JP2009273065A - Method of analyzing data of digital broadcasting data, program, and digital broadcasting data analyzer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcasting data analyzer can easily specify a TS packet distribution and the like in a transport stream. <P>SOLUTION: The digital broadcasting data analyzer 100 includes a TS data reading part 10 that reads TS data from a TS data storage part 30, a TS data analyzing part 20 that analyzes TS data to store analyzed results into an analyzed data storage part 40, and an analyzed data display part 80 that reads analyzed data from the analyzed data storage part 40 to visually display a TS packet distribution in the TS data on a display 130. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a data analysis method, a program, and a digital broadcast data analysis apparatus for digital broadcast data.

  In digital terrestrial broadcasting, video data and audio data are encoded according to the MPEG2 standard, and the encoded data and additional information are multiplexed and transmitted as data in a TS (Transuport Stream) format. The TS data is decrypted by the receiving device by identifying a program based on the additional information. As data included in the additional information, PSI (Program Specific Information) is defined in MPEG2. In addition, in ARIB (Association of Radio Industries and Businesses), SI (Service Information) is defined. The PSI and SI are composed of tables classified by use as shown below, and detailed information necessary for decoding specific video data and audio data is indicated by descriptors in each table. It is specified.

As shown in FIG. 2, a kind of MPEG-2 TS file of MPEG2 is a file in which video data, audio data, and PSI / SI data are each packetized (TS packet) and multiplexed. is there. PSI is a PMT (Program Map Table) for specifying video data or audio data packets constituting a program, and a PAT (Program Association Table) in which PIDs (PacketIdentification: Packet Identification Information) of packets transmitting the PMT are listed. ) Etc. Conventionally, when analyzing the internal data of this MPEG-2 TS file and displaying the analysis result on a screen or the like, the tree display is performed for each TS packet, the packet is sequentially displayed one by one, the size of the TS packet A display method and an analysis apparatus conscious of units are disclosed (for example, refer to Patent Document 1).
JP 2004-320421 A

  However, in the conventional tree display and sequential display as described above, how video data and audio data are distributed as a program in a TS, whether specific TS packets are periodically inserted, or TS When examining how packets are classified in PID units, all packets must be analyzed based on the TS packet address and PID, and it is easy to know the distribution status of TS packets in the TS file. There was no problem.

  The present invention has been made in view of such problems, and a digital broadcast data analysis method, program, and digital broadcast data analysis capable of easily specifying the distribution status of TS packets in a TS file. An object is to provide an apparatus.

  In order to solve the above-described problems, a data analysis method for digital broadcast data according to the present invention is executed by a computer having a processing unit and capable of accessing data in a transport stream format and a storage unit in which the analysis data is stored. A method for analyzing digital broadcast data, wherein a processing unit reads a transport stream from a storage unit, and a process for detecting a PAT packet from the transport stream read by the reading process Analyzing the detected PAT packet and storing the analysis result in the PAT table of the storage unit, obtaining the PID of the PMT packet from the PAT packet, and extracting each PMT packet from the transport stream based on the PID Process to acquire and analyze each PMT packet acquired Processing for storing the result in the PMT table of the storage unit, processing for extracting the data packet included in the program of the PMT packet from the transport stream based on the PID acquired from the PMT packet for each PMT packet, and extraction And analyzing each of the received data packets and storing the analysis result in the packet table of the storage unit.

  In such a data analysis method for digital broadcast data, the processing unit reads the packet analysis data from the storage unit, and visually displays the distribution of each packet in the transport stream based on the read analysis data. And a treatment.

  At this time, it is preferable that the processing unit visually displays the packet distribution included in each program for each program on the entire transport stream based on the read analysis data.

  A program for causing a computer to execute the data analysis method for digital broadcast data according to the present invention can be created, such as a flexible disk, CD-ROM, magneto-optical disk, semiconductor memory, hard disk, etc. It is stored in a storage medium or storage device. In some cases, it may be distributed as a digital signal via a network or the like. At this time, intermediate processing results are temporarily stored in a storage device such as a main memory.

  The digital broadcast data analyzing apparatus according to the present invention stores a TS data storage unit storing transport stream format data, a PAT table storing PAT packet analysis data, and PMT packet analysis data. An analysis data storage unit composed of a PMT table and a packet table storing analysis data of data packets, a reading unit for reading a transport stream from the TS data storage unit, and transport stream data read by the reading unit The PAT packet is detected, the PAT packet is analyzed, and the analysis result is stored in the PAT table. Based on the PID of the PMT packet acquired from the PAT packet, one or more PMT packets are selected from the transport stream. Acquired and acquired PMT parameters The analysis result is stored in the PMT table, and for each PMT packet, the data packet corresponding to the PMT packet is extracted from the transport stream based on the PID acquired from the PMT packet, and extracted. And an analysis unit that analyzes each of the received data packets and stores the analysis result in a packet table.

  The digital broadcast data analyzing apparatus reads the analysis data of each packet from the display unit and the analysis data storage unit, and visually displays the structure of the transport stream on the display unit based on the read analysis data. It is preferable to further include an analysis data display unit.

  At this time, it is preferable that the analysis data display unit visually displays the distribution of packets included in each program for each program with respect to the entire transport stream on the display unit.

  When the digital broadcast data analysis method, program, and digital broadcast data analysis apparatus according to the present invention are configured as described above, the TS packet distribution and the like in the TS file can be easily specified. As a result, the user who creates the TS file can easily confirm whether the intended TS file has been created and confirm the position of the error packet. In addition, by visually displaying the distribution of programs and the distribution of TS packets, the causes of the above error packets can be identified, and video and audio can stop even if they are not standard errors. In this case, it is possible to assist in identifying the cause of the malfunction.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a digital broadcast data analysis apparatus 100 according to the present embodiment includes a processing unit 110 including a CPU and a memory for processing a data analysis method for digital broadcast data according to the present invention, and a transport stream described later. The storage unit 120 includes an external storage device such as a hard disk for storing files and the like, and a display unit 130 such as a CRT or printer that displays analysis results.

  Further, the processing unit 110 reads the TS data reading unit 10 that reads data in the transport stream format (hereinafter referred to as “TS data”) from the storage unit 120, and analyzes and analyzes the read TS data for each TS packet. A TS data analysis unit 20 that stores the result in the storage unit 120 and an analysis data display unit 80 that visually displays the distribution of each TS packet in the TS data based on the result of the analysis are provided.

  The storage unit 120 includes a TS data storage unit 30 that stores TS data, and an analysis data storage unit 40 that stores analysis results of the TS data. Further, as will be described later, the analysis data storage unit 40 stores a PAT table 50 in which analysis results of PAT packets are stored, a PMT table 60 in which analysis results of PMT packets are stored, video data, audio data, and the like. A packet table 70 in which the analysis results of the TS packets are stored.

  Hereinafter, the data structure of each storage unit will be described. The TS data storage unit 30 stores video data, audio data, PSI / SI data, etc., which are each packetized and multiplexed. As shown in FIG. It is composed of packets (hereinafter referred to as “TS packets”) 31. The TS packet 31 is fixed-length data having a size of 188 bytes, and includes a 4-byte fixed-length header 32 and a payload 33 in which actual data transmitted by the packet is stored. The size of the TS packet 32 is not limited to a fixed length of 188 bytes. For example, when information such as FEC used for error correction when receiving TS data is added, the fixed length of 204 bytes may be used.

  The TS packet 32 includes a packet containing video data and audio data (hereinafter referred to as a data packet), and a packet containing PSI / SI data indicating to which program these video data and audio data belong. Exists. This PSI / SI data includes PAT, PMT, and the like. Hereinafter, TS packets including PAT are PAT packets, TS packets including PMT are PMT packets, and TS packets including video data, audio data, and the like are data. Called a packet.

  The header 33 of the TS packet 32 is configured as shown in FIG. 2B, has a fixed length of 4 bytes, and stores an 8-bit synchronization byte, a 13-bit PID (packet identifier), and other information. Has an area. The synchronization byte indicates the head of the TS packet, and “0x47” is fixedly set. The PID is an identifier indicating what kind of data the TS packet 31 includes. In the case of a PAT packet, “0” is fixedly set in the PID. As shown in FIG. 2C, the payload 33 is called section data in the PAT packet and the PMT packet, and stores PSI / SI data. In the data packet, actual data such as video data and audio data is stored. In the payload 33 of the PAT packet, as shown in FIG. 2D, a list of programs included in the TS data is stored as a PID list of PMT. In addition, the data size, the PAT version, the storage destination address of the PAT packet in the TS, and the like are also stored. The payload 33 of the PMT packet stores a PID list of video data and audio data included in the program and an identifier (Stream Type) for identifying whether the data is video or audio.

  The PAT table 50 has a data structure as shown in FIG. 3A, and includes a PID storage area 51 (“0” is fixedly stored), a PAT version storage area 52, and a TS data storage unit 30. The PAT packet storage destination address storage area 53 and the PMT PID storage area 54 are configured. The PMT table 60 has a data structure as shown in FIG. 3B. The PMT table 60 has a management number storage area 61, a PMT storage area 62, a PMT version storage area 63, and the TS data storage section 30. The PMT packet storage destination address storage area 64 and a plurality of storage areas 65 for storing the types and PIDs of data packets included in the program. The packet table 70 has a data structure as shown in FIG. 3C, and includes a management number storage area 71, a data packet PID storage area 72, and a storage address of the data packet in the TS data storage unit 30. Storage area 73. Each table may be provided with an area for storing information other than the information described above, or may be configured to store TS data as it is, instead of storing information extracted from TS packets. .

  Next, data analysis processing of digital broadcast data performed by the digital broadcast data analysis apparatus 100 shown in FIG. 1 will be described. In this data analysis process, a TS data analysis process (step S100) and an analysis data display process (step S300) are performed. The TS data analysis process (step S100) will be described with reference to the flowchart shown in FIG. 4. First, the TS data reading unit 10 reads TS data from the TS data storage unit 30 and passes it to the TS data analysis unit 20. (Step S110). The TS data analysis unit 20 refers to this TS data for each TS packet and searches for a PID = 0, that is, a PAT packet (step S120). Next, the TS data analysis unit 20 analyzes the acquired PAT packet, and acquires the PAT version, the PMT PID, and the storage destination address of the PAT packet in the TS data storage unit 30 (step S130). Each data (analysis data) acquired by the PAT packet analysis is stored in each area 52 to 54 of the PAT table 50 in the analysis data storage unit 40 (step S140).

  Next, based on the PID of the PMT acquired in the analysis process of the PAT packet, the TS data is referenced for each TS packet, and the PMT packet corresponding to each PID is extracted (step S150). By analyzing the extracted PMT packet, the version of PMT, the storage destination address, and the types and PIDs of a plurality of data packets included in the program are acquired (step S160). Then, the acquired information and the PID of the PMT packet are stored in the areas 62 to 65 of the PMT table 60 in the analysis data storage unit 40 (step S170). The detection, analysis, and storage of analysis data of the PMT packet are performed for all PMT packets obtained by the analysis of the PAT packet.

  Next, the TS data analyzing unit 20 refers to TS data based on the PID of the data packet acquired from the PMT packet, and extracts the data packet included in each PMT (step S180). The extracted data packet is analyzed to obtain the PID of the data packet and the storage address of the data packet in the TS data storage unit 30 (step S90). Then, the acquired PID and storage destination address are stored in the areas 72 and 73 of the packet table 70 in the analysis data storage unit 40 (step S200). Thus, the TS data analysis process ends.

  Next, the analysis data display process (step S300) will be described based on the flowchart of FIG. The analysis data display unit 80 reads the PAT packet, the PMT packet, and the analysis data of the data packet included in each PMT from each table 50, 60, 70 of the analysis data storage unit 40 (step S310), and further stores the TS data. TS data is read from the unit 30 (step S320). Next, the analysis data display unit 80 edits a screen to be displayed on the display unit 130 such as a program distribution in TS data and a TS packet distribution for each program based on these pieces of information (step S330). Is displayed on the display unit 130 (step S340).

  FIG. 6 shows an example of a display screen displayed on the display unit 130. In the display screen 200 shown in FIG. 6, PIDs classified by PAT and PMT are regarded as one program, and analysis data for all programs is displayed. As shown in FIG. 6, the display screen 200 includes an information display screen 210 on which information (parameters and the like) of analysis data is displayed, and a program display screen 220 on which a TS packet distribution for each program is displayed. . The information display screen 210 displays analysis data such as the PAT version, the program number, the PMT PID of the program, the PMT version, the video data PID and the audio data PID included in the program. On the program display screen 220, for each program, the TS packet distribution is visually displayed by coloring the position of the TS packet included in each program. This coloring may be performed in a single color, or may be displayed in different colors for each TS packet type, such as red for video data and blue for audio data. The line number (#) on the information display screen 210 and the line number (#) on the program display screen 220 are associated with each other.

  In the program display screen 220, the left end means the beginning of the TS file, and the right end means the end of the TS file. A slide bar 221 is provided on the program display screen 220, and the display position of the graph can be arbitrarily changed by moving the slide bar 221 left and right. The analysis data display unit 80 edits the program display screen 220 by coloring the area in which the TS packet corresponding to each program is stored, based on the storage address and PID of each TS packet, in a strip shape, and displays the display unit 130. To display. With such a display screen 200, the user can visually understand the distribution of TS packets for each program.

  Next, another example of the display screen displayed on the display unit 130 will be described. The display screen 300 shown in FIG. 7 is an information display screen 310 that displays information on analysis data, and a program display screen 320 that displays the distribution of TS packets included in each program in a graph, as in FIG. And a stream display screen 330 for displaying the TS packet distribution for each PID in detail for one designated program. By displaying the TS packet distribution for each PID existing in the predetermined program on the stream display screen 330, it is possible to visually determine how TS packets related to the program are distributed on the TS data in PID units. Can understand. As an application example of the display screen 300, for example, a program for which details of packet distribution are to be displayed on the information display screen 310 is selected. Next, the slide bar 321 on the program display screen 320 is operated to designate the head position of the TS packet to be displayed in detail. Then, the distribution position of TS packets is displayed on the stream display screen 330 for each PID within a preset display range (second unit, number of packet units, etc.) from the position specified by the slide bar 321. By operating the slide bar 321 to change the display position, it is possible to visually understand the detailed distribution for every PID of all TS packets related to the program.

  The display screen 400 shown in FIG. 8 is configured to have a filter function capable of two-dimensionally displaying the TS packet distribution for each PID in the TS data and displaying only necessary PIDs and programs. Has been. Therefore, it is possible to display only the noticed TS packet or PID. A display screen 400 shown in FIG. 8 has a packet display screen 410 in which the storage address of the TS packet in the TS is displayed on the vertical axis and the PID is displayed on the horizontal axis. The packet display screen 410 displays the TS packet in a table by coloring the position of the TS packet specified from the address and PID. In addition, an icon button 411 is provided on the display screen 400, and the display position of the TS data can be changed by pressing this button. Further, detailed parameters and dumps of the TS packet can be displayed, and these are displayed on the parameter display screen 420 and the dump display screen 430, respectively. The parameter display screen 420 displays TS packet parameters specified by the user (for example, “continuity_counter” indicating continuity). In this way, by displaying the TS packets in a table with addresses and PIDs, it is possible to two-dimensionally display TS packets including which PIDs exist at which positions in the TS data.

  Here, a screen operation procedure and a TS packet distribution grasping procedure will be described in the case where the analysis data display unit 80 is configured to display the display screens 300 and 400 shown in FIGS. In the prior art, TS data is analyzed only from one type of viewpoint, but based on information displayed on the display screens 300 and 400, TS packets can be analyzed from a plurality of viewpoints.

  First, the procedure for changing the display position of the TS packet distribution using the slide bar 321 on the display screen 300 and confirming the detailed information of the desired TS packet will be described. By displaying the display screen 300 shown in FIG. 7, the TS packet distribution of all programs in the entire TS data can be grasped on the program display screen 320. In addition, by specifying a program to be noticed, it is possible to display a detailed TS packet distribution for each PID of the program on the stream display unit 330. Then, by moving the slide bar 321, it is possible to specify the head position of the location to be analyzed in the program, and display the detailed TS packet structure within a predetermined range from the head position on the stream display screen 330. When the display screen 400 shown in FIG. 8 is displayed in this state, TS packets are displayed on the packet display screen 410 from the position previously specified by the slide bar 321. Further, the parameter display screen 420 displays the parameter of the first TS packet at the designated position, and the dump display screen 430 displays the dump data of the first TS packet at the designated position. In this way, it is possible to efficiently display various information of the TS packet to be noticed, and it is possible to easily and in detail understand the TS packet from a plurality of viewpoints.

  Next, a procedure for changing the display position of the TS packet distribution using the icon button 411 on the display screen 400 and confirming the detailed information of the desired TS packet will be described. First, the display screen 400 shown in FIG. 8 is displayed, and TS packets are displayed in a table on the packet display screen 410. By pressing the icon button 411, the display range of the TS packet is changed, and the TS packet distribution in the desired range is displayed on the packet display screen 410. Further, the parameters and dump data of the first TS packet in the changed range are displayed on the parameter display screen 420 and the dump display screen 430, respectively. When the display screen 300 shown in FIG. 7 is displayed in this state, the slide bar 321 moves to the position of the TS packet designated on the display screen 400 and is displayed. From the position of the slide bar 321, the position of the TS packet in the entire TS data can be known on the program display screen 320. Further, on the stream display screen 330, a detailed TS packet distribution for each PID within a predetermined range from the position specified by the slide bar 221 is displayed, and the details of the TS packet of interest can be known.

  An example of a different display screen displayed on the display unit 130 will be described. The display screen 500 shown in FIG. 9 is a packet display screen 510 in which the storage address of the TS packet is displayed on the vertical axis, the PID is displayed on the horizontal axis, and the TS packet distribution is displayed in a table. Parameters of the designated TS packet A parameter display screen 520 for displaying a dump, a dump display screen 530 for displaying a dump, a thumbnail display screen 540 for displaying a thumbnail of video data, and an audio waveform display screen 550 for displaying an audio waveform of audio data. Has been. The analysis data display unit 80 is configured to create a display screen 500 based on the analysis data and TS data and display the display screen 500 on the display unit 130. The display position of the thumbnail and the audio waveform can be changed by moving the scroll bar 541. The thumbnail is displayed for each frame.

  As shown in FIG. 10, the display screen 500 shown in FIG. 9 and the display screen 300 shown in FIG. 7 are used. As shown in FIG. 10, an information display screen 610, a program display screen 620, and a stream display screen. The screen operation procedure using 630 and the grasp procedure of TS packet distribution will be described. In this example, by synchronizing the TS packet distribution with the thumbnail and audio waveform display, it is possible to display from the overall structure of the image data and audio data to the detailed structure. In addition, by associating the TS packet with the video, audio data, and the like included in the TS packet in this way, the position of each other can be specified from either the TS packet or the data. As a result, TS packets can be analyzed from a plurality of viewpoints.

  First, the display screen 500 shown in FIG. 9 is displayed, and a thumbnail of video data, an audio waveform of audio data, a TS packet distribution, parameters, and a dump are displayed. Next, a predetermined thumbnail or audio waveform is selected by moving the scroll bar 541 or clicking the screen on the thumbnail display screen 540 or the audio waveform display screen 550. By this operation, the leading position of the related TS packet is displayed on the packet display screen 510 based on the selected thumbnail or audio waveform. Further, the parameter and dump of the head TS packet are displayed on the parameter display screen 520 and the dump display screen 530, respectively.

  When the display screen 600 shown in FIG. 10 is displayed in this state, the slide bar 621 is moved and displayed to the position of the first TS packet changed on the display screen 500, and the TS data in the entire TS packet of the TS packet is displayed. You can know the position. The stream display screen 630 displays a detailed TS packet distribution for each PID within a predetermined range from the position specified by the slide bar 621.

  Further, the TS packet displayed using the information display screen 710, the program display screen 720, and the stream display screen 730 has the same configuration as the display screen 300 shown in FIG. Based on the distribution, an example will be described that assists in identifying the cause of an error location. In the prior art, since the analysis was performed only from one type of viewpoint, it was difficult to identify the cause of the defect that was not an error in the standard. However, in the present invention, the cause is analyzed by analyzing the TS packet from a plurality of viewpoints. Specific assistance can be provided. This will be described in detail below.

  Here, it is assumed that a part of the audio data of the second program 2 becomes silent as an error. On the information display screen 710 of the display screen 700, select the program, move the slide bar 721 and change the TS packet display position on the stream display screen 730, and observe the detailed TS packet distribution for each PID of the program To do. Then, as shown by a broken line arrow in FIG. 11, when an area without a TS packet of audio data is found, it can be estimated that this is the cause of silence. In order to specify the cause in more detail, the TS packet distribution of the range causing the silence is displayed on the packet display screen 410 of the display screen 400 of FIG. Check how it is configured. As a result, for example, it is possible to grasp that the TS packet of the voice data has not been normally analyzed due to the packet size error of the TS packet, or that it is a complex error, and assist in solving the cause of the error. Can do.

  As described above, when the digital broadcast data analysis apparatus 100 in which the data analysis method for digital broadcast data is implemented is used, the program distribution and program distribution for the TS file are compared to the case where the packet size is displayed as in the prior art. The structure of the entire TS file such as packet distribution for each PID unit can be visually understood. Further, the distribution state of all packets can be two-dimensionally displayed in detail by address and PID. Therefore, it is possible to analyze the focused packet from a plurality of viewpoints with different viewpoints. For example, it provides information for confirming whether the intended TS file has been created, confirming the position of the error packet, and investigating the cause. be able to.

1 is a block diagram of a digital broadcast data analysis apparatus according to an embodiment of the present invention. It is explanatory drawing for demonstrating the data structure of TS data storage part, (a) is explanatory drawing for demonstrating the structure of the transport stream by which TS packet was multiplexed, (b) is the header of TS packet. An explanatory diagram for explaining the structure, (c) an explanatory diagram for explaining the type of payload, (d) an explanatory diagram for explaining the structure of the PAT, and (e) for explaining the structure of the PMT. It is explanatory drawing of. It is explanatory drawing for demonstrating the data structure of an analysis data storage part, (a) is explanatory drawing for demonstrating the structure of a PAT table, (b) is explanatory drawing for demonstrating the structure of a PMT table, c) is an explanatory diagram for explaining the structure of a data packet table. It is a figure which shows the TS data analysis process flow in the data analysis process of digital broadcast data. It is a figure which shows the analysis data display processing flow in the data analysis process of digital broadcast data. It is a figure which shows an example of the display screen displayed on a display part. It is a figure which shows an example of the display screen displayed on a display part. It is a figure which shows an example of the display screen displayed on a display part. It is a figure which shows an example of the display screen displayed on a display part. It is a figure which shows an example of the display screen displayed on a display part. It is a figure which shows an example of the display screen displayed on a display part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 TS data reading part 20 TS data analysis part 30 TS data storage part 40 Analysis data storage part 80 Analysis data display part 100 Digital broadcast data analysis apparatus 110 Processing part 120 Storage part 130 Display part

Claims (7)

A data analysis method executed by a computer having a processing unit and having access to a storage unit storing transport stream format data and analysis data thereof,
By the processing unit,
A reading process of reading a transport stream from the storage unit;
A process of detecting a PAT packet from the transport stream read by the read process;
Processing to analyze the detected PAT packet and store the analysis result in the PAT table of the storage unit;
A process of acquiring the PID of the PMT packet from the PAT packet and acquiring each PMT packet from the transport stream based on the PID;
A process of analyzing each acquired PMT packet and storing an analysis result in a PMT table of the storage unit;
For each PMT packet, based on the PID acquired from the PMT packet, a process of extracting a data packet included in the program of the PMT packet from the transport stream;
A process of analyzing each of the extracted data packets and storing an analysis result in a packet table of a storage unit;
Data analysis method for digital broadcast data including The processing unit is
A process of reading the analysis data of the packet from the storage unit;
Processing for visually displaying the distribution of each packet in the transport stream based on the read analysis data;
The data analysis method for digital broadcast data according to claim 1, further comprising: The processing unit is
3. The digital broadcast data analysis method according to claim 2, wherein a packet distribution included in each program is visually displayed for each program on the entire transport stream based on the read analysis data.   The program for making a computer perform the data analysis method of the digital broadcast data as described in any one of Claims 1-3. A TS data storage unit for storing data in a transport stream format;
An analysis data storage unit including a PAT table in which analysis data of a PAT packet is stored, a PMT table in which analysis data of a PMT packet is stored, and a packet table in which analysis data of a data packet is stored;
A reading unit for reading a transport stream from the TS data storage unit;
The PAT packet is detected from the transport stream data read by the reading unit, the PAT packet is analyzed, the analysis result is stored in the PAT table, and based on the PID of the PMT packet acquired from the PAT packet , Acquiring one or more PMT packets from the transport stream, analyzing each of the acquired PMT packets and storing the analysis result in the PMT table, and for each PMT packet, from the PMT packet An analysis unit that extracts the data packet corresponding to the PMT packet from the transport stream based on the acquired PID, analyzes each of the extracted data packets, and stores an analysis result in the packet table;
A digital broadcast data analyzing apparatus. A display unit;
Reading the analysis data of each packet from the analysis data storage unit, based on the read analysis data, an analysis data display unit that visually displays the structure of the transport stream on the display unit,
The digital broadcast data analysis apparatus according to claim 5, further comprising:   The digital broadcast data analyzing apparatus according to claim 6, wherein the analysis data display unit visually displays a packet distribution included in each program for each program on the entire transport stream on the display unit.