JP2008211604A - Device, method, and program for judging hierarchy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device, a method and a program for judging hierarchy by which hierarchy of an input packet is judged even when it is not accompanied by TMCC information, etc. <P>SOLUTION: A hierarchy judgment device 100 includes: a multiplex frame pattern storage means 10 for storing a predetermined multiplex frame pattern; a position detection means 20 in the multiplex frame for detecting a position of an input TSP in the multiplex frame; and a hierarchy information generation means 30 for generating hierarchy information added to the input TSP, wherein the position detection means 20 in the multiplex frame is provided with: a TSP judgment part 21 which judges a packet type indicating whether or not the input TSP is a null packet; and a TSP position detection part 23 which detects a position of the input TSP in the multiplex frame pattern 11 and constituted so as to detect the position of the input TSP in the multiplex frame based on a position of zero included in the multiplex frame pattern 11 and an input multiplex frame pattern. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hierarchy determination apparatus, a hierarchy determination method, and a hierarchy determination program for determining a hierarchy of a transport stream packet having a multiple frame structure used in, for example, terrestrial digital broadcasting.

  Terrestrial digital broadcasting started in December 2003 using the UHF band of terrestrial waves in the three major metropolitan areas of Tokyo, Osaka, and Nagoya, and is now spreading rapidly.

  A transmission system for digital terrestrial broadcasting in Japan is called ISDB-T (Integrated Services Digital Broadcasting-Terrestrial). In the ISDB-T system, a transport stream (hereinafter referred to as “TS”) defined in MPEG-2 Systems is converted into one TS by re-multiplexing one or a plurality of inputs, and a plurality of transmission line codes are set according to the service intention. After transmission, the information is finally transmitted as one OFDM signal together with TMCC (Transmission and Multiplexing Configuration Control) information, which is information related to the demodulation operation of the receiver, such as the hierarchical structure and transmission parameters. A TS packet converted into an OFDM transmission signal has a multiple frame structure as shown in FIG. A TS packet as valid data transmitted in the X layer of the OFDM signal (X layer is any one of the A layer, B layer, and C layer) and a null (NULL) as an invalid layer that is not finally transmitted as an OFDM signal ) Belonging to any of the packets. In the ISDB-T receiver, the hierarchy of each transport stream packet (hereinafter referred to as “TSP”) can be determined by demodulating the multiplex frame TS based on the TMCC information included in the signal.

  In addition, when digital terrestrial television broadcasting is transmitted to an STL (Studio to Transmitter Link), an interface is provided with a multi-frame TS, so transmission control information for synchronization processing is added to the multiplexing position shown in FIG. 6 during transmission. The

  In this transmission control information, information for distinguishing the hierarchy for each TSP, that is, information for indicating any one of the A hierarchy, the B hierarchy, the C hierarchy, and the invalid hierarchy (hereinafter referred to as “hierarchy index”) is multiplexed. By using this transmission control information, the hierarchy of each TSP can be identified (for example, see Non-Patent Document 1).

  In addition, a terrestrial digital broadcast multiplex frame TS transmission method is disclosed that specifies and deletes the invalid layer TSP from the multiplex frame TS and improves the utilization efficiency of the transmission path (see, for example, Patent Document 1). This method requires TMCC information and a frame synchronization signal from the remultiplexing apparatus separately in specifying the invalid layer.

Some ISDB-T receivers can output multiple frames TS in accordance with the format shown in FIG. 6 based on transmission parameters obtained from TMCC information. However, it is generally expensive and not all receivers can output this type of signal.
ARIB STD-B31 1.6 version Video coding, audio coding and multiplexing in digital broadcasting JP 2003-115807 A

  As described above, in the conventional one, TMCC information and transmission control information (hereinafter referred to as “TMCC information etc.”) are necessary when determining the layer of a packet that is layered into a predetermined layer and transmitted. For example, it is difficult to determine the hierarchy of each TSP of a terrestrial digital broadcast multiplex frame TS that is not accompanied by TMCC information or the like, such as a TS once demodulated in an ISDB-T receiver.

  The present invention has been made in view of such a situation, and can determine the layer of an input packet even when TMCC information or the like is not attached to the layered packet based on predetermined layered information. An object of the present invention is to provide a hierarchy determination apparatus, a hierarchy determination method, and a hierarchy determination program.

  The hierarchy determination apparatus of the present invention includes a multiple frame input means for inputting multiplexed frame data including multiplexed packets that are layered in any of a plurality of layers including a specific layer based on predetermined layer information, Multiple frame pattern storage means for storing multiple frame pattern data indicating the relationship between the layered information in the multiple frame and identification information for identifying individual packets in the frame, and each of the input multiple frames Packet position detecting means for detecting the position of the packet based on the position information of the packet of the specific layer included in the data of the multiple frame pattern, and a layer for generating the layer information of the packet from the position information of the packet in the multiple frame And an information generation means.

  With this configuration, the hierarchy determination apparatus of the present invention detects the position of each packet in the input multiplex frame based on the position information of the packet in the specific hierarchy included in the data of the multiplex frame pattern, and uses the detected position information to identify the packet. Since the layer information is generated, the layer of the input packet can be determined even if the layered packet based on the predetermined layered information is not accompanied by TMCC information or the like.

  Further, the hierarchy determination apparatus of the present invention is characterized in that the packet of the specific layer is a null packet, and the packet position detection means includes a packet type determination unit that determines a packet type based on whether or not an input packet is a null packet. And a packet position detection unit that detects a position of the input packet in the multiplexed frame pattern by comparing a position of a specific layer in the multiplexed frame pattern with a position of a null packet in the input multiplexed frame. ing.

  With this configuration, the hierarchy determination apparatus according to the present invention uses a packet of a specific layer as a null packet, compares the position of the null packet in the multiplex frame pattern with the position of the null packet in the input multiplex frame, and receives the input packet in the multiplex frame pattern. Can be detected. Therefore, the hierarchy determination apparatus of the present invention can determine the hierarchy of an input packet even when TMCC information or the like is not attached to a packet hierarchized based on predetermined hierarchy information.

  Furthermore, in the hierarchy determination apparatus of the present invention, the hierarchy information generation means acquires hierarchy information corresponding to the position information of the input packet detected by the packet position detection unit from the multiple frame pattern storage means. It has the structure provided with the part.

  With this configuration, the hierarchy determination apparatus according to the present invention acquires the hierarchy information corresponding to the position information of the input packet detected by the packet position detection unit from the multiple frame pattern storage means, so that the hierarchy is determined based on the predetermined hierarchy information. Even when TMCC information or the like is not attached to the received packet, the hierarchy of the input packet can be determined.

  According to the hierarchy determination method of the present invention, the packet hierarchy is determined by inputting data of a multiplexed frame including a multiplexed packet in any of a plurality of layers including a specific layer based on predetermined layered information. A hierarchy determination method for determining, a multiple frame pattern storage step for storing data of a multiple frame pattern indicating a relationship between the layered information in the multiplexed frame and identification information for identifying individual packets in the frame; A step of inputting the data of the multiplex frame, and a packet position detection step of detecting the position of each packet in the input multiplex frame based on the position information of the packet of the specific layer included in the data of the multiplex frame pattern; A hierarchy information generator for generating hierarchy information of the packet from position information of the packet in the multiplex frame It has a configuration including and.

  With this configuration, the layer determination method of the present invention detects the position of each packet in the input multiplex frame based on the position information of the packet in the specific layer included in the data of the multiplex frame pattern, and uses the detected position information to identify the packet. Since the layer information is generated, the layer of the input packet can be determined even if the layered packet based on the predetermined layered information is not accompanied by TMCC information or the like.

  A hierarchy determination program according to the present invention is a hierarchy determination program for causing a computer to function as a hierarchy determination apparatus for determining a hierarchy of hierarchized packets, wherein the computer determines a specific hierarchy based on predetermined hierarchy information. Multiplex frame input means for inputting data of a multiplexed frame including multiplexed packets in any of a plurality of included layers, and for identifying the layered information in the multiplexed frame and individual packets in the frame Multiplex frame pattern storage means for storing multiplex frame pattern data indicating a relationship with the identification information of the packet, and the position of each packet in the specific layer in which the multiplex frame pattern data includes the position of each packet in the input multiplex frame Packet position detecting means for detecting based on the information, and in the multiplexed frame It has a structure to function as hierarchical information generating means for generating the hierarchical information of the packet by the position information of the packet.

  With this configuration, the hierarchy determination program of the present invention detects the position of each packet in the input multiplex frame based on the position information of the packet in a specific layer included in the multiplex frame pattern data, and uses the detected position information to identify the packet. Since the layer information is generated, the layer of the input packet can be determined even if the layered packet based on the predetermined layered information is not accompanied by TMCC information or the like.

  The present invention provides a hierarchy determination apparatus, a hierarchy determination method, and a hierarchy determination method that have the effect of determining the hierarchy of an input packet even when TMCC information or the like is not attached to a packet that is hierarchized based on predetermined hierarchy information A hierarchy determination program can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. An example in which the hierarchy determination apparatus of the present invention is applied to an apparatus for determining the hierarchy of each TSP included in a multiplex frame TS of terrestrial digital broadcasting by the ISDB-T method will be described. Here, the multiplexed frame TS input to the hierarchy determination apparatus of the present invention does not include TMCC information or the like.

  First, the structure of the hierarchy determination apparatus in this Embodiment is demonstrated.

  As shown in FIG. 1, the hierarchy determination apparatus 100 according to the present embodiment includes a multi-frame pattern storage unit 10 that stores a predetermined multi-frame pattern, and a TSP (hereinafter referred to as “input TSP”) that is included in the multi-frame TS. In-multi-frame position detecting means 20 for detecting the position in the multi-frame, and hierarchical information generating means 30 for generating hierarchical information to be added to the input TSP.

  The multiplex frame pattern storage means 10 stores a multiplex frame pattern 11 corresponding to transmission parameters for transmitting a terrestrial digital broadcast multiplex frame TS. Specifically, the multiplex frame pattern 11 includes transmission parameters such as a mode standardized by the ISDB-T system, a guard interval, the number of segments for each layer, a carrier modulation method for each layer, and a convolutional coding rate for each layer. Is determined by Further, the multiplex frame pattern 11 is repeated at a period determined by the mode and the guard interval. In one multiplex frame of the ISDB-T method, once in mode 1, twice in mode 2, and 4 in mode 3. Repeated times.

  For example, when each transmission parameter is mode 3, guard interval 1/8, QPSK (2/3) × 1 segment (A layer) +64 QAM (3/4) × 12 segment (B layer), the multiplexed frame pattern 11 is As shown in FIG. Here, numerical values in parentheses of QPSK and 64QAM, which are carrier modulation schemes, represent convolutional coding rates.

  In FIG. 2, the vertical axis and the horizontal axis are coordinates indicating a TSP number as identification information in a multiplexed frame. Numerical values 1, 2 and 0 associated with TSP numbers from 0 to 1151 are layer indices indicating the A layer, the B layer and the invalid layer, respectively. As shown in FIG. 2, since the TSP number and the TSP hierarchy index of that number are associated with each other, if the TSP number of the input TSP can be obtained, the TSP hierarchy index of that number can be easily obtained. In the present embodiment, since the TMCC information or the like is not attached to the multiplex frame TS, the TSP number of the input TSP is unknown, but if the position of the TSP in the multiplex frame pattern 11 is known, the hierarchical index of the TSP is obtained. be able to. It should be noted that the invalid hierarchy in the present embodiment corresponds to the specific hierarchy described in the claims.

  Returning to FIG. 1, the description of the configuration of the hierarchy determination apparatus 100 will be continued.

  The multi-frame position detection means 20 includes a TSP determination unit 21 that determines a packet type indicating whether or not the input TSP is a null packet, a TSP type storage unit 22 that stores the packet type of the input TSP in an array, and a multiple frame pattern. 11 and a TSP position detector 23 for detecting the position of the input TSP. The intra-multiframe position detection means 20 corresponds to the multiframe input means and the packet position detection means of the present invention.

  The TSP determination unit 21 determines that the packet type is 0 when the input TSP is a null packet, and the packet type is 1 when the input TSP is other than a null packet. Note that the TSP determination unit 21 corresponds to the packet type determination unit of the present invention.

  The TSP type storage unit 22 stores the data of the packet type pattern of the input TSP determined by the TSP determination unit 21 (hereinafter referred to as “input multiple frame pattern”) in an array. In the present embodiment, the number of elements in this array is 1152.

  The TSP position detection unit 23 compares the multiplexed frame pattern 11 stored in the multiplexed frame pattern storage unit 10 with the input multiplexed frame pattern stored in the TSP type storage unit 22, and associates the TSP with the multiplexed frame pattern 11. And the input TSP are detected. Specifically, the TSP position detection unit 23 detects the position of the input TSP in the multiplex frame based on the multiplex frame pattern 11 and the position of 0 included in the input multiplex frame pattern, and the detected position information is included in the multiplex frame. The position information k is output. Note that the TSP position detector 23 corresponds to the packet position detector of the present invention.

  The hierarchy information generating means 30 includes a TSP input unit 31 that inputs a TSP and a hierarchy identifier multiplexing unit 32 that multiplexes a hierarchy identifier to the input TSP.

  The TSP input unit 31 includes an input buffer and sequentially takes input TSPs.

  The hierarchy identifier multiplexing unit 32 generates a hierarchy identifier including a hierarchy index based on the position information k in the multiplexed frame, adds the generated hierarchy identifier to the input TSP, and outputs it. The hierarchy identifier multiplexing unit 32 corresponds to the hierarchy information acquisition unit of the present invention.

  Specifically, the hierarchy identifier multiplexing unit 32 acquires the intra-multiframe position information k from the TSP position detection unit 23, and uses the multi-frame pattern storage unit for the hierarchical index L (k) corresponding to the intra-multiframe position information k. The hierarchy identifier is generated by acquiring from 10. The hierarchy identifier generated here may be the hierarchy index itself, or tag information indicating the A hierarchy, the B hierarchy, or the like.

  Next, the operation of the hierarchy determination apparatus 100 in the present embodiment will be described. First, in order to explain the operation in an easy-to-understand manner, the multiple frame pattern processed by the hierarchy determination apparatus 100 is simplified as shown in FIG. 3, and the outline of the operation will be described with reference to FIGS. Next, the operation of the multi-frame position detecting means 20 will be mainly described with reference to the configuration diagram of FIG. 1 and the flowchart of FIG.

  First, transmission parameters of a terrestrial digital broadcast multiplex frame TS are determined in advance, and a multiplex frame pattern 11 determined by the transmission parameter is stored in the multiplex frame pattern storage means 10. As this multiple frame pattern 11, as shown in FIG. 3 (a), one composed of eight TSPs is used. In FIG. 3A, the variable a indicates the position of the TSP in the multiple frame pattern 11, and the numerical value in each box indicates the hierarchy of each TSP. For example, the TSP layer with a = 1 indicates 2 (B layer), and the TSP layer with a = 2 indicates 0 (invalid layer).

  Next, the intra-multiframe position detection means 20 inputs each TSP of the multiframe TS, and the TSP determination unit 21 determines the packet type of the input TSP.

  FIG. 3B shows the input TSP input to the TSP determination unit 21. As shown in FIG. 3B, it is assumed that the input TSP inputs TSP for one period T (eight) from the T = a = 3 TSP of the multiple frame pattern 11 shown in FIG. The variable i indicates the input order of the TSP and circulates in the range of 0 ≦ i <T. The TSP determination unit 21 determines that the packet type is 0 when the input TSP is a null packet, and 1 when the input TSP is other than the null packet.

  Next, as shown in FIG. 3C, the TSP type storage unit 22 stores the data determined by the TSP determination unit 21 in the packet type array K (i).

  Further, the TSP position detection unit 23 reads the multiplexed frame pattern 11 (FIG. 3A) and compares the read multiplexed frame pattern 11 with the packet type array K (i), thereby multiplexing the position of the input TSP. The position corresponding to the frame pattern 11 is detected.

  Specifically, as shown in FIGS. 3C and 3D, the TSP position detection unit 23 sets the position where the element of the packet type array K (i) is 0 and the element of the multiplex frame pattern 11 is 0. Compare with position. A variable P shown in FIG. 3D represents the difference in the position of the input TSP with respect to the position in the multiple frame pattern 11 (hereinafter referred to as “in-frame position difference”). The TSP position detecting unit 23 increments the intra-frame position difference P starting from the intra-frame position difference P = 0, and the elements of the packet type array K (i) corresponding to all positions where the elements of the multiple frame pattern 11 are 0. Find P for which is zero. In this example, the in-frame position difference P = 3 and the 0 positions of the two coincide. This result indicates that the position obtained by adding P = 3 to the position i of the input TSP is the position of the input TSP in the multiple frame pattern 11. Expressed by a mathematical expression, the position of the input TSP in the multiple frame pattern 11 is (i + P) mod T. Here, modT represents a remainder value of T.

  Subsequently, the TSP position detection unit 23 outputs the intra-multiframe position information k = (i + P) mod T to the hierarchy identifier multiplexing unit 32.

  Next, the layer identifier multiplexing unit 32 outputs the position information k in the multiplexed frame to the multiplexed frame pattern storage unit 10, acquires the layer index L (k) of the input TSP in the multiplexed frame pattern 11, and stores the layer identifier in the input TSP. Is added and output.

  In the packet type determination shown in FIG. 3C, it has been described that the TSP in each layer is not a null packet. However, for example, a null packet is inserted in a layer other than the invalid layer in order to make the transfer rate constant. For example, a determination result as shown in FIG. 3E may be obtained. Therefore, it is necessary to obtain the intra-frame position difference P in consideration of the fact that null packets may be inserted even in layers other than the invalid layer. Details will be described later.

  Next, details of the operation of the multiple frame position detection means 20 will be described with reference to FIGS. FIG. 4 is a flowchart showing the operation of the multiple frame position detection means 20.

  First, each variable will be explained although partially overlapping with the above description. When the input TSP number indicating the input order of the TSPs input by the intra-multiframe position detection means 20 is i, the TSP at this time is TSPi, and the TSP number in the multiframe is a, the layer index corresponding to a is L (a), Let T be the period of the multiple frame pattern. Here, i is incremented every time TSP is input to the in-multiframe position detecting means 20, and circulates in the range of 0 ≦ i <T.

  First, the in-frame position difference P and the pattern continuous matching count C (described later) are initialized (step S11). Next, a variable i indicating the input TSP number is initialized (step S12).

  Subsequently, TSPi is read (step S13), and it is determined whether or not the intra-frame position difference P has been determined (step S14).

  If the intra-frame position difference P is not determined in step S14, the TSP determination unit 21 determines a packet type indicating whether TSPi is a null packet (step S15).

  Next, the TSP type storage unit 22 stores the determination result data of the TSP determination unit 21 in the packet type array K (i) (step S16).

  Next, i and T-1 are compared (step S17). In step S17, if i <T-1 is determined, i is incremented (step S18), and the process returns to step S13.

On the other hand, if it is not determined in step S17 that i <T−1, the TSP position detection unit 23 performs processing for comparing the packet type array K (i) obtained in step S16 with the multiple frame pattern 11. . In this comparison process, in order to avoid confusion, the variable j is used instead of the variable i, and the in-frame position difference P satisfying the following two conditions is calculated for all j in the range of 0 ≦ j <T.
Condition 1: When L ((j + P) modT) is not 0 (1-3), K (j) may be either 1 or 0.
Condition 2: When L ((j + P) modT) is 0, K (j) must be 0.

  First, the variable j is initialized (step S19), and the value of L ((j + P) modT) is read (step S20).

Next, it is determined whether or not Expression (1) is satisfied, that is, whether or not the above Conditions 1 and 2 are satisfied (Step S21).

  If the expression (1) is not satisfied in step S21, the pattern continuous matching count C is initialized (step S22), the intra-frame position difference P is incremented and updated (step S23), and the process returns to step S19.

  On the other hand, if the expression (1) is satisfied in step S21, it is determined whether j = T-1 or not (step S24). If j = T-1, j is incremented and updated. Then (step S25), the process returns to step S20. If j = T−1, the intra-frame position difference P is stored (step S26).

  Subsequently, the pattern continuous matching count C is incremented and updated (step S27). That is, the number C of consecutive pattern matches is a variable that is incremented when the above conditions 1 and 2 are satisfied for all j where 0 ≦ j <T.

  Next, the variable R defined by an integer of 1 or more is compared with the pattern continuous matching count C (step S28). If C ≧ R, the intra-frame position difference P is determined (step S29), and then the process proceeds to step S12. Returning, if C <R, the process returns to step S12. That is, by using the variable R, the intra-frame position difference P can be determined when the layer index is an invalid layer and the packet type is a null packet continuously for one period T or more.

  By using the intra-frame position difference P determined in step S29, the TSP position detector 23 outputs intra-frame position information k = (i + P) modT to the hierarchical identifier multiplexer 32 (step S30), and increments i. And it updates (step S31) and returns to step S13.

  As a result, the hierarchical identifier multiplexing unit 32 can generate a hierarchical identifier by inputting the hierarchical index L (k) corresponding to the intra-frame position information k from the multiplexed frame pattern storage unit 10. Therefore, the TSP output from the hierarchy identifier multiplexing unit 32 includes hierarchy information.

  Note that by programming the above-described operation content, the hierarchy determination apparatus 100 shown in FIG. 1 can be realized by a computer.

  As described above, according to the hierarchy determination apparatus 100 in the present embodiment, the TSP position detection unit 23 multiplexes the input TSP based on the previously stored multiple frame pattern 11 and the zero position included in the input multiple frame pattern. Since the position in the frame is detected, the layer of the packet can be determined even if the layered packet based on the predetermined layered information is not accompanied by TMCC information or the like.

  Therefore, the hierarchy determination apparatus 100 according to the present embodiment extracts, for example, a one-segment broadcasting TS, which is a broadcasting for a mobile body, from a multiplex frame TS of a terrestrial digital broadcasting once demodulated by an ISDB-T receiver. Can be provided.

  Moreover, since the hierarchy determination apparatus 100 in the present embodiment has the above-described configuration, the cost can be reduced as compared with the conventional apparatus that determines the packet hierarchy based on TMCC information or the like.

  In the above-described embodiment, the example in which the hierarchy determining apparatus 100 is applied to the apparatus that determines the hierarchy of each TSP included in the multiplex frame TS of terrestrial digital broadcasting has been described. However, the present invention is not limited to this. The present invention is not limited to this, but can be applied to determining the hierarchies of TSP hierarchized based on predetermined hierarchical information.

  As described above, the hierarchy determination apparatus, the hierarchy determination method, and the hierarchy determination program according to the present invention provide a layer of an input packet even when TMCC information or the like is not attached to a packet layered based on predetermined layered information. This is useful as a hierarchy determination apparatus, a hierarchy determination method, and the like that determine the hierarchy of transport stream packets used in digital terrestrial broadcasting.

The block diagram which shows the structure of the hierarchy determination apparatus in one embodiment of this invention The figure which shows an example of the multiple frame pattern memorize | stored in the hierarchy determination apparatus in one embodiment of this invention The figure for demonstrating the outline | summary of operation | movement in the hierarchy determination apparatus in one embodiment of this invention by making a multi-frame pattern into a simple model. The flowchart which shows operation | movement of the position detection means in the multi-frame of the hierarchy determination apparatus in one embodiment of this invention. The figure which shows the example of the multi-frame structure of remultiplexed TS The figure which shows the multiplexing position of the transmission control information added to the multi-frame TS

Explanation of symbols

10 Multiple Frame Pattern Storage Unit 11 Multiple Frame Pattern 20 Multiple Frame Position Detection Unit (Multiple Frame Input Unit, Packet Position Detection Unit)
21 TSP determination unit (packet type determination unit)
22 TSP type storage unit 23 TSP position detection unit (packet position detection unit)
30 Hierarchical information generation means 31 TSP input unit 32 Hierarchy identifier multiplexing unit (hierarchy information acquisition unit)
100 hierarchy determination device

Claims (5)

Multiplex frame input means for inputting data of a multiplexed frame including multiplexed packets in any of a plurality of layers including a specific layer based on predetermined layered information, and the layered information in the multiplexed frame Multiplex frame pattern storage means for storing data of a multiplex frame pattern indicating the relationship between the packet and identification information for identifying individual packets in the frame, and the position of each packet in the input multiplex frame as the multiplex frame pattern Packet position detecting means for detecting based on the position information of the packet of the specific layer included in the data of the layer, and layer information generating means for generating the layer information of the packet from the position information of the packet in the multiplexed frame The hierarchy determination apparatus characterized by this. The packet of the specific layer is a null packet, and the packet position detecting means includes a packet type determining unit that determines a packet type based on whether or not the input packet input is a null packet, and a position of the specific layer in the multiple frame pattern And a packet position detector that detects the position of the input packet in the multiple frame pattern by comparing the position of the null packet in the input multiple frame . The hierarchical information generation means includes a hierarchical information acquisition unit that acquires hierarchical information corresponding to the position information of the input packet detected by the packet position detection unit from the multiple frame pattern storage unit. Item 3. The hierarchy determination device according to Item 2. A hierarchy determination method for determining a hierarchy of a packet by inputting data of a multiplexed frame including a multiplexed packet in any of a plurality of hierarchies including a specific hierarchy based on predetermined hierarchy information ,
A multi-frame pattern storing step for storing multi-frame pattern data indicating a relationship between the layered information in the multi-frame and identification information for identifying individual packets in the frame, and inputting the multi-frame data A packet position detecting step for detecting the position of each packet in the input multiple frame based on the position information of the packet of the specific layer included in the data of the multiple frame pattern, and the position of the packet in the multiple frame And a hierarchy information generating step of generating hierarchy information of the packet based on information. A hierarchy determination program for causing a computer to function as a hierarchy determination apparatus for determining a hierarchy of hierarchized packets,
A multi-frame input means for inputting data of a multi-frame including a plurality of hierarchized packets in any of a plurality of hierarchies including a specific hierarchies based on predetermined hierarchization information; Multiple frame pattern storage means for storing multiple frame pattern data indicating the relationship between the layered information and identification information for identifying individual packets in the frame, and the position of each packet in the input multiple frame Packet position detecting means for detecting based on the position information of the packet of the specific layer included in the data of the multiple frame pattern, and layer information generating means for generating the layer information of the packet from the position information of the packet in the multiple frame A hierarchy determination program characterized by functioning.

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