JP7069847B2 - Synchronization processing device, signal processing system, synchronization processing method, and synchronization processing program - Google Patents

Description

The present invention relates to a synchronization processing device for transmitting and receiving data, a signal processing system, a synchronization processing method, and a synchronization processing program.

In satellite broadcasting, signals based on broadcasting data transmitted from the signal processing equipment of each broadcasting company (also called consignment station) are processed by the signal processing equipment of the consignment station (also called uplink station). And sent to the broadcasting satellite. Each signal processing device of each consignment station and the device for signal processing of the consignment station operate at timings based on the clock signal.

Therefore, the signal processing device of the consignment station receives the data transmitted from the signal processing device of each consignment station via the communication line, and transmits the data to the data at the timing based on the clock signal used as the reference in the consignment station. To generate a signal to be transmitted to the broadcasting satellite.

Patent Document 1 describes a transmission system that generates and transmits a transmission main signal in which a TLV (Type Length Value) packet is stored in a predetermined slot. Further, Patent Document 1 describes that a transmission slot device in a transmission system performs processing based on a transmission clock.

Patent Document 2 describes a method in which a transmitting side synchronizes a clock with data transmitted by an NTP (Network Time Protocol) server and transmits information indicating the clock, and a receiving side generates a clock signal based on the information. There is.

Patent Document 3 describes a system in which a transmitting side and a receiving side reproduce a clock signal based on data received from a broadcasting satellite.

Japanese Unexamined Patent Publication No. 2016-174299 Japanese Unexamined Patent Publication No. 2016-195380 Japanese Patent No. 5988529

There may be a difference between the cycle of each clock signal used in the signal processing device of each consignment station and the cycle of the clock signal used in the signal processing device of the consignment station. Then, in the process performed by the consignment station, there may be a problem that the data to be stored is not stored in the predetermined slot.

Therefore, in the system described in Patent Document 1, there may be a problem that data to be stored is not stored in a predetermined slot. Further, the system described in Patent Document 2 has a problem that a communication line for transmitting and receiving clock information must be prepared between a transmitting side and a receiving side, which requires a large amount of cost. In the system described in Patent Document 3, the signal processing device of each broadcasting company must receive the data transmitted by the broadcasting satellite, which also has a problem that a large amount of cost is required.

Therefore, the present invention is a synchronous processing apparatus capable of preventing the occurrence of a problem even when the respective periods of the clock signal in the processing of the source and the clock signal of the receiving side generated separately are different from each other. , Signal processing system, synchronization processing method, and synchronization processing program.

The synchronization processing device according to the present invention includes a receiving means for receiving a transmitted frame, a storage means for storing a packet contained in the frame received by the receiving means, and a frame received by the receiving means. New time information indicating the time corresponding to the processing applied to the packet based on the time information extracting means for extracting the time information indicating the time and the time indicated by the time information extracted by the time information extracting means. The reception is provided with a time information generating means for generating the packet, and a packet processing means for generating predetermined slot data by subjecting the packet read from the storage means to a process of multiplexing a packet containing the new time information. The means, the time information extracting means, the time information generating means, and the packet processing means operate based on a clock signal that is not synchronized with the source of the frame.

The signal processing system according to the present invention is characterized by comprising a synchronization processing device of any aspect and a signal processing device including a modulation means for performing modulation processing on the predetermined slot data generated by the packet processing means. do.

The synchronization processing method according to the present invention includes a reception step for receiving a transmitted frame, a time information extraction step for extracting time information indicating a time included in the frame received in the reception step, and the time information extraction. Based on the time indicated by the time information extracted in the step, the time information generation step for generating new time information indicating the time corresponding to the processing performed on the packet included in the frame, and the reception step received. The packet processing step of generating predetermined slot data by subjecting the packet read from the storage means in which the packet contained in the frame to the storage means to multiplex the packet containing the new time information is included. The reception step, the time information extraction step, the time information generation step, and the packet processing step are performed based on a clock signal that is not synchronized with the source of the frame.

The synchronization processing program according to the present invention includes a reception process for receiving a transmitted frame to a computer, a time information extraction process for extracting time information indicating a time included in the frame received in the reception process, and a time information extraction process. Based on the time indicated by the time information extracted by the time information extraction process, the time information generation process for generating new time information indicating the time corresponding to the process applied to the packet included in the frame, and the reception A packet process for generating predetermined slot data by performing a process of multiplexing a packet containing the new time information on the packet read from a storage means in which a packet included in the frame received in the process is stored. The reception process, the time information extraction process, the time information generation process, and the packet process are performed based on a clock signal that is not synchronized with the source of the frame.

According to the present invention, it is possible to prevent the occurrence of a problem even when the clock signals in the processing of the source and the clock signals of the receiving side generated separately have different periods from each other.

It is a block diagram which shows the structural example of the signal processing system of 1st Embodiment. It is a block diagram which shows the configuration example of the transmission side signal processing apparatus. It is a block diagram which shows the structure of the synchronization processing apparatus in 1st Embodiment. It is explanatory drawing which shows the example of the transmission mode. It is explanatory drawing which shows the example of the information bit rate in each transmission mode. It is a block diagram which shows the configuration example of a synthesis processing apparatus. It is a flowchart which shows the operation of the transmission side signal processing apparatus. It is a flowchart which shows the operation of a synchronization processing apparatus. It is a flowchart which shows the operation of a synthesis processing apparatus. It is a block diagram which shows the configuration example of the synchronization processing apparatus of 2nd Embodiment.

Embodiment 1.
The first embodiment will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of the signal processing system 500 of the first embodiment.

As shown in FIG. 1, the signal processing system 500 of the first embodiment includes a synchronization processing device 300 and a synthesis processing device 400. The synchronization processing device 300 and the synthesis processing device 400 are connected to each other. Further, a clock signal providing device 520 is connected to the signal processing system 500. The signal processing system 500 and the clock signal providing device 520 are installed in the contract station 600.

A transmitting side signal processing device 210 is connected to the synchronization processing device 300, for example, via a communication line. Further, a clock signal providing device 220 is connected to the transmitting side signal processing device 210. The transmission side signal processing device 210 and the clock signal providing device 220 are installed in the consignment station 200.

The consignment station 200 is, for example, a station building of a broadcasting company. The contract station 600 is, for example, a station building of a business operator that transmits a signal to a broadcasting satellite.

For example, data corresponding to video and audio is input to the transmission side signal processing device 210. The clock signal providing device 220 is provided with an oscillator that generates a signal having a frequency of, for example, 10 MHz. Then, the clock signal providing device 220 generates a clock signal having a frequency of 33.7561 MHz or the like based on the signal generated by the oscillator, and provides the clock signal to the transmitting side signal processing device 210.

The transmitting side signal processing device 210 generates and transmits an IP (Internet Protocol) packet based on the input data. The IP packet transmitted by the transmitting side signal processing device 210 is received by the synchronization processing device 300 via the communication line.

Further, as shown in FIG. 1, in this example, for the sake of simplicity of explanation, one transmitting side signal installed in one consignment station 200 in one synchronization processing device 300 installed in one consignment station 600. It will be described as assuming that the processing device 210 is connected. However, a plurality of synchronization processing devices 300 may be installed in the consignment station 600 and may be connected to a plurality of transmission side signal processing devices installed in each of the plurality of consignment stations. Then, each synchronization processing device 300 may be connected to the synthesis processing device 400. That is, synchronization processing devices 300 corresponding to each of the plurality of consignment stations 200 may be prepared, and each synchronization processing device 300 may be configured to be connected to the synthesis processing device 400.

The synchronization processing device 300 receives the IP packet transmitted by the transmitting side signal processing device 210. Then, the synchronization processing device 300 performs a slot data generation process for generating predetermined slot data based on the IP packet. The predetermined slot data is, for example, a TLV transmission frame based on an inter-station TLV transmission format.

Then, the synthesis processing device 400 generates a transmission signal based on the predetermined slot data generated by the synchronization processing device 300. Specifically, the synthesis processing device 400 generates a transmission signal based on, for example, each predetermined slot data generated by the plurality of synchronization processing devices 300.

The generated transmission signal is transmitted by the transmission equipment 700 toward the broadcasting satellite. Then, the broadcasting satellite that receives the transmission signal transmits the broadcasting signal based on the transmission signal, and the receiver that receives the broadcasting signal reproduces the video or audio based on the broadcasting signal, or is used for data broadcasting. It outputs data, program arrangement information, electronic program guides, etc. The transmission equipment 700 includes, for example, a satellite communication antenna installed outside the station building of the contract station 600.

The clock signal providing device 520 is provided with an oscillator that generates a signal having a frequency of, for example, 5 MHz. Then, the clock signal providing device 220 generates a clock signal having a frequency of 33.7561 MHz or the like based on the signal generated by the oscillator, and provides the clock signal to the synchronization processing device 300 and the synthesis processing device 400.

FIG. 2 is a block diagram showing a configuration example of the transmission side signal processing device 210. As shown in FIG. 2, the transmitting side signal processing device 210 includes an MMT (Moving Picture Experts Group (MMT) Media Transport) multiplexing unit 211 and a TLV multiplexing unit 212.

The MMT multiplexing unit 211 includes playback data, data for data broadcasting, program arrangement information, and an electronic program guide (SI (Service Information) / EPG (Electronic), which are data corresponding to video and audio reproduced by the receiver. The data for Program Guide)) is input.

Then, the MMT multiplexing unit 211 multiplexes each of the input data with each other to generate an MMTP packet which is an MMT format IP packet including each data.

The MMTP packet generated by the MMT multiplexing unit 211 and the NTP packet including the data indicating the time are input to the TLV multiplexing unit 212. The NTP packet is received from, for example, an external NTP server. The TLV multiplexing unit 212 multiplexes the input MMTP packet and the NTP packet with each other to generate an IP packet in a format including the packet.

Then, the TLV multiplexing unit 212 transmits the frame composed of the generated IP packet to the synchronization processing device 300. The frame is a TMCC (Transmission and Multiplexing Configuration) that includes information such as the type of stream (for example, main signal (TLV) including TLV packets) of each slot in the frame, modulation method, coding rate, number of slots used, and the like. Control) Contains basic information.

FIG. 3 is a block diagram showing a configuration example of the synchronization processing device 300. As shown in FIG. 3, the synchronization processing device 300 includes a receiving unit (receiving means) 310, a distributing unit 320, a transmission mode buffer (storage means) 330-1, 330-2, 330-3, 330-4, and an NTP packet. It includes a generation unit (time information generation means) 340, a null packet generation unit (null packet generation means) 350, a multiplexing unit (packet processing means) 360, and a transmission unit 370. In this example, as shown in FIG. 3, four transmission mode buffers 330-1, 330-2, 330-3, and 330-4 are prepared, but the transmission mode buffer is a transmission mode buffer. It may be less than 4, or 5 or more.

The receiving unit 310 receives a frame composed of the IP packet transmitted by the transmitting side signal processing device 210 via the communication line. The receiving unit 310 inputs the received frame to the distribution unit 320.

The distribution unit 320 transmits the TLV packet contained in the input frame to the transmission mode buffers 330-1,330-2,330-3,330-in accordance with the TMCC basic information contained in the input frame. Enter in 4. Further, the distribution unit 320 inputs the NTP packet included in the input frame to the NTP packet generation unit 340 according to the input TMCC basic information.

The input TLV packet is stored in the transmission mode buffers 330-1, 330-2, 330-3, and 330-4. The transmission mode buffers 330-1, 330-2, 330-3, and 330-4 are the modulation method and error correction rate (encoding) applied to the TLV packet included in the TLV slot signal described later by the synthesis processing apparatus 400. Prepared according to the rate). Specifically, in this example, the transmission mode buffer 330 in which the synthesis processing apparatus 400 stores a TLV packet to be modulated by a 16APSK (Amplified and Phase-Shift Keying) method with an error correction coding rate of 7/9. -1, the transmission mode buffer 330-2 that stores TLV packets to be modulated by the QPSK (Quadrature Phase-Shift Keying) method with the error correction coding rate halved, and the error correction coding rate 3 The transmission mode buffer 330-3, which stores TLV packets to be modulated by the 8PSK (Phase-Shift Keying) method, and the TLV packet, which is modulated by the 16APSK method, are stored with the coding rate of error correction being 7/8. The transmission mode buffer 330-4 to be used is prepared.

The NTP packet generation unit 340 generates a new NTP packet indicating the corrected time based on the time indicated by the NTP packet input by the distribution unit 320. Here, the NTP packet contains a value corresponding to the time according to the NTP method. Then, the NTP packet generation unit 340 includes, for example, a value in which a predetermined value according to the time required for processing in the multiplexing unit 360 is added to the value included in the NTP packet input by the distribution unit 320. Generate a new NTP packet. Therefore, the generated new NTP packet indicates a time in which the time indicated by the NTP packet input by the distribution unit 320 is corrected according to the time required for processing in the multiplexing unit 360.

The null packet generation unit 350 generates a null packet having a length corresponding to the modulation method and the coding rate of the TLV packet read from the transmission mode buffer 330 by the multiplexing unit 360. Specifically, the null packet generation unit 350 generates a null packet as necessary so that the TLV slot signal after multiplexing, which will be described later, has a predetermined length (for example, 5610 Bite). Then, the null packet generation unit 350 inputs the generated null packet to the multiplexing unit 360.

The multiplexing unit 360 reads out the TLV packet stored in the transmission mode buffers 330-1, 330-2, 330-3, and 330-4. Then, the multiplexing unit 360 multiplexes the read TLV packet and the NTP packet input by the NTP packet generation unit 340 with each other, and generates a TLV slot signal after multiplexing. The multiplexing unit 360 also multiplexes the null packet generated and input by the null packet generation unit 350, if necessary.

The transmission unit 370 multiplexes the TLV slot signal generated by the multiplexing unit 360 and the TMCC basic information with each other and transmits them to the synthesis processing apparatus 400. The transmission unit 370 regenerates the TMCC basic information included in the transmission frame to be transmitted to the synthesis processing apparatus 400 based on the TMCC basic information input by the TMCC information extraction unit 321 described later. Then, the transmission unit 370 multiplexes the regenerated TMCC basic information and the TLV slot signal with each other, and transmits the regenerated TMCC basic information to the synthesis processing apparatus 400.

The receiving unit 310 and the transmitting unit 370 are realized by, for example, a communication circuit. The distribution unit 320, the NTP packet generation unit 340, the null packet generation unit 350, and the multiplexing unit 360 are realized by, for example, a CPU (Central Processing Unit) that executes processing according to program control, or a plurality of circuits. The transmission mode buffers 330-1, 330-2, 330-3, 330-4 are realized by a storage means such as a memory, for example.

Further, as shown in FIG. 3, the distribution unit 320 includes a TMCC information extraction unit 321, a TLV packet extraction unit 322, a hierarchical distribution processing unit 323, and an NTP packet extraction unit 324.

The frame input by the receiving unit 310 is input to the TMCC information extraction unit 321.

The TMCC information extraction unit 321 extracts TMCC basic information from the frame input by the reception unit 310. Specifically, the TMCC information extraction unit 321 includes, for example, the frame synchronization signal and the slot synchronization signal based on the detection of a predetermined frame synchronization signal or slot synchronization signal in the frame input by the reception unit 310. Extract TMCC basic information. Then, the TMCC information extraction unit 321 inputs the extracted TMCC basic information to the TLV packet extraction unit 322, the hierarchical distribution processing unit 323, the multiplexing unit 360, and the transmission unit 370. Further, the input frame is input to the TLV packet extraction unit 322.

The TLV packet extraction unit (packet extraction means) 322 extracts a TLV packet from a frame input by the TMCC information extraction unit 321 based on the TMCC basic information input by the TMCC information extraction unit 321. Then, the TLV packet extraction unit 322 inputs the extracted TLV packet to the hierarchical distribution processing unit 323 and the NTP packet extraction unit 324. Further, the TLV packet extraction unit 322 discards null packets and dummy slots included in the frame input by the TMCC information extraction unit 321.

The hierarchical distribution processing unit 323 corresponds to each transmission mode (for example, modulation method and coding rate) of the TLV packet input by the TLV packet extraction unit 322 based on the TMCC basic information input by the TMCC information extraction unit 321. Mode) is identified. Then, the hierarchical distribution processing unit 323 inputs each TLV packet into the transmission mode buffers 330-1, 330-2, 330-3, 330-4 corresponding to the transmission mode of each identified TLV packet.

FIG. 4 is an explanatory diagram showing an example of a transmission mode. FIG. 5 is an explanatory diagram showing an example of an information bit rate in each transmission mode. In this example, the transmission mode buffers 330-1, 330-2, 330-3, and 330-4 are prepared so as to correspond to the above-mentioned four types of transmission modes. However, the transmission mode buffer 330 may be prepared to correspond to other transmission modes as illustrated in FIG.

The NTP packet extraction unit (time information extraction means) 324 extracts the NTP packet (time information) from the TLV packet input by the TLV packet extraction unit 322. Specifically, the NTP packet extraction unit 324 extracts, for example, a packet whose destination port number is 0x7B in the UDP (User Datagram Protocol) header, with the IP address ending at 0x101 as the destination in the TLV packet. do. Then, the NTP packet extraction unit 324 inputs the extracted NTP packet to the NTP packet generation unit 340.

FIG. 6 is a block diagram showing a configuration example of the synthesis processing device 400. As shown in FIG. 6, the synthesis processing apparatus 400 includes a reception unit 401, a synthesis unit 402, a modulation unit (modulation means) 403, and a transmission unit 404.

The receiving unit 401 receives the predetermined slot data transmitted by the transmitting unit 370 of the synchronization processing device 300.

The synthesizing unit 402 synthesizes predetermined slot data received by the receiving unit 401 with each other. Specifically, the synthesizing unit 402 synthesizes slot data with each other, for example, transmitted from a plurality of synchronization processing devices 300 and received by the receiving unit 401. More specifically, for example, the slot data of 40 slots transmitted from the first synchronization processing device corresponding to the A company and the 40 slots transmitted from the second synchronization processing device corresponding to the B company. The slot data and the slot data of 40 slots transmitted from the third synchronization processing device corresponding to the C operator are combined with each other to generate predetermined slot data of 120 slots. Then, the synthesis unit 402 inputs the generated predetermined slot data to the modulation unit 403.

The modulation unit 403 performs error correction processing and modulation processing of a predetermined modulation method on the predetermined slot data input by the synthesis unit 402, and generates a transmission signal which is a signal after each processing.

The transmission unit 404 transmits the transmission signal generated by the modulation unit 403.

Next, the operation of the first embodiment will be described. FIG. 7 is a flowchart showing the operation of the transmission side signal processing device 210.

The MMT multiplexing unit 211 and the TLV multiplexing unit 212 in the transmission side signal processing device 210 perform each processing at a timing based on the clock signal provided by the clock signal providing device 220.

The MMT multiplexing unit 211 multiplexes the reproduction data, the data broadcasting data, the program arrangement information, and the electronic program guide data with each other, and generates an MMTP packet which is an MMT format IP packet including each data. (Step S101).

The TLV multiplexing unit 212 multiplexes the MMTP packet and the NTP packet generated by the MMT multiplexing unit 211 in the process of step S101 to each other, and generates an IP packet in a format including the packet (step S102).

Then, the TLV multiplexing unit 212 constructs a frame including TMCC basic information from the generated IP packet, and transmits the configured frame to the synchronization processing device 300 (step S103).

FIG. 8 is a flowchart showing the operation of the slot data generation processing by the synchronization processing device 300. The synchronization processing device 300 performs each processing at a timing based on the clock signal provided by the clock signal providing device 520.

As shown in FIG. 8, the receiving unit 310 receives the frame transmitted by the transmitting side signal processing device 210 via the communication line (step S201). The receiving unit 310 inputs the received frame to the distribution unit 320.

The TMCC information extraction unit 321 of the distribution unit 320 extracts TMCC basic information from the frame input by the reception unit 310 (step S202). Then, the TMCC information extraction unit 321 inputs the extracted TMCC basic information to the TLV packet extraction unit 322, the hierarchical distribution processing unit 323, the multiplexing unit 360, and the transmission unit 370. Further, the input frame is input to the TLV packet extraction unit 322.

The TLV packet extraction unit 322 of the distribution unit 320 extracts the TLV packet from the frame input by the TMCC information extraction unit 321 (step S203). Then, the TLV packet extraction unit 322 inputs the extracted TLV packet to the hierarchical distribution processing unit 323 and the NTP packet extraction unit 324.

The hierarchical distribution processing unit 323 of the distribution unit 320 identifies each transmission mode of the TLV packet input by the TLV packet extraction unit 322 based on the TMCC basic information input by the TMCC information extraction unit 321. Then, the hierarchical distribution processing unit 323 inputs each TLV packet into the transmission mode buffers 330-1, 330-2, 330-3, 330-4 corresponding to the transmission mode of each identified TLV packet (step S204). ). Each TLV packet input by the hierarchical distribution processing unit 323 is stored in one of the transmission mode buffers 330-1, 330-2, 330-3, and 330-4.

The NTP packet extraction unit 324 of the distribution unit 320 extracts the NTP packet from the TLV packet input by the TLV packet extraction unit 322 based on the TMCC basic information input by the TMCC information extraction unit 321 (step S205). Then, the NTP packet extraction unit 324 inputs the extracted NTP packet to the NTP packet generation unit 340.

The NTP packet generation unit 340 generates a new NTP packet indicating the corrected time based on the time indicated by the NTP packet input by the NTP packet extraction unit 324 (step S206). Then, the NTP packet generation unit 340 inputs the generated NTP packet to the multiplexing unit 360.

The multiplexing unit 360 reads the TLV packet from the transmission mode buffers 330-1, 330-2, 330-3, 330-4 at the timing based on the clock signal provided by the clock signal providing device 520. Then, the multiplexing unit 360 multiplexes the read TLV packet and the NTP packet generated by the NTP packet generation unit 340 with each other based on the TMCC basic information to generate a TLV slot signal (step S207).

The NTP packet is multiplexed at the head position of the TLV slot signal, for example. Further, the null packet generation unit 350 generates a null packet required for the process of step S207 and inputs it to the multiplexing unit 360. Then, in the process of step S207, the multiplexing unit 360 multiplexes the TLV slot signal and the null packet with each other, if necessary.

The transmission unit 370 multiplexes the TLV slot signal generated by the multiplexing unit 360 and the TMCC basic information with each other to generate predetermined slot data, and transmits it to the synthesis processing device 400 (step S208).

FIG. 9 is a flowchart showing the operation of the synthesis processing device 400. The synthesis processing apparatus 400 performs each processing at a timing based on the clock signal generated by the clock signal providing apparatus 520.

As shown in FIG. 9, the receiving unit 401 receives the predetermined slot data transmitted by the transmitting unit 370 of the synchronization processing device 300 (step S301). The synthesizing unit 402 synthesizes predetermined slot data received by the receiving unit 401 with each other. Then, the synthesis unit 402 inputs the generated predetermined slot data to the modulation unit 403.

The modulation unit 403 performs a modulation process of a predetermined modulation method as a carrier wave at a coding rate of a predetermined error correction according to each slot based on the TMCC basic information contained in the input predetermined slot data by the synthesis unit 402. A transmission signal, which is a signal after modulation processing, is generated (step S302).

The transmission unit 404 transmits the transmission signal generated by the modulation unit 403 (step S303).

According to the present embodiment, the transmitting side signal processing device 210 and the synthesis processing device 400 operate based on the separately generated clock signals, and the synchronization processing device 300 and the synthesis processing device 400 are clock signal providing devices. It operates based on the clock signal generated by the 520. Then, the synchronization processing device 300 responds to the time required for processing applied to the TLV packet based on the NTP packet generated by the transmitting side signal processing device 210 at the timing based on the clock signal generated by the clock signal providing device 520. Generates predetermined slot data including an NTP packet indicating the corrected time.

Therefore, a predetermined slot in which an NTP packet indicating an appropriate time is stored without installing an NTP server in the consignment station 600 or preparing a means for communicating with the NTP server each time a transmission frame is generated. Data can be generated.

Then, since the synthesis processing device 400 operates based on the clock signal generated by the clock signal providing device 520, the transmission signal based on the predetermined slot data can be appropriately transmitted. Therefore, even if the consignment station side and the consignment station side perform processing based on clock signals that are not synchronized with each other, it is possible to prevent the occurrence of a problem.

Embodiment 2.
Next, the synchronization processing system of the second embodiment will be described with reference to the drawings. FIG. 10 is a block diagram showing a configuration example of the synchronization processing system of the second embodiment.

As shown in FIG. 10, the synchronization processing device 30 of the second embodiment includes a receiving unit 31, a storage unit 33, a time information extraction unit 24, a time information generation unit 34, and a packet processing unit 36.

The synchronization processing device 30 corresponds to, for example, the synchronization processing device 300 in the first embodiment shown in FIGS. 1 and 3. The receiving unit 31 corresponds to, for example, the receiving unit 310 in the first embodiment shown in FIG. The storage unit 33 corresponds to, for example, the transmission mode buffers 330-1, 330-2, 330-3, 330-4 in the first embodiment shown in FIG. The time information extraction unit 24 corresponds to, for example, the NTP packet extraction unit 324 in the first embodiment shown in FIG. The time information generation unit 34 corresponds to, for example, the NTP packet generation unit 340 in the first embodiment shown in FIG. The packet processing unit 36 corresponds to, for example, the multiplexing unit 360 in the first embodiment shown in FIG.

The receiving unit 31 receives the transmitted frame.

The storage unit 33 stores the packets included in the frame received by the reception unit 31.

The time information extraction unit 24 extracts time information indicating the time included in the frame received by the reception unit 31.

The time information generation unit 34 generates new time information indicating the time corresponding to the processing applied to the packet, based on the time indicated by the time information extracted by the time information extraction unit 24.

The packet processing unit 36 generates predetermined slot data by subjecting the packet read from the storage unit 33 to a process of multiplexing a packet containing the new time information.

Further, the receiving unit 31, the storage unit 33, the time information extracting unit 24, the time information generating unit 34, and the packet processing unit 36 operate based on a clock signal that is not synchronized with the transmission source of the frame. The source of the frame received by the receiving unit 31 corresponds to, for example, the transmitting side signal processing device 210 in the first embodiment.

According to the present embodiment, the source of the frame and the packet processing unit 36 operate based on the separately generated clock signals, and even when the cycles of the clock signals are different from each other, the time is changed. The information generation unit 34 generates new time information indicating the time corresponding to the processing applied to the packet, based on the time indicated by the time information extracted by the time information extraction unit 24.

Therefore, it is possible to generate predetermined slot data in which packets including time information indicating an appropriate time are multiplexed.

24 Time information extraction unit 30, 300 Synchronous processing unit 31, 310, 401 Reception unit 33 Storage unit 34 Time information generation unit 36 Packet processing unit 200 Consignment station 210 Transmitter signal processing unit 211 MMT multiplexing unit 212 TLV multiplexing unit 220, 520 Clock signal provider 320 Distribution unit 321 TMCC information extraction unit 322 TLV packet extraction unit 323 Hierarchical distribution processing unit 324 NTP packet extraction unit 330-1, 330-2, 330-3, 330-4 Transmission mode buffer 340 NTP packet generation Part 350 Null packet generation part 360 Multiplexing part 370, 404 Transmission part 400 Synthesis processing device 402 Synthesis part 403 Modulation part 500 Signal processing system 600 Contract station 700 Transmission equipment

Claims (7)

Receiving means to receive the transmitted frame,
A storage means for storing packets contained in a frame received by the receiving means, and a storage means.
A time information extracting means for extracting time information indicating a time included in a frame received by the receiving means, and a time information extracting means.
A time information generating means that generates new time information indicating a time corresponding to a process applied to the packet based on the time indicated by the time information extracted by the time information extracting means.
A packet processing means for generating predetermined slot data by performing a process of multiplexing a packet containing the new time information on the packet read from the storage means is provided.
The receiving means, the time information extracting means, the time information generating means, and the packet processing means operate based on a clock signal that is not synchronized with the source of the frame .
Further, it includes a null packet generation means for generating a null packet having a length required to obtain the predetermined slot data having a predetermined length according to the transmission mode of the TLV packet included in the packet. ,
The packet processing means interconnects a packet read from the storage means, a packet containing the new time information, and a null packet created by the null packet generation means.
A synchronization processing device characterized by that. The time information generating means generates new time information indicating a time after the time corresponding to the processing applied to the packet has elapsed from the time indicated by the time information extracted by the time information extracting means. Synchronous processing device according to. A packet extraction means for discarding a null packet and extracting a TLV packet from a packet included in a frame received by the receiving means and storing the TLV packet in the storage means is included .
The synchronization processing apparatus according to claim 1 or 2. The synchronization processing device according to any one of claims 1 to 3 , wherein the time information indicates a time by an NTP method. The synchronization processing apparatus according to any one of claims 1 to 4 ,
A signal processing system including a signal processing device including a modulation means for performing modulation processing on the predetermined slot data generated by the packet processing means. The receive step to receive the transmitted frame and
A time information extraction step for extracting time information indicating the time included in the frame received in the reception step, and a time information extraction step.
Based on the time indicated by the time information extracted in the time information extraction step, a time information generation step that generates new time information indicating the time corresponding to the processing performed on the packet included in the frame, and the time information generation step.
A packet that generates predetermined slot data by subjecting the packet read from the storage means in which the packet contained in the frame received in the reception step is stored to the packet containing the new time information. Including processing steps
The reception step, the time information extraction step, the time information generation step, and the packet processing step are performed based on a clock signal that is not synchronized with the source of the frame.
Further, it includes a null packet generation step of generating a null packet having a length required to obtain the predetermined slot data having a predetermined length according to the transmission mode of the TLV packet included in the packet. ,
In the packet processing step, the packet read from the storage means, the packet containing the new time information, and the null packet created in the null packet generation step are multiplexed with each other.
A synchronous processing method characterized by that. On the computer
The reception process to receive the transmitted frame and
The time information extraction process for extracting the time information indicating the time included in the frame received in the reception process, and the time information extraction process.
Based on the time indicated by the time information extracted by the time information extraction process, the time information generation process for generating new time information indicating the time corresponding to the process applied to the packet included in the frame, and the time information generation process.
A packet that generates predetermined slot data by performing a process of multiplexing a packet containing the new time information on the packet read from a storage means in which a packet included in the frame received in the reception process is stored. To execute the process and
The reception process, the time information extraction process, the time information generation process, and the packet process are performed based on a clock signal that is not synchronized with the source of the frame.
Further, a null packet generation process for generating a null packet having a length required to obtain the predetermined slot data having a predetermined length is executed according to the transmission mode of the TLV packet included in the packet. Let me
In the packet processing, the packet read from the storage means, the packet containing the new time information, and the null packet created in the null packet generation processing are multiplexed with each other.
A program for synchronous processing characterized by this.

Images