JPH11289516A - Record medium and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce video information from a previously set frame by plurally dividing video information provided with plural frames compress-encoded through a correlation between the frames so as to record in plural recording media. SOLUTION: An input controller 2 fetches inputs from the user of a keyboard 9, a mouse 10, etc., to a bus 8. A memory 3 stores data for a reproducing program, etc., and temporary data. A drive 4 is storage media managing a data block as a file by a program (OS) executing file management and is a driving device of a PC card, a RAM card, etc. A CPU 5 is a controller for executing the reproducing program of stream data, transferring data and adjusting a bus and executes user input/output and OS. An MPEG decoder 6 receives stream data read from the drive 4 through the bus 8 and displays a decoded frame on a monitor 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a recording medium on which video information is recorded and a reproducing apparatus for reproducing the video information recorded on the recording medium.

[0002]

2. Description of the Related Art In recent years, amusement parks and the like have been provided on a vast site with many attractions. In such amusement parks, the description of each attraction is displayed on a monitor or the like for introduction. In such a case, a video or the like for describing the attraction is recorded on a recording medium such as an optical disk. The video is
Reproduction devices installed at a plurality of locations within the vast site of the amusement park repeatedly reproduce the information during the opening hours of the amusement park, and display descriptions of the attractions. Thus, the video is recorded on the optical disc and reproduced by the reproducing device.

[0003] On the other hand, the technology of compression encoding video information is as follows.
MPEG (MovingPicture Experts Gr.)
Oup) method, etc., can record video information for a long time on one optical disc. Such an optical disc records video such as a movie or a concert, and is provided to a general user as a recording medium in place of a video tape, and is used when recording the above-described attraction description video information on the optical disc. There is.

[0004] Here, the moving picture compression coding by the MPEG system is performed by using an intra-coded I picture, a P picture using forward inter-frame prediction coding, and a B picture using bidirectional inter-frame prediction coding. Video information is compression-coded using pictures, and one I picture, a plurality of P pictures, and B pictures constitute a GOP (Group Of Picture). Since the video information compressed and encoded by the MPEG method uses the correlation between frames, it is possible to obtain the video information by reproducing the I picture, the P picture, and the B picture in a predetermined order. it can.

[0005] As described above, the reproducing apparatus used for describing attractions is often installed outside, and when the environment of temperature and humidity changes greatly, the optical disk is distorted or the reproducing surface is changed due to temperature change. It may become cloudy and unreproducible. In addition, in order to cope with long-time continuous reproduction, a driving portion for rotating the optical disk is worn, which may adversely affect reproduction of the optical disk. Such maintenance of the reproducing apparatus for preventing a failure is very troublesome because a plurality of reproducing apparatuses are installed in a large site.

Therefore, as a recording medium replacing the optical disk in the above-mentioned applications, a RAM (Random Access Memory) card and a flash ROM (Read Only Memory) using a semiconductor memory that does not require a driving part such as a rotating unit are read directly from the recording medium. A recording medium such as a read only memory (Card) is conceivable.

[0007]

However, the video information used for the description of attractions as described above is
Since the amount of data is large and the storage capacity per storage medium using a semiconductor memory is small, video information of one story cannot be recorded on one storage medium. Even in a case where video information of one story is recorded over a plurality of storage media, the video information compressed and encoded by the above-described MPEG method is used to compress the video information using the correlation between frames. Because it is encoded, 1
It is difficult to divide an image of one continuous story at an arbitrary position and store it over a plurality of recording media.

[0008] That is, video information compressed and coded by the MPEG system includes an I-picture coded in a frame, a P-picture using forward inter-frame prediction coding,
Since the video information uses a correlation between frames having a B picture using bidirectional inter-frame predictive coding, the video information cannot be reproduced from the B picture in the GOP.

For example, an I picture, a P picture and a B picture are recorded on a first recording medium, and a P picture and a B picture are recorded on a second recording medium.
Like the picture, the first recording medium and the second recording medium
If the stream data of one GOP is recorded over the other, the video information cannot be reproduced from the P picture or the B picture of the second storage medium.

Therefore, according to the present invention, video information compressed and encoded by using intra-frame or inter-frame correlation can be divided into a plurality of portions at arbitrary positions and recorded over a plurality of recording media. It is another object of the present invention to provide a recording medium having a data structure capable of reproducing the video information from a predetermined position, and a reproducing apparatus for reproducing the recording medium.

[0011]

According to the first aspect of the present invention, video information having a plurality of compression-encoded frames using correlation between frames is recorded as stream data, and the stream data is recorded by a playback apparatus. In a recording medium on which is reproduced as video information, information for identifying stream data, information for identifying a file when the stream data is divided into a plurality of files, information on the number of divided files, For identifying whether all the frames necessary for reproducing the stream data of the chapter indicating the predetermined reproduction start point are present in the file, and information for identifying where the stream data to which the chapter belongs is located in the file. And the frame required to play back the stream data to which the chapter belongs. From the address of the frame, the information on the number of frames from the address of the frame until the first frame of the chapter is reproduced, the information on the data amount from the address of the frame to the reproduction of the first frame of the chapter, and from the chapter to the next chapter Information on the playback start time of the data stream, information on the playback time of the data stream to which the chapter belongs,
It is characterized by recording data including information indicating the contents of stream data.

According to a second aspect of the present invention, there is provided a reproducing apparatus for reproducing a recording medium in which video information having a plurality of frames compressed and encoded by using a correlation between frames is recorded as stream data. A drive that reads stream data recorded over a recording medium, an MPEG decoder that decodes stream data output from the drive, a memory that stores stream data, and a CPU that controls reproduction of stream data in the drive ( Central Processing Unit), the CPU decodes data from the first frame of a preset block including a frame in the stream data to which the frame indicating the playback start point belongs, and the chapter is set. Playback from the frame It is characterized by performing control to.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the recording medium of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram for explaining a schematic configuration of one embodiment of the recording medium of the present invention. In FIG. 1, video information (stream data) compressed and encoded by the MPEG method is one continuous video information, and this video information is transferred to a plurality of first recording media, second recording media, and third recording media. This is a case in which the data is divided and recorded on the recording medium of FIG.

Here, the video information compressed and encoded by the MPEG system is obtained by converting the intra-coded frame into an I-frame.
A GOP is composed of one I picture, a plurality of P pictures, and a B picture. Things. Hereinafter, the I picture, the P picture, and the B picture are referred to as frames.

As shown in FIG. 1, when video information of one stream data is recorded over a plurality of recording media, a data block (FILE_HEADER) indicating file information and a stream are stored in the first recording medium. Data block indicating the content of data (CONTENTS_H
EADER) and a data block (CHAPTER_HEAD) indicating an address of each chapter data described later.
ER) and a data block (C
HAPTER_DATA) is recorded.

In the second recording medium and the third recording medium, data blocks (FILE_FILE) indicating file information are stored.
HEADER) and a data block (CHAPTER_HEADER) indicating the address of each chapter data, etc.
And a data block (CHAP) indicating each chapter data
TER_DATA) is recorded.

Next, each data block will be described. To explain the contents of the data block, the first
This will be described using the data structure of the recording medium. FIG. 2 is a schematic diagram for explaining data blocks on the recording medium of the present embodiment. Here, in the description of the data structure described below, video information is recorded on a first recording medium and a second recording medium,
The data block (FILE_) recorded on the first recording medium
HEADER, CONTENTS_HEADER, CH
APTER_HEADER, CHAPTER_DAT
A) is file 1 and data blocks (FILE_HEADER, CHAPTER) recorded on the second recording medium.
_HEADER, CHAPTER_DATA) as file 2.

In FIG. 2, a data block (FILE_HEADER) indicating information of each file is:
It is located at the beginning of each file. "FILE_HA
“EDER” is a value (SIZE_FILE_HEADER) indicating the size of this data block, an identifier (FILE_ID) for identifying a file, and an identifier (C for identifying the contents of stream data in the file).
ONTENTS_ID) and "CONTENTS_I
D ”, the total number of all files (NUM_
FILES) and an identifier (CLOSED_FIL) for identifying whether data necessary to reproduce the frame of the first chapter in the file exists in the file.
E_FLAG) and an address value (STADDR_C) indicating the position information in the file of the data block (CONTENTS_HEADER) indicating the contents of the stream data.
ONTENTS_HEADER) and a data block (CHAPTE_HEADER) indicating position information of each chapter and the like.
R_HEADER) address value (ST)
ADDR_CHAPTER_HEADER).

A data block (CONTENTS_HEADER) indicating the contents of the stream data is arranged following “FILE_HEADER” in at least one of the divided files.
"CONTENTS_HEADER"
NTS_HEADER ”size (SIZE_
CONTENTS_HEADER) and a title character string (TITLE_CONN) unique to the stream data to be divided.
TENTS) and the recorded total playback time (TOTAL)
_PLAYBACK_TIME) and a data block (ALL_CHAPTERS_INF) indicating information unique to each chapter, organized for each chapter.

Further, "ALL_CHAPTERS_IN
F ”is the total number of chapters (NUM_CHAPTERS)
And a data block (CHAP) indicating information of each chapter.
TER_n_INF: n is a chapter number)
“CHAPTER_n_INF” includes a chapter title character string (TITLE) and a playback time (PLAYBAC).
K_TIME) and the reproduction start time (PRESENTAT)
ION_TC) and attribute information (ATTRIBUTE)
S), the number of files to which the chapter belongs (NUM_CHAP)
TER_FILES) and the number of the file belonging to each chapter (FILE_ID).

A data block (CHAPTER_HEADER) indicating the address of each chapter data, etc.
Is "FILE_HEADER" or "CONTEN"
After "TS_HEADER", it is always arranged in each file. “CHAPTER_HEADER” is a value (SIZE_CHAPT) indicating the size of this data block.
ER_HEADER) and an address value (STADDR_CHAPTERS_DAT) indicating the position of the chapter data block “CHAPTER_DATA” in the file.
A) and a value (CHAPTER_NUM_OFFSE) indicating the number of the chapter in the file as an offset value with respect to the chapter number of the first chapter.
T) and a data block (SEARCH_CHAPTER_INF) indicating an address of data necessary for decoding the stream data of each chapter.

Further, "SEARCH_CHAPTER_
INF "indicates the total number of chapters (NUM_CHAPTER).
S) and a data block (CH) indicating information of each chapter.
APTER_n_INF: n is a chapter number), and “CHAPTER_n_INF” is a time code (PRESENTATION_TC) indicating a time at which reproduction (or screen display) of each chapter is started, and the first frame of the chapter is compression-coded by frame correlation. The number of frames (NU) representing the time difference from the immediately preceding intra-frame I picture required for the decoding to the reproduction of the first frame of the chapter.
M_SKIP_FRAMES) and its data amount (SI
ZE_SKIP_FRAMES), a value indicating the number of frames of stream data including all frames belonging to each chapter (FRAMES_CHAPTER), and a value indicating the total data size (SIZE_CHAPT)
ER) and a value (STADDR_CHAP) indicating an address required to decode the first frame of each chapter.
TER).

"CHAPTERS_DATA"
Is a data block (CHAPTER_n_DATA: n) which is arranged following “CHAPTER_HEADER” and indicates all chapter data existing in this file.
Is a chapter number), and are arranged consecutively in the chapter order.

Here, the chapter will be described. The chapter indicates a reproduction start point when performing special reproduction such as cue reproduction. For example, in an optical disc on which music information is recorded, a chapter is added to each song (track) in order to distinguish one song (track), and trick play can be performed using the chapter. Similarly, in video information such as a movie, special reproduction such as chapter search can be performed by adding a chapter to a portion where a scene has changed.

As described above, since the compression-encoded information of the MPEG system or the like compresses and encodes video information by utilizing the correlation between frames, data is read from a P picture or a B picture, and Video information cannot be restored based on the data. Therefore, when reproducing from intermediate video information, information from an I-picture frame is always required, and a chapter used for special reproduction is also added to an I-picture frame encoded in the frame.

When compression-encoded video information such as the MPEG system is stored in a plurality of storage media, one G
Since the OP stream data is recorded and recorded across different storage media, it is difficult to add a chapter only to an I picture and perform special reproduction. For example, when a chapter is assigned to the first storage medium and the chapter is designated during reproduction of the stream data of the second storage medium, the second
Since the specified chapter does not exist on the recording medium, special reproduction cannot be performed.

According to the present invention, such compression-encoded video information can be divided and recorded on a plurality of recording media, and special reproduction can be performed from a position where a chapter is set.

The data structure of the recording medium of this embodiment will be specifically described. A description will be given of a case where stream data having two chapters is recorded as one file, a case where stream data having one chapter is recorded as two files, and a case where stream data having two chapters are recorded as two files. I do. FIG. 3 is a schematic diagram for explaining an array of data to be recorded on the recording medium of the present embodiment. When the compression-encoded video information is decoded, it is displayed in an array as shown in FIG. In FIG. 3A, the chapter 1 is video data (reproduction time “00: 05: 00: 24”) from time code “00: 00: 00: 00” to “00: 05: 00: 25”. Yes, chapter 2
Is the time code "00: 05: 00: 25" to "0
0: 08: 17: 24 ”(reproduction time“ 00: 03: 17: 00 ”).

The video information shown in FIG. 3A is recorded on a recording medium in the data arrangement shown in FIG. FIG.
In (b), the I pictures “I2” to “IBBPB”
BPBB ... ".

Next, a case where stream data having two chapters as shown in FIG. 3 is recorded as one file will be described. That is, this is a case where stream data having two chapters is recorded on one recording medium, and is referred to as “CASE1”.

FIG. 4 is a schematic diagram for explaining a case where stream data having two chapters is recorded as one file on the recording medium of this embodiment. FIG. 5 is a schematic diagram for explaining a data structure in the recording medium of the present embodiment. In FIG. 4A, FIG.
In chapter (b), frames 1 from "B0" to "Bj9" are chapter 1, and chapters from "Bj10" to the last frame are chapter 2. That is, the chapter 1 has the time code “0”.
0: 00: 00: 00 ”to“ 00: 05: 00: 2 ”
5 is video data with a reproduction time of "00: 05: 00: 24". In addition, the chapter 2 has the time code “00: 05: 00: 25” to “00:08:17:
24 is video data with a reproduction time of "00: 03: 17: 00".

In the case of CASE 1 shown in FIG.
The data structure of “_HEADER” is as shown in FIG.
The value “SI” indicating the data amount of “FILE_HEADER”
"ZE_FILE_HEADER" is "a1", "FIL
E_ID is “1”, “CONTENTS_ID” is “ABC1234”, and since there is one file, “NU”
“M_FILES” becomes “1”.

Also, as shown in FIG.
Since the frame “I2” necessary for decoding the first frame “B0” of the file “1” is in the file 1,
In “CLOSED_FILE_FLAG”, “1” indicating that necessary data is present in the file is entered.

Further, as shown in FIG.
The address value “STADDR_CONTENTS_HEADER” indicating the position of “TENTS_HEADER” is “a1”, and the address value “STADDR_CHAPTER_HE” indicating the position of “CHAPTER_HEADER”.
“ADER” becomes “a1 + b1”.

Next, "CONTENTS_HEADE"
As shown in FIG. 5, the data structure of “R” is “b1” for “SIZE_CONTENTS_HEADER” and “CA” for “TITLE_CONTENTS” from FIG.
SE1 ”and“ TOTAL_PLAYBACK_TI
ME "is the total playback time" 00: 08: 17: 24 ".

"NUM_CHARTER" is 2
This is “2” because it has two chapters. "TITLE
_CONTENS ”is“ CHA ”for each chapter.
PTER1 "," CHAPTER2 ", and" PLAT
BACK_TIME ”and“ PRESENTATION_
TC ”is as shown in FIG.

Since the video information is compression-encoded video information according to the MPEG system, "ATTRIBUTES" is replaced with "M
PEG VIDEO STREAM ”, and two chapters are arranged in one file. Therefore, the number of files of each chapter data“ NUM_CHAPTER_F ”
“ILES” is “1”, and “FILE_ID” is “1”.

Next, "CHAPTER_HEADER"
As shown in FIG. 5, the data structure of “SIZE_CHAPTER_HEADER” in FIG.
1 ". Therefore, "STADDR_CHAPTER
“S_DATA” is “a1 + b1 + c1” obtained by adding the size of each piece of header information. "CHAPTER_
"NUM_OFFSET" is an offset value of the chapter number of each chapter, and is set to "0" because there is only one file. Therefore, since this value is “0”, the information of chapter 1 is the block of “CHAPTER — 1_INF”, and the information of chapter 2 is “CHAPTER — 2_IN”.
F ”block.

"NUM_CHARTERS" is
It is "2" because it has two chapters. "CHAP
TER_1_INF ”and“ CHAPTER_1_IN ”
F "," PLAYBACK_TIME "and" PRESE
The values of “NTATION_TC” are as shown in FIG.

In “CHAPTER — 1_INF”, as shown in FIG. 4A, the frame “I2” necessary for decoding the first frame “B0” of chapter 1 is in file 1, so that the display is skipped. "NUM_SKIP_FRAMES" and "SIZE_SKIP_FRAME" indicating the size of the data.
"S" becomes "0".

The number of frames in chapter 1 is "PLA
“9024” frame from “YBACK_TIME”. "SIZE_CHAPTER" indicating the data amount
Is the same as the size from “STADDR_CHAPTER_DATA” to the last data of the “Bj9” frame because the frame that is the boundary of the chapter is a B picture, and is “d1” from FIG. 4B.

Here, a case will be described in which a frame that becomes a chapter boundary is an I picture or a P picture. FIG. 6 is a schematic diagram for explaining a case where the chapter boundary in the recording medium of the present embodiment is a P picture.
In FIG. 6, “Pj”, which is a border frame of a chapter,
B picture “Bj6” and “Bj7” between “8” and the next P picture “Pj11” are bounded by the boundary frame “Pj
8 ”, the frame is displayed before“ Bj ”.
“6” and “Bj7” are frames belonging to chapter 1. Therefore, “SIZE_CHAPT” in chapter 1
The value of “ER” is the amount of data up to frame “Bj7”.

That is, when the boundary frame of a chapter is an I picture or a P picture, the size of the previous chapter is a value including the data amount of the B picture from the boundary frame to the next I picture or P picture. Also, "F
The value of “RAMES_CHAPTER” is also the number of frames including B pictures from the boundary frame to the next I picture or P picture.

The start address "STADDR_CHAPTER" of the data block of chapter 1 is "a1 + b1 + c1" from FIG. 4B.

In the “CHAPTER — 1_INF”, as shown in FIG. 4B, the frame “Ij” necessary for decoding the head frame “Bj10” of the chapter 2
"2" is in file 1, but "Ij2"
"NUM_SK" to skip the display up to j9
“IP_FRAMES” is 10 frames, and “SIZE_SKIP_FRAMES” indicating the size of the data is “dx”. The start address “STADDR_CHAPTER” of the data block of chapter 2 is shown in FIG.
From (b), “a1 + b1 + c1 + d1-dx” is obtained.

Next, in the stream data as shown in FIG. 3, frame 1 from frame "B0" to "Bj9" is file 1, file 2 from frame "Bj10" to the last frame is file 2, and one chapter is divided into two files. In the following, a case in which the data is divided and recorded will be described. That is, 1
This is a case where stream data having two chapters are recorded on different recording media, respectively, and is referred to as “CASE2”. FIG. 7 is a schematic diagram for explaining a case where stream data having one chapter is recorded as two files on the recording medium of the present embodiment. FIG.
FIG. 3 is a schematic diagram for explaining a data structure in the recording medium of the embodiment.

As shown in FIG. 8, the “FILE_HEADER” information of file 1 in CASE 2 is “NU
This is the same as CASE1 described above, except that “M_FILES” is changed to “2”. "CONTENTS_HE
The "ADER" information divides the chapter into two files, so "NUM_CHAPTER_FILES"
Becomes “2”, and “FILE” of file 1 and file 2
_ID ”is continuously recorded. "CHAPTER_HEA
The “DER” information has a value as shown in FIG. 8 because there is one chapter.

In the file 2, "FILE_HEAD"
The “ER” information is as shown in FIG. Since the chapter data of file 2 is always reproduced after file 1, "CLOSED_FILE_FLAG" may be either "0" or "1". Here, it is set to “0”. Since “CONTENTS_HEADER” already exists in file 1, file 2 is omitted. Therefore, the start address “STADDR_CONTENTS_HEA” of the “CONTENTS_HEADER” information
“DER” is “0”. "CHAPTER_HEAD
ER "start address" STADDR_CHAPT "
“ER_HEADER” is “a2” from FIG. 7B.

File 2 "CHAPTER_HEAD"
In the “ER” information, “SIZE_CH” from FIG.
"APTER_HEADER" is "c2", "CHAPT"
ERS_DATA "start address" STADDR
“_CHAPTERS_DATA” is “a2 + c2”. Other information of “CHAPTER_HEADER” records the same value as file 1 because there is one chapter.

Next, in the stream data as shown in FIG. 3, the frames “B0” to “Bj9” are chapter 1, the frame “Bj10” to the last frame are chapter 2, and the two chapters are divided into two files. In the following, a case in which the data is divided and recorded will be described. That is, 2
This is a case where stream data having two chapters is recorded on different recording media, and is referred to as “CASE3”. FIG. 9 is a schematic diagram for explaining a case where stream data having two chapters is recorded as two files on the recording medium of the present embodiment. FIG.
FIG. 3 is a schematic diagram for explaining a data structure in the recording medium of the present embodiment.

As shown in FIG. 10, "FI"
"LE_HEADER" is the same as CASE2. "CONTENTS_HEADER" of file 1 is
"FILE_ID_" of "CHAPTER_2_INF"
It is the same as CASE1 except that the value of “1” is “2”. "CHAPTER_HEADER" in file 1
Is the same as “CHAPTER_1_INF” of CASE1 except that the value of “NUM_CHAPTERS” is “1”.

[FILE_HEADER] of file 2
Is the same as “FILE_HEADER” of CASE2. However, "CLOAED_FILE_FLAG"
Must be set to “0” because the frame “Ij2” necessary for decoding the first frame “Bj10” of chapter 2 exists in the file 1.

Also, since file 1 has chapter 1, “CHAPTER_NUM_OFFS” in file 2
“ET” becomes “1”. That is, it indicates that the information of chapter 2 is in the data block of “CHAPTER — 1_INF”. Also, the frames “Ij2” to “Bj
9 to skip the display up to “NUM_SK”.
“IP_FRAMES” is 10 frames, and “SIZE_SKIP_FRAMES” indicating the size of the data is “dx”.

The first frame "Bj1" of chapter 2
The frame “Ij2” necessary for decoding “0” is shown in FIG.
From (b), the address of file 1 “a1 + b1 + c1
+ D1−dx ”, the start address“ STADDR_CHAPTER ”of the data block of chapter 2
Is “a1 + b1 + c1 + d1-dx”. That is, “STADDR_CHA” of the first chapter of the file in which “CLOSED_FILE_FLAG” is “0”
“PTER” indicates the address in the previous file.

Next, a reproducing apparatus for reproducing the stream data recorded in the above-mentioned CASE1, CASE2 and CASE3 will be described. FIG. 11 is a schematic diagram showing a schematic configuration of an embodiment of the reproducing apparatus of the present invention. FIG.
1, the playback apparatus 1 includes an input controller 2, a memory 3, a drive 4, a CPU 5, an MPEG decoder 6, and a display controller 7. These are respectively connected by a bus 8, and data transfer is performed via the bus 8.

In FIG. 11, the input controller 2
An input from a user such as a keyboard 9 and a mouse 10 is taken into the bus 8. The memory 3 stores work and temporary data such as a reproduction program. Drive 4
A storage medium capable of managing data blocks as files by a file management program (hereinafter referred to as OS). For example, a PC (Personal Compute)
r) Drive devices such as cards and RAM (Random Access Memory) cards. CPU (Central Processing
Unit) 5 is a controller that executes a stream data reproduction program, performs data transfer, and arbitrates the bus, and executes a user input / output and an OS. The MPEG decoder 6 receives the stream data read from the drive 4 by the CPU 5 via the bus 8 and displays the decoded frame on the monitor 11. The display controller 7 displays an input request to the user, a current system state, and the like on the display 12.

Next, a reproducing operation in the reproducing apparatus of the present embodiment will be described. FIG. 12 is a flowchart showing a process until the reproduction of the stream data is started in the reproduction device of the present embodiment. In the figure, steps are described as “S”. As shown in FIG. 12, in step 1, all drives 4 connected to the playback device 1 are searched, and a list of valid drives 4 connected to the playback device 1 (hereinafter a drive list and Is temporarily created in the memory 3. In step 2, it is determined whether a file to be reproduced has been searched from all the drives in the drive list created in step 1. In the first time, the determination is always false, and the process proceeds to step 3.

In step 3, the drive 4 for searching for a file to be reproduced is selected in the order of the drive list, and a file search is started. In step 4, it is determined whether or not the target file has been found, and if found, the process proceeds to step 5. If not found, return to step 2 to continue the file search. Here, for the target file, for example, a predetermined extension may be added to the file name, and a file having this extension may be searched for.

Next, in step 5, the found file is opened and “FILE_HE” located at the top of the file is opened.
ADER "information is stored in the memory 3. In step 6, it is determined whether the file is found first, and if true, the process proceeds to step 7. In step 7, "FILE_HEA
A list of the location of the file found as “FILE_ID” of the DER information, ie, a drive 4 and a file name (hereinafter referred to as a file name list) is created in the memory 3. This file name list is based on “FILE_ID”
You can select the file name of the corresponding file. Here, “FILE_ID” indicates the order of division of the file, that is, the order of reproduction.

In step 8, the file name of the found file is registered in the file name list created in step 7. In step 9, "FIL" of the found file
"CONTENTS_H" following the "E_HEADER" information
EADER "information is determined, and if true, the process proceeds to step 10, and the" CONTENTS_HEADER "
The information is stored in the memory 3.

In step 11, the opened file is closed, and the process returns to step 4. In step 4, it is determined whether the target file still exists in the selected drive 4,
If true (file found), go to step 5.
If false (not found), step 2
Then, it is determined whether there is an unsearched drive 4 in the drive list. If true (the unsearched drive is present), the process proceeds to step 3 to select the next drive 4 and continue the file search.

In step 6, if false (not the first file found), the process proceeds to step 12, and in step 12, the previously stored “FILE_HEADE”
R ”information“ CONTENTS_ID ”and“ CONTENTS_ID ”of the current file are compared, and true (“ CO
If the “NTENTS_ID” is the same, the process proceeds to step 8 to additionally register in the file name list. False ("CONT
If the “ENTS_ID” is different), it is determined that this file is another stream data file, and the process proceeds to step 11 to search another file again.

If it is determined in step 2 that the data is true (all drives 4 have been searched), the process proceeds to step 13, and the “NULL” of the “FILE_HEADER” information stored in step 5 is read.
The value of “M_FILES” is compared with the number of registrations in the file name list created in steps 7 and 8. "NUM_FI
If the number of registrations matches "LES", it is determined that all files have been found, and the process proceeds to step 14. If false (the file is insufficient), the error processing in step 16 is executed and the processing is terminated. The error processing in step 16 is, for example,
A message such as a lack of files is displayed on the display 12, and the playback device 1 is reinitialized.

In step 14, in step 9, "CON
It is determined whether at least one "TENTS_HEADER" information has been found. "CONTENTS_HEADE
If there is no “R” information, it means that, for example, the file has been damaged or an incorrect file has been searched, so the error processing of step 16 is executed. In step 15, the “CONTENTS” stored in step 9
From the “_HEADER” information and the file name lists created in steps 7 and 8, a file name list belonging to each chapter (hereinafter referred to as a chapter file list) is created in the memory 3. The chapter file list is, for example,
It consists of a chapter number and a file name, and the file name of a required file can be selected from the chapter number.

FIG. 13 is a flowchart showing a case where all the chapters are continuously reproduced from the first chapter in the reproducing apparatus of this embodiment. In the figure, steps are described as “S”. As shown in FIG. 13, in step 17, all files registered in the file name list created in steps 7 and 8 in FIG. 12 are opened. In step 18, the video output of the MPEG decoder 6 is made valid. In step 19, it is determined whether all the files registered in the file name list have been reproduced.

In step 20, files are selected in the order of “FILE_ID” in the file name list,
In step 1, “CHAPTER_HEADER” information is temporarily stored in the memory 3. In step 22, "CH
"STADDR_C" of "APTER_HEADER" information
The read start address in the file, that is, the file pointer is moved to the value indicated by "HAPTERS_DATA", and in step 23, the stream data is continuously read from the position of the moved file pointer.

In step 24, the read stream data is sent to the MPEG decoder 6 via the bus 8 and decoded, and then the video data is output to the monitor 11.
Will be displayed. In step 25, it is determined whether the file has been read to the end of the file, that is, whether the file pointer points to the end of the file. If false (not yet reached the end of the file), return to step 23.

If all the files registered in the file name list have been reproduced in step 19, the flow advances to step 26 to invalidate the video output of the MPEG decoder 6. Finally, in step 27, all open files are closed.

FIG. 14 is a flowchart showing a case where the reproduction apparatus of the present embodiment reproduces from the selected chapter. In the figure, steps are described as “S”.
As shown in FIG. 14, in step 28, the first file corresponding to the target chapter is selected and opened from the chapter file list created in step 15 of FIG.
In step 29, the "CHAPTER"
_HEADER ”information is temporarily stored in the memory 3.

In step 30, it is determined whether the target chapter is the first chapter of the file. If true (the first chapter), "FILE_FILE"
“CLOSED_FILE_FL” of “HEADER” information
AG ”is 1. If true, it means that the stream data needed to play this chapter is in this file, ie
“STADD” of “CHAPTER_HEADER” information
Since it is known that the file should be reproduced from the file address indicated by the value of “R_CHAPTERS_DATA”, the file pointer is set to “STADDER_DATA” in step 32.
Move to the value of “CHAPTERS_DATA”.

In step 33, the video output of the MPEG decoder 6 is made valid, and in step 34, stream data is continuously read from the position of the file pointer. In step 35, the read stream data is sent to the MPEG decoder 6 via the bus 8 and decoded, and then displayed on the monitor 11 by video output.

At step 36, the total amount of the read stream data is “SIZE_CHAP” indicating the size of the chapter data of the “CHAPTER_HEADER” information.
TER ”is determined. If they match, all the stream data of the chapter has been reproduced, so that the video output of the MPEG decoder 6 is invalidated (step 37), all the files are closed (step 38), and the processing ends. In step 36, if false (not all stream data is reproduced), step 3
Go to 9.

In step 39, it is determined whether the file has been read to the end of the file, that is, whether the file pointer points to the end of the file. If true (the end of the file), the process proceeds to step 40. If false (the end of the file has not been reached), return to step 34. Step 4
0, the next file in the file name list is newly selected and opened, and “CHAPTER_HEA” of the opened file is opened.
DER "information is temporarily stored in the memory 3, and
Return to 2.

At step 30, when the target chapter is not the first chapter of the file, the file pointer is set to "STAP" of the "CHAPTER_HEADER" information.
Move to the value of “ADDR_CHAPTER” (step 4
3) Go to step 44. In step 44, stream data is read continuously from the position of the file pointer, and the read stream data is sent to the MPEG decoder 6 via the bus 8 and decoded (step 45).
Is done. However, the video output is not displayed on the monitor 11 because it has not been enabled yet.

In step 46, the total amount of the read stream data is "CHAPTER_HEADER".
It is determined whether the information matches “SIZE_SKIP_FRAMES”. When the first frame of a chapter is compression-coded due to inter-frame correlation, in order to decode the first frame, it is necessary to sequentially decode from the I picture coded in the immediately preceding frame to the immediately preceding reference frame. Must. This "SIZE_
“SKIP_FRAMES” indicates the amount of data between the immediately preceding intra-coded I picture and the first frame of the chapter necessary for the decoding. Therefore, by disabling the video output of the MPEG decoder 6 until the value indicated by “SIZE_SKIP_FRAMES”, the display can be started from the first frame of the chapter.

In step 46, if false, the process returns to step 44, and if true, the process proceeds to step 47. Step 4
In step 7, it is determined whether the target chapter is the first chapter of the file.
“STADDR_CHA” of “TER_HEADER” information
PTERS_DATA ”(step 32).
If false, enable the video output of the decoder (step 3
3) Perform as described above.

In step 31, "FILE_HE"
ADER ”information“ CLOSED_FILE_FLA ”
If "G" is not 1, the process proceeds to step 42, where "FILE_I" of the current file selected in step 28 is selected from the file name list created in steps 7 and 8 in FIG.
Select and open the file with the previous value of "D". The target chapter is at the beginning of the file, and
When “CLOSED_FILE_FLAG” is 0, it means that the data of the reference frame necessary for decoding the first frame of the chapter exists in the previous file. Thereafter, step 43 and subsequent steps are executed as described above.

Next, CASE1, CASE2 and CAS
The reproduction procedure in each case of E3 will be described. Here, the identification names of the drive 4 in FIG.
The file name of ASE1 is "sample1.vbs",
Rename the two file names CASE2 and CASE3 to "sa
mple1. vbs "and" sample2.vbs ". The drive 4 has an extension “.
No other file has "vbs".

When a search for the drive 4 is specified by the keyboard 9 in FIG. 11, the CPU 2 starts searching for a file to be reproduced according to the procedure shown in FIG. C
In the case of ASE1, in step 1 of FIG. 12, since the drive of the playback apparatus 1 is only the drive 4, a drive list having the identification name “A” of the drive 4 is created. In step 2, since the search is still the first time, the process proceeds to step 3. In step 3, drive 4 is searched in the order of the drive list.
Is selected, that is, the drive 4 having the drive identifier “A” is selected.
For files having the file name extension ".vbs".

The file “sample” is stored in the drive 4.
1. When “vbs” is found, the process proceeds to step 5, where “SIZE_FILE_HEADER” (value = a1) is read from the start address of the file “sample1.vbs” and stored in the memory 3. In step 6, since the file is found first, a file name list is created in the memory 3 (step 7), and “FILE_ID” (value = 1) and the file name “samp” are added to this file list.
le1. vbs ". The file "sample
1. vbs "contains" CONTENTS_HEADE "
R ”information, so“ CONTENTS_HEADE ”
R ”information is stored in the memory 3. Since the necessary information has been read, the file "sample1.vbs" is closed (step 11), and the process returns to step 4.

The drive 4 has a file name extension ".vb".
Since no other file has "s", the process returns to step 2. Since there is only one drive 4, the process proceeds to step 13, where the number of found files 1 and “NUM_FILES”
(Value = 1), and since they match, the process proceeds to step 14. In step 9, “CONTENTS_HEADE
R ”information has been obtained, so the file name list in steps 7 and 8 and“ CONTENTS_HEADER ”
A chapter file list is created in the memory 3 from the information of each chapter (chapter 1 and chapter 2) of the information (step 15), and the process is terminated.

Next, a case where the chapters of CASE 1 are continuously reproduced will be described with reference to FIG. When continuous playback is designated by the keyboard 9 in FIG.
Starts playback according to the procedure shown in FIG. First, the files registered in the file list created in steps 7 and 8 in FIG.
le1. vbs ”(step 17), MP
Enable the video output of the EG decoder 6 (Step 1)
8).

Since this is the first time, the process directly proceeds to step 20, and selects the file whose “FILE_ID” in the file list is 1, here, the file “sample1.vbs”, and selects “FI_1” stored in the memory 3 in step 5 in FIG.
“STADDR_CHAP” of “LE_HEADER” information
From the address indicated by the value of “TER_HEADER”, “C
"SIZE_CH" of "HAPTER_HEADER" information
Only “APTER_HEADER” (value = c1) is read out and temporarily stored in the memory 3 (step 21). "ST" of the stored "CHAPTER_HEADER" information
“ADDR_CHAPTERS_DATA” (value = a1 +
The file pointer is moved to the address indicated by (b1 + c1) (step 22), the stream data is read continuously from this address (step 23), and the read stream data is sent to the MPEG decoder 6.

The MPEG decoder 6 sequentially decodes the transmitted stream data and displays it on the monitor 11 because the video output is valid. Then, the file "sa
mple1. vbs ”until the end
Repeat steps 3 and 24. When the end of the file is reached, the process returns to step 19, and since there is only one file, the process directly proceeds to step 26. In step 26, MP
Invalidates the video output of the EG decoder 6 (step 2
6) Close the file "sample1.vbs" (step 28) and end the reproduction.

In the case of CASE2 and CASE3, there are two files, and there is no difference in the processing procedure except that the file search loop of step 4 in FIG. 12 and the loop of step 19 in FIG. 13 are executed twice. Therefore, the description is omitted.

Next, a reproduction procedure for each chapter in CASE 1 will be described. When the playback of chapter 1 is designated by the keyboard 9 in FIG. 11, the CPU 2 starts the playback according to the procedure shown in FIG. First, the file registered in the chapter file list created in step 15 in FIG. 12, here, the file “sample1.v
"bs" (step 28), and the memory 3
"STA" of "FILE_HEADER" information stored in
From the address indicated by the value of “DDR_CHAPTER_HEADER”, “CHAPTER_HEADER” information is converted to “SIZE_CHAPTER_HEADER” (value = c
Only 1) is read out and temporarily stored in the memory 3 (step 29).

The chapter 1 stores the file “sample1.
vbs ”(step 3
0), “CLOSE” of “FILE_HEADER” information
D_FILE_FLAG "is checked (step 31).
Since “CLOSED_FILE_FLAG” is 1, the file pointer is set to “STADDR_CHAPTERS_DATA” of “CHAPTER_HEADER” information.
(Value = a1 + b1c1) (step 32), and M
The video output of the PEG decoder 6 is made effective (step 33).

Then, stream data is read continuously from this address (step 34), and the read stream data is sent to the MPEG decoder 6. MPEG
The decoder 6 sequentially decodes the transmitted stream data and displays it on the monitor 11 because the video output is valid. Then, the total amount of the read stream data is
“SIZE_” of “CHAPTER_HEADER” information
(Step 36). If they do not match, it is determined whether the end of the file has been reached (step 39). If not, the process returns to step 34. "SIZE_CHA
After reading out only the data of "PTER", the video output of the MPEG decoder 6 is invalidated (step 37), and the file "sample1.vbs" is closed (step 3).
8) Terminate the reproduction.

When the reproduction of the chapter 2 is designated by the keyboard 9 in FIG. 11, the CPU 5 starts the reproduction according to the procedure shown in FIG. The processing up to step 29 is the same as that for chapter 1. In step 30, since chapter 2 is not the beginning chapter of the file, the flow advances to step 43, and the file pointer is set to "CHA".
“STADDR_CH” of “PTER_HEADER” information
APTER "(step 43), and stream data is continuously read from this address (step 4).
4) Send the read stream data to the MPEG decoder 6.

The MPEG decoder 6 sequentially decodes the transmitted stream data, but does not display it on the monitor 11 because the video output is not yet valid. Then, the total amount of the read stream data is "CHA
"SIZE_SKIP" of "PTER_HEADER" information
_FRAMES ”(value = dx) is determined (step 46). If not, the process returns to step 44. If they match, the process proceeds to step 47.

Since chapter 2 is not the beginning chapter of the file, the video output of the MPEG decoder 6 is enabled (step 33), and the total amount of the read stream data is changed to “SIZER_HEADER” information “SIZ
Steps 34 and subsequent steps are executed until the value matches "E_CHAPTER" (value = d2), and the reproduction ends.

Next, the procedure for reproducing chapter 1 in CASE 2 will be described. When the playback of the chapter 1 is designated by the keyboard 9 in FIG. 11, the CPU 5 starts the playback according to the procedure shown in FIG. First, two files “sample1.vbs” registered in the chapter file list created in step 15 of FIG.
First, among the “sample2.vbs”, the file “sample1.vbs” is opened (step 28),
“FILE_HEAD” stored in the memory 3 in step 5
“STADDR_CHAPTER_HEA” of “ER” information
From the address indicated by “DER” (value = a1 + b1), “C
HAPTER_HEADER ”information to“ SIZE_CH
Only “APTER_HEADER” (value = c1) is read out and temporarily stored in the memory 3 (step 29).

The chapter 1 stores the file “sample1.
vbs ”(step 3
0), “CLOSE” of “FILE_HEADER” information
_FILE_FLAG ”is checked (step 31).
Since “CLOSE_FILE_FLAG” is 1, the file pointer is moved to “STADDR_CHAPTERS_DATA” (value = a1 + b1 + c1) of “CHAPTER_HEADER” information (step 32), and MP
Enable the video output of the EG decoder 6 (step 3
3).

Then, stream data is continuously read from this address (step 34), and the read stream data is sent to the MPEG decoder 6. MPEG
The decoder 6 sequentially decodes the transmitted stream data and displays it on the monitor 11 because the video output is valid. Then, the total amount of the read stream data is
“SIZE_” of “CHAPTER_HEADER” information
CHAPTER ”(value = d1 + d2) is determined (step 36). Here, since they do not match, it is determined whether the end of the file has been reached (step 39).

If it has not reached the end, step 34
Return to If the end of the file has been reached, open the next file “sample2.vbs” (step 4
0), “FI” stored in the memory 3 in step 5 of FIG.
“STADDR_CHAP” of “LE_HEADER” information
From the address indicated by “TER_HEADER” (value = a2), “CHAPTER_HEADER” is changed to “SIZE_
Only “CHAPTER_HEADER” (value = c2) is read and temporarily stored in the memory 3 (step 41).

Then, returning to step 32, the file pointer is set to “SAP” of “CHAPTER_HEADER” information.
TADDR_CHAPTERS_DATA ”(value = a2
+ C2) (step 32) and execute the next step. Finally, since the total amount of the read stream data matches “SIZE_CHAPTER” (value = d1 + d2) of the “CHAPTER_HEADER” information, step 36 is true, and the video output of the MPEG decoder 6 is invalidated (step 37). ), Files “sample1.vbs” and “sample2.vbs”
vbs ”to end the reproduction.

Next, the procedure for reproducing chapter 1 in CASE 3 will be described. When the playback of the chapter 1 is designated by the keyboard 9 in FIG. 11, the CPU 5 starts the playback according to the procedure shown in FIG. The two files “sample1.vbs” and “sa” registered in the chapter file list created in step 15 of FIG.
mple2. vbs ", first, the file" sam
ple1. vbs "(step 28), and" STADDR_CHAPTER_HEADER "of the" FILE_HEADER "information stored in the memory 3 in step 5.
From the address indicated by (value = a1 + b1), “CHAPT
ER_HEADER ”information to“ SIZE_CHAPTE
R_HEADER ”(value = c1) and temporarily store it in the memory 3 (step 29).

The chapter 1 stores the file “sample1.
vbs ”(step 3
0), “CLOSE” of “FILE_HEADER” information
D_FILE_FLAG "is checked (step 31).
Since “CLOSED_FILE_FLAG” is 1, the file pointer is set to “STADDR_CHAPTERS_DATA” of “CHAPTER_HEADER” information.
(Value = a1 + b1 + c1) (step 32),
The video output of the MPEG decoder 6 is enabled (step 33). Then, stream data is read continuously from this address (step 34), and the read stream data is sent to the MPEG decoder 6.

The MPEG decoder 6 sequentially decodes the transmitted stream data and displays it on the monitor 11 because the video output is valid. Then, the total amount of the read stream data is “CHAPTER_HEADER”.
It is determined whether the information matches “SIZE_CHAPTER” (value = d1) (step 36). If they do not match, it is determined whether the file has reached the end (step 39). If it has not reached the end, the process returns to step 34.

Here, from FIG. 9B, the last frame “Pj11” of chapter 1 is stored in the file “sample”.
1. vbs ", the process does not proceed to step 40. Finally, the total amount of the read stream data is equal to “SIAP_HEADER” information “SI
ZE_CHAPTER ”(value = d1),
Step 36 becomes true, and the video output of the MPEG decoder 6 is invalidated (step 37), and the file "sam
ple1. vbs ”to end the reproduction.

Next, the procedure for reproducing chapter 2 in CASE 3 will be described. When the reproduction of the chapter 2 is designated by the keyboard 9 in FIG. 11, the CPU 5 starts the reproduction according to the procedure shown in FIG. The two files “sample1.vbs” and “sa” registered in the chapter file list created in step 15 of FIG.
mple2. vbs ", first, the file" sam
ple2. vbs "(step 28), and" STADDR_CHAPTER_HEADER "of the" FILE_HEADER "information stored in the memory 3 in step 5.
From the address indicated by (value = a2), “CHAPTER_
HEADER ”information to“ SIZE_CHAPTER_H
EADER "(value = c2) and temporarily store it in the memory 3 (step 29).

The chapter 2 stores the file “sample2.
vbs ”(step 3
0), “CLOSE” of “FILE_HEADER” information
D_FILE_FLAG "is checked (step 31).
Since “CLOSED_FILE_FLAG” is 0, the previous “FILE_ID” from the chapter file list
Is opened (step 42).

Then, the file “sample1.vb”
s "file pointer to" CHAPTER_HEAD "
ER ”information“ STADDR_CHAPTER ”(value =
a1 + b1 + c1 + d1 + dx) (Step 4)
3) The stream data is read continuously from this address (step 44), and the read stream data is sent to the MPEG decoder 6. The MPEG decoder 6
The incoming stream data is decoded sequentially,
Since the video output is not yet effective, it is not displayed on the monitor 11.

Then, the total amount of the read stream data is equal to the “SI_HEADER” information “SI
ZE_SKIP_FRAMES ”(value = dx) is determined (step 46). If they do not match, the process returns to step 44. Chapter 2 is the file "sample2.vbs"
Is the first chapter of the file "sample"
2. vbs ”to“ CHAPTER_
"STADDR_CHAPTER" of "HEADER" information
"S_DATA" (value = a2 + c2) (step 32), and the video output of the MPEG decoder 6 is enabled (step 33).

Finally, since the total amount of the read stream data coincides with “SIZE_CHAPTER” (value = d2) of the “CHAPTER_HEADER” information, step 36 becomes true and the MPEG decoder 6
Is invalidated (step 37), and the files “sample1.vbs” and “sample2.vb”
s "to end the reproduction.

As described above, video information compressed and encoded by using intra-frame or inter-frame correlation is divided into a plurality of files at arbitrary positions and recorded over a plurality of recording media. Can be. Also, the video information can be reproduced from a preset position.

Further, in the above-described embodiment, "CONTE
The title, the reproduction time, the reproduction start time, and the attribute information are recorded in the “NTS_HEADER” information. However, in addition to the above, the data block may describe the contents such as the copyright owner name and the production date. In this embodiment, only the MPEG video stream is handled. However, the present invention can be easily applied to an MPEG1 system stream or an MPEG2 program stream in which an audio stream is multiplexed.

[0108]

According to the present invention, even if a single piece of continuous video information is compression-encoded using the correlation between frames such as the MPEG system, it is divided into a plurality of files at an arbitrary position. Thus, recording can be performed over a plurality of recording media, and the video information can be reproduced. It is also possible to set a chapter serving as a reproduction start point of special reproduction or the like at an arbitrary position, and perform special reproduction of video information recorded over a plurality of recording media using the chapter. .

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining a schematic configuration of an embodiment in a recording medium of the present invention.

FIG. 2 is a schematic diagram illustrating a data block on a recording medium according to the present embodiment.

FIG. 3 is a schematic diagram for explaining an array of data to be recorded on a recording medium according to the embodiment.

FIG. 4 is a schematic diagram for explaining a case where stream data having two chapters is recorded as one file on the recording medium of the present embodiment.

FIG. 5 is a schematic diagram for explaining a data structure in the recording medium of the embodiment.

FIG. 6 is a schematic diagram for explaining a case where a chapter boundary in the recording medium of the present embodiment is a P picture.

FIG. 7 is a schematic diagram illustrating a case where stream data having one chapter is recorded as two files in the recording medium of the present embodiment.

FIG. 8 is a schematic diagram for explaining a data structure in the recording medium of the present embodiment.

FIG. 9 is a schematic diagram for explaining a case where stream data having two chapters is recorded as two files on the recording medium of the present embodiment.

FIG. 10 is a schematic diagram for explaining a data structure in the recording medium of the present embodiment.

FIG. 11 is a schematic diagram showing a schematic configuration of an embodiment of the reproducing apparatus of the present invention.

FIG. 12 is a flowchart showing a process until playback of stream data is started in the playback device of the present embodiment.

FIG. 13 is a flowchart showing a case where all the chapters are continuously reproduced from the first chapter in the reproducing apparatus of the present embodiment.

FIG. 14 is a flowchart illustrating a case where reproduction is performed from a selected chapter in the reproduction device of the present embodiment.

[Explanation of symbols]

1. playback device, 2. input controller, 3. memory, 4. drive, 5. CPU, 6. MPEG decoder, 7. display controller, 8. bus, 9. keyboard, 10. ..Mouse, 11 monitor, 12 display

Claims (2)

[Claims] 1. A recording medium in which video information including a plurality of frames compressed and encoded by using a correlation between frames is recorded as stream data, and the stream data is reproduced as video information by a reproducing apparatus. , Information for identifying a file when the stream data is divided into a plurality of files, information on the number of divided files, and a chapter indicating a first predetermined reproduction start point of the file. Information identifying whether all the frames necessary for reproducing the stream data of the file exist in the file, information identifying where the stream data to which the chapter belongs in the file, and information to which the chapter belongs Information on the address of the frame required to play back the stream data Information on the number of frames from the address of the frame until the chapter leading frame is reproduced, information on the data amount from the address of the frame until the beginning frame of the chapter is reproduced, and A recording medium recording data including information on a reproduction start time up to a chapter, information on a reproduction time of a data stream to which the chapter belongs, and information indicating the content of the stream data. 2. A reproducing apparatus for reproducing a recording medium in which video information having a plurality of frames compressed and encoded by using a correlation between frames is recorded as stream data.
A drive that reads the stream data recorded over a plurality of recording media; an MPEG decoder that decodes the stream data output from the drive; a memory that stores the stream data; A CPU (Central Processing Unit) for controlling the reproduction of the trimming data, wherein the CPU includes a first block of a preset block including the frame in the stream data to which the frame in which the chapter indicating the reproduction start point belongs belongs. A playback device that decodes data from a frame and performs control to start playback as the video information from the frame in which the chapter is set.