JP3392838B2 - Optical disc, reproducing apparatus and method therefor, and recording method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium, an information recording / reproducing apparatus and a method, and more particularly to a reproducible reproducing DVD player, a recording / reproducing DVD player and a technique applicable to these DVD players. Is.

[0002]

2. Description of the Related Art In recent years, a system for reproducing an optical disc on which video (moving image) and audio is recorded has been developed, and movie software, karaoke, etc. such as LD (laser disc) or video CD (video compact disc) can be produced. It is widely used for the purpose of reproduction.

MP standardized internationally as a moving image compression method
EG2 (Moving Image coding Expert Group) system is adopted, and AC3 is used as an audio coding mode.
The DVD standard that adopted the audio compression method was proposed,
An optical disc already based on the standard (hereinafter simply referred to as a DVD
It is called a disc. ) Is sold, and its playback device is also popular.

According to the MPEG2 system layer, the standard of DVD video (DVD-ROM) is MPEG2 as a moving picture compression system and linear PC as an audio recording system.
In addition to M, it supports AC3 audio and MPEG audio. Furthermore, this DVD video standard
The sub-picture data is run-length-compressed bitmap data for subtitles, and control data (navigation data) for reproduction control such as fast-forward / rewind data search is added. In addition, this standard requires ISO96 so that data can be read by a computer.
It also supports 60 and UDF bridge formats.

In this DVD standard, a moving picture compression method in accordance with the system layer of MPEG2 is adopted, AC3 audio or MPEG audio is supported as an audio coding mode, and bit map data is run-length for subtitles. It has a data structure including a sub-picture pack in which compressed sub-picture data is independently stored, and a navigation pack in which control data for special reproduction such as fast-forward / rewind is also independently stored. In addition, in this DVD standard, ISO9
It supports 660 and Micro UDF.

At present, such a DVD standard is
It is defined as a read-only format, and is not defined so that it can be applied to an optical disk for recording / playback that can be recorded and played in a general home and its player. Therefore,
It has been found that the following problems occur when an ordinary home recording / reproducing apparatus is constructed based on the DVD standard.
Normally, a DVD-Video player for reproduction only has a continuous reproduction function that allows the reproduction to be temporarily interrupted during the reproduction and then to continue the reproduction from the position where the reproduction is interrupted. More specifically, this continuous reproduction function, when the reproduction is interrupted in the middle of the inserted disc, provides the RA information in the player with the information on the location of the portion that has been reproduced so far.
It is stored in M and the information of the location is accessed, and, for example, by pressing the continue playback key or by pressing the play key once, the data of the location previously played is read from the memory, and then , Resumes playback from the continuation of playback,
Alternatively, the play key is pressed again to resume normal reproduction.

[0007]

In the continuous playback function of the currently used read-only DVD video player, when the disc is taken out, the playback end information of the disc disappears, and even if the same disc is inserted again, There is a problem that the reproduction cannot be resumed from the position where the reproduction is stopped on the disc, and the user must find the reproduction position by himself. In the DVD-Video player for reproduction only according to the latest model, an EE-ROM is used as a memory for storing the reproduction end information, and the information is stored for each disc (for example, the reproduction end information for a maximum of 10 discs is stored). It can be saved.) Even if the disc is replaced, the playback location can be searched.

However, by adopting the method of storing the reproduction end information, the capacity of the memory that can be stored is limited, and it is expected that it will not be possible if the disks are exchanged indefinitely.

In the DVD player system, when the disc is taken out, the reproduction end information of the disc disappears.
Even if the same disc is inserted, there is a problem that the user has to find out how to restart the playback from the place where the playback was interrupted before.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a disc and an information recording / reproducing apparatus and method capable of continuously reproducing even if the disc is taken out from the recording apparatus. I am trying.

[0011]

According to the present invention, there is provided a data area for recording a video object including a video pack storing video data and an audio pack storing audio data, and a picture object including a still image, and In an optical disc having a control information area for recording control information for managing data of a video object and a picture object, the video object is a set of a plurality of video object units, and each video object unit has a plurality of the aforementioned A video pack and an audio pack are mixed, and the control information includes a plurality of program chain information,
Each program chain information includes a plurality of cell reproduction information, each cell reproduction information specifies a reproduction range in the video object, the program chain information manages cell reproduction information four reproduction order, and further, The control information includes a first control information block at the beginning and a second control information block that manages a picture object including a still image arranged at a subsequent stage of the block, and the first control information at the beginning is included. In the control block, the number of the program chain that manages the portion in which the representative image of the video object is recorded is described. Furthermore, in the first control information block at the beginning, reproduction interruption information is recorded. This reproduction interruption information is included and is specified by the program to be specified as information for starting the next reproduction when the reproduction of the video object is interrupted. Ram chain number, the optical disk that contains the identification information of a cell in which a basic.

[0012]

DETAILED DESCRIPTION OF THE INVENTION A digital information recording / reproducing system according to an embodiment of the present invention will be described below with reference to the drawings.

As a typical embodiment of the digital information recording / reproducing system according to the present invention, there is an apparatus for recording / reproducing a moving image encoded based on MPEG2 at a variable bit rate, for example, a DVD digital video recorder.

FIG. 1 is a perspective view illustrating the structure of a recordable optical disc 10 used in the DVD digital video recorder.

As shown in FIG. 1, this optical disk 10
Is a pair of transparent substrates 1 each provided with a recording layer 17.
4 has a structure in which the adhesive layers 20 are bonded together. Each board 14
Can be made of polycarbonate having a thickness of 0.6 mm, and the adhesive layer 20 can be made of an ultrathin (for example, 40 μm thick) ultraviolet curable resin. These pair of 0.
By laminating the 6 mm substrate 14 so that the recording layer 17 is in contact with the surface of the adhesive layer 20, the large-capacity optical disk 10 having a thickness of 1.2 mm is obtained.

A center hole 22 is provided in the optical disk 10, and a clamp area 24 for clamping the optical disk 10 during rotational driving is provided around the center hole 22 on both sides of the disk. A spindle of a disc motor is inserted into the center hole 22 when the optical disc 10 is loaded in a disc drive device (not shown).
Then, the optical disc 10 is clamped in the clamp area 24 by a disc clamper (not shown) while the disc is rotating.

The optical disk 10 has, around the clamp area 24, an information area 25 in which video data, audio data and other information can be recorded.

A lead-out area 26 is provided on the outer peripheral side of the information area 25. In addition, the lead-in area 27 is provided on the inner peripheral side in contact with the clamp area 24.
Is provided. A data recording area 28 is defined between the lead-out area 26 and the lead-in area 27.

Recording layer (light reflecting layer) 17 in the information area 25
Recording tracks are continuously formed in, for example, a spiral shape. The continuous track is divided into a plurality of physical sectors, and these sectors are numbered consecutively. Various data is recorded on the optical disc 10 using this sector as a recording unit.

The data recording area 28 is an actual data recording area. As recording / reproducing information, video data (main video data) of movies, sub-video data of subtitles / menus, and lines / sound effects are recorded. Audio data is recorded as a pit train (a physical shape or a phase change state that causes an optical change in laser reflected light).

When the optical disk 10 is a recording / reproducing RAM disk, the recording layer 17 is a triple layer in which a phase change recording material layer (for example, Ge2Sb2Te5) is sandwiched between two zinc sulfide / silicon oxide mixtures (ZnS / SiO2). It can be configured by.

Read-only DVD-ROM disc 1
In the case of 0, a pit train is formed in advance on the substrate 14 by a stamper, a reflective layer of metal or the like is formed on the surface of the substrate 14 on which the pit train is formed, and this reflective layer is used as the recording layer 17. . In such a DVD-ROM disc 10, normally, no groove is provided as a recording track, and a pit row formed on the surface of the substrate 14 functions as a track.

In each of the various optical discs 10 described above, read-only ROM information is recorded in the recording information area of the recording layer 17 as an embossed signal. On the other hand, on the substrate 14 having the recording / reproducing recording layer 17, such an embossed signal is not engraved in the recording information area, but instead, a continuous groove groove is engraved. A phase change recording layer is provided in the groove. For DVD-RAM discs for recording / playback,
In addition to the groove, the phase change recording layer in the land portion is also used for information recording.

The DVD digital video recorder, which will be described later, is a repetitive recording / reproducing (reading / writing) and D recording for a DVD-RAM disc (or a DVD-RW disc).
The VD-ROM disc is configured to be repeatedly reproducible.

FIG. 2 shows the optical disk (DVD-RA
It is a figure explaining the correspondence of the data recording area 28 of M) 10 and the recording track of the data recorded there.

The disk 10 is a DVD-RAM (or D
In the case of VD-RW), the main body of the disk 10 is housed in the cartridge 11 in order to protect the delicate disk surface. When the DVD-RAM disk 10 together with the cartridge 11 is inserted into a disk drive of a DVD video recorder to be described later, the disk 10 is pulled out from the cartridge 11 and clamped by a turntable of a spindle motor (not shown) so as to face an optical head (not shown). It is driven to rotate.

On the other hand, the disk 10 is a DVD-R or D
In the case of a VD-ROM, the main body of the disc 10 is not housed in the cartridge 11, and the bare disc 10 is set directly on the disc tray of the disc drive.

The recording layer 17 of the information area 25 shown in FIG.
The data recording tracks are continuously formed in a spiral shape. As shown in FIG. 2, the continuous track is divided into a plurality of logical sectors (minimum recording unit) having a constant storage capacity, and data is recorded on the basis of the logical sectors. The recording capacity of one logical sector is set to 2048 bytes (or 2 kbytes), which is the same as the one-pack data length described later.

The data recording area 28 is an actual data recording area in which management data, main video (video) data, sub-video data and audio (audio) data are similarly recorded.

FIG. 3 shows a hierarchical structure of data recorded on the optical disk 10 as an information storage medium capable of recording and reproducing video information and music information shown in FIGS.

The data recording area 28 formed on the optical disk 10 shown in FIGS. 1 and 2 has a hierarchical structure of data as shown in FIG. The logical format of this structure is, for example, one of the standards, ISO966.
0 and Universal Disk Format (UDF)
It is defined according to the bridge.

As shown in FIG. 3, a lead-in area 27 is provided on the inner circumference side of the optical disc 10, and a lead-out area 26 is provided on the outer circumference side thereof. The data recording area 28 is allocated as a volume space 28. This volume space 28 is a space for volume and file structure information (volume / file management area 70) and a DVD standard application space (DVD data area). 71).

The lead-in area 27 has a read-only emboss zone having a concave and convex light reflection surface, a mirror zone formed by a flat mirror surface, and a rewritable data zone in which information can be rewritten. ing. The lead-out area 26 is composed of a rewritable data zone in which information can be rewritten.

Embossed data in the lead-in area 27
In the zone, the disc type such as DVD-ROM (read-only DVD disc), DVD-RAM (DVD disc for recording / reproducing) and DVD-R (recordable DVD disc), disc size, recording density, and start of recording / Information about the entire information storage medium such as the physical sector number indicating the recording end position is recorded, and the recording power and recording pulse width necessary for recording data on the recording layer 17 and the data recorded on the recording layer 17 are recorded. Information on the erasing power necessary for erasing, the reproducing power necessary for reproducing the data recorded on the recording layer 17, and information on recording / reproducing / erasing characteristics such as linear velocity at the time of recording / erasing is recorded. Further, in the embossed data zone of the lead-in area 27, information regarding the manufacture of one information storage medium, such as the manufacturing number, is recorded in advance. In the rewritable data zone 27 of the lead-in and the rewritable data zone of the lead-out 26, a recording area for recording the unique disc name of each information storage medium, and confirming whether recording and erasing are possible under the recording and erasing conditions For confirmation, there is a confirmation test recording area, a management information recording area related to the presence / absence of a defective area in the data area 72, and an address of the area, and preliminary processing for enabling data recording in the data area 72 is performed. Information necessary for recording, erasing and reproducing data thereafter is recorded in this area.

The volume space 28 is physically divided into a large number of sectors, and these physical sectors are numbered consecutively. The logical address of the data recorded in this volume space (data recording area) 28 is
Indicates a logical sector number, as defined by ISO9660 and UDF Bridge. The logical sector size here is the same as the effective data size of the physical sector,
The logical sector number is 2048 bytes (2 kbytes), and consecutive numbers are added to the logical sector numbers in ascending order of the physical sector numbers.

The volume space 28 has a hierarchical structure and includes a volume / file management area 70 and a data area 72 consisting of one or more video objects. These areas 70 and 72 are divided on the boundary of logical sectors. Here, one logical sector is defined as 2048 bytes, and one logical block is also defined as 2048 bytes. Therefore, one logical sector is defined as one logical block.

The volume / file management area 70 is a rewritable data zone that can be recorded / rewritten by the user and corresponds to the management area defined by ISO9660 and UDF bridge. Information about a file or volume of video data is stored in a system memory (not shown) inside the DVD video recorder described later. Normally, the volume / file management area 70 is composed of one file.

As shown in FIG. 3, the data area 72 is defined as an area where mixed recording of computer data and audio / video is possible. The recording order of computer data and audio / video and the size of each recording information are arbitrary, and the areas in which computer data is recorded are referred to as computer data areas 74-1 and 74-2. The area in which is recorded is called the audio and video data area 76. The computer data areas 74-1 and 74-2 are recording areas 7
In the case where only audio and video data is recorded in No. 2, it may not be provided due to its nature. Similarly, in the audio and video data area 76, only computer data is recorded in the recording area 72. However, it is not necessary to be provided in particular because of its nature. Each of the computer data areas 74-1 and 74-2 and the audio and video data area 76 is composed of one or a plurality of files.

In the audio and video data area 76, as shown in FIG. 3, the control information 78 and the reproduction target, that is, 1 as a content, necessary for performing each processing of recording (recording), reproduction, editing and retrieval. Or multiple videos
A video object set 80 consisting of objects 82, 84, 86 is recorded. The video object 80 includes a video object 80 whose content is video data, a still image such as a still slide, or a place in the video data to be viewed.
There are picture objects 84 which are picture data such as thumbnails for searching or editing, and audio objects 86 whose content is audio data. As will be appreciated, the video object set 80 includes these objects 82, 84, 86.
It is sufficient to be configured with at least one of the above, and it is not necessary to include all the objects 82, 84, 86. Similarly, each of the objects 82, 84 and 86 is composed of one or a plurality of files.

One or more objects 82, 84, 8
The video object set 80 composed of 6
As shown in FIG. 4, video data compressed according to the MPEG standard (video pack 88 described below), audio data compressed according to a predetermined standard or uncompressed (audio pack 90 described later), and run-length compressed sub-picture. Data (sub-picture pack 92 containing bitmap data in which one pixel is defined by multiple bits described later)
Is stored. As is apparent, when the video object set 80 is composed of the video objects 80, it has a data structure as shown in FIG. 4, and the video object set 80 is composed of the picture objects 84. In case, Audio Pack 90
Video pack 88 and / or sub-picture pack 9 not including
It has a data structure consisting of only 2
When the object set 80 is composed of the audio objects 86, it has a data structure composed only of the audio pack 90 not including the video pack 88 and the sub-picture pack 92.

As shown in FIG. 9, a logical video object set 80, ie, video, picture and audio objects 82, 84, 86, is made up of a plurality of cells 94, each cell 84 comprising one or more cells. The video object unit (VOBU) 96 is used. In this cell 84, in principle, the video object unit (VOBU) 96 is decoded and played back in the arrangement order in that cell 84. Each video object unit 85 has a video pack (V pack) 8
8, a sub-picture pack (SP pack) 92, and an audio pack (A pack) 90, which is an aggregate (pack row) and is reproduced as data to be reproduced in a certain period, for example, a period of 0.5 to 1.2 seconds. Is defined. These packs are the minimum unit when performing the data transfer process, and the data is logically processed with the cell as the minimum unit. This video object unit (VOBU) has an identification number (ID
N # k; k = 0 to k) is added, and the video object unit 96 can be specified by this identification number. This video object unit (VOB
The reproduction period of (U) 96 normally corresponds to the reproduction time of video data composed of one or more video groups (group of pictures; GOP for short) included in the video object unit (VOBU) 85. . Normal,
1 GOP is usually about 0.5 seconds according to the MPEG standard, and is set as screen data compressed so as to reproduce about 15 frame images during that period.

The video object unit VOBU
Video pack 8 if 96 contains video data
A video data stream is formed by arranging GOPs (conforming to the MPEG standard) composed of 8, sub-picture packs 90 and audio packs 91. In addition, even if there is reproduction data of only audio and / or sub-picture data, the video object unit (VOBU) 96
Playback data is configured as a unit. For example, as in the case of the video object VOB of video data,
The audio pack 90 to be reproduced within the reproduction time of the video object unit (VOBU) 85 to which the audio data belongs is stored in the video object unit (VOBU) 96.

An identification number (IDN # i; i = 0 to i) is attached to each of the video objects 82, 84 and 86 forming the video object set 80, and the video objects 82, 84 and 86 are identified by this identification number. Can be specified. Further, each cell 94 has an identification number (C) as in the case of the video objects 82, 84 and 86.
_IDN # j) is attached.

FIG. 5 shows the general structure of the video pack 88, the sub-picture pack 92 and the audio pack 90. All of these packs are composed of data in units of 2048 bytes, like the logical sector in FIG. The video, audio and sub-picture packs 88, 90, 92 are
As shown in FIG. 5, the pack header 98 and the packet 10
It consists of zero. The packet 100 includes a packet header, and a decoding time stamp (DST) and a presentation time stamp (PTS) are recorded in this packet header.

The control information shown in FIG. 3 includes reproduction control information 102 indicating control information necessary for reproduction, recording control information 104 indicating control information necessary for recording (recording / recording), and control information necessary for editing. It includes edit control information 106 shown and thumbnail picture control information 108 showing management information relating to a thumbnail for searching for a desired place in video data or an edit thumbnail.

The reproduction control information 102 shown in FIG. 3 corresponds to the management information table (PLY_MA) as shown in FIG.
T) 122, a program chain (PGC) information table (PGCIT) 110, and a reproduction interruption information table (PLY_IIT) 124. Information as shown in FIG. 7 is described in the management information table (PLY_MAT) 122, and this program chain (PGC)
The information table 110 has a data structure as shown in FIG. 8, and the reproduction interruption information table 124 describes information as shown in FIG.

As shown in FIG. 8, the PGC information table 110 includes PGC information management information 112 and search pointers # 1 to # n114 for searching each PGC information.
And PGC information # 1 to # n116. Program chain (PGC) information table 11
0 describes the program chain (PGC) and information regarding the cell playback order, and is the data of the cell 94 recorded in the video object 82, that is, movie data as actual data configured by the video object unit 96. Are reproduced in accordance with the description of the program chain (PGC) information table 110. This program chain (PGC) information table 110 is
A search pointer 1 for searching the GC information management information 112, the PGC information # 1 to PGC information #n, and the PGC information (# 1) 116 to the PGC information (#n) 116.
It is composed of 14. Once the PGC number is determined,
By referring to the search pointer 114, the reproduction order of the cell for reproducing the PGC corresponding to the PGC number is acquired, and the data of the cell 94 as the actual data is acquired from the video object 82 according to the reproduction order of the cell. And the video is played. Although the video object 82 has been described here,
For the object 84 and the audio object 86, this program chain (PG
C) According to the description in the information table 110, cell data as actual data is taken out and reproduced.

Here, the PGC corresponds to a chapter in a movie story and indicates a unit for executing a series of reproductions in which the reproduction order of cells is designated. In other words,
If one PGC is compared to one drama, it can be construed that the plurality of cells 94 forming this PGC correspond to various scenes in the drama. The contents of this PGC (or the contents of the cell) are determined, for example, by the software provider who produces the contents recorded on the disc 10. Specifically, if there is a certain video data stream as shown in FIG. 10A, the inside of that is a video object unit 96 that is reproduced within a certain time.
A cell 94 is defined as a set of video object units 96 which are basically divided into two.

Here, the video object unit 9
Since 6 is basically continuous, in the PGC information 116, more specifically, in the cell playback information 120, as will be described later, the first video object unit 96 and the last video object constituting the cell are the same. Cell 94 is defined in unit 96. That is, the cell reproduction information 120
In the cell reproduction information in, the information of the reproduction section designated by the start address and the end address of the reproduction data forming the cell is described.

When the cell 94 is determined, the PGC is constructed by determining the reproduction order of the cell. For example, as shown in FIG. 10B, cell-A, cell-B, cell-B
PGC # 1 is defined by arranging the three cells 96 in the cell reproduction information table so that they are reproduced in the order of. Similarly, PGC # 2 is defined by arranging the three cells 96 in the table of cell reproduction information so as to be reproduced in the order of cell-D, cell-E, and cell-F, and further cell-Q, cell- R, cell-S, cell-T, cell-U
PGC # 3 is defined by arranging the five cells 96 in the table of cell playback information so as to be played back in the order of. Here, PGC # 1 corresponding to a chapter is created by linking PGC # 1 and # 2 with each other.
Then, PGC # 2 corresponding to the next chapter is reproduced. In other words, from cell-A to cell-F consecutively
Are played continuously. In the PGC, the cells 94 are reproduced in the arrangement order, but how to configure the PGC and the PG
Since the reproduction order of C is arbitrary, for example, a certain PGC
Can be defined as cells configuring other PGCs, and the linking method, that is, the link information can be arbitrarily determined, so that various stories can be created or edited. For example, PGC # 1 followed by PGC #
3 can be linked, and also PGC # 1 and PGC
It is possible to add the same cell to # 2, for example, cell G to make it a different chapter.
By linking PGC # 3 after # 1 or PGC # 2, an arbitrary story can be reproduced.

As shown in FIG. 7, the reproduction management table 122.
Describes an identifier ID indicating that it is reproduction control information.
Start address of video object set 80 (VOB
S_SA) and end address (VOBS_EA) are described, and the end address (C) of the control information (CTLI) 102 is described.
TLI_EA) and the end address (PLYI_EA) of the reproduction control information (PLYI) 102 are described. Further, the reproduction management table 122 has an attribute (C that indicates that the management information belongs to the format of the recording / reproducing DVD).
AT) is described, and audio / video data area 7
The attributes of the video in the video object set recorded in No. 6, for example, the attributes such as NTSC and wide are described, and the number of audio streams (AST_Ns) in the video object set recorded in the same manner and its attributes, A table that describes the compression method, etc. (AST_
ATR), and the number of sub-picture streams (SPST) in the video object set recorded in the same manner.
_Ns) and its description table (SPS)
T_ATR) is described. In addition, the user can display menu image data in the audio / video data area 76,
When moving image or still image data is recorded as an independent file, a flag (01) indicating that there is a user menu and a flag indicating that there is no user menu (00) when there is no such menu. Is described and a reduced image is recorded in the audio / video data area 76, the PGC number that is a representative of the reduced image and is the basis of the reduced image is described. . Furthermore, a flag (0: not played, 1: played) indicating whether or not the user has finished playing the video object set whose playback is controlled by the reservation and control information 78 is described.

PGC information management information (PGC_
The MAI) 112 includes information indicating the number of PGCs as shown in FIG.
As described above, 4 includes information that points to the beginning of each PGC information, which facilitates PGC search. The PGC information 116 is the PGC general information 118 shown in FIG. 7 and one or more cell reproduction information 1 shown in FIG.
It consists of twenty.

PGC information management information 112 (PGC_MA
I) is the PGC information table 110 as shown in FIG.
End address (PGC_TABLE_EA) of PGC
End address (PGC_MAI_EA) of information management information 112 (PGC_MAI), start address (PGC) of search pointer (PGC_SRP) 114 of PGC information
_SRP_SA) and end address (PGC_SRP_
EA), the start address (PGCI_SA) and end address (PGCI) of all PGC information (PGCI) 116.
_EA) and the number of all PGCs (PGC_Ns) are described.

The PGC general information (PGC_GI) 118 includes information indicating the PGC reproduction time and the number of cells, as shown in FIG. That is, the PGC general information (PGC_GI) 118 contains the number of PGCs, the contents of the PGC describing the number of cells (PGC_CNT), and the P
Playback time of GC (PGC_PB_TM), table (PGC_AST_CTL) in which information for controlling an audio stream included in the PGC is described, and PGC
Describes a table (PGC_SPST_CTL) in which information for controlling the sub-picture stream included in is described. Further, in the PGC general information (PGC_GI) 118, link information relating to the PGC to be linked to the PGC, for example, the previous PGC, the next PGC or the jump destination (GOup) PGC is described. PGC_NV_CTL), a sub-picture palette table (PGC_SP_PLT) in which reproduction information about a palette color of the sub-picture, etc. is described, and P
A start address (PGC_PG) of a program table (not shown) in which a list of programs constituting the GC is described
MAP_SA) is described. Further, in this table (PGC_GI), cell reproduction information (CELL_PL
Y_I) 120 start address (CELL_PLY_I
_SA), a flag indicating whether or not there is menu data created by the user for the PGC (01: menu data exists, 00: menu data does not exist), reservation, whether or not reproduction by the user of the PGC has ended. Flag (0: not replayed, 1: replayed) and whether or not to desire to save the PGC in the future (ARCHIV
E Flag), that is, a flag (0: free [erasable], 1: permanent) indicating whether or not to permanently save.

The cell reproduction information (CELL_
In the PLY_I) 120, as shown in FIG. 13, a category (C_CAT) of a cell, for example, whether this cell belongs to a block or, if it belongs, the block is an angle block is described. Also, cell playback information (CEL
L_PLY_I) 120 describes the reproduction time (absolute time) of the cell in the PGC, and a flag indicating whether the reproduction of the cell by the user has ended (0: not reproduced,
1: Played) and a flag (ARCHIVE Flag) as to whether or not the cell is desired to be saved in the future.
That is, the flags (0: free [erasable], 1: permanent) of whether or not to permanently save are described. Further, cell reproduction information (CELL_PLY_I) 12
In 0, the start address (CELL_SA) and end address (CELL_EA) of the cell are described as the addresses of the first and last video object units (VOBU) in the cell as relative addresses from the beginning of the video object set 80.

Here, the angle block means a block whose angles can be switched. The angle switching means changing the angle at which the subject image is viewed (camera angle). In the example of a rock concert video, you can see scenes from various angles such as scenes captured by vocalists, scenes captured by guitarists, scenes captured by drummers, etc. in the same song performance scene (same event). Means that you can.

The case where the angle is switched (or changed) is that the angle can be selected according to the viewer's preference, or the same scene is automatically changed and repeated in the story flow. (If the software producer / provider configured the story as such; or if the user of the DVD video recorder made such an edit).

The reproduction interruption information table 12 shown in FIG.
Reference numeral 4 is a table in which reproduction interruption information written when the user interrupts reproduction is described.
24, a title number relating to a title whose reproduction has been interrupted, a part-of-title number whose reproduction has been interrupted, a PGC number whose reproduction has been interrupted, and a P which interrupted reproduction
All or part of the program number in the GC, the cell ID for which the reproduction is interrupted, and the ID of the video object for which the reproduction is interrupted is recorded when the reproduction is interrupted. Here, the title corresponds to a specific title composed of video objects, and the video object is managed for each title. When the user designates a part (part) of the title by dividing the title into a plurality of parts, a part-of-title number is added and the number is recorded as the interruption information. When the user is a music fan, the program of a certain singer can be recorded and the scene of the special song in it can be designated as the part of title, and the information regarding this scene will be recorded as the interruption information. Further, in the reproduction interruption information table 124, when the reproduced image is a still image or a still image, the time during which the still image continues and the remaining time of the still at the time of the reproduction interruption are recorded, and the reproduction of a certain cell is performed. The elapsed time is recorded as interruption information, and time information for time search for temporally specifying the interruption time in the video object set (VOBS) or the video object (VOB) and the interrupted video object unit (VOBU) 96. A presentation time stamp indicating the time to be reproduced (present), an address at which reproduction is interrupted, for example, a video object unit (VOBU) 96 or a physical sector address on an optical disk at which reproduction is interrupted are recorded. Other,
The reproduction interruption information table 124 is used for the audio
Stream number and whether or not the sub video stream is selected (whether or not to display the sub video) When the sub video stream is selected and the sub video is displayed, the sub video stream number at the time of interruption Is recorded. In addition, general parameters (GPRM
0 to 15) are described. The general parameters (GPRM0 to GPRM15) are parameters for storing the history of actions performed by the user in the memory and changing the action of the player based on the details. In any case, the contents described in the reproduction interruption information table 124 as the interruption information may be added as necessary in addition to the items shown in FIG. 9, and the minimum required among the items shown in FIG. The limit may be recorded. Also, this reproduction interruption information table 124
6 is provided as an independent file in the same layer as the reproduction management table 122 as shown in FIG. 6, but may be provided in the reproduction management table 122, or a layer higher than the reproduction management table 122, For example, it may be provided in the same layer as the reproduction control information 102 or in the same layer as the control information 78.

The recording control information 104 shown in FIG. 6 includes the recording management table 126 shown in FIG. 14, and the recording management table 126 has the end address (RECI_EA) of the recording control information 104 and the end of the recording management table 126. An address (REC_MAT_EA) is described, and an empty area (FREE) for writing information regarding recording management
_SPACE) is provided. Further, in the recording management table 126, a flag (ARCHIVE Flag) as to whether or not it is desired to save the entire VOBS,
That is, the flags (0: free [erasable], 1: permanent) of whether or not to permanently save are described.

FIG. 15 shows the disk of FIG.
The configuration of an apparatus (DVD video recorder) that records and reproduces digital moving image information at a variable recording rate by using the information having the structure described in FIG.

The apparatus body of the DVD video recorder shown in FIG. 14 is roughly a DVD-RAM or a DVD-R.
A disc drive unit (32, 32) that rotationally drives the disc 10 to read / write information from / to the disc 10.
34), an encoder section 50 constituting the recording side, a decoder section 60 constituting the reproducing side, and a microcomputer block 30 controlling the operation of the apparatus main body.

The encoder section 50 includes an ADC (analog /
Digital converter) 52, video encoder (V encoder) 53, audio encoder (A encoder)
54, a sub-picture encoder (SP encoder) 55,
The formatter 56 and the buffer memory 57 are provided.

The ADC 52 has an external analog video signal from the AV input section 42 and an external analog audio signal,
Alternatively, the analog TV signal + analog audio signal from the TV tuner 44 is input. The ADC 52 digitizes the input analog video signal with, for example, a sampling frequency of 13.5 MHz and a quantization bit number of 8 bits. (That is, each of the luminance component Y, the color difference component Cr (or Y−R) and the color difference component Cb (or Y−B) is quantized with 8 bits.) Similarly, the ADC 5
2 digitizes the input analog audio signal with a sampling frequency of 48 kHz and a quantization bit number of 16 bits.

When an analog video signal and a digital audio signal are input to the ADC 52, AD
C52 allows the digital audio signal to pass through.
(The contents of the digital audio signal may not be modified, and only the jitter associated with the digital signal may be reduced, or the sampling rate or the number of quantization bits may be changed).

On the other hand, when a digital video signal and a digital audio signal are input to the ADC 52, AD
The C52 allows a digital video signal and a digital audio signal to pass through (these digital signals may be subjected to jitter reduction processing, sampling rate changing processing, etc. without changing the contents).

The digital video signal component from the ADC 52 is sent to the formatter 56 via the video encoder (V encoder) 53. The digital audio signal component from the ADC 52 is sent to the formatter 56 via the audio encoder (A encoder) 54.

The V encoder 53 has a function of converting an input digital video signal into a digital signal compressed at a variable bit rate based on the MPEG2 or MPEG1 standard.

The A encoder 54 has a function of converting the input digital audio signal into a digital signal (or linear PCM digital signal) compressed at a fixed bit rate based on the MPEG or AC-3 standard. .

When a DVD video signal having a data structure as shown in FIGS. 4 and 5 is input from the AV input section 42 (for example, a signal from a DVD video player with an independent output terminal of a sub video signal), or such a case When a DVD video signal having a data structure is broadcast and received by the TV tuner 44, the sub video signal component (sub video pack) in the DVD video signal is input to the sub video encoder (SP encoder) 55. The sub-picture data input to the SP encoder 55 is arranged in a predetermined signal form and sent to the formatter 56.

The formatter 56 has a buffer memory 57.
Using as a work area, the specified signal processing is performed on the input video signal, audio signal, sub-picture signal, etc., and the recording conforms to the format (file structure) described with reference to FIGS. The data is output to the data processor 36.

Here, a brief description will be given of the contents of standard encoding processing for creating the recording data. That is, when the encoding process is started in the encoder unit 50 in FIG. 15, parameters necessary for encoding video (main image) data and audio data are set. Next, the main video data is pre-encoded using the set parameters, and the distribution of the optimum code amount for the set average transfer rate (recording rate) is calculated. In this way, the main video is encoded based on the code amount distribution obtained by the pre-encoding. At this time, audio data encoding is also executed at the same time.

As a result of the pre-encoding, if the data compression amount is insufficient (if the desired video program cannot fit on the DVD-RAM disc or DVD-R disc to be recorded), it is possible to re-encode. If the source of the recording is a repeatable source, such as a videotape or video disc, then a partial re-encoding of the main video data is performed, and the re-encoded part of the main video data is pre-encoded earlier. The replaced main video data portion is replaced. By such a series of processing, the main video data and the audio data are encoded, and the value of the average bit rate required for recording is significantly reduced.

Similarly, the parameters necessary for encoding the sub-picture data are set, and the encoded sub-picture data is created.

The main video data, the audio data and the sub video data encoded as described above are combined and converted into a structure of a video object.

That is, main video data (video data)
The cell is set as the minimum unit of, and cell reproduction information (C_PLY_I) as shown in FIG. 13 is created. Next, the configuration of the cells that make up the program chain (PGC), the attributes of the main video, the sub-video, and the audio are set (some of these attribute information are obtained by encoding the data. Playback control information 1 including various information described with reference to FIGS. 3 and 6.
02 is created.

The encoded main video data, audio data and sub video data are subdivided into packs of a fixed size (2048 bytes) as shown in FIG. These packs have PTS (presentation time stamp) and DTS (decode time stamp) as appropriate.
Etc., the time stamp is described. For the PTS of the sub-picture, a time arbitrarily delayed from the PTS of the main picture data or audio data in the same reproduction time zone can be described.

Then, so that each data can be reproduced in the order of the time code, they are grouped into a VOBU 96 as data to be reproduced within a fixed time, each data cell is defined while arranging this VOBU 96, and is composed of a plurality of cells. VOB is configured. A V that combines one or more of this VOB
The OBS 80 is formatted in the structure of FIG.

The disc drive unit for reading / writing (recording and / or reproducing) information from / to the DVD disc 10 is a disc changer unit 110, a disc drive 32, a temporary storage unit 34, and a data processor 36.
And a system time counter (or system time clock; STC) 38.

The temporary storage unit 34 is used for the disk drive 32.
Buffering a fixed amount of data (data output from the encoder unit 50) written to the disk 10 via the disk 10 or data reproduced from the disk 10 via the disk drive 32 (input to the decoder unit 60). Data) to be buffered.

For example, when the temporary storage unit 34 is composed of a semiconductor memory (DRAM) of 4 Mbytes, an average of 4 M
It is possible to buffer recording or reproducing data for about 8 seconds at a recording rate of bps. When the temporary storage unit 34 is composed of a 16-Mbyte EEPROM (flash memory), it is possible to buffer record or reproduction data for about 30 seconds at an average recording rate of 4 Mbps. Further, when the temporary storage unit 34 is composed of a 100-Mbyte ultra-compact HDD (hard disk), it is possible to buffer the recorded or reproduced data for 3 minutes or more at an average recording rate of 4 Mbps.

The temporary storage section 34 is used for the disc 1 during recording.
When 0 is used up, it can be used for temporarily storing recording information until the disc 10 is replaced with a new disc.

Further, when the high speed drive (double speed or more) is adopted as the disk drive 32, the temporary storage unit 34 temporarily stores the data read extra than the normal drive within a fixed time. Is also available. If the read data at the time of reproduction is buffered in the temporary storage unit 34, the reproduction data buffered in the temporary storage unit 34 is switched and used even when an optical pickup (not shown) causes a reading error due to vibration shock or the like. This makes it possible to prevent playback video from being interrupted.

Under the control of the microcomputer block 30, the data processor 36 of FIG. 14 supplies the DVD recording data from the encoder section 50 to the disk drive 32 and the DVD reproduced from the disk 10.
The playback signal is taken out from the drive 32, or the disc 1
Management information recorded on the disk 10
Deletes the data (file or VTS) recorded in.

The microcomputer block 30 has M
It includes a PU (or CPU), a ROM in which a control program and the like are written, and a RAM that provides a work area necessary for executing the program.

The MPU of the microcomputer block 30 uses the RAM as a work area according to the control program stored in the ROM, and functionally defines the reproduction end information setting section 30A, which determines the reproduction end information.
As has a reproduction end information extracting section 30B for extracting reproduction end information, a reproduction information restart instruction section 30C for instructing to restart reproduction by the reproduction information, and a reproduction restart position determining section 30D for determining a position at which reproduction is restarted. Be operated.

Of the execution results of the MPU 30, the contents to be notified to the user of the DVD video recorder are displayed on the display unit 48 of the DVD video recorder or on the monitor display by the on-screen display (OSD).

The MPU 30 includes a disk changer unit 100, a disk drive 32, a data processor 36,
The timing for controlling the encoder unit 50 and / or the decoder unit 60 can be executed based on the time data from the STC 38 (the recording / playback operation is normally executed in synchronization with the time clock from the STC 38). However, other processing may be executed at a timing independent of the STC 38).

The decoder section 60 includes a separator 62 for separating and extracting each pack from the DVD reproduction data having a pack structure as shown in FIG. 5, a memory 63 used when executing signal processing such as pack separation, and a separator 62. A video decoder (V decoder) 64 that decodes the separated main video data, a sub video decoder (SP decoder) 65 that decodes the sub video data (contents of the sub video pack 90) separated by the separator 62, and a separator 6.
An audio decoder (A decoder) 68 that decodes the audio data (contents of the audio pack 91 of FIG. 9) separated by 2 and the video data from the V decoder 64 are appropriately combined with the sub-picture data from the SP decoder 65, A video processor 66 that outputs sub-images such as menus, highlight buttons, subtitles, etc. on the main image, and a video-to-digital-analog converter (V-DAC) that converts the digital video output from the video processor 66 into an analog video signal. ) 67 and an audio / digital / analog converter (A / DAC) 6 for converting the digital audio output from the A decoder 68 into an analog audio signal
Equipped with 7.

The analog video signal from the V / DAC 67 and the analog audio signal from the A / DAC 67 are transmitted via the AV output section 46 to an external component (not shown) (a multi-channel stereo device of 2 to 6 channels + a monitor TV or a projector). ) Is supplied to.

The data processing operation in the above-mentioned recording / reproducing apparatus (DVD video recorder), that is, the recording processing and the reproducing processing will be described below.

In the data processing at the time of recording, first, when the MPU unit 30 receives a recording command by a key input by the user, necessary management data is DV from the drive unit 32.
The area to be read from the D disk 10 and to be written is determined. Next, the management area is set so that the recording data is written in the determined area, the write start address of the video data is set in the drive section 32, and the data recording is prepared.

Here, the management area to be set refers to the file management unit (in ISO 9660, which indicates directory decoding) and control information 78 that manages files,
Record the necessary parameters in the file management section.

Next, the MPU unit 32 resets the time in the STC unit 38. Here, the STC unit 38 performs recording and reproduction based on this value by the system timer. After that, the MPU unit 30 executes the settings of the other units.

Here, the flow of the video signal is as follows. That is, first, an AV signal input from the TV tuner unit 44 or an external input is A / D converted by the ADC 52, a video signal is a video encoding unit 53, an audio signal is an audio encoding unit 54, and the TV tuner unit 4 is used.
4, the closed caption signal or the text signal such as teletext is input to the SP encoding unit 55.

Each decoding section compresses each signal and packetizes it (however, each packet is divided into 2048 bytes per pack when packetized and packetized), and is sent to the formatter section 56. input. Here, each of the decoder units 53, 54, 55 is
According to the value of the C section 38, the PTS and DTS of each packet are determined and recorded as necessary.

The formatter unit 56 temporarily stores the packet data in the buffer memory unit 57, then packs each input packet data, mixes each GOP, and inputs it to the D-PRO unit 36.

The D-PRO unit 36 collects every 16 packs, forms an ECC group, attaches an ECC, and sends it to the drive unit 32. However, if the drive unit 32 is not ready to record on the disc 10, the drive unit 32 transfers the data to the temporary storage unit 34, waits until data is ready to be recorded, and starts recording at the stage when it is ready. Here, the temporary storage unit 3
Since No. 4 holds recording data for several minutes or more by high speed access, a large capacity memory is assumed.

At the end of recording, the reproduction control information 102 of the control information 78 and the volume & file management area 70.
After that, necessary information is recorded and the recording operation is finished.
However, the microcomputer can read and write the volume and file management area 70 of the file and the like through the microcomputer bus to the D-PRO section 36.

In the data processing at the time of reproduction, first, when the MPU section 30 receives a reproduction instruction by the user's key input, the D-PRO section 36 from the drive section 32 is received.
Through, the volume & file management area 70 is read and the address to be reproduced is determined. Here, the management area refers to a volume descriptor and a file management unit, determines whether the disc is a DVD disc by the volume descriptor, extracts the control information 78 from the information of the file management unit, and uses the control information 78 as a title to be reproduced. The corresponding video objects 82, 84, 86 are determined, and the address at which the reproduction is started is determined.

Next, the MPU section 30 sends to the drive section 32 the address of the data to be reproduced and the read command which have been determined previously. The drive unit 32 reads the sector data from the disk 10 according to the sent instruction, corrects the error in the D-PRO unit 36, and outputs it to the decoder unit 60 in the form of pack data.

In the decoder section 60, the separator 62 receives the read pack data and packetizes it.
Depending on the purpose of the data, video packet data (MPE
G video data) is transferred to the video decoding unit 64,
The audio packet data 68 is transferred to the audio decoding unit 68, and the sub-picture packet data is transferred to the SP decoding unit 65. At the start of transfer, each packet data sent loads the PTS into the STC unit, and the PTS in the pack is set in the STC 38 by the MPU unit 30.
Alternatively, the video decoder unit 64 automatically sets the PTS of video data in the STC unit. ) After that, each decoding unit performs PTS (Presentation
Playback processing can be performed in synchronization with the value of (time stamp) (while comparing the values of PTS and STC) to play a moving image with audio subtitles on the TV.

Further, the reproducing microcomputer operation of this patent will be described with reference to the operation flows shown in FIGS. Here, the normal playback operation starts when the PLAY key is pressed. At this time, if the title number is not specified in advance, the file of title 1 corresponding to the default,
That is, the reproduction of the video object (VOBU) is started.

When step S10 shown in FIG. 16 is started, control information 78 is first displayed as shown in step 12.
Is read. That is, the PGC information 116 shown in FIG. 8 in the control information 78 is read by the MPU 30. When the user specifies the title as shown in step 14 or when the default title 2 is selected, the PGC information table 1 is displayed according to the specified title number.
Each piece of information of the target title is fetched from the title search point 10 and the start address of the video object is fetched. That is, the PGC number and cell number to be reproduced are determined. Also, as shown in step S16, each decoder is initialized according to the contents written in the reproduction management table of the control information. P as shown in step 18
The cell to be reproduced is searched according to the content of GCI116,
The required pre-processing command is executed. This preprocessing command is described in a command table provided in the PGC information table 110 as needed, and fetched as needed. After that, the cell is reproduced as shown in step S20. If the reproduced cell is not the final cell as shown in step S22, the next cell number is counted up as shown in step S24, and the process proceeds to step S20.

In step S22, the cell reproduction is waited until the cell reproduction is completed, and after the cell reproduction is completed, as shown in step S26, the still picture is reproduced for the still time of the cell. Here, if the still time is 0, the process directly proceeds to step S28. Then, in step S28, the post-processing command is executed. This post-processing command is described in the command table provided as needed in the PGC information table 110 as with the pre-processing command, and is extracted as needed.

At step S30, if there is a PGC to be reproduced next instead of the end of reproduction, the next P
After determining the GC number, the process proceeds to step S18. If the reproduction has ended, a reproduction end process is executed in step S32. That is, each decoder is reset,
Operations such as resetting the GPRM are executed.

Next, steps S20 and S22 of FIG.
The cell reproduction microcomputer operation shown in FIG. 17 will be described according to the operation flow shown in FIG. When the process at the time of cell reproduction shown in step S40 is started, it is checked whether VOBUs are continuous as shown in step S42. If they are continuous, the process proceeds to step S48. If the cells are not continuous in step S42, the reproduction start address is determined by referring to the PGC information 116 in step 44, and the reproduction start address is set in the drive unit 32 together with the data read command. The control information 78, that is, the cell reproduction start time (C_PBTM) in the cell reproduction information 120 is taken into the MPU 30 and stored in the RAM. This cell reproduction start time (C_PBTM) is displayed on the display device, and cell reproduction is continued based on this reproduction time. Step S5
When the stop key is pressed during cell reproduction as shown in 0, the process proceeds to step 60 and the reproduction interruption operation is started. That is, the necessary reproduction interruption information is written in the reproduction interruption information table prepared as one file shown in FIG. Then, as shown in step S62, the cell reproduction is terminated based on the reproduction stop instruction.

If the stop key is not pressed during reproduction of the cell in step S50, it is confirmed in step S52 whether or not the cell corresponds to the last cell, and if it is not the last cell, the process returns to step S50. . If it is the last cell, the process waits until the reproduction of the last VOBU in the cell is completed as shown in step S54. When the reproduction of the final VOBU is completed, step S
As indicated by 56, the still time of the cell is stopped and the process proceeds to the next step S58. Here, if the still time is 0, the process directly proceeds to the next step S58. Since it is the final cell in step 58, the process proceeds to step S26 shown in FIG.

A process in which, for example, the DVD disc 10 is taken out after the cell reproduction is interrupted, and then the DVD disc 10 is loaded into the DVD recorder again to continue the reproduction will be described with reference to FIG.

When the DVD recorder 10 is loaded into the DVD recorder and the continuous playback key is pressed to execute the continuous playback as shown in step S70, first, the step S is performed.
As shown at 72, the reproduction interruption information table shown in FIG. 9 is read from the disc. Based on the reproduction interruption information of the reproduction interruption information table, as shown in step S74, the reproduction title at the time of interruption, in other words, the video object is determined and the register of each unit is set based on the information, and the RAM of the MPU 30 is set. Necessary information in the information is re-stored in. Then, the control information 102 is read in step S76. Here, PGC information 11
6 is stored in the RAM of the MPU 30. Further, as shown in step S78, the PGC number, cell number, and VOB to be reproduced based on the reproduction interruption information in the reproduction interruption information table.
The U number is determined, and the video decoder 64, the sub-picture decoder 65 and the audio decoder 68 are similarly set based on the reproduction interruption information as shown in step S80.
As shown in step S82, it is confirmed whether or not the address for restarting the reproduction is at the head of the cell. If the address is at the head of the cell, the preprocessing command is executed as in step 18 of the normal reproduction processing, and thereafter, 16 from step S90
Then, the normal reproduction process shown in FIG. That is, the process at the time of cell reproduction is executed as in step S20 of FIG. If the address for resuming the reproduction is not the head of the cell, the PGC information 116 is read out and the reproduction start address is determined as shown in step S84. For example, VOBU
First VOBU of the cell referenced to the relative address of
Is added to the relative address to determine the reproduction start address. When the reproduction start address is determined, a read command is issued to the drive unit 32 at that address as shown in step S86, and the VOBU is the first VOBU in the same manner as in normal cell reproduction in step S90.
Playback is resumed as. Step S92 after this restart
From step 104 to step S2 shown in FIG.
The process from 2 to S34 corresponds to the process, and the same process as already described is executed. Therefore, for the detailed description, refer to steps S22 to S34 shown in FIG.

[0110]

As described above, according to the present invention, since the reproduction interruption information is described in the disc as the recording / reproducing information recording medium, even if the disc is removed from the system, the reproduction interruption information continues. Playback is possible.

[Brief description of drawings]

FIG. 1 is a recordable and reproducible optical disc (DVD-RAM.
Or a perspective view for explaining the structure of a DVD-RW disc).

FIG. 2 is a diagram illustrating a correspondence relationship between a data recording area of the optical disc (DVD-RAM) of FIG. 1 and a recording track of data recorded therein.

3 is a diagram illustrating a directory structure of information recorded on the optical discs of FIGS. 1 and 2. FIG.

4 is a diagram showing a data structure of the video object set shown in FIG.

5 is a diagram showing the structure of the data pack shown in FIG.

6 is a diagram showing a data structure of control information shown in FIG.

FIG. 7 is a reproduction management table (PLY_M) shown in FIG.
The figure which shows the content of AT).

8 is a diagram showing a data structure of a PGC information table shown in FIG.

9 is a diagram showing the contents of a reproduction interruption information table shown in FIG.

10 is a diagram for explaining the concept of the PGC shown in FIG.

11 is a diagram showing the contents of PGC information management information shown in FIG.

12 is a diagram showing the content of PGC general information shown in FIG.

FIG. 13 is a diagram showing the contents of cell reproduction information shown in FIG. 8.

14 is a diagram showing the contents of the recording management table shown in FIG.

15 is a block diagram illustrating a configuration of a device (DVD video recorder) for recording / reproducing digital moving image information by using information having the structure described in FIGS. 2 to 14 on the disc of FIG. 1.

16 is a flowchart showing a normal reproduction operation in the DVD video recorder shown in FIG.

FIG. 17 is a flowchart showing processing during cell reproduction during the normal reproduction operation in the DVD video recorder shown in FIG.

18 is a flowchart showing a continuous reproduction operation in the DVD video recorder shown in FIG.

[Explanation of symbols]

10 ... Recordable / reproducible optical disk (DVD-RAM or DVD-R), 11 ... Cartridge (DVD-RAM)
), 14 ... Transparent substrate (polycarbonate), 16 ... Light reflecting layer, 17 ... Recording layer, 19 ... Read-out surface, 20 ... Adhesive layer, 22 ... Center hole, 24 ... Clamping area, 25 ...
Information area, 26 ... Lead-out area, 27 ... Lead-in area, 28 ... Data recording area, 30 ... Microcomputer block (MPU / ROM / RAM), 3
2 ... Disk drive, 34 ... Temporary storage unit, 36 ... Data processor, 38 ... System time counter STC, 4
2 ... AV input section, 44 ... TV tuner (terrestrial broadcast / satellite broadcast tuner), 46 ... AV output section, 48 ... DVD video recorder display section (liquid crystal or fluorescent display panel), 50
Encoder unit, 52 ... ADC, 53 ... Video encoder, 54 ... Audio encoder, 55 ... Sub-picture encoder, 56 ... Formatter, 57 ... Buffer memory, 6
0 ... Decoder part, 62 ... Separator, 63 ... Memory, 6
4 ... Video decoder, 65 ... Sub-picture decoder, 66 ... Video processor, 67 ... Video DAC, 68 ... Audio decoder, 69 ... Audio DAC, 70 ... Volume / file structure area, 72 ... Data area, 76 ... Audio / video data Area, 78 ... Control information, 80 ... Video object set, 94 ... Cell, 96 ... Video object unit, 102 ... Playback control information, 104 ... Recording control information, 110 ... PGC information table, 122 ... Playback management table, 124 ... Playback Interruption information table,

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Hira, 3-3-9 Shimbashi, Minato-ku, Tokyo, Toshiba Abu E Co., Ltd. (56) Reference: Japanese Patent Laid-Open No. 7-226062 ) JP-A-9-135421 (JP, A) JP-A-10-97766 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 5/85 H04N 5/91-5 / 956 G11B 20/10-20/12 G11B 27/00

Claims (8)

(57) [Claims] 1. A data area for recording a video object composed of a video pack storing video data and an audio pack storing audio data and a picture object including a still image, and data of the video object and the picture object. In an optical disc having a control information area for recording control information to be managed, the video object is a set of a plurality of video object units, and each video object unit has a plurality of the video packs and audios. Packs are mixed, the control information includes a plurality of program chain information, each program chain information includes a plurality of cell playback information, and each cell playback information specifies a playback range in the video object. The program chain Information manages the reproduction order of the cell reproduction information, and the control information further includes a first control information block at the beginning and a second picture object that manages a picture object including a still image arranged at a later stage than the first control information block. In the first control information block including the control information block, a program chain number for managing a portion in which a representative image of the video object is recorded is described. The first control information block includes playback interruption information, and this playback interruption information is the program chain number to be specified as the information for interrupting the playback of the video object and starting the next playback. , Including information for identifying the cell
Optical disc . 2. The optical disc according to claim 1, wherein the program chain information includes a flag indicating whether or not the video object reproduced by the program chain information can be erased. 3. An optical disk reproducing apparatus, wherein the optical disk has a data area for recording a video object including a video pack storing video data and an audio pack storing audio data, and a picture object including a still image. , An optical disc having a control information area for recording control information for managing the data of the video object and the picture object.
In the disk , the video object is a set of a plurality of video object units, a plurality of the video packs and audio packs are mixed in each video object unit, and the control information includes a plurality of program chain information, Each program chain information includes a plurality of cell reproduction information, each cell reproduction information specifies a reproduction range in the video object, the program chain information manages a reproduction order of the cell reproduction information, and The control information includes a first control information block at the beginning and a second control information block that manages a picture object including a still image that is arranged at a subsequent stage of the first control information block. The block for managing the part in which a typical image of the video object is recorded The number of the program chain to be executed is described. Furthermore, the first control information block at the beginning includes reproduction interruption information, and this reproduction interruption information indicates that the reproduction of the video object is interrupted. The information for starting the reproduction includes the program chain number to be specified and the cell identification information, and the means for reading the control information, and the reproduction of the video object is restarted based on the read control information. An information reproducing apparatus comprising: 4. The information reproducing apparatus according to claim 3, wherein the program chain information includes a flag indicating whether or not the video object reproduced by the program chain information can be erased. 5. The optical disc reproducing method, the optical disc includes a data area for recording consists of audio packs storing video packs and audio data storing video data the video object and the picture object that contains the still picture , An optical disc having a control information area for recording control information for managing the data of the video object and the picture object.
In the disk , the video object is a set of a plurality of video object units, a plurality of the video packs and audio packs are mixed in each video object unit, and the control information includes a plurality of program chain information, Each program chain information includes a plurality of cell reproduction information, each cell reproduction information specifies a reproduction range in the video object, the program chain information manages a reproduction order of the cell reproduction information, and the control The information includes a first control information block at the beginning and a second control information block that manages a picture object including a still image arranged at a subsequent stage of the first control information block. The block manages a portion in which a representative image of the video object is recorded. The number of the program chain to be written is described. Further, the first control information block at the beginning includes reproduction interruption information, and this reproduction interruption information indicates that the reproduction of the video object is interrupted. The information for starting the reproduction includes the program chain number to be specified and the cell identification information. The control information is read, and the reproduction of the video object is restarted based on the read control information. An information reproducing method characterized by: 6. The information reproducing method according to claim 5, wherein the program chain information includes a flag indicating whether or not the video object reproduced by the program chain information can be erased. 7. An information recording method for recording information on an optical disk, said optical disk, a composed audio packs storing video packs and audio data storing video data the video object and the picture object that contains the still picture An optical disc having a data area for recording and a control information area for recording control information for managing the data of the video object and the picture object.
In the disk , the video object is a set of a plurality of video object units, a plurality of the video packs and the audio packs are mixed in each video object unit, and the control information includes a plurality of program chain information, Each program chain information includes a plurality of cell reproduction information, each cell reproduction information specifies a reproduction range in the video object, the program chain information manages a reproduction order of the cell reproduction information, and The control information includes a first control information block at the beginning and a second control information block that manages a picture object including a still image that is arranged at a subsequent stage of the first control information block. In the block for video, the part in which the typical image of the video object is recorded is managed. The number of the program chain to be processed is described, and further, the first control information block at the beginning includes reproduction interruption information. This reproduction interruption information indicates that the reproduction of the video object is interrupted. Next, as information for starting reproduction, a program chain number to be specified and cell identification information are included, and when the video object is interrupted in the middle of reproduction, An information recording method characterized in that reproduction interruption information is generated and recorded. 8. The information recording method according to claim 7, wherein the program chain information includes a flag indicating whether or not the video object reproduced by the program chain information can be erased.