JP2019154010A - Synchronization processing apparatus, signal processing system, synchronization processing method, and synchronization processing program - Google Patents

Abstract

To provide a synchronization processing apparatus capable of preventing the occurrence of a problem due to processing based on a clock signal even when a period of a clock signal of a transmission source and a clock signal generated separately differ from each other.SOLUTION: A reception unit 31 receives a transmitted frame. A storage unit 33 stores a packet included in the received frame. A time information extraction unit 24 extracts time information indicating a time included in the frame. A time information generation unit 34 generates new time information on the basis of the time indicated by the extracted time information. A packet processing unit 36 performs processing for multiplexing a packet read from the storage unit 33 with a packet including the new time information, and generates predetermined slot data. The reception unit 31, the storage unit 33, the time information extraction unit 24, the time information generation unit 34, and the packet processing unit 36 operate on the basis of a clock signal that is not synchronized with the frame transmission source.SELECTED DRAWING: Figure 10

Description

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

  In satellite broadcasting, a signal based on broadcast data transmitted from a signal processing device of each broadcaster (also referred to as a consignment station) is processed by a signal processing device of a consignment station (also referred to as an uplink station). And transmitted to the broadcasting satellite. Each signal processing device of each consignment station and each signal processing device of the consignment station operate at timing based on the clock signal.

  Therefore, the signal processing device of the trust station receives data transmitted from the signal processing device of each trust station via the communication line, and transmits the data to the data at a timing based on the reference clock signal in the trust 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. Patent Document 1 describes that a transmission slotting 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 from an NTP (Network Time Protocol) server, transmits information indicating the clock, and a receiving side generates a clock signal based on the information. Yes.

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

Japanese Patent Laid-Open No. 2006-174299 JP, 2006-195380, A Japanese Patent No. 5987529

  There may be a difference between the period of each clock signal used in the signal processing apparatus of each consignment station and the period of the clock signal used in the signal processing apparatus of the consignment station. As a result, there is a problem that data to be stored is not stored in a predetermined slot in the processing performed in the trust station.

  Therefore, in the system described in Patent Document 1, there is 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 the transmission side and the reception side, which requires a large amount of cost. In the system described in Patent Document 3, each broadcaster's signal processing device must receive data transmitted by a broadcasting satellite, and there is still a problem that a large amount of cost is required.

  Therefore, the present invention provides a synchronous processing device capable of preventing the occurrence of a problem even when the clock signal in the processing of the transmission source and the clock signal on the reception side generated separately differ from each other. An object of the present invention is to provide a signal processing system, a synchronization processing method, and a program for synchronization processing.

  The synchronization processing apparatus according to the present invention includes a receiving unit that receives a transmitted frame, a storage unit that stores a packet included in the frame received by the receiving unit, and a frame received by the receiving unit. Time information extracting means for extracting time information indicating the time, and 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 extracting means 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 including the new time information. Means, the time information extraction means, the time information generation means, and the packet processing means are not synchronized with the transmission source of the frame. And wherein the operating based on the signal.

  The signal processing system according to the present invention includes any one of the synchronization processing devices and a signal processing device including a modulation unit that performs modulation processing on the predetermined slot data generated by the packet processing unit. To do.

  The synchronization processing method according to the present invention includes a reception step of receiving a transmitted frame, a time information extraction step of extracting time information indicating 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 generating step for generating new time information indicating the time corresponding to the processing applied to the packet included in the frame, and the reception step received A packet processing step of generating predetermined slot data by performing a process of multiplexing the packet including the new time information on the packet read from the storage unit in which the packet included in the frame is stored; The reception step, the time information extraction step, the time information generation step, and the packet processing step -Up includes a transmission source of the frame is characterized in that is performed based on a clock signal not synchronized.

  A program for synchronization processing according to the present invention includes: a reception process for receiving a frame transmitted to a computer; a time information extraction process for extracting time information indicating a time included in the frame received in the reception process; Based on the time indicated by the time information extracted in the time information extraction process, the time information generation process for generating new time information indicating the time according 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 the packet including the new time information on the packet read from the storage unit storing the packet included in the frame received in the process; The reception process, the time information extraction process, the time information generation process, and the packet process are performed on the frame. The Xinyuan characterized by being performed based on a clock signal not synchronized.

  According to the present invention, it is possible to prevent the occurrence of a problem even when the periods of the clock signal in the processing of the transmission source and the clock signal of the reception side generated separately differ 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 structural example of a transmission side signal processing apparatus. It is a block diagram which shows the structure of the synchronous processing apparatus in 1st Embodiment. It is explanatory drawing which shows the example of 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 structural example of a synthetic | combination processing apparatus. It is a flowchart which shows operation | movement of the transmission side signal processing apparatus. It is a flowchart which shows operation | movement of a synchronous processing apparatus. It is a flowchart which shows operation | movement of a synthetic | combination processing apparatus. It is a block diagram which shows the structural example of the synchronous processing apparatus of 2nd Embodiment.

Embodiment 1. FIG.
A first embodiment will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of a signal processing system 500 according to 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 composition 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 trust station 600.

  For example, a transmission side signal processing device 210 is connected to the synchronization processing device 300 via a communication line. A clock signal providing device 220 is connected to the transmission 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 broadcaster's office. The commissioned station 600 is, for example, a station of a business that transmits a signal to a broadcasting satellite.

  For example, data corresponding to video or 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 10 MHz, for example. Then, the clock signal providing device 220 generates a clock signal having a frequency such as 33.7561 MHz based on the signal generated by the oscillator, and provides the generated clock signal to the transmission-side signal processing device 210.

  The transmission-side signal processing device 210 generates and transmits an IP (Internet Protocol) packet based on the input data. The IP packet transmitted by the transmission 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 transmission processing signal installed in one consignment station 200 is connected to one synchronization processing device 300 installed in one consignment station 600. A description will be given assuming that the processing device 210 is connected. However, the trust station 600 may be provided with a plurality of synchronization processing devices 300 and connected to a plurality of transmission-side signal processing devices installed in each of the plurality of trust stations. Each synchronization processing device 300 may be connected to the synthesis processing device 400. That is, the synchronization processing device 300 corresponding to each of the plurality of consignment stations 200 may be prepared, and each synchronization processing device 300 may be connected to the synthesis processing device 400.

  The synchronization processing device 300 receives the IP packet transmitted by the transmission side signal processing device 210. Then, the synchronization processing device 300 performs slot data generation processing for generating predetermined slot data based on the IP packet. The predetermined slot data is, for example, a TLV transmission frame based on the 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 each predetermined slot data generated by the plurality of synchronization processing devices 300, for example.

  The generated transmission signal is transmitted by the transmission facility 700 toward the broadcasting satellite. Then, the broadcast satellite that has received the transmission signal transmits a broadcast signal based on the transmission signal, and the receiver that has received the broadcast signal reproduces video and audio based on the broadcast signal, or for data broadcasting. Data, program layout information, electronic program guides, etc. are output. Note that the transmission facility 700 includes, for example, a satellite communication antenna installed outside the trustee 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 such as 33.7561 MHz based on the signal generated by the oscillator, and provides the generated clock signal to the synchronization processing device 300 and the synthesis processing device 400.

  FIG. 2 is a block diagram illustrating a configuration example of the transmission side signal processing device 210. As illustrated in FIG. 2, the transmission-side signal processing device 210 includes an MMT (Moving Picture Experts Group) media transport (MMT) multiplexing unit 211 and a TLV multiplexing unit 212.

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

  Then, the MMT multiplexing unit 211 multiplexes each input data, and generates an MMTP packet that is an MMT format IP packet including each data.

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

  Then, the TLV multiplexing unit 212 transmits the frame configured by the generated IP packet to the synchronization processing device 300. Note that a frame is a TMCC (Transmission and Multiplexing Configuration) that includes information such as the type of stream (for example, main signal (TLV) including a TLV packet (TLV)), a modulation scheme, a coding rate, and the number of used slots. Control) including basic information.

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

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

  The distribution unit 320 transmits the TLV packet included in the input frame according to the TMCC basic information included in the input frame as transmission mode buffers 330-1, 330-2, 330-3, 330-. 4 Also, 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, 330-4. Note that the transmission mode buffers 330-1, 330-2, 330-3, and 330-4 use a modulation scheme and error correction ratio (encoding) performed by the synthesis processing apparatus 400 on a TLV packet included in a TLV slot signal to be described later. Rate). Specifically, in this example, the transmission mode buffer 330 stores the TLV packet in which the synthesis processing apparatus 400 performs modulation of 16 APSK (Amplitude and Phase-Shift Keying) scheme with an error correction coding rate of 7/9. −1, a transmission mode buffer 330-2 in which a TLV packet subjected to QPSK (Quadrature Phase-Shift Keying) modulation with an error correction encoding rate of ½ is stored, and an error correction encoding rate of 3 / 4 and 8PSK (Phase-Shift Keying) modulation TLV packet is stored, and transmission mode buffer 330-3 is stored and error correction coding rate is 7/8 and 16APSK modulation is stored. Transmission mode buffer 330-4 I have been meaning.

  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 includes a value corresponding to the time by the NTP method. The NTP packet generation unit 340 includes, for example, a value obtained by adding a predetermined value corresponding to the time required for processing in the multiplexing unit 360 to the value included in the NTP packet input by the distribution unit 320. A new NTP packet is generated. Therefore, the generated new NTP packet indicates the time when the time indicated by the NTP packet input by the distribution unit 320 is corrected according to the time required for the processing in the multiplexing unit 360.

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

  The multiplexing unit 360 reads the TLV packet stored in the transmission mode buffers 330-1, 330-2, 330-3, 330-4. Then, the multiplexing unit 360 multiplexes the read TLV packet and the NTP packet input by the NTP packet generation unit 340, and generates a multiplexed TLV slot signal. Note that the multiplexing unit 360 also multiplexes the null packet generated and input by the null packet generation unit 350 as necessary.

  Transmitting section 370 multiplexes the TLV slot signal and TMCC basic information generated by multiplexing section 360 with each other and transmits them to 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 device 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 multiplexed information to the synthesis processing device 400.

  The receiving unit 310 and the transmitting unit 370 are realized by a communication circuit, for example. 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 and a plurality of circuits. The transmission mode buffers 330-1, 330-2, 330-3, 330-4 are realized by storage means such as a memory, for example.

  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 reception unit 310 is input to the TMCC information extraction unit 321.

  The TMCC information extracting unit 321 extracts TMCC basic information from the frame input by the receiving unit 310. Specifically, the TMCC information extraction unit 321 includes the frame synchronization signal and the slot synchronization signal based on detecting a predetermined frame synchronization signal or slot synchronization signal in the frame input by the reception unit 310, for example. TMCC basic information is extracted. 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 unit) 322 extracts a TLV packet from the 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 the null packet and the dummy slot included in the frame input by the TMCC information extraction unit 321.

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

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

  The NTP packet extraction unit (time information extraction unit) 324 extracts an NTP packet (time information) from the TLV packet input by the TLV packet extraction unit 322. Specifically, for example, the NTP packet extraction unit 324 extracts, as the NTP packet, the IP address ending at 0x101 and the destination port number of the UDP (User Datagram Protocol) header is 0x7B in the TLV packet. To 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 illustrating a configuration example of the synthesis processing apparatus 400. As illustrated in FIG. 6, the synthesis processing device 400 includes a reception unit 401, a synthesis unit 402, a modulation unit (modulation unit) 403, and a transmission unit 404.

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

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

  Modulation section 403 performs error correction processing and predetermined modulation scheme modulation processing on the predetermined slot data input by combining section 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 apparatus 210.

  Note that the MMT multiplexing unit 211 and the TLV multiplexing unit 212 in the transmission side signal processing device 210 perform each process 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, data broadcasting data, program arrangement information, and electronic program guide data, and generates an MMTP packet that is an IP packet in the MMT format 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, and generates an IP packet including the packet (step S102).

  Then, the TLV multiplexing unit 212 configures a frame including the TMCC basic information with 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 slot data generation processing by the synchronization processing device 300. The synchronous processing device 300 performs each process at a timing based on the clock signal provided by the clock signal providing device 520.

  As illustrated in FIG. 8, the reception unit 310 receives a frame transmitted by the transmission-side signal processing device 210 via a 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 the transmission mode of each 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 to the transmission mode buffers 330-1, 330-2, 330-3, and 330-4 corresponding to the identified transmission mode of each 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, 330-4.

  The NTP packet extraction unit 324 of the distribution unit 320 extracts an 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, and 330-4 at a 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 based on the TMCC basic information to generate a TLV slot signal (step S207).

  Note that the NTP packet is multiplexed at the head position of the TLV slot signal, for example. In addition, the null packet generation unit 350 generates a null packet necessary for the processing in step S207 and inputs the null packet to the multiplexing unit 360. Then, multiplexing section 360 multiplexes the TLV slot signal and the null packet with each other as necessary in the process of step S207.

  Transmitting section 370 multiplexes the TLV slot signal and TMCC basic information generated by multiplexing section 360 to generate predetermined slot data, and transmits it to combining processing apparatus 400 (step S208).

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

  As illustrated in FIG. 9, the reception unit 401 receives predetermined slot data transmitted by the transmission unit 370 of the synchronization processing device 300 (step S301). The combining unit 402 combines 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.

  Based on the TMCC basic information included in the input predetermined slot data, the modulation unit 403 performs modulation processing of a predetermined modulation scheme on a carrier wave at a predetermined error correction coding rate corresponding to each slot. Then, a transmission signal that 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 transmission-side signal processing device 210 and the synthesis processing device 400 operate based on separately generated clock signals, and the synchronization processing device 300 and the synthesis processing device 400 are clock signal providing devices. 520 operates based on the clock signal generated. Then, according to the time required for the processing performed on the TLV packet based on the NTP packet generated by the transmission side signal processing device 210 at the timing based on the clock signal generated by the clock signal providing device 520. Predetermined slot data including an NTP packet indicating the corrected time is generated.

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

  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 entrusting station side and the entrusting station side perform processing based on the clock signals that are not synchronized with each other, it is possible to prevent problems from occurring.

Embodiment 2. FIG.
Next, the synchronous processing system of 2nd Embodiment is demonstrated with reference to drawings. FIG. 10 is a block diagram illustrating a configuration example of a synchronous processing system according to the second embodiment.

  As illustrated in FIG. 10, the synchronization processing device 30 according to the second embodiment includes a reception 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 illustrated 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, and 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 illustrated in FIG. The time information generation unit 34 corresponds to, for example, the NTP packet generation unit 340 in the first embodiment illustrated in FIG. The packet processing unit 36 corresponds to, for example, the multiplexing unit 360 in the first embodiment illustrated in FIG.

  The receiving unit 31 receives the transmitted frame.

  The storage unit 33 stores a packet 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.

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

  The packet processing unit 36 performs processing for multiplexing the packet read from the storage unit 33 with the packet including the new time information, and generates predetermined slot data.

  In addition, the reception unit 31, the storage unit 33, the time information extraction unit 24, the time information generation unit 34, and the packet processing unit 36 operate based on a clock signal that is not synchronized with the frame transmission source. Note that the transmission source of the frame received by the reception unit 31 corresponds to, for example, the transmission-side signal processing device 210 in the first embodiment.

  According to the present embodiment, the frame transmission source and the packet processing unit 36 operate based on the separately generated clock signals, and even if there is a difference in the cycle of the clock signals, Based on the time indicated by the time information extracted by the time information extraction unit 24, the information generation unit 34 generates new time information indicating the time corresponding to the processing applied to the packet.

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

24 Time information extraction unit 30, 300 Synchronization processing device 31, 310, 401 Reception unit 33 Storage unit 34 Time information generation unit 36 Packet processing unit 200 Consigned station 210 Transmission side signal processing device 211 MMT multiplexing unit 212 TLV multiplexing unit 220, 520 Clock signal providing device 320 Distribution unit 321 TMCC information extraction unit 322 TLV packet extraction unit 323 Hierarchy distribution processing unit 324 NTP packet extraction unit 330-1, 330-2, 330-3, 330-4 Transmission mode buffer 340 NTP packet generation Unit 350 null packet generation unit 360 multiplexing unit 370, 404 transmission unit 400 synthesis processing device 402 synthesis unit 403 modulation unit 500 signal processing system 600 consignment station 700 transmission facility

Claims (8)

Receiving means for receiving the transmitted frame;
Storage means for storing a packet included in a frame received by the receiving means;
Time information extracting means for extracting time information indicating the time included in the frame received by the receiving means;
Based on the time indicated by the time information extracted by the time information extraction means, time information generation means for generating new time information indicating the time according to the processing applied to the packet;
Packet processing means for generating predetermined slot data by performing a process of multiplexing the packet including the new time information on the packet read from the storage means;
The reception processing unit, the time information extraction unit, the time information generation unit, and the packet processing unit operate based on a clock signal that is not synchronized with the transmission source of the frame. 2. The time information generation unit generates new time information indicating a time after a time corresponding to a process applied to the packet from a time indicated by the time information extracted by the time information extraction unit. The synchronous processing apparatus described in 1. A packet extracting means for extracting a TLV packet by discarding a null packet from a packet included in a frame received by the receiving means, and storing it in the storage means;
The packet processing unit multiplexes a packet read from the storage unit, a packet including the new time information, and a null packet with each other in order to obtain the predetermined slot data having a predetermined length. The synchronization processing device according to claim 1 or 2. The synchronization processing apparatus according to claim 3, further comprising a null packet generation unit configured to generate the null packet having a length necessary for obtaining the predetermined slot data having the predetermined length. The synchronous processing device according to any one of claims 1 to 4, wherein the time information indicates a time in an NTP system. A synchronization processing device according to any one of claims 1 to 5,
A signal processing system comprising: a modulation unit that performs modulation processing on the predetermined slot data generated by the packet processing unit. A receiving step for receiving the transmitted frame;
A time information extraction step for extracting time information indicating the time included in the frame received in the reception step;
Based on the time indicated by the time information extracted in the time information extraction step, a time information generation step for generating new time information indicating the time according to the processing applied to the packet included in the frame;
A packet for generating predetermined slot data by performing a process of multiplexing the packet including the new time information on the packet read from the storage unit storing the packet included in the frame received in the reception step Processing steps,
The reception processing, 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 transmission source of the frame. On the computer,
A receiving process for receiving the transmitted frame;
A time information extraction process for extracting time information indicating the time included in the frame received in the reception process;
Based on the time indicated by the time information extracted in the time information extraction process, a time information generation process for generating new time information indicating a time corresponding to a process applied to a packet included in the frame;
A packet for generating predetermined slot data by performing a process of multiplexing the packet including the new time information on the packet read from the storage unit in which the packet included in the frame received in the reception process is stored Process and
The synchronization processing program, wherein the reception processing, the time information extraction processing, the time information generation processing, and the packet processing are performed based on a clock signal that is not synchronized with a transmission source of the frame.

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