedicated to terrestrial digital broadcasting is required, or only terrestrial digital needs to be operated with completely different software inside the receiver. . For this reason, the device configuration is complicated as a whole, the convenience is low, and the cost is increased.

  As a conventional CATV retransmission system that solves these problems, the program arrangement information of channels received by the CATV transmission apparatus for each channel of digital terrestrial broadcasting is extracted and collected by the program arrangement information control apparatus, There has been a method of generating program arrangement information for all channels and sending it to a CATV transmission apparatus for each channel (for example, see Japanese Patent Application No. 2002-297041). FIG. 2 shows a conventional CATV retransmission apparatus described in Japanese Patent Application No. 2002-297041.

  In FIG. 2, 100 is a CATV retransmission apparatus that receives and retransmits a signal from a terrestrial digital broadcast antenna (not shown), 101 is a tuner that receives a terrestrial digital broadcast signal and outputs a transport stream, and 102 A program arrangement information conversion unit that selects and changes desired program arrangement information on the transport stream output from the tuner unit 101, and 103 extracts desired program arrangement information from the transport stream output from the tuner unit 101. A program arrangement information extraction unit 104, a multiplexing unit 104 that multiplexes the input transport stream, 105 a modulation unit that modulates the transport stream from the multiplexing unit 104, and outputs it to a CATV transmission path (not shown), and 106 an external device A communication unit 200 that communicates with the CATV retransmission apparatus 100 A program arrangement information control apparatus that collects group arrangement information and generates second program arrangement information, 600 is a CATV transmission line, 700 is a receiver that can receive a signal from the CATV retransmission system, and 800 is a service received by the receiver Is a television that displays

  In the CATV retransmitting apparatus 100, the program arrangement information extracting unit 103 extracts program arrangement information from the transport stream output from the tuner unit 101, and transmits the program arrangement information to the program arrangement information control apparatus 200 via the communication unit 106. The program arrangement information control apparatus 200 sends it back to the CATV transmission apparatus for each channel. The CATV retransmission apparatus 100 collects program arrangement information and generates program arrangement information for all channels, and the CATV retransmission apparatus 100 multiplexes the received program arrangement information with a normal program signal by the multiplexing section 104, and a modulation section. At 105, QAM modulation is performed and distributed to each home.

  Broadcasting stations often have a standby system to improve reliability. The standby device is in a standby state in order to operate in place of the failed device when an abnormality occurs in the working device.

As an effective utilization method of the spare device, there is a method of performing an operation simulation of the current device using the performance of the spare device (see, for example, Patent Document 1).
JP 2002-132593 A

  However, in the conventional configuration, since a program arrangement information control device, which is a new device, is required to generate program arrangement information for all channels, there is a problem that causes an increase in system cost.

  In addition, the standby system has not been fully utilized effectively, such as just waiting until an abnormality does not occur, or being used for purposes other than the original processing such as simulation.

  The present invention solves the above-described conventional problems, and uses a spare device that has been in a standby state during normal operation, effectively using the spare device without using a new device, and programs for all channels. An object of the present invention is to provide an inexpensive modulation conversion type CATV retransmission system capable of collecting array information.

  In order to solve the above-described conventional problems, the CATV retransmission system according to the present invention includes a switching unit that receives a switching signal to the active system, in addition to a function in a case where a spare device operates as an active system, and the tuner Channel selection switching means for switching the channel selection means, program arrangement information processing means for processing the program arrangement information extracted by the program arrangement information extraction means, and program arrangement information communication means for transmitting the program arrangement information In the standby state as a standby system, program arrangement information is collected.

  With this configuration, it is possible to collect program arrangement information for all channels using a spare CATV transmitter.

  The present invention provides a spare CATV transmission apparatus in a CATV retransmission system that modulates and converts digital terrestrial broadcast waves and retransmits them to the CATV network, where the spare CATV transmission apparatus receives the terrestrial digital broadcast waves. Tuner means for outputting a transport stream, program arrangement information extracting means for extracting and outputting desired program arrangement information from the output transport stream, switching means for receiving a switching signal to the active system, and the tuner Channel selection switching means for switching the channel selection means, program arrangement information processing means for processing the program arrangement information extracted by the program arrangement information extraction means, and program arrangement information communication means for transmitting the processed program arrangement information And is arranged to collect program sequence information in a standby state as a standby system.

  In one embodiment of the present invention, the channel selection switching means of the spare CATV transmission device receives a channel designated by the user and collects program arrangement information of the designated channel.

  In one embodiment of the present invention, when a plurality of channels are designated by the user, the channel selection switching unit of the spare CATV transmission apparatus periodically receives the designated channels and receives the designated channels. Collect program arrangement information for all channels.

  In an embodiment of the present invention, the channel selection switching means of the spare CATV transmission device receives all channels that can be received automatically and periodically, and receives the program arrangement information of all the designated channels. To collect.

  In one embodiment of the present invention, the spare CATV transmission device includes program sequence information integration means for generating the second program sequence information including the contents of all the collected program sequence information.

  In one embodiment of the present invention, the program sequence information integration means receives the second program sequence information including contents obtained by deleting information for one different channel from all the collected program sequence information. Generate as many as the number of channels.

  In one embodiment of the present invention, the program arrangement information communication means transmits the collected program arrangement information as a transport stream to another CATV transmission apparatus.

  In one embodiment of the present invention, the program arrangement information communication means transmits the collected program arrangement information to another CATV transmission apparatus or system management apparatus via a network.

  The present invention is also a CATV retransmission system that modulates and converts a terrestrial digital broadcast wave and retransmits it to the CATV network. The CATV retransmission system includes one or more active CATV transmission apparatuses and the above-described backup CATV transmission apparatus. An active CATV transmission apparatus that extracts desired program arrangement information from an output transport stream and outputs the program arrangement information; a communication means that can receive the program arrangement information; and Program arrangement information converting means for converting the desired program arrangement information to generate a second transport stream, and multiplexing means for multiplexing the second transport stream and the program arrangement information input from the communication means; Modulation means for modulating the output of the multiplexing means and outputting it to a CATV transmission line, and the communication means Providing CATV retransmission system, characterized by receiving from the CATV transmission apparatus 備系.

  The present invention is also a CATV retransmission system that modulates and converts a terrestrial digital broadcast wave and retransmits the terrestrial digital broadcast wave to the CATV network, the CATV one or more active CATV transmission devices, and any one of the above-described CATV transmission devices. A standby CATV transmission apparatus and a system management apparatus, wherein the active CATV transmission apparatus extracts desired program arrangement information from the output transport stream and outputs the program arrangement information, and the program Communication means capable of receiving sequence information; program sequence information converting means for converting desired program sequence information in the transport stream to generate a second transport stream; the second transport stream and the communication means Multiplexing means for multiplexing the program arrangement information input from the receiver, and modulating the output of the multiplexing means and outputting to the CATV transmission line Modulation means, and the system management apparatus includes second communication means for transmitting and receiving program arrangement information, and program arrangement information processing means for processing program arrangement information, and the second communication means The program arrangement information is received from the standby CATV transmission apparatus, and the program arrangement information processing means performs processing as necessary and transmits it to the one or more active CATV transmission apparatuses. A CATV retransmission system is provided.

  The present invention also provides a method for collecting program arrangement information in a state in which a spare CATV transmission apparatus in a CATV retransmission system that modulates and converts a terrestrial digital broadcast wave and retransmits the digital terrestrial broadcast wave to the CATV network as a standby system. The method includes a tuner step for receiving a terrestrial digital broadcast wave and outputting a transport stream, and a program sequence information extraction for extracting and outputting desired program sequence information from the output transport stream. A program sequence information processing for processing the program sequence information extracted in the step, a switching step for receiving a switching signal to the active system, a channel selection switching step for switching the tuning of the tuner step, and the program sequence information extracting step And a program arrangement information communication step capable of transmitting the processed program arrangement information , Characterized by having a.

  The present invention also includes a program for executing the above-described backup CATV transmission apparatus, a program for executing the above-described CATV retransmission system, and a recording medium on which these are recorded.

  According to the CATV re-transmission system of the present invention, all program arrangement information can be collected and transmitted without any additional equipment and without complicated processing. Therefore, the program of the own station is included in each transport stream transmitted to the CATV network. Since not only the sequence information but also the program sequence information of other stations is transmitted, the receiver can obtain the program sequence information of other channels in real time even while watching the program. It is possible to omit complicated functions such as tuning and collecting program arrangement information.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is an example of a configuration diagram of a CATV retransmission system according to Embodiment 1 of the present invention. FIG. 1 shows a CATV re-transmission system of the active system 4 system standby system 1 system. In FIG. 1, the same components as those in FIG. In FIG. 1, reference numerals 110, 120, and 130 denote the same CATV retransmission apparatuses that receive a signal from a digital terrestrial broadcasting antenna (not shown) and perform retransmission, the same as 100, and 150 is a spare CATV retransmission apparatus. And 300 is a system management apparatus for managing the CATV retransmission system, and 900 is a multiplexer that mixes the outputs of the CATV transmission apparatus for output to the CATV transmission path.

  The spare CATV retransmission apparatus 150 automatically collects program arrangement information of all receivable terrestrial digital broadcast channels and sends it to the system management apparatus 300. The system management apparatus 300 sends the collected program arrangement information to the active devices 100, 110, 120 and 130. The current device multiplexes and outputs the program arrangement information for all the channels sent to the currently received channel signal, so that if the receiver 700 receives a certain channel, the program for all channels is received. It becomes possible to receive sequence information.

  The operation of the spare CATV retransmission apparatus 150 will be described with reference to FIG. FIG. 3 is an example of a configuration diagram of a spare device of the CATV retransmission system according to Embodiment 1 of the present invention. In FIG. 3, the same components as those in FIG.

  In FIG. 3, reference numeral 210 denotes an active processing unit for performing an active operation, 220 is a program arrangement information collecting unit that collects program arrangement information during standby, and 221 is the ground for receiving program arrangement information. A channel selection switching unit that switches channels of digital broadcasting, 222 is a program sequence information processing unit that processes the program sequence information of each channel extracted by the program sequence information extraction unit, and 223 is the collected program sequence information. A program arrangement information communication unit to be output to the outside, and 230 is a switching unit for switching whether the CATV retransmission apparatus operates in the active system or the standby system.

  When there is an instruction to operate in the active system by the system management device 300 or user settings, the active system processing unit 210 collects program arrangement information in response to an instruction from the switching unit 230 to operate as a standby system. The unit 220 operates.

  First, the operation of the active processing unit 210 will be described. The active processing unit 210 performs the same operation as that of the active CATV retransmission apparatus 100.

  The transport stream output from the tuner unit 101 is converted only in the program sequence information conversion unit 102 by the program sequence information conversion unit 102, and the second transport stream is generated. For example, in the frequency information in NIT (Network Information Table) information, the frequency used in the terrestrial digital and the frequency used in the CATV transmission line 600 may be different. is there. The generated second transport stream is input to the multiplexing unit 104. On the other hand, the transport stream output from the tuner unit 101 is also input to the program sequence information extraction unit 103. The program sequence information extraction unit 103 extracts only program sequence information (for example, NIT, BIT, SDT, EIT) required by other stations and sends it to the system management apparatus 300 through the communication unit 106. The system management apparatus 300 collects the program arrangement information extracted by the CATV retransmission apparatus 100 and generates second program arrangement information. The second program sequence information is received by the communication unit 106 of the CATV retransmission apparatus 100 from the program sequence information control apparatus 200 and sent to the multiplexing unit 104. The second transport stream and the second program arrangement information are multiplexed by the multiplexing unit 104, modulated by the modulation unit 105, and output to the CATV transmission path. The modulated signal is input to all receivers connected to the CATV transmission path, and the receiver performs a channel selection operation based on the program arrangement information, and can perform video display, EPG display, and the like on the television.

  Next, the operation of the program arrangement information collection unit 220 that operates when waiting as a standby system will be described.

  The channel selection switching unit 221 controls the tuner unit 101 to automatically frequency scan the terrestrial digital broadcast band, sequentially selects all receivable channels, and the program sequence information extraction unit 103 selects the program sequence information of the corresponding channel. Is extracted and sent to the program sequence information processing unit 222. Since the program arrangement information is transmitted in units of several seconds to several minutes, as soon as the program arrangement information of the reception channel is received, the channel selection of the next channel is started. This process is repeated. Next, the program arrangement information processing unit 222 that processes the program arrangement information of each channel extracted by the program arrangement information extraction unit stores the program arrangement information received by each channel. When program arrangement information for all channels is collected, it is integrated as a single piece of data. Data for all the integrated channels is transmitted from the program arrangement information communication unit 223 to the system management apparatus 300. These processes are repeated each time program arrangement information for all channels is extracted. Note that the program sequence information processing unit 222 stores information for each channel and compares it with the program sequence information extracted periodically, and transmits it to the system management apparatus 300 only when it is updated. An effect is obtained.

  Next, the operation of the system management apparatus 300 will be described with reference to the drawings.

  FIG. 4 shows an example of the connection between the CATV retransmission apparatus and the system management apparatus 300 and the communication content between them. Reference numeral 2000 denotes all program arrangement information from the spare CATV transmission apparatus, and 1000, 1001, and 1002 denote second program arrangement information output from the system management apparatus 300. The CATV retransmission apparatus 100 and the CATV retransmission apparatus 110 The second program arrangement information 1000 to the second program arrangement information 1002 and numbers are assigned in association with the CATV retransmission apparatus 120.

  The system management apparatus 300 receives the program arrangement information 2000 collected by the spare CATV retransmission apparatus 150, and each of the CATV retransmission apparatus 100, the CATV retransmission apparatus 110, and the CATV retransmission apparatus 120 individually receives the second program arrangement information 2000. Program sequence information 1000, second program sequence information 1001, and second program sequence information 1002 are generated. The difference is that program arrangement information other than the target device is generated.

  FIG. 5 shows an example in which the second program arrangement information 1000 for the CATV retransmission apparatus 100 is generated. The second program arrangement information generated for the CATV retransmission apparatus 100 includes a CATV retransmission apparatus receiving a channel other than the one received by the CATV retransmission apparatus 100, in this example, the CATV retransmission apparatus 101. And the program arrangement information 3001 and the program arrangement information 3002 of the channel received by the CATV retransmission apparatus 101 are generated. Since the program arrangement information received by the CATV retransmitting apparatus 100 is given a PID (Packet Identifier: hereinafter abbreviated as PID) indicating that it is the program arrangement information of the own station, only this PID is given in the system management apparatus 300. Needs to be changed to indicate the PID of the other station. The changed program arrangement information is given numbers 30011 and 30012, respectively. Second program arrangement information 1000 for CATV retransmitting apparatus 100 is configured by simply connecting program arrangement information 30011 and program arrangement information 30012.

  The second program arrangement information 1000 generated in this way is input to the CATV retransmission apparatus 100 as the program arrangement information of the other station from the system management apparatus 300 as shown in FIG. The multiplexing unit 104 multiplexes the program arrangement information 1000 of the other station with the transport stream including the program arrangement information of the station, and outputs it to the CATV transmission line.

  With the above operation, the receiver can acquire the program arrangement information of other stations in real time while receiving any transport stream.

  In this example, only the operation of the CATV retransmission apparatus 100 is shown, but it goes without saying that the CATV retransmission apparatus 101 and the CATV retransmission apparatus 102 perform the same operation.

  In addition, the switching by the channel selection switching unit 221 may be instructed by the system management apparatus 300 or the user and select only a specific timing or a specific channel.

  In the present embodiment, the active CATV retransmission apparatus 100 and the spare CATV retransmission apparatus 150 have been described as separate configurations, but the same effect can be obtained by adopting the backup CATV retransmission apparatus 150 as a configuration. .

  Further, the program arrangement information processing performed by the system management apparatus 300 may be performed by the program arrangement information processing unit 222 of the spare CATV retransmission apparatus 120. As a result, the same effect can be obtained without the system management apparatus 300. In this case, the program arrangement information for the active system may be delivered as an externally input transport stream.

  In this example, the second program sequence information generated by the system management device is generated as program sequence information other than the target device. However, the target device is included as shown in FIG. Second program arrangement information may be generated. In this case, in the CATV retransmission apparatus 100, the program arrangement information of the received channel is deleted from the transport stream by the program arrangement information conversion unit 102.

  In this example, the program arrangement information is changed only in the PID portion indicating that it is the own station. However, as long as the program configuration on the transport stream flowing through each CATV retransmission apparatus 100 is consistent. The other part of the program arrangement information may be changed.

  In addition, according to this configuration, not only program arrangement information but also program related information such as NIT can be collected from all channels by the standby CATV transmission apparatus and transmitted from each active system.

  The CATV retransmission system according to the present invention is useful as an inexpensive retransmission system for digital terrestrial broadcasting to CATV. In addition, as an application of the standby system, application to various broadcasting systems is also useful.

The block block diagram of the CATV re-transmission apparatus based on Embodiment 1 of this invention. Conventional CATV retransmission system configuration diagram Configuration diagram of spare CATV retransmission apparatus according to Embodiment 1 of the present invention Diagram of connection between CATV retransmission apparatus and system management apparatus 300 and communication contents between them The figure which produced | generated the 2nd program arrangement | sequence information 1000 for the CATV re-transmission apparatus 100 Multiple image diagram of other station program arrangement information Generation diagram of second program arrangement information

Explanation of symbols

100 to 130 Active CATV Retransmission Device 101 Tuner Unit 102 Program Sequence Information Conversion Unit 103 Program Sequence Information Extraction Unit 104 Multiplexing Unit 105 Modulation Unit 106 Communication Unit 150 Standby CATV Retransmission Device 200 Program Sequence Information Control Device 210 Reserve Active processing unit 220 in the system CATV retransmitting apparatus 220 Program sequence information collecting unit 221 in the standby CATV retransmission apparatus 221 Channel selection switching unit for switching channels of digital terrestrial broadcasting in order to receive program sequence information 222 Program sequence information extraction Program sequence information processing unit 223 for processing the program sequence information of each channel extracted by the unit 223 Program sequence information communication unit for outputting the collected program sequence information to the outside 230 The CATV retransmission apparatus can be used in either the active system or the standby system Switching unit for switching between operation 300 System tube Physical apparatus 600 CATV transmission line 700 Receiver 800 Television 900 Multiplexer 1000-1002 Number for identifying second program arrangement information to each CATV retransmission apparatus 2000 All program arrangement information from spare CATV transmission apparatus 3001 Channel arrangement information of channel received by CATV retransmission apparatus 101 3002 Channel arrangement information of channel received by CATV retransmission apparatus 102 30011-30012 Changed program arrangement information

Claims (10)

A spare CATV transmission apparatus in a CATV retransmission system that modulates and converts terrestrial digital broadcast waves and retransmits them to the CATV network,
Tuner means for receiving a terrestrial digital broadcast wave and outputting a transport stream;
Program sequence information extraction means for extracting and outputting desired program sequence information from the output transport stream;
Switching means for receiving a switching signal to the active system;
Channel selection switching means for switching channel selection of the tuner means;
Program arrangement information processing means for processing the program arrangement information extracted by the program arrangement information extraction means;
Program sequence information communication means capable of transmitting the processed program sequence information,
A standby CATV transmission apparatus in a CATV retransmission system, wherein program arrangement information is collected in a standby state as a standby system. 2. The spare CATV transmission according to claim 1, wherein the channel selection switching means of the spare CATV transmission device receives a channel designated by a user and collects program arrangement information of the designated channel. apparatus. When a plurality of channels are designated by the user, the channel selection switching means of the spare CATV transmission device receives the signals by periodically switching the designated channels and collecting the program arrangement information of all the designated channels. The spare CATV transmission apparatus according to claim 2, wherein: The channel selection switching means of the spare CATV transmission device receives all the channels that can be received automatically and periodically, and collects the program arrangement information of all the designated channels. The spare CATV transmission apparatus according to claim 1. 5. The spare CATV transmission device comprises program sequence information integration means for generating second program sequence information including the contents of all the collected program sequence information. The spare CATV transmission apparatus as described in any one of Claims. The program sequence information integration means generates the second program sequence information corresponding to the number of received channels, which includes contents obtained by deleting information for one different channel from all the collected program sequence information. The spare CATV transmitter according to claim 5. 7. The spare CATV transmission apparatus according to claim 1, wherein the program arrangement information communication means transmits the collected program arrangement information as a transport stream to another CATV transmission apparatus. 7. The reserve according to claim 1, wherein the program arrangement information communication unit transmits the collected program arrangement information to another CATV transmission apparatus or system management apparatus via a network. CATV transmitter. A CATV retransmission system that modulates and converts digital terrestrial broadcast waves and retransmits them to a CATV network,
One or more active CATV transmission devices and the backup CATV transmission device according to any one of claims 1 to 8,
The active CATV transmitter is
Program sequence information extraction means for extracting and outputting desired program sequence information from the output transport stream;
A communication means capable of receiving the program arrangement information;
Program sequence information converting means for converting desired program sequence information in the transport stream to generate a second transport stream;
Multiplexing means for multiplexing the second transport stream and the program arrangement information input from the communication means;
Modulation means for modulating the output of the multiplexing means and outputting it to the CATV transmission line,
The CATV retransmission system characterized in that the communication means receives program arrangement information from a standby CATV transmission apparatus. A CATV retransmission system that modulates and converts digital terrestrial broadcast waves and retransmits them to a CATV network,
One or more active CATV transmission devices, the backup CATV transmission device according to any one of claims 1 to 8, and a system management device,
The active CATV transmitter is
Program sequence information extraction means for extracting and outputting desired program sequence information from the output transport stream;
Communication means capable of receiving the program arrangement information;
Program sequence information converting means for converting desired program sequence information in the transport stream to generate a second transport stream;
Multiplexing means for multiplexing the second transport stream and the program arrangement information input from the communication means;
Modulation means for modulating the output of the multiplexing means and outputting it to the CATV transmission line,
The system management device includes:
Second communication means for transmitting and receiving program sequence information;
Program sequence information processing means for processing program sequence information,
The second communication means receives the program arrangement information from the standby CATV transmission apparatus, the program arrangement information processing means performs processing as necessary, and the one or more active CATV transmission apparatuses. A CATV re-transmission system, characterized by:

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