JP2019125993A - Multiplexing apparatus and multiplexing method - Google Patents

Abstract

To provide a multiplexing apparatus and a multiplexing method that can prevent the end of a content from being lost when setting of broadcast service layer is changed.SOLUTION: A TLV packet multiplexing apparatus 1 includes a packet input unit 11 that inputs packets of a plurality of layers, a plurality of buffers 131 to 13N corresponding to the plurality of layers, a temporary buffer 13 that temporarily stores a packet when there is a change instruction of the layer, a layer distribution unit 12 that distributes packets to the plurality of buffers 131 to 13N on the basis of the layer, and distributes packets to the temporary buffer 13 when there is a change instruction of the layer, and a TLV packet generation unit 14 that reads the packets from the plurality of buffers 131 to 13N when there is a change instruction of the layer, and reads the packets distributed to the temporary buffer 13 to generate a TLV packet after all the plurality of buffers 131 to 13N become empty.SELECTED DRAWING: Figure 1

Description

  The present technology relates to a multiplexing device and a multiplexing method.

  In terrestrial digital television broadcasting and advanced BS digital broadcasting, a weak layer service called one segment and a strong layer service called full segment are multiplexed in the same channel. In these television broadcasts, it is possible to multiplex and broadcast a plurality of channels in the same channel, or to switch to only one channel depending on the time zone. A broadcasting station side system for such broadcasting uses a multiplexer for multiplexing packets of content.

  For example, according to Patent Document 1, for an IP packet including clock information necessary to synchronize the clock on the receiving side with the clock on the transmitting side, the delay amount is calculated in the input buffer for priority, and encapsulated into a TLV packet. And a transmitter for transmitting a modulated signal by constructing a frame. The frame configuration unit is a unit of transmission path coding, with the TLV packet including clock information and delay amount input from the priority input buffer, the TLV packet not including clock information from the input buffer, and the time information input from the timer. The TLV packet is stored in the slot, and the delay amount is stored in the slot header.

  Also, the frame configuration unit outputs a trigger of a constant cycle to the priority input buffer and input buffer together with a designated amount indicating the amount of bytes that can be stored in the slot based on the time information. Thereby, the TLV packet input corresponding to the trigger is stored in the slot, and a frame is configured. Then, the frame configuration unit outputs the frame configured by the slot to the transmission path coding processing unit. The modulation processing unit inputs the data on which the transmission path coding processing has been performed from the transmission path coding processing unit, performs modulation processing, and generates a modulation signal.

JP, 2011-103568, A

  As described above, the transmitter on the broadcast station side that provides broadcast services of a plurality of layers is configured to be able to change the setting of the layers according to the time zone. However, since there is a time difference in the provision time of the broadcast service of each layer, at the time of changing the setting of the layer, the end of the content may be missing without being provided by the time difference.

  The transmission apparatus disclosed in Patent Document 1 does not provide broadcast services of a plurality of layers, and does not have a configuration for solving the above-mentioned problem.

  An object of the present invention is to provide a multiplexing apparatus and a multiplexing method that can prevent the end of content from being lost when changing the setting of the hierarchy of the broadcast service.

  A multiplexing device according to one aspect of the present invention receives a packet input unit for inputting packets of a plurality of layers, a plurality of buffers corresponding to the plurality of layers, and the packet when instructed to change the layers. A temporary buffer for temporarily storing; a hierarchy distribution unit for distributing the packet to the plurality of buffers based on the hierarchy; and distributing the packet to the temporary buffer when instructed to change the hierarchy; And a TLV packet generation unit for reading out the packet from the plurality of buffers, reading out the packet distributed to the temporary buffer after the plurality of buffers are all emptied, and generating a TLV packet. .

  In the multiplexing method according to another aspect of the present invention, packets of a plurality of layers are input, the packets are distributed to a plurality of buffers corresponding to the plurality of layers, and the packet is temporary when instructed to change layers. When it is instructed to change the layer, the packet is read from the plurality of buffers, and after the plurality of buffers are all emptied, the packet that has been distributed to the temporary buffer is read and the TLV packet is read. Generate

  According to still another aspect of the present invention, there is provided a program comprising: a computer; a packet input unit for inputting packets of a plurality of layers; a plurality of buffers corresponding to the plurality of layers; A temporary buffer for temporarily storing, a hierarchy distribution unit for distributing the packet to the plurality of buffers based on the hierarchy, and distributing the packet to the temporary buffer when instructed to change the hierarchy, and an instruction to change the hierarchy The packet is read out from the plurality of buffers, and the packet is read out from the temporary buffer after all the plurality of buffers become empty to function as a TLV packet generation unit that generates a TLV packet.

  According to the above aspect of the present invention, it is possible to prevent the end of the content from being dropped when the setting of the hierarchy of the broadcast service is changed.

FIG. 1 is a block diagram showing the configuration of the first embodiment. FIG. 2 is a diagram showing an outline of the operation of FIG. FIG. 3 is a flow chart showing the operation of FIG. FIG. 4 is a block diagram showing the configuration of the second embodiment. FIG. 5 is a flow chart showing the operation of FIG. FIG. 6 is a block diagram showing the configuration of the third embodiment. FIG. 7 is a flowchart showing the operation of FIG. FIG. 8 is a diagram showing an example of the configuration of a computer that implements each part of each embodiment.

  A first exemplary embodiment will now be described with reference to the drawings. The TLV packet multiplexer 1 of this embodiment is a digital broadcast transmitter, which multiplexes input video, audio, and data packets to configure each slot, and further configures one frame with 120 slots to perform TLV. Used to generate packets.

  The digital broadcast transmitter can set a plurality of transmission modes in a slot in one frame, configure a layer by each transmission mode, and perform layer transmission of a TLV stream. The setting of the transmission mode is, for example, a setting relating to transmission path coding, and means settings such as a modulation method of transmission main signal, a coding rate of intra-error correction coding, satellite output backoff, and number of allocated slots. . In order to distribute the layer of packets, for example, the correspondence between the identification information of the video, audio and data packets input to the TLV packet multiplexing device 1 and the layer is set in the TLV packet multiplexing device 1 and the TLV packet multiplexing device 1 This is realized by performing layer distribution by packet identification information.

  The transmission mode is set for each slot position in the frame by Transmission & Multiplexing Configuration Control (TMCC) information. When the TMCC information is changed, the TMCC setting message is input to the TLV packet multiplexing device 1. Therefore, it is possible to detect the change of the hierarchy by the TMCC setting telegram. Moreover, the change of the hierarchy is instructed by the IF_IN hierarchy setting telegram before being actually changed by the TMCC information. Therefore, it is possible to detect a hierarchy change instruction by the IF_IN hierarchy setting telegram.

  FIG. 1 is a block diagram showing the configuration of the first embodiment. As shown in FIG. 1, the TLV packet multiplexing device 1 according to this embodiment includes a packet input unit 11, a hierarchy distribution unit 12, N (N is an integer of 2 or more) buffers 131 to 13N, and a temporary A buffer 13 and a TLV packet generator 14 are provided. The packet input unit 11 inputs packets of N layers (N is an integer of 2 or more) having different settings of the transmission mode.

  Buffers 131 to 13 N are provided corresponding to the respective layers, and temporarily store packets distributed based on the layers. The temporary buffer 13 temporarily stores the packet when instructed to change the layer.

  The layer allocation unit 12 is set to correspond to identification information of the video, audio, and data packets input to the TLV packet multiplexing device 1 and the layer, and the layer allocation unit 12 identifies the input packet. Determine the hierarchy of the input packet from the information. Then, the hierarchy distribution unit 12 distributes the packets input to the TLV packet multiplexing device 1 to the plurality of buffers 131 to 13N based on the hierarchy. Also, when there is a hierarchy change instruction by the IF_IN hierarchy setting telegram, the hierarchy distribution unit 12 distributes the input packet to the temporary buffer 13.

  Even if there is a hierarchy change instruction, the TLV packet generation unit 14 continues reading from the plurality of buffers 131 to 13N corresponding to the hierarchy before the change. That is, the TLV packet generation unit 14 reads the packets from the plurality of buffers 131 to 13N corresponding to the hierarchy before the change even after detecting the change instruction of the hierarchy, and after all the plurality of buffers become empty, the temporary buffer Read out the packet that was assigned to 13. Then, the TLV packet generation unit 14 multiplexes the read packets to generate a TLV packet.

  There are various conceivable timings at which the hierarchy distribution unit 12 reads a packet from the temporary buffer 13 and at which the TLV packet generation unit 14 reads the distributed packet. For example, packets are read from the temporary buffer 13 before all the buffers become empty, distributed to the changed hierarchy and temporarily stored in a storage unit (not shown), and all the buffers 131 to 13N are empty. After reaching TLV, the TLV packet generation unit 14 may read the distributed packet from a storage unit (not shown).

  In addition, the TLV packet generation unit 14 reads the packet that has been distributed to the temporary buffer 13 after the hierarchy distribution unit 12 detects a change in the hierarchy by the TMCC setting message after all the plurality of buffers are emptied. The TLV packet generation unit 14 may distribute to the layer after the change, and the distributed packet may be read out.

  The hierarchy distribution unit 12 distributes the packet input from the packet input unit 11 to the plurality of buffers 131 to 13N corresponding to the changed hierarchy. Further, after the reading of the packet distributed to the temporary buffer 13 is completed, the TLV packet generation unit 14 reads the packet distributed to the changed hierarchy from the plurality of buffers 131 to 13N.

  The components of the transmission apparatus according to the first embodiment shown in FIG. 1 and other embodiments described later indicate blocks in units of functions. For example, some or all of the components of the transmission apparatus of each embodiment may be realized by any combination of a computer 50 and a program as shown in FIG. 8, for example. The computer 50 includes, for example, the following configuration.

・ CPU (Central Processing Unit) 51
・ ROM (Read Only Memory) 52
・ RAM (Random Access Memory) 53
The program 54 loaded to the RAM 53
· Storage device 55 for storing the program 54
· Drive device 57 for reading and writing the recording medium 56
・ Communication interface 58 connected to communication network 59
・ Input / output interface 60 for data input / output
・ Bus 61 connecting each component
Each component of each embodiment is realized by the CPU 51 acquiring and executing a program 54 for realizing these functions. For example, in the example of the TLV packet multiplexer 1 of FIG. 1, the function of the packet input unit 11 may be realized by the CPU 51 that has acquired the program 54 performing packet input processing based on the program 54. The functions of the buffers 131 to 13N are, for example, that the CPU 51 that has acquired the program 54 allocates the respective areas to the RAM 53 and temporarily stores the packets distributed to the areas of the buffers 131 to 13N allocated to the RAM 53. May be realized. The temporary buffer 13 temporarily stores the packet in the area of the temporary buffer 13 allocated to the RAM 53 when, for example, the CPU 51 that has acquired the program 54 allocates the area to the RAM 53 and the above-mentioned change instruction of multiple layers is given. A function may be realized by performing processing. The function of the hierarchy distribution unit 12 may be realized by, for example, the CPU 51 that has acquired the program 54 performs a process of distributing packets to the areas of the buffer 131 to the buffer 13N allocated to the RAM 53 and the temporary buffer 13. For example, the TLV packet generation unit 14 may realize a function by causing the CPU 51 that has acquired the program 54 to read a packet from an area allocated to the RAM 53 based on the program 54 and generate a TLV packet.

  The program 54 for realizing the function of each component of each embodiment is stored in advance in, for example, the storage device 55, the ROM 52, or the RAM 53, and may be configured to be read by the CPU 51 as necessary. The program 54 may be supplied to the CPU 51 via the communication network 59, or may be stored in advance in the recording medium 56, and the drive device 57 may read the program and supply it to the CPU 51.

  Next, the operation of this embodiment will be described. FIG. 2 is a diagram showing an outline of the operation of FIG. The example of FIG. 2 is an example in the case where the setting of the hierarchy has been changed from two states of the hierarchy A and the hierarchy B to only one of the hierarchy A.

  As shown in FIG. 2, the packet input unit 11 inputs the packets 201 to 216 to the hierarchy distribution unit. Assuming that the packets 201 to 203 are packets of layer A and the packets 204 to 206 are packets of layer B, the layer distributing unit 12 converts the packets 201 to 203 into a buffer 131 corresponding to layer A as shown in FIG. Distribute to Also, the hierarchy distribution unit 12 distributes the packets 204 to 206 to the buffer 132 corresponding to the hierarchy B.

  The packets distributed to the buffers 131 and 132 and temporarily stored are read from the buffers 131 and 132 by the TLV packet generation unit 14. The slot number N1 is set for the layer A, and the slot number N2 is set for the layer B. The TLV packet generator 14 sets the slot number N1 set for each layer from the buffers 131 and 132 corresponding to each layer, The packet is read out during a period corresponding to N2. Further, the TLV packet generation unit 14 periodically reads packets from a plurality of buffers corresponding to each layer in a predetermined order.

  For example, as shown in FIG. 2, the TLV packet generator 14 first reads the temporarily stored packets 201, 202, and 203 from the buffer 131 for a period corresponding to the slot number N1, and then corresponds to the slot number N2 from the buffer 132. For a period of time, the temporarily stored packets 204 and 205 are read out. As shown in FIG. 2, the packet 206 may not be read because the number of slots N2 set in the layer B is small. In this case, the packet 206 not read out is read out in the next cycle.

  As shown in FIG. 2, it is assumed that an instruction to change the setting so as not to use the layer B is input at the timing when the reading is finished without reading the packet 206 from the buffer corresponding to the layer B.

  If the packets 207 to 210 are distributed to the buffer 131 as in the packets 201, 202, and 203 and read only from the buffer 131 according to the changed setting, the packet 206 remains unread.

  Therefore, in the present embodiment, when the setting change of the hierarchy is instructed by the IF_IN hierarchy setting telegram, the hierarchy distribution unit 12 distributes the packet input from the packet input unit 11 to the temporary buffer 13. Further, even if there is a hierarchy change instruction, the TLV packet generation unit 14 reads a packet from the buffers 131 and 132 corresponding to the hierarchy before change and generates a TLV packet. Then, after all the buffers 131 and 132 corresponding to the layer before change are emptied, the TLV packet generation unit 14 reads the packets 207 to 212 from the temporary buffer 13 and generates a TLV packet. After that, the TLV packet generation unit 14 reads a packet from the buffer corresponding to the post-change layer and generates a TLV packet.

  One cycle after the instruction to change the hierarchy, the TMCC information setting telegram is input to the TLV packet multiplexing device 1, and the TLV packet generation unit 14 starts packet generation with the setting of the changed hierarchy. When the TMCC information setting message is input to the TLV packet multiplexer 1, the TLV packet generator 14 reads the packets 212 from the temporary buffer 13 from the temporary buffer 13, and when the temporary buffer 13 becomes empty, the buffer 131 corresponding to hierarchy A is read. The packets 213 to 216 are read.

  FIG. 3 is a flow chart showing the operation of FIG. In the TLV multiplexing method of this embodiment, the packet input unit 11 inputs packets of a plurality of layers before the change before the layer change is instructed (step S1).

  The hierarchy distribution unit 12 distributes the packet input from the packet input unit 11 to the plurality of buffers 131 to 13N corresponding to the plurality of hierarchies before the change (step S2).

  The TLV packet generation unit 14 reads the packets from the plurality of buffers 131 to 13N corresponding to the plurality of layers before the change of the layer and generates a TLV packet (step S3).

  When there is a hierarchy change instruction by the IF_IN hierarchy setting message, the hierarchy distribution unit 12 distributes the packet input from the packet input unit 11 to the temporary buffer 13 (step S4).

  On the other hand, the TLV packet generation unit 14 generates a TLV packet by reading the packets from the plurality of buffers 131 to 13N corresponding to the plurality of hierarchies before the hierarchy change even if the hierarchy change instruction is given by the IF_IN hierarchy setting telegram. (Step S5).

  Then, the TLV packet generation unit 14 reads out the packet distributed to the temporary buffer 13 and generates a TLV packet after all of the plurality of buffers 131 to 13N corresponding to the hierarchy before change are emptied (step S6) ).

  Thereafter, the packet input unit 11 inputs the packets of the plurality of layers after the change according to the changed layer, and the layer distribution unit 12 copes with the packets input from the packet input unit 11 with the changed layers. To a plurality of buffers 131 to 13N. Further, after the reading of the packet distributed to the temporary buffer 13 is completed, the TLV packet generation unit 14 reads out and multiplexes the packet distributed to the post-change layer from the plurality of buffers 131 to 13N.

  As described above, according to the present embodiment, when there is an instruction to change the setting of the hierarchy, the packet input from the packet input unit is distributed to the temporary buffer, and a plurality of buffers corresponding to the hierarchy before the change are empty. The packet is read until it is reached, and after all are empty, the packet is read from the temporary buffer.

  With this configuration, even when an instruction to change the setting not to use layer B is input at the timing when reading is completed without reading packet 206 from the buffer corresponding to layer B as shown in FIG. It is read out, and then the packet 207 and subsequent ones are read out. Therefore, it is possible to prevent the end of the content from being lost when the setting of the hierarchy is changed.

  Next, a second embodiment will be described. FIG. 4 is a block diagram showing an example of the configuration of the second embodiment. As shown in FIG. 4, the TLV packet multiplexer 2 according to the second embodiment differs from the first embodiment in that either of the packet input unit 11 and the temporary buffer 13 is used as an input of a packet to the hierarchy distribution unit 22. And a selection unit 21 for selecting the Further, unlike the first embodiment, the TLV packet multiplexing apparatus 2 includes a hierarchy change detection unit 23 that detects a hierarchy change instruction and a hierarchy change by the TMCC information setting message.

  Next, the operation of this embodiment will be described. FIG. 5 is a flow chart showing the operation of the second embodiment. As shown in FIG. 5, in the TLV multiplexing method according to the present embodiment, the selection unit 21 first selects the packet input unit 11 as an input of a packet to the hierarchy distribution unit 22 before the change of the hierarchy is instructed. The packets in the plurality of layers before the change input by the packet input unit 11 are input to the layer distribution unit 22 (step S21).

  The hierarchy distribution unit 12 distributes the packet input from the packet input unit 11 to the plurality of buffers 131 to 13N corresponding to the plurality of hierarchies before the change, as in the first embodiment (step S2).

  As in the first embodiment, the TLV packet generation unit 24 reads the packets from the plurality of buffers 131 to 13N corresponding to the plurality of layers before the change of the layer and generates a TLV packet (step S3).

  If there is a hierarchy change instruction by the IF_IN hierarchy setting message, the hierarchy change detection unit 23 detects a hierarchy change (step S22), and the hierarchy distribution unit 12 is input from the packet input unit 11 as in the first embodiment. Packets to the temporary buffer 13 (step S4).

  On the other hand, as in the first embodiment, the TLV packet generation unit 24 reads the packets from the plurality of buffers 131 to 13N corresponding to the plurality of layers before the change of the layer even if the instruction to change the layer is given. A packet is generated (step S5).

  Then, the selection unit 21 detects that all of the plurality of buffers 131 to 13N corresponding to the plurality of hierarchies before change have become empty (step S23), and the temporary as a packet input to the hierarchy distribution unit 22. The buffer 13 is selected (step S24). The hierarchy distribution unit 22 distributes the packets distributed to the temporary buffer 13 based on the changed hierarchy (step S25).

  When the hierarchy is changed by the TMCC setting message, the hierarchy change detection unit 23 detects the change of the hierarchy (step S26), and the TLV packet generation unit 24 is distributed to the temporary buffer 13 as in the first embodiment. The packet is read out to generate a TLV packet (step S6).

  Further, when the hierarchy is changed, the selection unit 21 selects the packet input unit 11 as the input of the packet to the hierarchy distribution unit 22. The hierarchy distribution unit 22 distributes the packet input from the packet input unit 11 to the plurality of buffers 131 to 13N corresponding to the plurality of changed hierarchies (step S28).

  When the reading of the packet distributed to the temporary buffer 13 is completed (step S29), the TLV packet generation unit 14 reads the packets from the plurality of buffers 131 to 13N corresponding to the plurality of layers after changing the layer and performs TLV. A packet is generated (step S30).

  Also in the second embodiment described above, as in the first embodiment, when there is an instruction to change the setting of the hierarchy, the packet input from the packet input unit is distributed to the temporary buffer and corresponds to the hierarchy before the change. The packets are read until all the buffers are empty, and after all are empty, the packets are read from the temporary buffer. Therefore, even according to the present embodiment, even when an instruction to change the setting not to use layer B is input at the timing when reading is completed without reading packet 206 from the buffer corresponding to layer B as shown in FIG. The packet 206 is read, and then the packet 207 and subsequent ones are read. Therefore, it is possible to prevent the end of the content from being lost when the setting of the hierarchy is changed. Can.

  Next, a third embodiment will be described. FIG. 6 is a block diagram showing an example of the configuration of the third embodiment. As shown in FIG. 6, the TLV packet multiplexer 3 according to the third embodiment differs from the first and second embodiments in that a plurality of buffers 131 are input as packets to the TLV packet generator 34. A selection unit 31 is provided to select one of the buffer 13N and the temporary buffer 33. Further, the temporary buffer 33 includes a plurality of areas 331 to 33N corresponding to a plurality of hierarchies, and the hierarchy distribution unit 32 receives the packet input from the packet input unit 11 when the hierarchy change instruction is given by the IF_IN hierarchy setting telegram. Are distributed to a plurality of areas 331 to 33N corresponding to the plurality of hierarchies after the change.

  Next, the operation of this embodiment will be described. FIG. 7 is a flow chart showing the operation of the third embodiment. As shown in FIG. 7, in the TLV multiplexing method according to the present embodiment, before the change of the hierarchy is first instructed, as in the first embodiment, in the plurality of hierarchies before the change input by the packet input unit 11. The packet is input to the hierarchy distribution unit 32. The hierarchy distribution unit 32 distributes the packet input from the packet input unit 11 to the plurality of buffers 131 to 13N corresponding to the plurality of hierarchies before the change, as in the first embodiment (step S2).

  The selection unit 31 sequentially selects a plurality of buffers 131 to 13N corresponding to a plurality of layers before changing the hierarchy as an input of a packet to the TLV packet generation unit 34 (step S31). Then, as in the first and second embodiments, the TLV packet generation unit 34 reads the packets from the plurality of buffers 131 to 13N corresponding to the plurality of layers before the change of the layer and generates a TLV packet (step S3). ).

  If there is a hierarchy change instruction according to the IF_IN hierarchy setting message, the hierarchy change detection unit 35 detects a hierarchy change instruction (step S32), and the hierarchy distribution unit 32 converts the packet input from the packet input unit 11 into the temporary buffer 33. Are distributed to a plurality of areas 331 to 33N corresponding to the plurality of layers after the change (step S33).

  On the other hand, the selection unit 31 sequentially selects a plurality of buffers 131 to 13N corresponding to a plurality of layers before changing the hierarchy as an input of a packet to the TLV packet generation unit 34 (step S31). As in the first and second embodiments, the TLV packet generation unit 34 reads the packets from the plurality of buffers 131 to 13N corresponding to the plurality of layers before the change of the layer even when the instruction to change the layer is given. A TLV packet is generated (step S5).

  When the hierarchy is changed by the TMCC setting message, the hierarchy change detection unit 35 detects the change of the hierarchy (step S35), and the selection unit 31 selects the plurality of buffers 131 to 13N corresponding to the plurality of hierarchies before the change. When it is detected that all the data has been emptied (step S36), the temporary buffer 33 is selected as an input of the packet to the TLV packet generator 34 (step S37). The TLV packet generator 34 reads the packet distributed to the temporary buffer 33 and generates a TLV packet (step S6).

  Further, when the hierarchy is changed by the TMCC hierarchy setting message, the hierarchy distribution unit 32 distributes the packet input from the packet input unit 11 to the plurality of buffers 131 to 13N corresponding to the plurality of hierarchies after the change ( Step S38). When the reading of the packet distributed to the temporary buffer 13 is completed (step S39), the selecting unit 31 inputs the plurality of buffers 131 to 13N corresponding to the plurality of layers as the input of the packet to the TLV packet generation unit 34. It selects one by one (step S40). The TLV packet generation unit 34 reads the packets from the plurality of buffers 131 to 13N corresponding to the plurality of layers after the change of the hierarchy and generates a TLV packet (step S41).

  Also in the third embodiment described above, in the same way as the first and second embodiments, when there is an instruction to change the setting of the hierarchy, the packet input from the packet input unit is distributed to the temporary buffer, and the hierarchy before the change is made. The packet is read until all the plurality of buffers corresponding to are empty, and after all are empty, the packet is read from the temporary buffer. Therefore, even according to the present embodiment, even when an instruction to change the setting not to use layer B is input at the timing when reading is completed without reading packet 206 from the buffer corresponding to layer B as shown in FIG. The packet 206 is read, and then the packet 207 and subsequent ones are read. Therefore, it is possible to prevent the end of the content from being lost when the setting of the hierarchy is changed.

  As mentioned above, although this invention was demonstrated with reference to embodiment, this invention is not limited to the said embodiment. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

1, 2, 3 TLV packet multiplexing device 11 packet input unit 12, 22, 32 hierarchical distribution unit 13, 33 temporary buffer 131, 13N buffer 14, 24, 34 TLV packet generation unit 21, 31 selection unit 23, 35 hierarchical change Detectors 331, 33N area

Claims (10)

A packet input unit for inputting packets of a plurality of layers;
A plurality of buffers corresponding to the plurality of layers;
A temporary buffer for temporarily storing the packet when instructed to change the layer;
A hierarchy distribution unit that distributes the packet to the plurality of buffers based on the hierarchy, and distributes the packet to the temporary buffer when instructed to change the hierarchy;
A TLV packet for reading the packet from the plurality of buffers when instructed to change the layer, and reading the packet distributed to the temporary buffer after the plurality of buffers are all emptied to generate a TLV packet A generation unit,
A multiplexing device having The hierarchy distribution unit reads the packet from the temporary buffer and distributes the packet to the changed hierarchy.
The multiplexing device according to claim 1, wherein the TLV packet generation unit reads the packet read from the temporary buffer and distributed to the changed layer after all of the plurality of buffers become empty.   3. The multiplexing device according to claim 2, wherein the hierarchy distribution unit reads the packet from the temporary buffer and distributes the packet to the changed hierarchy after the hierarchy is changed.   4. The TLV packet generation unit according to claim 2, wherein the layer is changed, and the packet distributed to the changed layer is read from the plurality of buffers after reading of the packet from the temporary buffer is completed. Description multiplexing device.   The multiplexing according to claim 2 or 3, wherein the hierarchy distributing unit distributes the packet input from the packet input unit to the plurality of buffers corresponding to the changed hierarchy after the hierarchy is changed. Device.   The multiplexing apparatus according to any one of claims 1 to 5, further comprising: a selection unit that selects one of the packet input unit and the temporary buffer as an input of the packet to the hierarchy distribution unit.   The multiplexer according to any one of claims 1 to 5, further comprising: a selection unit that selects any one of the plurality of buffers and the temporary buffer as an input of the packet to the TLV packet generation unit.   The multiplexing apparatus according to any one of claims 1 to 7, further comprising: a hierarchy change detection unit that detects the hierarchy change instruction. Enter multiple layers of packets,
Distributing the packet to a plurality of buffers corresponding to the plurality of layers;
When the layer change instruction is given, the packet is distributed to a temporary buffer,
Reading the packet from the plurality of buffers when instructed to change the layer;
The TLV packet is generated by reading the packet distributed to the temporary buffer after the plurality of buffers are all emptied.
Multiplexing method. Computer,
Packet input unit for inputting packets of multiple layers,
A plurality of buffers corresponding to the plurality of layers,
A temporary buffer for temporarily storing the packet when instructed to change the layer;
A hierarchy distribution unit that distributes the packet to the plurality of buffers based on the hierarchy, and distributes the packet to the temporary buffer when instructed to change the hierarchy;
A TLV packet for reading the packet from the plurality of buffers when instructed to change the layer, and reading the packet distributed to the temporary buffer after the plurality of buffers are all emptied to generate a TLV packet Generation unit,
A program to function as

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