JP2006245744A - Video signal recording device, information recording medium, and video signal reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a display update interval of an I picture constant during special reproduction in a transport stream in which a PTS value is not added to a PES packet in the transport stream, and arrival time and display time of the I picture are not coincident with each other. <P>SOLUTION: An address, in which a packet including a coding image in the frame is stored, and relative reproduction scheduled time of the coding image in the frame of each packet of the transport stream are calculated. An access time table (40) showing the reproduction scheduled time of the coding image in the frame is prepared and recorded on an information recording medium (30). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video signal recording apparatus that receives a digital broadcast and records the received digital video signal on an information recording medium such as a hard disk, an information recording medium used for the recording, and a digital video signal recorded in the information recording The present invention relates to a video signal recording / reproducing apparatus for reading out and reproducing video.

  In digital broadcasting, video data is generally compressed by an encoding method compliant with MPEG (Moving Picture Coding Experts Group) 2. Video and audio signals encoded by the MPEG2 system are called elementary streams and are incorporated in a data structure called a PES (Packetized Elementary Stream) packet. In BS digital broadcasting and terrestrial digital broadcasting, a combination of a plurality of PES packets is divided into 188-byte fixed-length packets (TS packets), and video and audio are transmitted using a transport stream (TS) as a single bit string. Sending data.

  Since the image data encoded by the MPEG2 method is created based on the preceding and succeeding image data, it is generally not completed with only one image data, and the image signal cannot be decoded. For this reason, a GOP (Group of Pictures) structure is adopted. The GOP structure is an access unit obtained by grouping a plurality of pictures (pictures) of video data. GOP is a picture of three types: I picture (intra (intraframe) encoded image), P picture (forward prediction (interframe) encoded image) and B picture (bidirectional prediction (interframe) encoded image). Composed. Here, the I picture is image information that can be decoded independently of other types of picture data, and the P or B picture is image information that can be decoded using difference information between the previous and next pictures.

  In general, in a video signal recording / reproducing apparatus that records and reproduces image data encoded by the MPEG2 method on an information recording medium such as a hard disk, in special reproduction such as fast-forward or fast-reverse, only the data in the picture is decoded. Special reproduction can be realized by reproducing only an I picture that can be made. However, in the MPEG2 system, since the encoded data of each I, P, B picture has a variable length, the I picture does not appear at every fixed length.

  For this reason, the video and audio PES packets in the transport are separated, the head address of the I picture in the video data and the PTS (Presentation Time Stamp) are extracted from the header of the video PES packet, and the position information of the I picture By searching the address information of the I picture to be reproduced next from the (address) and PTS information, special reproduction such as fast forward and fast reverse can be performed. However, there is a case where the PTS value is not added to the PES packet of the transport stream sent by broadcasting.

  Therefore, a time stamp corresponding to the arrival time is added to each TS packet of the transport stream, indicating the address information of the TS packet including the I picture and the value of the time stamp added to the TS packet including the I picture. An access unit table is created, and special playback such as fast-forward and fast-reverse is performed by searching for address information of the next I picture to be played back using this access unit table during special playback (see, for example, Patent Document 1). .

JP 2003-339019 A

In the conventional video signal recording / reproducing apparatus, the special reproduction scheduled time counter indicating the scheduled reproduction time at the time of special reproduction is operated at the special reproduction set speed (n times), and the value of the special reproduction scheduled time counter and the access unit table Are compared, the I picture having the closest time stamp value is set as the next I picture to be reproduced, the address of this I picture is searched, and this I picture is read from an information recording medium such as a hard disk. In the transport stream where the PTS value is not added to the PES packet in the transport stream and the arrival time of the I picture does not match the display time. , I picture arrival time interval is not constant, and I picture update during special playback is display time There is a problem that does not take place in the interval.

  The present invention has been made in order to solve the above-described problems. A transport in which the PTS value is not added to the PES packet in the transport stream and the arrival time of the I picture does not match the display time. An object of the present invention is to provide a video recording apparatus in which a display update interval of an I picture is constant during special reproduction even for a stream.

This invention
In a video signal recording apparatus for receiving a transport stream including an intra-frame encoded image obtained by intra-frame coding and an inter-frame encoded image obtained by performing inter-frame coding, and recording the transport stream on an information recording medium.
Packet storage means for storing each packet of the transport stream in the information recording medium;
Of the packets stored by the packet storage means, scheduled reproduction time calculation means for calculating a scheduled reproduction time that is a relative time for reproducing and displaying each of the encoded images within the frame;
Of the packets stored by the packet storage means, the address in the information recording medium where the packet containing the intra-frame encoded image is stored, and the intra-frame encoded image obtained by the scheduled reproduction time calculation means An access time table creating means for creating an access time table for storing the reproduction scheduled time in association with information specifying each intra-frame encoded image;
There is provided an image signal recording apparatus comprising: an access time table storing means for storing the access time table in the information recording medium.

  According to the present invention, the address at which a packet including an intra-frame encoded image is stored among the packets of the transport stream and the scheduled reproduction time of the intra-frame encoded image are calculated. Since the access time table indicating the scheduled playback time is created and recorded on the information recording medium, the PTS value is not added to the PES packet in the transport stream by referring to the access time table during special playback. Even in a transport stream in which the arrival time of the intra-frame encoded image and the display time do not coincide with each other, the display update interval of the intra-frame encoded image that is sequentially reproduced can be made constant.

Embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing a video signal recording / reproducing apparatus according to Embodiment 1 of the present invention. The video signal recording / reproducing apparatus of the first embodiment is
TS of an MPEG2 transport stream 1 (including an intra-frame encoded image (I picture) and an intra-frame encoded image (P, B picture)) that are input from the outside. A stream recording / reproducing apparatus that records a packet on an information recording medium 30 such as a hard disk, reproduces the recorded MPEG2 transport stream, and outputs the stream to an external decoder device, and records TS packets on the information recording medium 30 A video signal recording device 31 and a video signal reproduction device 32 for reproducing TS packets stored in the information recording medium 30 are included.

  The video signal recording device 31 includes a time stamp adding unit 2, a reference clock generating unit 3, a time stamp generating unit 4, a TS packet storing unit 5, a video packet detecting unit 6, an I picture detecting unit 7, a time It includes a stamp extraction unit 8, a scheduled reproduction time calculation unit 9, an access time table creation unit 10, and an access time table storage unit 11.

The time stamp adding means 2 adds a time stamp corresponding to the arrival time of each packet to each TS packet of the input transport stream 1. The reference clock generation means 3 generates a recording and reproduction reference clock. The time stamp generating means 4 generates a time stamp that is a reference for recording. The TS packet storage means 5 has a built-in memory for storing a TS packet to which a time stamp is added, and writes and stores the TS packet stored in the memory in the information recording medium 30.
The video packet detector 6 detects a video packet from the TS packet to which the time stamp is added.

The I picture detection means 7 detects an I picture from the video packet detected by the video packet detection means 6.
The time stamp extracting means 8 extracts the time stamp added to the packet including the I picture detected by the I picture detecting means 7.

  The scheduled reproduction time calculation unit 9 calculates the scheduled reproduction time of the I picture detected by the I picture detection unit 7. The scheduled playback time of the I picture means, for example, a relative time when the I picture is played back and displayed on the basis of a playback start time of a series of video information (for example, continuously recorded video information). .

  The access time table creation means 10 is an access time table including the address of the I picture (address in the information recording medium 30) stored in the information recording medium 30 by the packet storage means 5 and the calculated reproduction scheduled time of the I picture. Create This access time table includes addresses (start address and end address) in the information recording medium 30 in which packets including I pictures are stored (stored) in the information recording medium 30 by the packet storage unit 5; In addition, an access time table is created in which the scheduled playback time of the I picture obtained by the scheduled playback time calculation means 9 is stored in association with information specifying each I picture.

  The access time table storage means 11 has a built-in memory for storing the access time table, and writes the access time table stored in the memory into the information recording medium 30 for storage.

In this way, the TS packet storage unit 5 reads from the memory in the packet storage unit 5 and writes it to the information recording medium 30. At this time, in response to the writing of the packet including the I picture to the information recording medium 30, the access time table storage unit 11 stores the access time table corresponding to the corresponding I picture stored in the internal memory in the information recording medium 30. Write.
Note that the access time table storage unit 11 and the TS packet storage unit 5 have a common part, and the access time table storage unit 11 writes to the information recording medium and the TS packet storage unit 5 writes to the information recording medium 30. Writing is performed using a common part, but details of this point are omitted.

The information recording medium 30 includes a packet storage block 12 and a table storage block 13.
The packet storage block 12 stores TS packets.
The table storage block 13 stores an access time table.
The access time table includes a recording address on the information recording medium 30 in which a packet including an I picture is stored, a scheduled reproduction time of the I picture, an arrival time of the I picture (a video signal used for recording on the information recording medium) The time stamp corresponding to the time of arrival at the recording device) is stored in association with the number of each I picture.

  The video signal reproducing device 32 includes an access time table reading unit 14, a navigation control unit 15, a user interface control unit 16, a TS packet reading unit 17, a TS packet buffer 18, a time stamp removing unit 19, and a comparison count. Value generation means 20.

The access time table reading unit 14 reads the access time table from the information recording medium.
The navigation control unit 15 controls reproduction based on the access time table extracted by the access time table reading unit 14.

The user interface control means 16 accepts user operations.
The TS packet reading means 17 reads a TS packet from the information recording medium 30.
The TS packet buffer 18 temporarily stores the TS packets extracted by the TS packet reading unit 17.

The time stamp removing means 19 removes the time stamp from the TS packets stored in the TS packet buffer, and outputs an output transport stream 21.
The comparison count value generation means 20 is for determining the reproduction timing.
Note that the access time table reading unit 14 and the TS packet reading unit 17 have a common part, and reading from the information recording medium by information by the access time table reading unit 14 and information recording medium 30 by the TS packet reading unit 17 are performed. Reading from is performed using the common part, but details of this point are omitted.

The operation of the video signal recording / reproducing apparatus of FIG. 1 configured as described above will be described.
First, the recording operation of the video signal recording device 31 will be described.
In the time stamp generating means 4, a time stamp is generated using the reference clock from the reference clock generating means 3 and supplied to the time stamp adding means 2.
The input transport stream 1 is input to the time stamp adding means 2, and a time stamp indicating the arrival time is added to each TS packet of the input transport stream 1 and supplied to the TS packet storing means 5 and the video packet detecting means 6. Is done.

  The TS packet with time stamp output from the time stamp adding means 2 is recorded in the packet storage block 12 in the information recording medium 30 by the TS packet storage means 5.

  The time-stamped TS packet output from the time stamp adding means 2 is also supplied to the video detecting means 6, and the video packet detecting means 6 converts the video PES packet from the PID (Packet ID) information of the time-stamped TS packet. The included TS packet is extracted and output to the I picture detection means 7.

  In the I picture detection means 7, a TS packet including the start data and end data of the I picture is detected from the TS packet output from the video packet detection means 6, and the start data and end of the I picture thus detected are detected. A TS packet including data is supplied to the tie stamp extraction means 8, the reproduction scheduled time calculation means 9, and the access time table creation means 10.

  In the time stamp extraction means 8, the time stamp value added to the TS packet including the start data of the I picture detected by the I picture detection means 7 is extracted and supplied to the access time table creation means 10.

On the other hand, the scheduled reproduction time calculation means 9 extracts header information and the like necessary for reproducing the I picture from the I picture data detected by the I picture detection means 7, and reproduces the I picture based on this header information. The scheduled time is calculated and supplied to the access time table creation means 10.
The header information includes a frame rate, whether the I picture has been telecine-converted, and if it has been telecine-converted, the I picture corresponds to a top field or a bottom field. Or something.

  In the access time table creation means 10, an access time table is generated from the information output from the time stamp extraction means 8, the reproduction scheduled time calculation means 9, and the I picture detection means 7, and the generated access time table is the access time table. The data is supplied to the storage unit 11 and further written to the table storage block 13 in the information recording medium 30 by the access time table storage unit 11.

  FIG. 2 is a diagram illustrating an example of the configuration of the access time table. As shown in FIG. 2, the access time table 40 includes information specifying a stored I picture, for example, an index value indicating an I picture number, a time stamp value indicating a TS packet arrival time including start data of the I picture, The scheduled reproduction time indicating the reproduction timing of the I picture and the address value in the packet storage block 12 of the TS packet including the start data and the end data of the I picture are stored in association with each other.

  When recording of the transport stream is started, recording of the TS packet is started, and the TS packet including the start data of the first I picture is detected by the I picture detecting means 7, and the time stamp extracting means 8 The time stamp value of the TS packet including the start data of the I picture is output to the access time table creation means 10. The access time table creation means 10 stores the output value of the time stamp extraction means 8 in the time stamp field (TS1) of the first (first) I picture of the access time table.

  On the other hand, the scheduled reproduction time calculation means 9 extracts header information necessary for reproducing the I picture from the TS packet including the start data of the I picture, and the frame rate and picture repeat information included in the header information. From the above, the playback and display timing (scheduled playback time) of the I picture is calculated with reference to the start of playback of a series of video information, and is output to the access time table creation means 10. The access time table creating means 10 stores the information from the scheduled reproduction time calculating means 9 in the scheduled reproduction time column (PT1) of the first I picture of the access time table.

  Further, when the TS packet including the start data of the I picture is stored in the packet storage block 12 by the TS packet storage unit 5, the access time table creation unit 10 acquires the stored address information by the TS packet storage unit 5. Then, it is stored in the start address column (BADD1) of the first I picture of the access time table. When the TS packet including the end data of the I picture is stored in the packet storage block 12 by the TS packet storage unit 5, the access time table creation unit 10 acquires the stored address information by the TS packet storage unit 5. Then, it is stored in the end dress field (EADD1) of the first I picture of the access time table. Similarly, information on the second and third I pictures is also stored in the access time table. An access time table is created by repeating these operations until the end of recording.

  Next, the data structure of data recorded on the information recording medium 30 will be described with reference to FIG. 3A is a diagram showing a physical configuration on the information recording medium 30, and FIG. 3B is a diagram showing a configuration of a data area of the information storage medium 30, and FIG. These are figures which show an example of the data structure of the information recording medium 30 visible through a file system about this information recording medium.

  As shown in FIG. 3A, there is a lead-in area 51 on the outer periphery of the information storage medium 30, and a reference signal and an identification signal necessary for stabilizing recording and reading on the information storage medium 30 are recorded. Yes. Following the lead-in area 51, a data area 52 is provided. Logically valid data is recorded in the data area 52. There is a lead-out area 53 on the innermost periphery, and a reference signal similar to that in the lead-in area 51 is recorded.

  As shown in FIG. 3B, the data area 52 is provided with a first storage area 54 for recording the received video signal on the outer peripheral side, and a packet of a video signal transport stream (hereinafter referred to as a video stream). Is recorded in the first storage area 54. On the other hand, the information necessary for reproducing the video stream recorded in the first storage area 54 is provided with a second storage area 55 different from the first recording area 54 on the inner circumference side, and the second storage area 55 is provided. In the area 55, management information such as an access time table 40 including time information and recording position information of the video stream recorded in the first storage area 54 is stored. That is, the second storage area 55 is a management information storage area for managing files based on video stream data stored in the information storage medium 30.

  When playing back a video stream recorded on the information storage medium 30, the access time table reading means 14 acquires the file management information recorded in the second storage area (all file management information may be acquired). Only the file management information related to the stream to be reproduced may be acquired), the scheduled reproduction time of the video stream packet and the position information (address) on the information recording medium 30 of the packet are acquired from the extracted file management information, TS packet reading means 17 reads the corresponding video stream packet from the first storage area. In general, the data amount of the management information of the video stream is sufficiently smaller than the data amount of the video stream, so the management information of the video stream is recorded together in a storage area different from the video stream. Since the management information of the video stream is recorded in a storage area different from that of the video stream as described above, even when a plurality of video streams are recorded on the information recording medium 30, management of all the recorded video streams is performed. Information can be accessed at high speed.

In the second storage area 55, management information such as volume information of the information storage medium 30 is recorded as file system management information in addition to video stream management information. As shown in FIG. 3C, data in the information recording medium 30 can be handled as a directory or a file via the file system. In the example shown in FIG. 3C, the file system management information file is “SYS.INFO”, and marking information is stored in the “MARK.LINK” file. Also, the video stream data is stored in the 0001. directory under the “STREAM” directory. strm-0003. Stored in the strm file. Also, the management information regarding the video stream data is 0001.txt under the “STREAM_INFO” directory. info-0003. stored in info. The video stream management information includes address information on the video stream data file for conversion between the data stream of the video stream data and the time axis in order to reproduce the video stream, and the scheduled reproduction time for each image. An access time table 40 such as information is included. Since a plurality of video stream data files are recorded in the information recording medium 30, a video stream management information file having access time table information that associates a time area and an address area exists for each video stream data file. To do.
These files are provided under the “AV_ROOT” directory, and the “AV_ROOT” directory itself is provided under the “ROOT” directory.

  Next, the operation of the video signal reproduction device 32 will be described. First, the operation during normal playback will be described. The user interface control unit 16 receives a normal playback instruction from the user and outputs a normal playback command to the navigation control unit 15. The navigation control means 15 receives the normal reproduction command, controls the TS packet reading means 17 to read the TS packet with the time stamp stored in the packet storage block 12, and stores the read TS packet in the TS packet buffer. 18 for temporary storage.

  The comparison count value generating means 20 uses the time stamp at the beginning of the TS packet read by the TS packet reading means 17 as the initial value of the counter, based on the reference clock generated by the reference clock reproducing means 3 in the same way as at the time of recording. A comparison count value is generated. The comparison count value generation means 20 is set to perform counting at a speed instructed by the user's fast forward playback or fast reverse playback. For example, in the case of n times fast forward reproduction, the comparison count value generating means 20 counts up at a speed n times that of normal reproduction.

The time stamp removing unit 19 removes the time stamp and outputs the output transformer when the time stamp value of the TS packet with the time stamp temporarily stored in the TS packet buffer 18 matches the value generated by the comparison count value generating unit 20. Output as port stream 21.
By repeating such an operation, the output interval (display interval) of each TS packet can be matched with the arrival interval of the packet at the time of recording.

  Next, the operation during special playback will be described. When an instruction for fast forward playback or fast reverse playback is given from the user during the normal playback operation, the user interface control means 16 receives a special playback instruction from the user and outputs a special playback command to the navigation control means 15. The navigation control means 15 receives the special reproduction command and controls the access time table reading means 14 to read the access time table 40 stored in the table storage block 13. Further, the navigation control means 15 acquires the current comparison count value from the comparison count value generation means 20.

  The navigation control means 15 searches the time stamp column in the access time table 40, selects the index of the I picture having the time stamp value closest to the current comparison count value, and the scheduled reproduction time of the selected I picture. The value, start address information, and end address information are extracted. The navigation control means 15 sets the extracted reproduction scheduled time value in the comparison count value generation means 20 as a new comparison count value (as an initial value).

  The comparison count value generation means 20 is set so as to perform counting at the speed instructed by the user's fast forward playback or fast reverse playback as described above. For example, in the case of n-times fast-forward playback, the comparison count value generating means 20 counts up at a speed n times that of normal playback, but the scheduled playback time value is extracted by the navigation control means 15 as described above. Then, the comparison count value is replaced (updated) with the extracted reproduction scheduled time value, and counting up is continued from the replaced value (updated value).

  Further, the navigation control means 15 controls the TS packet reading means 17 on the basis of the extracted address information so that the TS packet group including the start data having the time stamp value closest to the current count value is stored from the packet storage block 12. Read and output to TS packet buffer 18. The time-stamped TS packet temporarily stored in the TS packet buffer 18 is time-stamp-removed by the time-stamp removing means 19 without being compared with the count value generated by the comparison count-value generating means 20, unlike during normal reproduction. And output as an output transport stream 21.

  When it is detected that the TS packet group temporarily stored in the TS packet buffer 17 is all output by the time stamp removing means 19, the navigation control means 15 selects the index of the I picture to be reproduced next. That is, the current count value of the comparison count value generating means 20 is acquired, and the index of the I picture having the reproduction scheduled time value closest to the count value acquired from the access time table 40 is selected. The navigation control means 15 extracts start address information and end address information of the I picture having the selected index value. Based on the start address information and end address information of the extracted I picture, the TS packet reading means 17 is controlled to read the packet group of the I picture from the packet storage block 12 and output it to the TS packet buffer 18. The time stamp removing unit 19 removes the time stamp of the TS packet with the time stamp accumulated in the TS packet buffer 18 and outputs it as the output transport stream 21. Thereafter, the special reproduction operation is realized by repeating the same operation.

  Further, when a normal reproduction instruction is given by the user, the navigation control means 15 acquires the current comparison count value from the comparison count value generation means 19. The navigation control means 15 searches the column of the scheduled reproduction time in the access time table 40, selects the index of the I picture having the reproduction scheduled time value closest to the current comparison count value, and the time of the selected I picture. The stamp value, start address information, and end address information are extracted.

  The navigation control means 15 further sets the extracted time stamp value as the count value of the comparison count value generation means 20 (as a new initial value). Further, the count generated by the comparison count value generating means 20 is set so as to operate at a normal speed.

  The navigation control means 15 controls the TS packet reading means 17 based on the extracted address information, reads the TS packet with a time stamp stored in the packet storage block 12 and outputs it to the TS packet buffer 18. The time stamp removing means 19 removes the time stamp and outputs the output transformer when the time stamp value of the TS packet with time stamp temporarily stored in the TS packet buffer 18 matches the value generated by the comparison count value generating means 20. Output as port stream 21. Thereafter, TS packet reading means 17 is controlled according to the data amount without underflow of TS packet buffer 18, and TS packets with a time stamp stored in packet storage block 12 are read and output to TS packet buffer 18. . Normal reproduction is realized by repeating these operations.

  As described above, the recording / reproducing apparatus of the present embodiment has features in the recording apparatus part and the reproducing apparatus part, respectively, and the recording apparatus having only the recording function and the reproducing apparatus having only the reproducing function are also described. The invention can be applied.

It is a block diagram which shows Embodiment 1 of this invention. It is a figure explaining Embodiment 1 of this invention. It is a figure explaining Embodiment 1 of this invention.

Explanation of symbols

  1 input transport stream, 2 time stamp adding means, 3 reference clock generating means, 4 time stamp generating means, 5 TS packet storing means, 6 video packet detecting means, 7 I picture detecting means, 8 time stamp extracting means, 9 reproduction Scheduled time calculation means, 10 access time table creation means, 11 access time table storage means, 12 packet storage block, 13 table storage block, 14 access time table read means, 15 navigation control means, 16 user interface control means, 17 TS packet Reading means, 18 TS packet buffer, 19 time stamp removing means, 20 comparison count value generating means, 21 output transport stream, 30 information recording Medium, 31 video signal recording apparatus, 32 a video signal reproducing apparatus, 40 access time table, 51 lead-in area, 52 a data area, 53 lead-out area, 54 the first storage area, 55 the second storage area.

Claims (10)

In a video signal recording apparatus for receiving a transport stream including an intra-frame encoded image obtained by intra-frame coding and an inter-frame encoded image obtained by performing inter-frame coding, and recording the transport stream on an information recording medium.
Packet storage means for storing each packet of the transport stream in the information recording medium;
Of the packets stored by the packet storage means, scheduled reproduction time calculation means for calculating a scheduled reproduction time that is a relative time for reproducing and displaying each of the encoded images within the frame;
Of the packets stored by the packet storage means, the address in the information recording medium where the packet containing the intra-frame encoded image is stored, and the intra-frame encoded image obtained by the scheduled reproduction time calculation means An access time table creating means for creating an access time table for storing the reproduction scheduled time in association with information specifying each intra-frame encoded image;
An access time table storage means for storing the access time table in the information recording medium.   2. The video signal recording apparatus according to claim 1, further comprising time stamp adding means for adding a time stamp corresponding to the arrival time of each packet to each packet of the received transport stream.   The video signal recording apparatus according to claim 1, wherein the access time table includes a time stamp corresponding to an arrival time of the intra-frame encoded image.   2. The video signal recording apparatus according to claim 1, wherein the scheduled reproduction time calculation unit calculates the scheduled reproduction time of the intra-frame encoded image based on header information of each intra-frame encoded image. . In an information recording medium for recording a transport stream including an intra-frame coded image obtained by intra-frame coding and an inter-frame coded image obtained by performing inter-frame coding,
A block for storing packets of the transport stream;
The access time table information in which the recording address in the information recording medium in which the packet including the intra-frame encoded image is stored in the block and the scheduled reproduction time of the intra-frame encoded image are stored in association with each other is recorded. An information recording medium comprising a block.   6. The information recording medium according to claim 5, wherein the access time table information includes a time stamp corresponding to an arrival time of the intra-frame encoded image. 7. A video signal reproducing apparatus for reproducing a transport stream including an intra-frame encoded image and an inter-frame encoded image obtained from the information recording medium according to claim 5 or 6. ,
An access time table reading unit for reading an access time table including an address at which a packet including an intra-frame encoded image recorded in an information recording medium and a scheduled reproduction time of the intra-frame encoded image are read;
A video signal reproducing apparatus comprising: a packet reading unit that reads a packet including the intra-frame encoded image from the information recording medium with reference to the access time table.   8. The video signal reproducing apparatus according to claim 7, further comprising means for performing reproduction with reference to a scheduled reproduction time in the access time table during special reproduction. In the video signal reproducing device for reproducing the transport stream including the intra-frame encoded image and the inter-frame encoded image which are inter-frame encoded from the information recording medium according to claim 6,
An access time table reading unit for reading an access time table including an address at which a packet including an intra-frame encoded image recorded in an information recording medium and a scheduled reproduction time of the intra-frame encoded image are read;
A packet reading means for reading from the information recording medium a packet including the intra-frame encoded image with reference to the access time table;
When starting normal reproduction, the time stamp of the packet read by the packet reading means is counted as the initial value of the counter,
When starting the special reproduction, the count value generating means for counting the scheduled reproduction time read by the access time table reading means as an initial value;
When switching from normal reproduction to special reproduction, an intra-frame encoded image having a time stamp closest to the count value of the count value generating means is selected as an image to be reproduced first, and then the intra-frame encoding is performed. Set the estimated playback time of the image as an initial value in the count value generating means,
When switching from special reproduction to normal reproduction, an intra-frame encoded image having a reproduction scheduled time closest to the count value of the count value generating means is selected as an image to be reproduced first, and then the intra-frame code is selected. And a control means for setting the time stamp of the digitized image as an initial value in the count value generating means.   10. The video signal reproducing apparatus according to claim 9, wherein the count value generation means counts at a speed corresponding to a speed of the special reproduction at the time of special reproduction.

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