JP4539248B2 - Digital CATV transmitter - Google Patents

Description

  The present invention relates to processing at the time of rewriting an internal processing program and stopping an internal partial processing function in an apparatus for modulating and converting a digital broadcast and retransmitting it to CATV.

  Currently, CATV operators are proceeding with the digitization of facilities along with the digitization of broadcasting services. To date, BS digital broadcasting that is satellite broadcasting, 110-degree CS digital broadcasting (110CS broadcasting), and digital terrestrial broadcasting Digital retransmission has started. Several methods have been proposed for retransmitting these digital broadcasts to CATV. Among them, a method called modulation conversion or transmodulation transmits all services of digital broadcasts relatively efficiently and efficiently. Because of this, digital broadcast retransmission has become the mainstream. Hereinafter, a conventional transmission apparatus used in a digital CATV system for modulating and retransmitting such digital broadcast will be briefly described with reference to FIG.

In FIG. 8, a broadcast signal is transmitted through an antenna 101 and a transmission path 102, and functional blocks of a broadcast receiving unit 103, an input data processing unit 104, a program information processing unit 105, and an output data processing unit 106 are controlled by a control unit 107. Is input to the transmission device 10 controlled by the above. The input broadcast signal is demodulated by the broadcast receiving unit 103 and output as transport stream (hereinafter referred to as TS) data. The TS data is subjected to synchronization processing in the input data processing unit 104, and is recognized and separated in units of TS packets. Next, broadcast data in units of TS packets is selected by the program information processing unit 105 to select data to be retransmitted to the CATV, change processing of physical frequency information and time information, conversion processing to a speed in accordance with the transmission band of the CATV, etc. Is done. Then, the output data processing unit 106 performs synchronization processing as a data stream for transmission to the CATV network and outputs the data stream from the transmission device 10. The TS data output from the transmitter 10 is subjected to a prescribed modulation process by the modulator 108 and output to the CATV transmission line network.
Japanese Patent Laid-Open No. 2000-174813

  Here, the control unit 107 is generally operated by a program describing a control procedure. However, in order to change the control procedure by correcting a problem or adding a function, the program is changed to another program. Need to change.

  However, in the conventional configuration, when the program is changed, the control of the broadcast receiving unit 103, the input data processing unit 104, the program information processing unit 105, and the output data processing unit 106 must be stopped. 10 has a problem that the broadcast data output from 10 stops. This will stop the service for CATV operators and should be avoided as much as possible.

  Further, when the operation of the control unit 107 is stopped due to an unexpected situation, the broadcast data output from the transmission device 10 is similarly stopped, and there is a problem that the service is stopped.

  In order to solve the above-described conventional problems, a transmission apparatus according to the present invention includes a receiving unit that receives a digital broadcast wave, an input data processing unit that processes a signal received by the receiving unit, and a process performed by the input data processing unit. Program information processing means for rewriting program information and time information included in the recorded data for CATV, and output data processing for converting the data processed by the program information processing means into a speed suitable for the CATV network and outputting the data Means, a program change means for rewriting a processing program of a part or all of the internal processing means, a program change process detection means for detecting that the program change process is started, and a process that is not changed when the program change is started There is a processing content switching means for switching the processing content to the means, and when changing the program of some processing means, Characterized in that it continues the transmission process to the CATV switch to processing to means.

  Also, receiving means for receiving the digital broadcast wave, input data processing means for processing a signal received by the receiving means, and program information and time information included in the data processed by the input data processing means for CATV A program information processing means for rewriting the data, and a means for monitoring the operation of the output data processing means for converting the data processed by the program information processing means to a speed suitable for the CATV network and outputting the data. When the operation of the processing means stops unexpectedly, the processing content can be switched to another operating processing means to continue the transmission processing to CATV.

  As the switching of the processing means, there is a method in which the input data processing means sends the processing data as it is to the output data processing means while the operation of the program information processing means is stopped, and the output data processing means performs speed conversion. .

  In addition, when the operation of the program information processing means is stopped by providing time information monitoring means for monitoring time information included in the signal data and time information generation means for generating time information, the output data processing means By detecting the time information from the signal sent from the input data processing means and re-adding the time information based on the time generated by the time information generating means, the reproduction at the receiver can be continued. It becomes.

  In addition, when the operation of the program information processing means is stopped by providing the output data processing means with a function of holding program information output from the program information processing means, the output data processing means The operation can be continued by replacing the program information of the processing data sent from the input data processing means with the program information.

  Further, the output data processing means is provided with data holding means, and when other processing means stops normal processing operation, it continues to output specific data so that it is connected to the subsequent stage including the receiver. It is possible to guarantee the operation of the system to a minimum.

  When this specific data is a NULL packet, it becomes possible to prevent abnormal operation of the modulator, and when the time information is added to the specific data, the reproduction at the receiver can be smoothly resumed when the broadcast data transmission is resumed. In addition, when program information is added to the specific data, it is possible to set the channel selection of the receiver.

  According to the transmission apparatus of the present invention, when the rewriting of the processing program of some internal processing means is detected, or the operation of the processing means is monitored and it is detected that some processing means has stopped, By reviewing the data processing to other data processing means in operation, it is possible to avoid interruption of operation due to the stop of the processing.

  In addition, by providing a means for monitoring time information in the input data processing means and the output data processing means, the time information is corrected by the output data processing means when the program information processing unit is stopped. Smooth playback can be continued.

  Also, by providing the output data processing means with a data retention function and outputting the data when the operation of the program information processing unit stops, the operation is continued or abnormal operation of the modulator or receiver connected to the subsequent stage Can be prevented.

  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 transmission apparatus according to Embodiment 1 of the present invention. In FIG. 1, the transmission apparatus 1 according to the first embodiment includes a broadcast receiving unit 13, an input data processing unit 14, a program information processing unit 15, an output data processing unit 16, an operation mode switching unit 17, and an operation. A mode detection unit 18 and a program data input unit 19 are provided. The program information processing unit 15 includes a CPU (Central Processing Unit) 151, a DPRAM (Dual Port Random Access Memory) 152, and a memory 153 for storing a control program. In this example, the CPU 151 of the program information processing unit also controls the broadcast receiving unit 13, the input data processing unit 14, and the output data processing unit 16, but another control device may be used. . Hereinafter, the operation of the transmission apparatus 1 will be described with reference to FIG.

  In a normal operation state, a broadcast signal input to the transmission device 1 via the antenna 11 and the transmission path 12 is demodulated by the broadcast receiving unit 13 and output as TS data. The TS data is subjected to synchronization processing by the input data processing unit 14, recognized and separated in units of TS packets, and read out to the CPU 151 via the DPRAM 152 of the program information processing unit 15. The CPU 151 filters the read TS packet by PID (Packet Identification: packet identifier) to select data, replace program information data such as NIT (Network Information Table), rewrite time information, and further transfer the CATV transmission band. Data is written into the DPRAM 152 while performing timing control to match the above. The output data processing unit 16 reads the TS packet designated by the CPU 151 from the DPRAM 152 at a speed matching the transmission band of CATV, and outputs it as stream data. The TS data output from the transmitter 1 is subjected to a prescribed modulation process by the modulator 4 and output to the CATV transmission line network.

  Here, a data writing / reading process among the input data processing unit 14, the CPU 151 and DPRAM 152 of the program information processing unit 15, and the output data processing unit 16 will be described with reference to FIG. In FIG. 2, if the flag of the flag area 152b of the input queue 152a in the DPRAM 152 of the program information processing unit 15 is “0” at the write timing, the input data processing unit 14 displays address information for storing data. Write to the address area 152c of the input queue 152a and set the flag "1" in the flag area 152b. On the other hand, if the flag of the flag area 152b of the input queue 152a in the DPRAM 152 is “1” at the read timing, the CPU 151 reads the data from the corresponding address in the TS packet storage area 152d with reference to the address area 152c, The flag in the area 152b is returned to “0”. By repeating the above operation, the program information processing unit 15 reads data from the input data processing unit 14. Next, if the flag of the flag area 152f of the output queue 152e in the DPRAM 152 is “0” at the timing of writing the processed data, the CPU 151 stores the address information for storing the data in the address area 152g of the output queue 152e. Write, flag "1" is set in flag area 152f. On the other hand, if the flag of the flag area 152f of the output queue 152e in the DPRAM 152 is “1” at the read timing, the output data processing unit 16 refers to the address area 152g and receives data from the corresponding address in the TS packet storage area 152d. Reading is performed and the flag in the flag area 152f is returned to "0". By repeating the above operation, the output data processing unit 16 reads data from the program information processing unit 15.

  Next, the CPU 151 of the program information processing unit operates in accordance with a control program stored in the memory 153. The operation when this control program is changed will be described with reference to FIG. In FIG. 1, when the setting of the operation mode switching unit 17 is switched to the program change mode, the operation mode detection unit 18 that detects the setting notifies the CPU 151, whereby the CPU 151 switches to the program change mode and clears the memory 153. Thereafter, the data from the program input unit 19 is written into the memory 153.

  Here, when the operation mode detection unit 18 notifies the CPU 151 of the switching to the program change mode, the output data processing unit 16 notifies the output data processing unit 16 of the program information processing unit 15. By reading the TS data written by the input data processing unit 14 into the DPRAM 152 without reading out the TS data written by the CPU 151 into the DPRAM 152, the data on the input side can be passed through to the output side without performing program information processing. The operation at this time will be described with reference to FIG. 2. When the output data processing unit 16 is notified of the switching from the operation mode detection unit 18 of FIG. 1 to the program change mode, the CPU 151 of the program information processing unit 15 The data is switched so that the input data processing unit 14 refers to the input queue 152a in which the address information of the TS packet written in the DPRAM 152 is referred to without referring to the output queue 152e in the DPRAM 152 in which the information of the address to which the TS data is written exists. Is read out. As described above, the output data processing unit 16 can read the TS data written in the DPRAM 152 by the input data processing unit 14 as it is.

  As another method, the output of the input data processing unit 14 and the input data line of the output data processing unit 16 are connected in advance, and the output of the input data processing unit 14 when the CPU 151 switches to the program change mode. It is also possible to send TS data directly from the input to the input of the output data processing unit 16.

  However, since the broadcast data on the input side is different from the transmission band capacity on the CATV side, it is necessary to convert the transmission rate. This is because the setting of the CPU 151 in the operation mode is held in the output data processing unit 16, and when the CPU 151 is switched to the program change mode, from the input side according to the setting held in the output data processing unit 16. This is realized by performing packet filtering of the TS data, selecting packets to be sent to the CATV side, and inserting a NULL packet as necessary to match the transmission band of the CATV. However, when the speed conversion is performed, the position (b) of the TS packet after the speed conversion changes from the time of the original broadcast data (a) as shown in FIG. Therefore, an example of a time information correction method will be described with reference to FIGS. 4 and 5 in which a part of the transmission device 1 according to the first embodiment of FIG. 1 is extracted. 4 shows the operation during normal operation, and FIG. 5 shows the operation when the CPU 151 in FIG. 1 is switched to the program change mode.

  In FIG. 4, during normal operation, a TS packet having time information Tin input to the input data processing unit 14 is sent to the CPU 151 via the DPRAM 152 of the program information processing unit 15 to perform speed conversion processing. The time information is replaced with time information Tout and output to the output data processing unit 16. At this time, the time information detection unit 141 in the input data processing unit 14 extracts the time information Tin from the TS packet having the time information, and notifies the output data processing unit 16 of it. In the output data processing unit 16, the time information detection unit 161 extracts the time information Tout from the TS packet having the time information read from the CPU 151 via the DPRAM 152, and detects the time information in the input data processing unit 14. The time correction amount ΔT (= Tout−Tin) in the CPU 151 is calculated and stored in the memory 162 by inputting the time information Tin notified from the unit 141 to the subtraction circuit 161.

  Next, when the CPU 151 switches to the program change mode, in FIG. 5, the TS data written in the DPRAM 152 of the program information processing unit 15 by the input data processing unit 14 is used as it is by the output data processing unit 16 as the program information. Read from the DPRAM 152 of the processing unit 15, and the time information detection unit 161 extracts time information Tin. Then, by inputting the extracted time information Tin and the time correction amount ΔT in the CPU 151 of the program information processing unit 15 stored in the memory 162 at the time of operation to the adder circuit 164, the same corrected value as in the normal operation is obtained. The time information Tout (= Tin + ΔT) is calculated, and the time information rewriting unit 165 rewrites the original time information Tin of the TS packet read from the CPU 151 via the DPRAM 152 to the corrected time information Tout. In addition, the output data processing unit 16 controls the output timing of the data by inserting a NULL packet so as to match the value of the time information Tout corrected by the time correction amount ΔT.

  As described above, when the CPU 151 of the program information processing unit 15 switches from the normal operation mode to the program change mode, the TS packet written from the input data processing unit 14 to the DPRAM 152 of the program information processing unit 15 is output to the output data processing unit 16. Is read from the DPRAM 152 of the program information processing unit 15 as it is, and the output data processing unit 16 performs time information correction and speed conversion processing to output as stream data, so that the modulator 4 performs a prescribed modulation process. The retransmitted data is continuously output to the CATV transmission line network, and the operation can be continued.

  Next, the operation when the CPU 151 of the program information processing unit 15 returns to the original normal operation mode after completing the change of the control program stored in the memory 153 in the program change mode will be described with reference to FIG. To do. In FIG. 1, when the change of the control program is completed and the operation mode switching unit 17 is switched to the normal operation mode, the operation mode detection unit 18 that detects the change notifies the CPU 151, whereby the CPU 151 is in the normal operation mode. The TS packet reading is started with reference to the queue area for input data in the DPRAM 152. Subsequently, the CPU 151 performs TS packet filtering, speed conversion, and time information correction, writes the processed TS packet back into the DPRAM 152, and records the address information in the output data queue area of the DPRAM 152. At this time, the output data processing unit 16 continues the operation in the program change mode in parallel until the output data queue area is filled, and is notified from the CPU 151 that the output data queue area is filled. At this stage, the TS packet processed by the CPU 151 is read with reference to the output data queue area of the DPRAM 152.

  As described above, even when the CPU 151 of the program information processing unit 15 completes the change of the control program stored in the memory 153 in the program change mode and returns to the original normal operation mode, the program is sent to the CATV transmission line. Data can be recovered smoothly.

(Embodiment 2)
In the first embodiment, the case where the control program of the program information processing unit is changed has been described. Next, in Embodiment 2 of the present invention, when the CPU operation of the program information processing unit is stopped, transmission that continues retransmission to the CATV transmission network by bypassing the input broadcast data to the output side Providing equipment.

  FIG. 6 is an example of a configuration diagram of a transmission apparatus according to Embodiment 2 of the present invention. In FIG. 6, the transmission device 2 according to Embodiment 2 includes a broadcast receiving unit 13, an input data processing unit 14, a program information processing unit 15, an output data processing unit 16, and an operation monitoring unit 21. The program information processing unit 15 includes a CPU 151 and a DPRAM 152. In this example, the CPU 151 of the program information processing unit also controls the broadcast receiving unit 13, the input data processing unit 14, and the output data processing unit 16, but another control device may be used. . Moreover, in the transmission apparatus 2 of 2nd Embodiment, the same reference number is attached | subjected about the component same as the transmission apparatus 1 which concerns on the said Embodiment 1. FIG. Hereinafter, the operation of the transmission apparatus 2 will be described with reference to FIG.

  In a normal operation state, the broadcast signal input to the transmission device 2 via the antenna 11 and the transmission path 12 is demodulated by the broadcast receiving unit 13 and output as TS data. The TS data is subjected to synchronization processing by the input data processing unit 14, recognized and separated in units of TS packets, and written in the DPRAM 152 of the program information processing unit 15. At this time, the input data processing unit 14 records the address information in which the TS packet is written in the input data queue area provided in the DPRAM 152 of the program information processing unit 15. The CPU 151 reads the TS packet written from the input data processing unit 14 by referring to the queue area for input data, performs filtering by PID, selects data, replaces program information data such as NIT, and writes time information. In other words, the speed conversion for adjusting to the transmission band of CATV is performed, and the result is written back to the DPRAM 152 again. At this time, the CPU 151 records the address at which the TS packet is written in the output data queue area of the DPRAM 152, and the output data processing unit 16 refers to the output data queue area so that the TS packet designated by the CPU 151 is stored. The data is read from the DPRAM 152 at a speed matching the CATV transmission band and output as stream data. The TS data output from the transmitter 2 is subjected to a prescribed modulation process by the modulator 4 and output to the CATV transmission line network.

  Here, although the address of the TS packet is continuously written by the CPU 151 in the output data queue area of the DPRAM 152 as described above, the operation monitoring unit 21 monitors this operation. That is, when the operation of the CPU 151 is stopped and writing to the output data queue area of the DPRAM 152 is not performed, the operation monitoring unit 21 detects this and notifies the output data processing unit 16 of the fact. Then, the output data processing unit 16 reads the TS packet with reference to the input data queue area of the DPRAM 152, while reading the TS packet with reference to the output data queue area of the DPRAM 152 so far. Switching, further filtering of the read TS packet, correction of time information, and speed conversion are performed and output as stream data.

  With the above operation, even when the operation of the CPU 151 of the program information processing unit 15 is stopped, the operation monitoring unit 21 detects this and outputs TS packet filtering, time information correction, and speed conversion processing. By switching to the data processing unit 16, the receivers under the CATV transmission line network can continuously receive.

(Embodiment 3)
In Embodiment 3 of the present invention, specific data is stored in the output data processing unit, and when a control program of the program information processing unit is changed, or when an abnormality such as operation stop of the CPU or input side device of the program information processing unit occurs, Provided is a transmission device that enables tuning of a receiver to be set and avoids abnormal operation of a modulator by outputting specific data stored in an output data processing unit.

  FIG. 7 is an example of a configuration diagram of a transmission apparatus according to Embodiment 3 of the present invention. In FIG. 7, the transmission device 3 according to the third embodiment includes a broadcast receiving unit 13, an input data processing unit 14, a program information processing unit 15, an output data processing unit 16, an operation mode switching unit 17, and an operation. A mode detection unit 18, a program data input unit 19, and an operation monitoring unit 21 are provided. The program information processing unit 15 includes a CPU 151, a DPRAM 152, and a memory 153 for storing a control program, and the output data processing unit 15 performs filtering by the filtering unit 166 that filters TS packets and the filtering unit 166. And a memory 167 that holds the extracted TS packet data. In this example, the CPU 151 of the program information processing unit 15 also controls the broadcast receiving unit 13, the input data processing unit 14, and the output data processing unit 16. However, even if another control device is used. good. Further, in the transmission device 3 according to the third embodiment, the same reference numerals are assigned to the same components as those of the transmission device 1 according to the first embodiment and the transmission device 2 according to the second embodiment. Yes. Hereinafter, the operation of the transmission apparatus 3 will be described with reference to FIG.

  In a normal operation state, the broadcast signal input to the transmission device 2 via the antenna 11 and the transmission path 12 is demodulated by the broadcast receiving unit 13 and output as TS data. The TS data is subjected to synchronization processing by the input data processing unit 14, recognized and separated in units of TS packets, and written in the DPRAM 152 of the program information processing unit 15. At this time, the input data processing unit 14 records the address information in which the TS packet is written in the input data queue area provided in the DPRAM 152 of the program information processing unit 15. The CPU 151 reads the TS packet written from the input data processing unit 14 by referring to the queue area for input data, performs filtering by PID, selects data, replaces program information data such as NIT, and writes time information. In other words, the speed conversion for adjusting to the transmission band of CATV is performed, and the result is written back to the DPRAM 152 again. At this time, the CPU 151 records the address at which the TS packet is written in the output data queue area of the DPRAM 152, and the output data processing unit 16 refers to the output data queue area so that the TS packet designated by the CPU 151 is stored. The data is read from the DPRAM 152 at a speed matching the CATV transmission band and output as stream data. The TS data output from the transmitter 3 is subjected to a prescribed modulation process by the modulator 4 and output to the CATV transmission line network.

  Here, when the output data processing unit 16 reads the TS packet with reference to the address information of the output data queue area provided in the DPRAM 152 of the program information processing unit 15, the output data processing unit 16 outputs the TS packet to the filtering unit 166 of the output data processing unit 16. Specific data such as program information such as NULL, time information, and NIT is extracted with reference to the PID and stored in the memory 167 of the output data processing unit 16. At this time, the data update number is also referred to, and when the data is updated, it is stored again in the memory 167.

  Next, the operation when the CPU of the program information processing unit 15 is switched to the gram change mode or when the operation is stopped will be described. When the output data processing unit 16 receives the notification of the change of the operation mode from the operation mode detection unit 18 or the notification of the operation abnormality of the CPU 151 from the operation monitoring unit 21, the output data processing unit 16 sets the reference destination of the address information for reading the TS packet from the DPRAM 152. , Switching from the output data queue area to the input data queue area, filtering the read TS packet data and selecting packets to be sent to the CATV side, correcting the time information, and converting the speed, At this time, the program information stored in the memory 167 of the output data processing unit 16 is read out and replaced with program information such as NIT originally included in the broadcast data bypassed from the input side. As described above, since the broadcast data retransmitted to the CATV transmission line network includes the program information for CATV, the receiver can set the channel selection.

  In addition, when TS data is no longer output from the input data processing unit 14, address information cannot be read from either the output data queue area or the input data queue area of the DPRAM 152. The output data processing unit 16 outputs NULL data and program information such as NIT stored in the memory 167, time information, or all of them as TS data at a speed matching the transmission bandwidth capacity on the CATV side. As described above, it is expected that the modulator 4 can avoid an abnormal operation, and the receiver can acquire program information or reproduce the system clock, thereby enabling early data reproduction at the time of recovery. As for program information, PAT (Program Association Table) and PMT (Program Map Table) other than NIT have the same effect, and are not limited thereto.

  When the digital CATV transmission device of the present invention detects rewriting of the processing program of some internal processing means, or monitors the operation of the processing means and detects that some processing means has stopped, By switching the processing of broadcast data to another processing means that is operating, it is possible to avoid interruption of operation due to the suspension of processing, and the means for monitoring time information is provided in the input data processing means and the output data processing means As a result, when the program information processing unit stops, the output data processing means corrects the time information so that smooth playback can be continued in the receiver. Also, the output data processing means has a data holding function. If the operation of the program information processing unit stops, the data is output so that the operation continues or abnormal operation of the modulator or receiver connected in the subsequent stage This is useful as a process for rewriting internal processing programs and for stopping some internal processing functions in a device that modulates and converts digital broadcasts and retransmits them to CATV. It is.

1 is a block diagram showing a configuration of a digital CATV transmission apparatus according to Embodiment 1 of the present invention. The figure which shows the write-in / read-out process between the input data processing part 14, the program information processing part 15, and the output data processing part 16 of FIG. The figure which shows an example of the speed conversion process of TS data performed by the output data processing part 16 of FIG. The figure which shows the process which hold | maintains the correction value of time information in the output data processing part 16 performed between the input data processing part 14, the program information processing part 15, and the output data processing part 16 of FIG. The figure which shows the correction process of the time information which the output data process part 16 of FIG. 1 performs at the time of the program change of the program information processing part 15 The block diagram which shows the structure of the transmitter for digital CATV which concerns on Embodiment 2 of this invention. The block diagram which shows the structure of the transmitter for digital CATV which concerns on Embodiment 3 of this invention. Block diagram showing the configuration of a conventional digital CATV transmitter

Explanation of symbols

1, 2, 3, 10 Digital CATV transmitter 4,108 Modulator 11, 101 Antenna 12, 102 Transmission path 13, 103 Broadcast receiver 14, 104 Input data processor 15, 105 Program information processor 16, 106 Output Data processing unit 17 Operation mode switching unit 18 Operation mode detection unit 19 Program input unit 21 Operation monitoring unit 107 Control unit 141, 161 Time information detection unit 151 CPU
152 DPRAM
152a Input queue 152b, 152f Flag area 152c, 152g Address area 152d TS packet storage area 152e Output queue 153, 162, 167 Memory 163 Subtraction circuit 164 Addition circuit 166 Filtering unit

Claims (4)

In a CATV retransmission apparatus that modulates and converts a digital broadcast wave and retransmits it to a CATV network,
Receiving means for receiving digital broadcast waves and outputting them as TS data;
Input data processing means for synchronously processing TS data output from the receiving means;
Storage means for storing TS data that has been synchronously processed by the input data processing means, and for storing TS data in which time information has been rewritten by the control means,
A control unit comprising a control program, and rewriting time information included in the synchronized TS data stored in the recording unit according to the control program for the CATV network;
Output data processing means for converting the speed of the TS data whose time information has been rewritten by the control means and outputting it to the CATV network;
Control program rewriting means for rewriting the control program;
A control program rewriting process detecting means for detecting that the rewriting of the control program is started by the rewriting means of the control program,
The output data processing means includes
When receiving notification from the control program rewrite processing detecting means that rewriting of the control program is started , instead of the control means, the TS data synchronously processed by the input data processing means is directly read from the storage means. and output, and wherein the <br/> rewriting the time information included in the synchronization processed TS data stored in the recording means based on the time correction amount held before the notification to for the CATV network CATV retransmission device. In a CATV retransmission apparatus that modulates and converts a digital broadcast wave and retransmits it to a CATV network,
Receiving means for receiving digital broadcast waves and outputting them as TS data;
Input data processing means for synchronously processing TS data output from the receiving means;
Storage means for storing TS data that has been synchronously processed by the input data processing means, and for storing TS data in which time information has been rewritten by the control means,
A control means comprising a control program, and rewriting time information included in the synchronized TS data stored in the recording means according to the control program for the CATV network;
Output data processing means for speed-converting and outputting TS data whose time information has been rewritten by the control means to the CATV network;
Monitoring means for monitoring the operation of the control means,
The output data processing means includes
Wherein the operation of the controller from the monitoring unit receives a notification that is stopped, in place of the control means, to read out the TS data processed synchronized by the input data processing unit from the storage unit directly, The CATV retransmission , wherein the time information included in the synchronized TS data stored in the recording means is rewritten for the CATV network based on the time correction amount held before the notification. apparatus. In a CATV retransmission apparatus that modulates and converts a digital broadcast wave and retransmits it to a CATV network,
Receiving means for receiving digital broadcast waves and outputting them as TS data;
Input data processing means for synchronously processing TS data output from the receiving means;
Storage means for storing TS data that has been synchronously processed by the input data processing means, and for storing TS data in which time information has been rewritten by the control means,
A control unit comprising a control program, and rewriting time information included in the synchronized TS data stored in the recording unit according to the control program for the CATV network;
Output data processing means for converting the speed of the TS data whose time information has been rewritten by the control means and outputting it to the CATV network;
Control program rewriting means for rewriting the control program;
A control program rewriting process detecting means for detecting that the rewriting of the control program is started by the rewriting means of the control program,
The output data processing means includes
Upon receiving notification from the control program rewrite processing detecting means that rewriting of the control program is started, the TS data synchronously processed by the input data processing means is directly read from the storage means instead of the control means. CATV emanating and, wherein the notification <br/> that outputs the speed conversion in holding the synchronization process is TS data is stored in the recording means on the basis of the transmission rate was for the CATV network before Retransmission device. In a CATV retransmission apparatus that modulates and converts a digital broadcast wave and retransmits it to a CATV network,
Receiving means for receiving digital broadcast waves and outputting them as TS data;
Input data processing means for synchronously processing TS data output from the receiving means;
Storage means for storing TS data that has been synchronously processed by the input data processing means, and for storing TS data in which time information has been rewritten by the control means,
A control unit comprising a control program, and rewriting time information included in the synchronized TS data stored in the recording unit according to the control program for the CATV network;
Output data processing means for converting the speed of the TS data whose time information has been rewritten by the control means and outputting it to the CATV network;
Monitoring means for monitoring the operation of the control means,
The output data processing means includes
Wherein the operation of the controller from the monitoring unit receives a notification that is stopped, in place of the control means, to read out the TS data processed synchronized by the input data processing unit from the storage unit directly, A CATV retransmission apparatus characterized in that the synchronized TS data stored in the recording means is converted to a speed for the CATV network based on the transmission speed held before the notification. .

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