JP2839879B2 - recoding media - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium such as an optical disk for recording data of different purposes or types, such as compressed moving picture data and audio data.

[0002]

2. Description of the Related Art Conventionally, MPEG (Movi) has been used as a method for compressing (encoding) digital moving image data and audio data.
ng Picture Experts Group) has been internationally standardized. This MPEG compression method is a method of performing variable length compression on digital moving image data (video data) and audio data.

Along with this, a system format system corresponding to the MPEG compression system is also defined as an MPEG system layer.

The MPEG system layer is defined so as to be easy to handle in a communication system, and expresses each data using a reference time so that moving images, audio, and other data can be transferred and reproduced synchronously. A transfer start time and a reproduction start time are defined.

In the MPEG system layer,
Video compression data stream (MPEG video data) and audio compression data stream (MPEG audio data)
Is defined by the stream ID, and other data types are released to the user as private streams.

However, in this case, only two types of data that can be added by the user can be supported, and the expandability is narrowed.

[0007] This has the drawback that various types of data cannot be handled freely, and it is not possible to cope with the multimedia age.

In audio data other than MPEG audio data, when the maximum data length of the packet length is determined, and when the data length of the packet cannot be divided by the number of data of the completed frame data block, the packet length in the packet is However, there is a possibility that the start address of this frame data block may not be known due to the previous data block being included, and that there is a possibility that the reproduction may not be possible when the reproduction is performed in the middle.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to handle a plurality of types of data of various types.

When the data to be handled is linear audio data, playback from the middle can be smoothly performed,
The purpose is to be able to easily detect the usable environment when using computer data.

[0011]

According to the present invention, a large number of data units to be reproduced are recorded, and the data units are arranged at the beginning of the navigation data pack and are arranged next to the navigation data pack. In an optical disc composed of a data pack sequence including video, audio and sub-picture data packs, the video-audio and sub-picture data packs are respectively composed of one pack header and one data packet. And the video packet includes an MPEG
Data of a video stream conforming to the standard is stored, and the navigation data pack includes first and second data packets, wherein the first data packet is a packet header followed by a sub-header. A stream ID area and a first packet data area,
The first packet data area stores first packet data for controlling reproduction of the data pack sequence, and the packet header includes the first packet data defined by the MPEG standard. A stream ID indicating that the packet belongs to the private stream 2 is recorded, and a sub-stream ID for identifying the first packet data is recorded in the sub-stream ID area. The packet comprises a packet header, followed by a sub-stream ID area and a second packet data area, wherein the second packet data area contains a second packet data for searching for the data unit. Is stored in the packet header, and the second packet data is a private packet defined by the MPEG standard. It is recorded stream ID indicating belonging to stream 2, wherein the sub-stream ID region, sub-identifying the second packet data
A stream ID is recorded, and the data packet of the audio pack includes a packet header, a sub-stream ID area and a packet data area following the packet header, and the packet data area includes data other than the MPEG audio stream. Audio packet data belonging to the stream described above, and a stream ID indicating that the packet data belongs to the private stream 1 defined by the MPEG standard is recorded in the packet header. In the sub-stream ID area, a sub-stream ID indicating that the packet data is audio data belonging to a specific audio stream is recorded, and the data packet of the sub-picture pack is a packet header. , Followed by a subst Comprising a chromatography arm ID area and the packet data area, this packet data area, MPE
Sub-picture packet data belonging to a sub-picture stream other than the G video stream is stored, and the packet header indicates that the packet data is data belonging to a private stream 1 defined in the MPEG standard. A stream ID is recorded, and a sub-stream ID indicating that the packet data is sub-video data belonging to a specific data stream is recorded in the sub-stream ID area. An optical disc is provided.

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical disc reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an optical disk reproducing apparatus for reproducing data from an optical disk according to an embodiment of the present invention, and FIG. 2 is a block diagram of a disk drive unit for driving the optical disk shown in FIG. , FIG.
3 shows the structure of the optical disc shown in FIGS. 1 and 2.

[0015] As shown in FIG.
Key operation / display unit 4, monitor unit 6, and speaker unit 8
Is provided. Here, the user operates the key operation / display unit 4
The recorded data is reproduced from the optical disk 10 by operating. The recording data includes video data, sub-video data, and audio data, which are converted into a video signal and an audio signal. The monitor unit 6 displays an image by a video signal, and the speaker unit 8 generates sound by an audio signal.

As is already known, the optical disk 10 has various structures. The optical disk 10 includes, for example, a read-only disk on which data is recorded at a high density, as shown in FIG. As shown in FIG. 3, the optical disc 10 includes a pair of composite layers 18 and an adhesive layer 20 interposed between the composite layers 18. Each of the composite disk layers 18 includes a transparent substrate 14 and a recording layer, that is, a light reflecting layer 16. This disk layer 18 is arranged such that the light reflecting layer 16 is in contact with the surface of the adhesive layer 20. This optical disc 10 has a central hole 22
Around the center hole 22 on both sides thereof, a clamping area 24 for holding the optical disk 10 during rotation is provided. When the disk 10 is loaded in the optical disk device, the spindle of the spindle motor 12 shown in FIG. Is done.

As shown in FIG. 3, the optical disk 10 is provided around the clamping area 24 on both sides thereof.
Has an information area 25 in which information can be recorded. Each information area 25 has an outer peripheral area defined as a lead-out area 26 where information is not normally recorded, and an inner peripheral area adjacent to the clamping area 24 is similarly defined as a lead-in area 27 where information is not normally recorded. And
A space between the lead-out area 26 and the lead-in area 27 is defined as a data recording area 28.

In the recording layer 16 of the information area 25, usually, tracks are continuously formed spirally as areas in which data is recorded, and the continuous tracks are divided into a plurality of physical sectors. The sectors are numbered consecutively, and data is recorded based on the sectors.
The data recording area 28 of the information recording area 25 is an actual data recording area. As described later, reproduction information, video data, sub-picture data, and audio data are similarly pits (that is, changes in physical state). It is recorded as. In the read-only optical disk 10, the transparent substrate 1
4, a pit row is formed in advance by a stamper, a reflective layer is formed by vapor deposition on the surface of the transparent substrate 14 on which the pit row is formed, and the reflective layer is formed as the recording layer 16. In the read-only optical disc 10, no groove is usually provided as a track, and a pit row formed on the surface of the transparent substrate 14 is defined as a track.

As shown in FIG. 1, the optical disk device 12 further includes a disk drive unit 30, a system CPU unit 50, a system ROM / RAM unit 52, a system processor unit 54, a data RAM unit 56, and a video decoder unit 58. , An audio decoder section 60, a sub-picture decoder section 62, and a D / A and data reproducing section 64. The system processor unit 54 includes a system time clock 54A and a register 54B.
The video decoder unit 58, the audio decoder unit 60, and the sub-picture decoder unit 62 similarly include system time clocks (STCs) 58A, 60A, and 62A.

As shown in FIG.
Is a motor drive circuit 11, a spindle motor 12,
An optical head 32 (that is, an optical pickup), a feed motor 33, a focus circuit 36, a feed motor drive circuit 37, a tracking circuit 38, a head amplifier 40, and a servo processing circuit 44 are provided. Optical disk 10
Is mounted on a spindle motor 12 driven by a motor drive circuit 11, and is rotated by the spindle motor 12. An optical head 32 for irradiating the optical disk 10 with a laser beam is placed below the optical disk 10. The optical head 32 is mounted on a guide mechanism (not shown). Feed motor drive circuit 3
7 is provided for supplying a drive signal to the feed motor 33. The motor 33 is driven by a drive signal to move the optical head 32 in the radial direction of the optical disc 10. The optical head 32 includes an objective lens 34 facing the optical disc 10. The objective lens 34 is moved along its optical axis in accordance with the drive signal supplied from the focus circuit 36.

In order to reproduce data from the optical disk 10, the optical head 32 irradiates the optical disk 10 with a laser beam via the objective lens 34. The objective lens 34 is finely moved in the radial direction of the optical disc 10 according to the drive signal supplied from the tracking circuit 38.
The objective lens 34 has a focusing circuit 36 such that its focal point is located on the recording layer 16 of the optical disk 10.
Is finely moved along the optical axis direction in accordance with the drive signal supplied from. As a result, the laser beam forms a minimal beam spot on the spiral track (ie, pit train), and the track is tracked by the light beam spot. The laser beam is reflected from the recording layer 16 and the optical head 3
Returned to 2. The optical head 32 converts the light beam reflected from the optical disk 10 into an electric signal, and the electric signal is supplied from the optical head 32 to the servo processing circuit 44 via the head amplifier 40. In the servo processing circuit 44,
A focus signal, a tracking signal, and a motor control signal are generated from the electric signal, and these signals are respectively referred to as a focus circuit 36, a tracking circuit 38, and a motor drive circuit 11.
To supply.

Therefore, the objective lens 34 is moved along its optical axis and the radial direction of the optical disk 10, its focal point is located on the recording layer 16 of the optical disk 10, and the laser beam focuses the minimum beam spot on the spiral track. Form. Further, the spindle motor 12 is rotated at a predetermined rotation speed by the motor drive circuit 11. as a result,
A pit row on the optical disk 10 is tracked by a light beam, for example, at a constant linear velocity.

A control signal as an access signal is supplied to the servo processing circuit 44 from the system CPU 50 shown in FIG. In response to this control signal, the servo processing circuit 4
4 supplies a head movement signal to a feed motor drive circuit 37, which converts the drive signal to a feed motor 3
3 will be supplied. Therefore, the feed motor 33
Is driven, and the optical head 32 is moved in the radial direction of the optical disk 10. Then, a predetermined sector formed on the recording layer 16 of the optical disk 10 is accessed by the optical head 32. The reproduced data is reproduced from the predetermined sector, supplied from the optical head 32 to the head amplifier 40, amplified by the head amplifier 40, and output from the disk drive unit 30.

The output reproduced data is stored in the system RO.
The data is stored in the data RAM unit 56 by the system processor unit 54 under the control of the system CPU unit 50 controlled by a program recorded in the M and RAM unit 52. The stored reproduction data is processed by the system processor 54 and classified into video data, audio data, and sub-picture data. The video data, audio data, and sub-picture data are
The data is output to the audio decoder section 60 and the sub-picture decoder section 62 and decoded. The decoded video data, audio data, and sub-picture data are converted by a D / A and reproduction processing circuit 64 into a video signal as an analog signal,
The video signal is supplied to the monitor 6 and the audio signal is supplied to the speaker unit 8 while being converted into the audio signal. As a result, an image is displayed on the monitor unit 6 by the video signal and the sub-video signal, and sound is reproduced from the speaker unit 8 by the audio signal.

The detailed operation of the optical disk apparatus shown in FIG. 1 will be described later in more detail with reference to a logical format of the optical disk 10 described below.

The data recording area 28 from the lead-in area 27 to the lead-out area 26 of the optical disk 10 shown in FIG. 1 has a volume and file structure as shown in FIG. This structure complies with a specific standard as a logical format, for example, micro UDF (micr
o UDF) and ISO9660. As described above, the data recording area 28 is physically divided into a plurality of sectors, and the physical sectors are assigned serial numbers. In the following description, the logical address is
It means a logical sector number (LSN) as defined by micro UDF (micro UDF) and ISO9660, and the logical sector is 2048 bytes like the physical sector size, and the logical sector number (LSN) is the physical sector number. Consecutive numbers are added along with the ascending order of the numbers.

As shown in FIG. 4, the volume and file structure has a hierarchical structure, and includes a volume and file structure area 70, a video manager 71, at least one or more video title sets 72, and another recording area 73. doing. These areas are partitioned on the boundaries of logical sectors. Here, one logical sector is defined as 2048 bytes as in the conventional CD. Similarly,
One logical block is also defined as 2048 bytes, so
One logical sector is defined as one logical block.

The file structure area 70 includes a micro UDF
The video manager 71 is stored in the system ROM / RAM unit 52 via the description of this management area defined in ISO9660. The video manager 71 describes information for managing a video title set as described with reference to FIG.
, And a plurality of files 74 starting with. Each video title set 72 stores compressed video data, audio data, sub-picture data, and their reproduction information, as described later, and is similarly composed of a plurality of files 74. Here, the plurality of video title sets 72 are limited to a maximum of 99,
Further, the number of files 74 (File #j to File # j + 9) constituting each video title set 72 is set to a maximum of ten. These files are similarly partitioned at logical sector boundaries.

In another recording area 73, information that can use the above-described video title set 72 is recorded.
The other recording area 73 need not always be provided.

As shown in FIG. 5, the video manager 71
Includes three items each corresponding to each file 74. That is, the video manager 71 includes a video manager information (VMGI) 75 and a video object set (VMGM) for the video manager information menu.
_VOBS) 76 and a backup (VMGI_BUP) 77 of video manager information.
Here, the video manager information (VMGI) 75 and the backup 77 of the video manager information (VMGI)
_BUP) 77 is a required item, and is a video object set (V) for the video manager information menu.
MGM_VOBS) 76 is optional.
This video object set for VMGM (VMGM
_VOBS) 76 stores menu video data, audio data, and sub-picture data relating to the volume of the optical disc managed by the video manager 71.

The volume name of the optical disc, such as the reproduction of video described later by the VMGM video object set (VMGM_VOBS) 76,
A description of the audio and the sub-picture accompanying the volume name display is displayed, and selectable items are displayed in the sub-picture. For example, a video object set for VMGM (VMG
(M_VOBS) 76, the fighting pose of Boxer X is reproduced in the video data along with the fact that the optical disc is video data storing a game up to a certain boxer world champion, that is, the volume name such as the glorious history of Boxer X. At the same time, his theme song is played back as audio, and his chronology is displayed as sub-pictures. In addition, the user is asked whether to select the language of the game narration, such as English or Japanese, as a selection item, and whether to display subtitles in another language in the sub-video, or to select subtitles in any language. The question is asked. This VMGM video object set (V
The MGM_VOBS) 76 allows the user, for example, to prepare to watch the video of the game of Boxer X, using English subtitles in English and Japanese subtitles.

Here, the structure of the video object set (VOBS) 82 will be described with reference to FIG. FIG. 6 shows an example of the video object set (VOBS) 82. This video object set (VO
BS) 82 includes three types of video object sets (VOB) for two menus and a title.
S) There are 76, 95 and 96. That is, the video object set (VOBS) 82 includes the video object set (VTSM) for the menu of the video title set in the video title set (VTS) 72 as described later.
_VOBS) 95 and a video object set (VTSTT_VOBS) 96 for the titles of at least one or more video title sets, and all the video object sets 82 have the same structure except that their uses are different.

As shown in FIG. 6, a video object set (VOBS) 82 is defined as a set of one or more video objects (VOBs) 83, and the video objects 8 in the video object set (VOBS) 82
3 are provided for the same purpose. Normally, a menu video object set (VOBS) 82 is composed of one video object (VOB) 83 and stores data for displaying a plurality of menu screens. On the other hand, the video object set (V
The TSTT_VOBS 82 usually includes a plurality of video objects (VOBs) 83.

Here, a video object (VOB) 8
3 is equivalent to the video data of each game of the boxer X in the case of the above-mentioned boxing video, and reproduces, for example, the eleventh game to challenge the world champion by designating a video object (VOB) in the video. can do. Also, a menu video object set (VTSM_VOB) of the video title set 72 is used.
In S) 95, the menu data of the game of the boxer X is stored, and a specific game, for example, the eleventh game to challenge the world champion can be designated according to the display of the menu. In a normal one-story movie, one video object (VOB) 83 corresponds to one video object set (VOBS) 82, and one video stream corresponds to one video object set (VOB).
S) is completed at 82. In the case of an animation collection or an omnibus movie, a plurality of video streams corresponding to each story are provided in one video object set (VOBS) 82, and each video stream is stored in a corresponding video object. Therefore, the audio stream and sub-picture stream associated with the video stream are also included in each video object (VO).
B) It will be completed in 83.

The video object (VOB) 83 includes
An identification number (IDN # j) is attached, and the video object (VOB) 83 can be specified by the identification number. The video object (VOB) 83 includes one or a plurality of cells 84. A normal video stream is composed of a plurality of cells, but a menu video stream, that is, a video object (VOB) 83 may be composed of one cell 84 in some cases. Similarly, an identification number (C_IDN # j) is assigned to the cell, and the cell 84 is specified by the cell identification number (C_IDN # j).

As shown in FIG. 6, each cell 84 includes one or a plurality of video object units (VOBU) 85, usually a plurality of video object units (VOBU).
85. Here, the video object unit (VOBU) 85 is defined as a pack sequence having one navigation pack (NV pack) 86 at the top. That is, the video object unit (VOB)
U) 85 is defined as a set of all packs recorded from one navigation pack 86 to immediately before the next navigation pack. The playback time of the video object unit (VOBU) corresponds to the playback time of video data composed of one or a plurality of GOPs included in the video object unit (VOBU) as shown in FIG. Is 0.4 seconds or more and 1
It is determined not to be larger than seconds. In MPEG, one GOP is usually 0.5 seconds, and is defined as compressed screen data for reproducing about 15 images during that time.

As shown in FIG. 6, when the video object unit includes video data, a video pack (V pack) 87, a sub-picture pack (SP pack) 90, and an audio pack (A pack) specified by the MPEG standard ) 91 (computer data pack (C pack) 8
A video object (VOBU) 83 is determined based on the playback time of a GOP regardless of the number of GOPs, and a video object (VOBU) 83 is defined regardless of the number of GOPs. , A navigation pack (NV pack) 86 is always arranged. In addition, even in the case of reproduction data of only audio and / or sub-picture data, reproduction data is configured with this video object unit as one unit. That is, even if a video object unit is composed of only the audio pack 91, the audio pack 91 to be reproduced within the reproduction time of the video object unit to which the audio data belongs is also included in the video object unit, like the video object of the video data. Is stored. The procedure of reproducing these packs will be described later in detail together with the navigation pack (NV pack) 86.

Referring again to FIG.
1 will be described. The video manager information 75 placed at the head of the video manager 71 includes a video title set (VTS) such as information for searching for a title and information for reproducing a video manager menu.
Information for managing 72 is described, and at least three tables 78, 79, and 80 are recorded in the order shown in FIG. Each of the tables 78, 79, and 80 matches the boundary of the logical sector. Video manager information management table (VMGI_MAT) 78 which is the first table
Is an essential table that describes the size of the video manager 71, the start address of each piece of information in the video manager 71, the attribute information about the video object set (VMGM_VOBS) 76 for the video manager information menu, and the like.

The title search pointer table (TT) which is the second table of the video manager 71
_SRPT) 79 describes an entry program chain (EPGC) of a video title included in a volume in the optical disc 10 which can be selected in accordance with the input of a key of the apparatus and a title number from the display unit 4.

Here, the program chain 187 is
As shown in FIG. 7, a set of programs 189 for reproducing a story of a certain title is completed, and a movie of one title is completed by continuously reproducing a program chain. Thus, the user can view the movie from a particular scene of the movie by specifying the program 189 in the program chain 187.

The video title set attribute table (VTS_A) which is the third table of the video manager 71
In the (TRT) 80, attribute information defined in the video title set (VTS) 72 in the volume of the optical disc is described. That is, the number of video title sets (VTS) 72 and the video title sets (V
TS) 72, video attributes, for example, video data compression method, etc., audio stream attributes, for example, audio encoding mode, etc., sub-picture attributes, for example, sub-picture display type, etc. Have been described.

The video manager information management table (V
MGI_MAT) 78 and the title search pointer table (TT_SRPT) 79 will be described in detail below with reference to FIGS. 8, 9, 10, and 11.

As shown in FIG. 8, in the video manager information management table (VMGI_MAT) 78, the identifier (VMG_ID) of the video manager 71 and the number of logical blocks (one logical block is 2048 bytes as described above) are stored. Size of management information (VMGI_S
Z), the optical disk, commonly known as a digital versatile disk (digital versatile disk: hereinafter simply referred to as DV)
Called D. ) Standard version number (VER
N) and the category of the video manager 71 (VMG
_CAT).

Here, in the category (VMG_CAT) of the video manager 71, a flag or the like indicating whether or not copying is prohibited in the DVD video directory is described. Also, this table (VMGI_MAT) 78
Contains a volume set identifier (VLMS_ID),
The number of video title sets (VTS_Ns) and the identifier of the supplier of the data recorded on this disc (PVR_I
D), the start address (VNGM_VOBS_SA) of the video object set (VMGM_VOBS) 76 for the video manager menu, the end address (VMGI_MAT_EA) of the video manager information management table (VMGI_MAT) 78, and the start of the title search pointer table (TT_SRPT) 79 The address (TT_SRPT_SA) is described. End address of VMG_MAT78 (VMGI_M
AT_EA) and the start address (TT_SRPT_SA) of the TT_SRPT 79 are described by the number of logical blocks relative to the first logical block.

The table 78 further includes an attribute table (VTS_A) of the video title set (VTS) 72.
TRT) 80 start address (VTS_ATRT_
SA) is the VMGI manager table (VMGI_M
AT) 71, and the video attribute (VMGM_V_ATR) of the video manager menu (VMGM) is described. Furthermore, this table 78 includes the number of audio streams (VM) in the video manager menu (VMGM).
GM_AST_Ns), audio stream attributes (VMGM) in the video manager menu (VMGM)
_AST_ATR), video manager menu (V
MGM) number of sub-video streams (VMGM_SPST)
_Ns) and Video Manager Menu (VMGM)
Attribute of the sub-video stream (VMGM_SPST_AT)
R).

Title search pointer table (TT)
9, the information (TSPTI) of the title search pointer table is described first, and then the number of title search pointers (TT_SRP) required for input numbers 1 to n (n ≦ 99) is required. Are only listed continuously. When only one title of reproduction data, for example, one title of video data is stored in the volume of the optical disc, only one title search pointer (TT_SRP) 93 is described in the table (TT_SRPT) 79.

The title search pointer table information (TSPTI) 92 contains the number of entry program chains (EN_PGC_Ns) as shown in FIG.
In addition, an end address (TT_SRPT_EA) of the title search pointer (TT_SRP) 93 is described. This address (TT_SRPT_EA) is stored in the title search pointer table (TT_SRPT) 79.
Is written in the number of bytes relative to the first byte of As shown in FIG. 11, each title search pointer (T
T_SRP) 93 contains a video title set number (V
TSN), the program chain number (PGCN), and the start address (VTS_
SA) is described.

This title search pointer (TT_SR
P) 93, the video title set (VTS) 72 reproduced according to the contents of the program chain (PG
C) is specified and its video title set 7
2 is specified. Video title set 72
The start address (VTS_SA) describes the title set specified by the video title set number (VTSN) in the number of logical blocks.

Next, the structure of the logical format of the video title set (VTS) 72 shown in FIG. 4 will be described with reference to FIG. Each video title set (V
12, four items 94, 95, 96, and 97 are described in the order of description as shown in FIG. Each video title set (VTS) 72 includes one or more video titles having a common attribute, and management information on the video title 72, for example, information for an entry search point, a video object set Information for reproducing 96, information for reproducing the title set menu (VTSM), and attribute information of the video object set 72 are described in the video title set information (VTSI).

This video title set information (VTS
I) Backup of video title set (VT) 94
S) 72. Video title set information (VTSI) 94 and a backup of this information (VTSI)
_BUP) 97, a video object set (VTSM_VOB) for a video title set menu.
S) 95 and a video object set (VTSTT_VOBS) 96 for a video title set title are arranged. Any video object set (V
TSM_VOBS and VTSTT_VOBS) 95, 9
6 has the structure shown in FIG. 6 as already described.

Video title set information (VTSI) 9
4. Backup of this information (VTSI_BUP) 97
A video object set (VTSTT_VOBS) 96 for a video title set title is an essential item for the video title set 72, and a video object set (VTSTT_VOBS) for a video title set menu.
TSM_VOBS) 95 is an option provided as needed.

Video title set information (VTSI) 9
4, four tables 98, 99, as shown in FIG.
100, 101, four tables 98, 9
9, 100 and 101 are aligned with boundaries between logical sectors. The video title set information management table (VTSI_MAT) 98, which is the first table, is an indispensable table, and includes the size of the video title set (VTS) 72, the start address of each information in the video title set (VTS) 72, and the video. Title set (VTS)
The attribute of a video object set (VOBS) 82 in 72 is described.

The video title set direct access pointer table (VTS_DA) which is the second table
The PT) 99 is an optional table provided as necessary, and is a program chain (PT) included in the video title set 72 which can be selected according to the input of a title number from the key operation / display unit 4 of the apparatus. PGC)
And / or a program (PG).

The third table, a video title set program chain information table (VTS_PGCI)
T) 100 is an essential table that describes VTS program chain information (VTS_PGCI).
A video title set time search map table (VTS_MAPT) 101 which is a fourth table is an optional table provided as needed, and is a map table (VTS_MA) for a predetermined display time.
Information regarding the recording position of video data in each program chain (PGC) of the title set 72 to which the (PT) 101 belongs is described.

Next, the video title information manager table (VTSI_MAT) 98 and the video title set program chain information table (VTS_PGCIT) 100 shown in FIG. 12 are shown in FIGS.
0 will be described.

FIG. 13 shows the description contents of the video title information manager table (VTSI_MAT) 98. In this table (VTIS_MAT) 98,
Video title set identifiers (VTS_I
D), the size of the video title set 72 (VTS_S
Z), the version number of this DVD video standard (VER
N), and the attribute (VTS_CAT) of the title set 72 are described. This table (VTSI_MAT)
In 98, the start address (VTSM_VOBS_SA) of the video object set (VTSM_VOBS) 95 of the VTS menu (VTSM) is described as a relative logical block (RLBN) from the first logical block of the video title set (VTS) 72. Start address (VTSTT_VOB_S) of video object for title in title set (VTS)
A) is described by a logical block (RLBN) relative to the first logical block of the video title set (VTS) 72.

Further, this table (VTSI_MAT)
98 includes a video title set information management table (V
(TI_MAT) 94 end address (VTI_MAT_
EA) is described in the relative number of blocks from the first byte of the table (VTI_MAT), and the video title set direct access pointer table (VTS_DA) is described.
PT) 99 start address (VTS_DAPT_S)
A) is described by the relative number of blocks from the first byte of the video title set information (VTSI) 94.

Further, this table (VTSI_MA
T) 98, the start address (VTS_PGCIT_SA) of the video title set program chain information table (PGCIT) 100 is described by the relative number of blocks from the first byte of the video title set information (VTSI) 94, and the video title set (VTS) The start address (VTS_MAPT_SA) of the time search map (VTS_MAPT) 101 is described as a logical sector relative to the first logical sector of the video title set (VTS) 72. This table (VTSI_
MAT) 98 includes a video title set (VTS) 7
Video object set (VTSM_VOBS) 9 for video title set menu (VTSM) in 2
5 and video title set (VTS) title (V
Video Object Set (VTST) for TSTT
_VOBS) 96 video attributes (VTS_V_ATR)
The number of audio streams (VTS_AST_Ns) of a video object set (VTSTT_VOBS) 96 for the title (VTSTT) of the video title set in the video title set (VTS) 72 is described.

Here, the video attribute (VTS_V_AT)
In R), the compression mode of the video, the frame rate of the TV system, the display aspect ratio when displayed on a display device, and the like are described.

In the table (VTSI_MAT) 98,
Video object set (VTST_VOBS) 9 for title (VTSTT) of video title set (VTS) 72 in video title set (VTS) 72
6 audio stream attribute (VTS_AST_AT)
R). This attribute (VTS_AST_A
TR) describes an audio encoding mode describing how the audio was encoded, how many bits the audio quantization was performed, the number of audio channels, and the like. Further, a table (VTSI_MAT) 98
Describes the number (VTS_SPST_Ns) of sub-video streams of the video object set (VTST_VOBS) 96 for the title (VTSTT) in the video title set (VTS) 72 and the attribute (VTS_SPST_ATR) of each sub-video stream. I have.
The attribute (VTS_SPST_A) of each sub-picture stream
TR) describes the encoding mode of the sub-picture, the display type of the sub-picture, and the like.

This table (VTSI_MAT)
98 has a video title set menu (VTSM)
Audio streams (VTSM_AST_N)
s), audio stream attribute (VTSM_AST_
ATR), the number of sub-picture streams (VTSM_SPST)
_Ns) and the attribute of the sub-picture stream (VTSM_S).
PST_ATR) is described.

The VTS program chain information table (VTS_PGCIT) 100 has a structure as shown in FIG. This information table (VTS_PGC)
IT) 100 includes a VTS program chain (VTS
_PGC) is described (VTS_PGCI), and the first item is a VTS program chain (VT).
S_PGC) information table (VTS_PGCI)
T) 100 information (VTS_PGCIT_I) 102 is provided. This information (VTS_PGCIT_I)
Following this information table (VTS_PGCI)
T) 100 includes this information table (VTS_PGCI).
T) VTS program chain in 100 (VTS_P
VTS_PGCI to search the VTS program chain (VTS_PGC) by the number of GCs (# 1 to #n)
Search pointer (VTS_PGCIT_SRP) 103
Is provided, and finally a VTS program chain (VTS
_PGC) corresponding to each VTS (# 1 to #n).
Information (VTS_PGCI) 104 relating to the program chain (VTS_PGC) is provided.

Information (VTS_PGC) of VTS program chain information table (VTS_PGCIT) 100
IT_I) 102 includes VTS as shown in FIG.
Number of program chains (VTS_PGC) (VTS_PGC)
PGC_Ns) is described as the content, and the end address (VTS_PGCIT_EA) of this table information (VTS_PGCIT_I) 102 is described in this information table (V
TS_PGCIT) 100 is described by the relative number of bytes from the first byte.

The VTS_PGCIT search pointer (VTS_PGCIT_SRP) 103 has an attribute (VTS_PC) of the program chain (VTS_PGC) of the video title set (VTS) 72 as shown in FIG.
GC_CAT) and VTS_PGC information (VTS_PGCI) by the relative number of bytes from the first byte of the VTS_PGC information table (VTS_PGCIT) 100
Is described (VTS_PGCI_SA). Here, the VTS_PGC attribute (VTS_P
GC_CAT) has, for example, an entry program chain (entry PG
C) is described.

Normally, an entry program chain (PG
C) is described before a program chain (PGC) that is not an entry program chain (PGC).

The PGC information (V
The TS_PGCI 104 describes four items as shown in FIG. This PGC information (VTS_PG
The CI) 104 first describes program chain general information (PGC_GI) 105 of essential items, followed by at least three items 106, 107 and 108 which are mandatory only when there is a video object. Have been. That is, as the three items, a program chain program map (PGC_PGMAP) 1
06, the cell reproduction information table (C_PBIT) 107 and the cell position information table (C_POSIT) 108
It is described in the GC information (VTS_PGCI) 104.

Program chain general information (PGC_G
As shown in FIG. 18, I) 105 includes a program chain (PGC) category (PGCI_CAT), program chain (PGC) contents (PGC_CNT), and program chain (PGC) playback time (PGC_CAT).
PB_TIME) is described. The PGC category (PGCI_CAT) describes whether or not copying of the PGC is possible and whether or not the reproduction of the program in the PGC is continuous or random. The content of the PGC (PGC_CNT) describes the configuration of the program chain, that is, the number of programs, the number of cells, and the number of angles in the program chain. PGC playback time (PGC_PB_TIM
E) describes the total reproduction time of the program in the PGC. This playback time describes the playback time of the program when the program in the PGC is played continuously regardless of the playback procedure.

The program chain general information (PG
The C_GI) 105 describes PGC sub-picture stream control (PGC_SPST_CTL), PGC audio stream control (PGC_AST_CTL), and PGC sub-picture palette (PGC_SP_PLT). PGC sub-picture stream control (PGC_SPST_
CTL) describes the number of sub-images that can be used in PGC, and controls PGC audio stream control (PGC_AST).
_CTL) similarly describes the number of audio streams that can be used in PGC. The PGC sub-picture palette (PGC_SP_PLT) describes a set of a predetermined number of color palettes used in all sub-picture streams of this PGC.

Further, PGC general information (PGC_GI) 1
05 includes a cell reproduction information table (C_PBIT) 10
7 is described, and the start address (C_POSIT_SA) of the cell position information table (C_POSIT) 108 is described.
Which start address (C_PBIT_SA and C_PBIT_SA
_POSIT_SA) is also VTS_PGC information (VTS_
PGCI) is described by the number of logical blocks relative to the first byte.

Program chain Program map (P
GC_PGMAP) 106, as shown in FIG.
4 is a map showing a configuration of a program in C. This map (PGC_PGMAP) 106 includes FIG. 19 and FIG.
As shown in 0, the entry cell number (ECELLN), which is the start cell number of the program, is described in ascending order of the cell numbers. Also, program numbers are assigned from 1 in the order of description of entry cell numbers. Therefore, the first entry cell number of this map (PGC_PGMAP) 106 must be # 1.

Cell playback information table (C_PBIT) 1
07 defines the PGC cell playback order. In the cell reproduction information table (C_PBIT) 107, cell reproduction information (C_PBIT) is continuously described as shown in FIG. Basically, the cells are reproduced in the order of their cell numbers. Cell playback information (C_PB
In IT), a cell category (C_CAT) is described as shown in FIG. This cell category (C
_CAT) includes a cell block mode indicating whether a cell is a cell in a cell block, or if the cell is a cell in a cell block, the first cell, the cell is not a part of the block, or A cell block type indicating whether the block is an angle block, a system time clock (ST
An STC discontinuity flag indicating whether the resetting of C) is necessary is described.

The cell category (C_CAT)
Indicates a cell playback mode indicating whether playback is to be performed continuously in a cell or to be stopped in units of video object units (VOBUs) in the cell, whether or not to stop after playback of the cell, or a still time. Cell navigation control is described.

As shown in FIG. 22, the cell reproduction information table (C_PBIT) 107 includes a cell reproduction time (C_PBTM) that describes the total reproduction time of the PGC. If the angle cell block is in the PGC,
The playback time of the angle cell number 1 indicates the playback time of the angle block. Further, the cell playback information table (C_PBIT) 107 contains the head video object unit (VOBU) in the cell by the relative number of logical sectors from the head logical sector of the video object unit (VOBU) 85 in which the cell is recorded. 85 start addresses (C_FVOBU_SA) are described,
The start address (C_LVO) of the last video object unit (VOBU) 85 in the cell is determined by the relative number of logical sectors from the first logical sector of the video object unit (VOBU) 85 in which the cell is recorded.
BU_SA) is described.

Cell position information table (C_POSI) 1
08 specifies the identification number (VOB_ID) of the video object (VOB) of the cell and the identification number (C_ID) of the cell used in the PGC. As shown in FIG. 23, in the cell position information table (C_POSI), the cell position information (C_POSI) corresponding to the cell number described in the cell reproduction information table (C_PBIT) 107 is the same as the cell reproduction information table (C_PBIT). Described in order. The cell position information (C_POSI) includes FIG.
As shown in FIG. 4, the video object unit (V
The identification number (C_VOB_IDN) and cell identification number (C_IDN) of the OBU 85 are described.

As described with reference to FIG.
Is a set of video object units (VOBU) 85, and video object units (VOBU) 8
5 is defined as a pack sequence starting from the navigation (NV) pack 86. Therefore, the start address (C_FVOBU_SA) of the first video object unit (VOBU) 85 in the cell 84 is the NV pack 8
6 represents the start address. As shown in FIG. 25, the NV pack 86 includes a pack header 110, a system header 111, and two packets as navigation data, that is, a reproduction control information (PCI) packet 116 and a data search information (DSI) packet 11.
The number of bytes as shown in FIG. 25 is assigned to each part, and one pack is defined as 2048 bytes corresponding to one logical sector. The NV pack is arranged immediately before the video pack including the first data in the group of picture (GOP). Even when the object unit 85 does not include the video pack 87, the NV pack 86 is arranged at the head of the object unit including the audio pack 91 and / or the sub-picture pack 90. As described above, even when the object unit does not include the video pack, the reproduction time of the object unit is determined based on the unit in which the video is reproduced, as in the case where the object unit includes the video pack 87.

Here, the GOP is defined by the MPEG standard and is defined as a data string constituting a plurality of screens as described above. That is, a GOP corresponds to compressed data, and when this compressed data is expanded, image data of a plurality of frames from which a moving image can be reproduced is reproduced. Pack header 110 and system header 111
Is defined by the MPEG2 system layer, a pack header 110 stores information of a pack start code, a system clock reference (SCR), and a multiplexing rate, and a system header 111 describes a bit rate and a stream ID. ing. Packet headers 112 and 11 of PCI packet 116 and DSI packet 117
4, a packet start code, a packet length, and a stream ID are stored as defined in the MPEG2 system layer.

Other video pack 87, audio pack 91, sub-picture pack 90, computer data pack 8
As shown in FIG. 26, the packet No. 8 similarly includes a pack header 120, a packet header 121, and a packet 122 storing corresponding data as defined by the MPEG2 system layer, and the pack length is set to 2048 bytes. Have been. Each of these packs is aligned with a logical block boundary.

The PCI data (P
CI) 113 is presentation data, that is, navigation data for changing display contents in synchronization with the playback state of video data in the VOB unit (VOBU) 85. That is, the PCI data (PCI) 113 describes PCI general information (PCI_GI) as information of the entire PCI as shown in FIG. P
As shown in FIG. 28, the CI general information (PCI_GI) indicates the number of logical blocks relative to the logical sector of the VOBU 85 in which the PCI 113 is recorded.
3 describes the address (NV_PCK_LBN) of the NV pack (NV_PCK) 86 in which 3 is recorded.
The VOBU is included in the PCI general information (PCI_GI).
85 categories (VOBU_CAT), VOBU85
Start PTS (VOBU_SPTS) and end PT
S (VOBU_EPTS) is described. here,
Start PTS of VOBU85 (VOBU_SPTS)
Indicates a playback start time (start presentation time stamp (SPTS)) of video data in the VOBU 85 including the PCI 113. This playback start time is the first playback start time in the VOBU 85. Normally, the first picture corresponds to the reproduction start time of an I picture (Intra-Picture) in the MPEG standard. End PTS of VOBU85 (VOBU_EP
TS) indicates the playback end time (end presentation time stamp: EPTS) of the VOBU 85 including the PCI 113.

The DSI of the DSI packet 117 shown in FIG.
The SI data (DSI) 115 is a VOB unit (VO
BU) 85 is navigation data for executing the search. The DSI data (DSI) 115 includes FIG.
DSI general information (DSI_GI), VOB
U search information (VOBU_SI) and synchronous reproduction information (SYNCI) are described.

The DSI general information (DSI_GI) describes information on the entire DSI 115. That is, FIG.
0, the DSI general information (DSI_GI) includes
NV pack 86 system time reference value (NV_PC
K_SCR). The system time reference reference value (NV_PCK_SCR) is stored in a system time clock (STC) incorporated in each unit shown in FIG. 1, and the video, audio, and sub-picture packs are used for video, audio, and sub- The video and audio are decoded by the decoders 58, 60, and 62, and are reproduced by the monitor 6 and the speaker 8. In the DSI general information (DSI_GI), the start of the NV pack (NV_PCK) 86 in which the DSI 115 is recorded with the relative logical sector number (RLSN) from the first logical sector of the VOB set (VOBS) 82 in which the DSI 115 is recorded. Address (NV_PCK_LBN) is described, and VO
The address (VOBU_EA) of the last pack in the VOB unit (VOBU) 85 in which the DSI 115 is recorded is described by the relative logical sector number (RLSN) from the head logical sector of the B unit (VOBU).

Further, in the DSI general information (DSI_GI), the VOB unit (V
A V pack (V_PC) in which the last address of the first I picture in this VOBU is recorded by the relative number of logical sectors (RLSN) from the first logical sector of the OBU)
K) VOBU 8 in which the end address (VOBU_IP_EA) of 88 is described and the DSI 115 is recorded
3 (VOBU_IP_IDN) and the corresponding DS
The identification number of the cell in which I115 is recorded (VOBU_
C_IDN).

Search information of VOBU 85 (VOBU_S
In I), information for specifying the head address in the cell is described.

The synchronization information (SYNCI) contains the DSI 11
The address information of the sub-picture and audio data to be reproduced in synchronization with the reproduction start time of the video data of the VOB unit (VOBU) including the address 5 is described. That is, FIG.
, The relative number of logical sectors (R) from the NV pack (NV_PCK) 86 on which the DSI 115 is recorded.
Audio pack (A_PCK) targeted by LSN)
The start address (A_SYNCA) 91 is described. When there are a plurality of (up to 8) audio streams, synchronization information (SYNCI) is described for the number.
Also, the synchronization information (SYNCI) includes a VOB unit (V) including a target sub-picture pack (SP_PCK) 90.
The address (SP_SYNCA) of the NV pack (NV_PCK) 86 of the OBU 85 is described by the relative number of logical sectors (RLSN) from the NV pack (NV_PCK) 86 in which the DSI 115 is recorded. When there are a plurality of sub-video streams (up to 32), the synchronization information (SYNCI) is described by the number.

The pack length of the pack is adjusted to be 2048 bytes (one logical sector). If the pack length is less than 2048 bytes, if the number of bytes is less than 6 bytes, the pack length is adjusted by adding stuffing bytes in the pack header. If the pack length is 7 bytes or more, the stuffing byte is 1 byte. The pack length is adjusted by adding a padding packet corresponding to the number of missing bytes to the packet.

The pack header consists of a 4-byte pack start code (000001BAh) and a 6-byte SCR
(System clock reference, system time reference value), 3-byte multiplexing rate (MUX rate; 04)
68A8h) 1 to 7 stuffing bytes (00h). The packet is composed of 2034 bytes as a reference, and a padding packet for adjusting the pack length (effective data 00h meaningless as data is recorded in each byte unit) is provided in this packet as necessary. It has become.

That is, as shown in FIG. 32, when the data length of a packet is from 2034 bytes to 2028 bytes, stuffing bytes are added (inserted) in the pack header by the number of insufficient bytes.

As shown in FIG. 33, when the data length of a packet is 2027 bytes or less, padding packets for the insufficient number of bytes are added.

For example, packing of video data will be described.

That is, as shown in FIG. 34, when video data having a data length of 2015 bytes is packed,
A comparison is made between the standard number of bytes of one packet (2034 bytes) and the number of bytes of video data (2015 bytes) (20151 bytes) plus the number of bytes (2021 bytes) obtained by adding a 6-byte packet header. Determines that a 13-byte padding packet is added,
A normal 14-byte packed header with a stuffing byte of 1 byte and a 1-byte packed video packet of 2021 bytes
A 2048-byte pack is formed by a 2034-byte packet to which a 3-byte padding packet is added.

As shown in FIG. 35, the data length is 2
When packing 025-byte video data, compare the reference byte number (2034 bytes) of one packet with the byte number (2025 bytes) of the video data plus the byte number (2031 bytes) obtained by adding a 6-byte packet header. Then, by calculating the shortage of 3 bytes by this comparison, 3 bytes are calculated.
A 17-byte pack header in which 3 bytes of stuffing bytes are added in addition to 1 byte of stuffing bytes, and 2 bytes of stuffing bytes are added.
A 2048-byte pack is formed by the 031-byte video packet.

Next, each of the packs will be described in detail.

As shown in FIG. 25, the NV pack 86
It is arranged immediately before the video pack including the head data of one GOP, and has a 14-byte pack header 1
10, 24 byte system header 111, 986
It is composed of a PCI packet 116 of up to bytes and a DSI packet 117 of up to 1024 bytes. P
The CI packet 116 has a packet header 11 of 6 bytes.
2, a 1-byte sub-stream ID 118 and a data area 113 in which 979-byte PCI data can be stored. The DSI packet 117 has a 6-byte packet header 114 and a 1-byte sub-stream ID 1.
It comprises a data area 115 in which DSI data of 19 and 1017 bytes can be stored.

The pack header 110 is, as described above,
4-byte pack start code (0000001BA)
h), 6 bytes of SCR (system clock reference, system time reference value), 3 bytes of multiplexing rate (MUX rate: 0468A8h), and 1 to 7 bytes of stuffing byte (00h).

The system header 111 has a 4-byte system header start code (000001BBh),
It is composed of a byte header length and the like.

Each of the packet headers 112 and 114 has a 3-byte packet start code (000001).
h) 1-byte stream ID (10111111)
b: Private stream 2) 2-byte PES
(Packetized Elementary Stream) It is composed of packet length.

[0096] A code (000000000b) indicating a PCI stream is assigned to the substream ID 118.

[0097] The substream ID 119 is provided with a code (00000001b) indicating a DSI stream.

The video pack 87 is shown in FIG.
As shown in (b), a 14-byte pack header 120
And a video packet comprising a 9-byte packet header 121 and a data area 122 capable of storing video data up to 2025 bytes, or a 19-byte packet header 121 and a data area 122 capable of storing video data up to 2015 bytes. One pack is composed of video packets. Pack header 12
0 has the same configuration as that of the NV pack 86 described above.

When the packet header 121 has 9 bytes, a 3-byte packet start code (000001)
h) 1-byte stream ID (11100000)
b: MPEG video stream), 2-byte PES
(Packetized Elementary Stream) Packet length is composed of 3 bytes of PES data.

When the packet header 121 is 19 bytes, a 5-byte PTS (Presenta
Further, a time stamp (reproduction output time management information) and a 5-byte DTS (Decoding Time Stamp; decoding time management information) are additionally provided. This PTS and DTS
Is described only in a video packet including data at the head of an I picture of a video stream.

The audio pack 91 is a Dolby AC3
In the case of compliant compression-encoded data, as shown in FIG. 37A, a 14-byte pack header 120, a 14-byte packet header 121, a 1-byte substream ID 131, and the number of audio frames in the packet data. And a 2-byte first access unit pointer 1 indicating the start position of the first audio frame in the packet data.
One pack is composed of audio packets including a data area 134 in which audio data of up to 33 and 2016 bytes can be stored. Pack header 12
0 has the same configuration as that of the NV pack 86 described above. If the packet header 121 does not include a PTS, the packet header 121 has a 9-byte configuration, and the data area 134 in which audio data can be stored is expanded to 2021 bytes.

In the case of encoded data of the linear PCM, the audio pack 91 includes one data as shown in FIG.
4-byte pack header 120, 14-byte packet header 121, and 1-byte substream ID 131
And 1 indicating the number of audio frames in the packet data
The number of frames 132 in the byte structure, the first access unit pointer 133 in the 2-byte structure indicating the head position of the audio frame in the packet data, and the audio data information 135 in the 3-byte structure describing the information of the audio data in the packet data
And an audio packet comprising a data area 134 capable of storing audio data up to 2013 bytes.
One pack is composed. The pack header 120 is
The configuration is the same as that of the NV pack 86. If the packet header 121 does not include a PTS, the packet header 121 has a 9-byte configuration, and the data area 134 in which audio data can be stored is expanded to 2018 bytes.

The audio data information of the audio data information describes a frame number, a processing unit in which the length of one data is 16 bits, 20 bits, or 24 bits, a sampling frequency, and the like.

The packet header 121 has a 3-byte packet start code (000001h), a 1-byte stream ID (10111101b: private stream 1), and a 2-byte PES (Packetized Elementar).
y Stream) packet length, contents of PES of 3 bytes, PTS (Presentation Time Stamp; time management information of reproduction output) of 5 bytes.

A sub-stream I added when audio data is compression-coded data conforming to Dolby AC3
In D131, a code (100
00xxxb: xxx is a stream number).

The sub-stream ID 131 given when the audio data is linear PCM includes a linear PCM.
Code indicating the M stream (10100xxxb: xx)
X is a stream number).

One frame of audio data is composed of, for example, a 4-byte frame header and 772-byte audio data of 4 bytes each on the left and right from 0 to 191.

As shown in FIG. 38, the sub-picture pack 90 has a pack header 120 of 14 bytes, a packet header 121 of 14 bytes, and a sub-stream ID of 1 byte.
One pack is composed of sub-picture packets composed of a data area 142 in which sub-picture data of 141 bytes and up to 2019 bytes can be stored. P in the packet header 121
When the TS is not included, the packet header 121 has a 9-byte structure, and the data area 1 in which the sub-picture data can be stored.
42 expands to 2024 bytes. Pack header 120
Has the same configuration as that of the NV pack 86 described above.

The sub-stream ID 141 includes a code (001 ××××× b: ××××××××××××××××
× stream number).

The packet header 121 has a 3-byte packet start code (000001h), a 1-byte stream ID (10111101b: private stream 1), and a 2-byte PES (Packetized Element).
ary Stream) packet length, 3-byte PES data, 5-byte PTS (Presentation Time Stamp;
Playback output time management information). This PTS is described only in the sub-picture packet including the head data of each sub-picture unit.

The computer data pack 88 corresponds to FIG.
As shown in FIG.
4-byte packet header 121, 1-byte substream ID 151, and 2-byte computer environment information 1
One pack is composed of a packet including a data area 153 capable of storing computer data of up to 52 and 2017 bytes. PTS in packet header 121
Is not included, the packet header 121 has a 9-byte configuration, and the data area 153 in which computer data can be stored is expanded to 2022 bytes. Pack header 12
0 has the same configuration as that of the NV pack 86 described above.

As the computer environment information 152, a used CPU and a used OS are described. For example, as shown in FIG. 40, four types can be selected, and the used CPU is “CPU1” and the used OS is “OS1”.
In this case, “0110 (h)” is described. When the used CPU is “CPU1” and the used OS is “OS2”, “011 (h)” is described.
1 (h) ", when the used CPU is" CPU2 "and the used OS is" OS3 "," 1002 (h) "is described, the used CPU is" CPU1 "and the used OS is" OS3 ".
In the case of "3", "0102 (h)" is described.

[0113] A code (11000000b) indicating a computer stream is assigned to the substream ID.

In the packet header 121, a 3-byte packet start code (000001h), a 1-byte stream ID (10111101b: private stream 1), and a 2-byte PES (Packetized Element)
ary Stream) packet length, 3-byte PES data, 5-byte PTS (Presentation Time Stamp;
Playback output time management information). This PTS is described only in a computer data packet including the head data of each computer data stream.

In the SCR described in each pack, the value of the first pack for each video title set is set to 0, and the SCR is increased in ascending order in the recording order on the optical disk 10. As shown in FIG. 41, the stream ID described in the packet header 121 of each pack is “10
"111100" indicates a program stream map, "101111101" indicates a private stream 1, and "10111110" indicates a padding stream (dummy data).
111 "indicates a private stream 2;
“110xxxxxx” indicates an MPEG audio stream (xxxxxx; stream number) and “11
10xxxx ", the MPEG video stream (×
× xxx; stream number), and “1111000
"0" indicates an entitlement (permission) control message, "111110010" indicates an entitlement (permission) management message, and "11110"
010 "indicates a DSM control command,
“11111111” indicates a program stream directory.

The sub-stream IDs 131, 141, 151 described in the packets of the audio pack 91, the sub-picture pack 90, and the computer data pack 88
Corresponds to the private stream 1 and, as shown in FIG. 42, in the case of “10100xxx”, indicates a linear PCM audio stream, and “xxx” is a stream number, and “001xxxxxx” ”Indicates a sub-video stream, and“ xxxxxx ”is a stream number. In the case of“ 11000000 ”, it indicates a computer data stream. In the case of“ 10000xxx ”,
Indicates a Dolby AC3 audio stream and its "x"
“Xx” is the stream number.

The sub-stream ID 11 described in the PCI packet and the DSI packet in the NV pack 87
8 and 119 correspond to the private stream 2, and as shown in FIG.
Indicates “I” stream, and if “00000001”, D
4 shows an SI stream.

Next, pack 9 of linear audio data
A specific example of the first configuration will be described with reference to FIG.

That is, as the stream ID in the packet header 121, “10111101” indicating the private stream 1 is described, and the sub-stream ID
“10100011” indicating a linear PCM audio stream is described as 131, the stream number is described as “3”, and “01DB (h)” is described as the first access unit pointer 133.
In the data area 134 in the packet, the remaining data (472 bytes) of the previous frame and two frame data (1
Frame 772 bytes).

Next, a specific example of the configuration of the computer data pack 88 will be described with reference to FIG.

That is, as the stream ID in the packet header 121, “10111101” indicating the private stream 1 is described, and the sub-stream ID
151 indicates a computer data stream as “1”
1,000,000 ”is described, and the computer environment information 1
The CPU used is “CPU1” and the OS used is “O
"0111 (h)" indicating "S2" is described. Computer data is stored in a data area 153 in the packet.

Next, a specific example of the configuration of the sub-picture data pack 90 will be described with reference to FIG.

That is, “10111101” indicating the private stream 1 is described as the stream ID in the packet header 121, and the sub-stream ID
141 indicates a sub-picture stream.
"1" is described, and "5" is described as the stream number. The sub-picture data of up to 2019 bytes is stored in the data area 142 in the packet.

The system processor unit 54 has a packet transfer processing unit 200 that determines the type of a packet and transfers the data in the packet to each decoder. As shown in FIG. 47, the packet transfer processing unit 200 includes a memory interface unit (memory I / F unit) 2
1, a stuffing length detection unit 202, a pack header end address calculation unit 203, a pack type determination unit 204, a packet data transfer control unit 205, and a decoder interface unit (decoder I / F unit) 206.

The memory I / F unit 201 transfers the pack data from the data RAM unit 56 to the stuffing length detection unit 202, the pack type determination unit 204, the packet data transfer control unit 205, and the decoder I / F unit 2 using a data bus.
06.

The stuffing length detecting section 202 detects how many bytes the stuffing length in the pack header 120 in the pack data supplied from the memory I / F section 201 has. This is output to the end address calculation unit 203.

Pack header end address calculating section 203
Calculates the pack header end address based on the stuffing length supplied from the stuffing length detection unit 202. The calculation result is calculated based on the stuffing length.
4 and the packet data transfer control unit 205.

According to the pack header end address supplied from the pack header end address calculation section 203, the pack type determination section 204 is supplied next to the address in the pack data supplied from the memory I / F section 201a. Depending on the contents of the 4-byte data, video pack 8
7, the audio pack 91, the sub-picture pack 90, the NV pack 86, and the computer data pack 88, and the result of this determination is output to the packet data transfer control unit 205.

That is, when a 1-byte stream ID indicating the private stream 2 is supplied, the stream is identified as the NV pack 86, the 1-byte stream ID indicating the video stream is identified as the video pack 87, and the stream 1 1-byte stream ID
, The audio pack 91, the sub-picture pack 90, or the computer data pack 88.

When the audio pack 91, the sub-picture pack 90 or the computer data pack 88 is determined, the sub-stream ID following the packet header 121 is determined.
Based on 131, 141, and 151, it is determined whether the stream is a Dolby AC3 audio stream, a linear audio stream, a sub-picture stream, or a computer data stream.

For example, as shown in FIG.
In the case of "00xxx"(xxx; stream number), it is determined to be a linear audio stream, and "10000xxx"
× ”(×××; stream number), Dolby AC
3 audio streams, and “001 × XXX ×
In the case of “x” (xxxxxx; stream number), it is determined to be a sub-video stream, and in the case of “11000000”, it is determined to be a computer data stream.

The packet data transfer control unit 205 determines the transfer destination and the packet start address according to the pack header end address supplied from the pack header end address calculation unit 203 and the pack type determination result supplied from the pack type determination unit 204. The address is determined, and the packet length in the packet header 121 of the supplied pack data is further determined. Further, the packet data transfer control unit 2
Reference numeral 05 denotes a signal indicating a transfer destination as a transfer control signal, which is supplied to the decoder I / F unit 206, and a packet end address to a packet end address are supplied to the memory I / F unit 201.

The decoder I / F unit 206 controls the packet header supplied from the memory I / F unit 201 to the packet data transfer control unit 205 in accordance with the transfer control signal supplied from the packet data transfer control unit 205. Video data, audio data, and sub-picture data as packet data including 121 are output to the corresponding decoder units 58, 60, and 62, and navigation data and computer data as packet data are output to the data RAM unit 56. Things.

Next, referring again to FIG. 1, FIGS.
The operation of reproducing movie data from the optical disc 10 having the logical format shown in FIG. In FIG. 1, solid arrows between blocks indicate data buses.
Dashed arrows indicate control buses.

In the optical disk device shown in FIG. 1, when the power is turned on, the system ROM and RAM
From 52, the system CPU unit 50 reads the initial operation program and operates the disk drive unit 30. Therefore, the disk drive unit 30 stores the lead-in area 27
The read operation is started from, and the volume and file structure area 70 that defines the volume and file structure in accordance with ISO-9660 following the lead-in area 27 is read. That is, the system CPU unit 50 controls the volume and file structure area 7 recorded at a predetermined position on the optical disk 10 set in the disk drive unit 30.
In order to read 0, a read command is given to the disk drive unit 30, the contents of the volume and file structure area 70 are read, and are temporarily stored in the data RAM unit 56 via the system processor unit 54. System CPU 50
Extracts information such as the recording position, recording capacity, size, etc. of each file and other management information as information necessary for management via a path table and a directory record stored in the data RAM unit 56, and reads the system ROM & RAM.
The data is transferred to a predetermined location in the unit 52 and stored.

Next, the system CPU unit 50 acquires a video manager 71 composed of a plurality of files starting from the file number 0 with reference to the information on the recording position and the recording capacity of each file from the system ROM & RAM unit 52. That is, the system CPU unit 50 includes a system ROM
A read command is given to the disk drive unit 30 with reference to the information on the recording position and the recording capacity of each file acquired from the RAM unit 52, and the position and the position of a plurality of files constituting the video manager 71 existing on the root directory are determined. The size is acquired, the video manager 71 is read, and stored in the data RAM unit 56 via the system processor unit 54. This video manager 71
And a video manager information management table (VMGI_MAT) 78 is searched. By this search, the video manager menu (VMG
M) for the video object set (VMGM_VO)
BS) 76 start address (VMGM_VOBS_S)
A) is acquired and the video object set (VMGM)
— VOBS) 76 is played. Regarding the reproduction of the menu video object set (VMGM_VOBS) 76, the video object set (VTSM_V) for the title in the video title set (VTS) is used.
OBS), the reproduction procedure is omitted. This video object set (VMGM_VOBS) 7
6 or if there is no video manager menu (VMGM), the volume manager information management table (VMGI_MAT) is searched and the title set search pointer table (TT) is searched.
_SRPT) 79 start address (TT_SRPT_S)
A) is searched.

As a result of this search, the title set search pointer table (TT_SRPT) 79 is transferred to a predetermined location in the system ROM & RAM unit 52 and stored. Next, the system CPU unit 50 obtains the final address of the title search pointer table (TT_SRPT) 79 from the title search pointer table information (TSPTI) 92 and obtains the title search pointer corresponding to the input number from the key operation / display unit 4. (TT_SR
P) 93, the video title set number (VTSN) corresponding to the input number, and the program chain number (PGC)
N) and the start address of the video title set (V
TS_SA) is obtained. If there is only one title set, one title search pointer (TT_SR) regardless of the presence or absence of the input number from the key operation / display unit 4
P) 93 is searched to obtain the start address (VTS_SA) of the title set. The system CPU unit 50 acquires the target title set from the start address (VTS_SA) of the title set.

Note that the system CPU 50 manages the information management table (V) of the video manager information (VMGI) 75.
MGI_MAT) 78 obtains the number of streams of video, audio, and sub-pictures for the video manager menu described in the MGI_MAT 78, and attribute information of each of them.
Each of the video decoder unit 58 and the audio decoder unit 6
0 and a parameter for reproducing the video manager menu are set in the sub-picture decoder unit 62.

Next, from the start address (VTS_SA) of the video title set 72 shown in FIG. 11, video title set information (VTSI) 94 of the title set is obtained as shown in FIG. The video title set information management table (VTSI_MAT) 98 of the video title set information (VTSI) 94 shown in FIG.
Video title set information management table (VT) shown in FIG.
SI_MAT) 98 end address (VTI_MAT_
EA) and the number of streams of audio and sub-picture data (VTS_AST_Ns, VTS_SP)
ST_Ns) and attribute information (VTS_V_ATR, VTS_A_AT) of video, audio, and sub-picture data
R, VTS_SPST_ATR), each unit of the playback apparatus shown in FIG. 1 is set according to its attribute.

When the menu (VTSM) for the video title set (VTS) has a simple structure, the video title set information management table (VTSI_MAT) 98 shown in FIG. Video object set (VTSM_
VOB) 95 start address (VTSM_VOB_
SA) is acquired and its video object set (V
TSM_VOB) 95 displays a menu of a video title set. Referring to this menu, a video object set (VTT_VOBS) 96 for a title (VTST) in a title set (VTS) is simply selected without particularly selecting a program chain (PGC).
Is reproduced, the video object set 96 is reproduced from the start address (VTSTT_VOB_SA) shown in FIG.

When a program chain (PGC) is designated by the key operation / display unit 4, a target program chain is searched for in the following procedure. The search of the program chain is not limited to the program chain for the title in the video title set, and the same procedure is applied to the search of the program chain for the menu even for a relatively complicated menu in which the menu is composed of the program chain. Is adopted. The management table (V) of the video title set information (VTSI) 94
The start address of the program chain information table (VTS_PGCIT) 100 in the video title set (VTS) shown in FIG. 13 described in FIG.
102 is read. This information (VTS_PGCIT
_I) 102, the number of program chains (VTS_PGC_Ns) and the end address (VTS_PGCIT_EA) of the table 100 shown in FIG.

When a program chain number is designated on key operation / display section 4, a VTS_PGCIT search pointer (VTS_PGC) shown in FIG.
IT_SRP) 103 to its program chain category and its search pointer (VTS) shown in FIG.
_PGCIT_SRP) VTS_PG corresponding to 103
The start address of the C information 104 is obtained. The program chain general information (PGC_G) shown in FIG. 17 is determined by the start address (VTS_PGCI_SA).
I) is read. According to the general information (PGC_GI), the program chain (PGC) category and reproduction time (PGC_CAT, PGC_PB_TIME)
Are obtained, and the start addresses (C_PBIT_SA, C_POSIT_SA) of the cell reproduction information table (C_PBIT) and the cell position information table (C_POSIT) 108 described in the general information (PGC_GI) are obtained. Start address (C_PBIT_SA)
From the cell position information (C_POSI) shown in FIG. 23, the video object identifier (C_POSI) shown in FIG.
VOB_IDN) and a cell identification number (C_IDN) are obtained.

The start address (C_POSIT)
_SA) to cell reproduction information (C_PBI) shown in FIG.
2 described in the reproduction information (C_PBI)
2, the start address (C_FVOBU_SA) of the first VOBU 85 and the start address (C_LVOBU_SA) of the last VOBU are obtained, and the target cell is searched. The order of cell playback is
The PGC program map (PGC_P shown in FIG. 17)
The reproduction cells 84 are determined one after another with reference to the program map shown in FIG. The data cells 84 of the program chain determined in this way are successively read from the video object 144 and input to the data RAM unit 56 via the system processor unit 54. The data cell 84 is supplied to the video decoder unit 58, the audio decoder unit 60, and the sub-picture decoder unit 62 based on the reproduction time information, and is decoded.
The signal is converted by the reproduction processing unit 64 and the image is reproduced on the monitor unit 6 and the sound is reproduced from the speaker unit 8.

Further, normal reproduction of video data using the navigation pack 86 will be described in more detail with reference to flowcharts.

In normal reproduction of video data, when normal reproduction is started as shown in FIG. 48, step S1 is performed.
After the start shown in FIG. 1, the video manager information (VMGI) 75 is stored in the system CPU 50 as described above.
And stored in the system ROM / RAM unit 52 (step S12). Similarly, the video title set information (VTSI) 94 of the video title set (VTS) 72 is read based on the video manager information (VMGI) 75, and the video title set menu is displayed in the video object set (V
TSM_VOBS) 95 is displayed on the monitor 6. Based on this display, the user determines the title set 72 to be reproduced and the reproduction conditions as shown in step S13. When the determined title set 72 is selected using the key operation / display unit 4, the program chain information table (VTS_PGCI) shown in FIG.
Data from the T) 100 to the cell reproduction information table (C_PBIT) 107 shown in FIGS. 17, 21 and 22 are read by the system CPU unit 50 and stored in the system ROM / RAM unit 52.

The system CPU 50 proceeds to step S15.
As shown in the figure, a program chain number (V) for starting reproduction in accordance with the reproduction condition input from the key operation / display section 4
TS_PGC_Ns), angle numbers (ANGNs),
An audio stream number and a sub-picture stream number are determined. For example, the boxing world champion round 11 is selected as the title of the program chain, and it is decided to display Japanese subtitles as a sub-picture based on the English narration. In addition, the user performs a selection such as determining an image in which the battle between the two players can always be well viewed as an angle. The determined sub-video number and audio stream number are stored in step S1.
As shown in FIG.
4B is set. Similarly, the reproduction start times of the system time clocks (STC) 54A, 58A, 60A, and 6 of the system processor unit 54, the video decoder unit 58, the audio decoder unit 60, and the sub-picture decoder unit 62.
Set to 2A. Also, the start address and PGC number of the first VOBU in the cell as the start address, that is, the cell number is the ROM / RAM unit 52 for the system.
Is stored in

When the preparation for reading the video title set is completed as shown in step S17, a read command is given from the system CPU unit 50 to the disk drive unit 30, and the optical disk 10 is transferred to the disk drive unit 30 based on the start address described above. Seeking by
The cells related to the designated program chain (PGC) are successively read from the optical disk 10 by the read command, and sent to the data RAM unit 56 via the system CPU unit 50 and the system processing unit 54. As shown in FIG. 6, the transmitted cell data is transferred from the navigation pack 86, which is the head pack of the video object unit (VOBU) 85, to the data RAM unit 5.
6 is stored. Then, the video pack 87 and the audio pack 9 of the video object unit (VOBU)
1, the sub-picture pack 90 and the computer data pack 88 are respectively composed of the video decoder section 58, the audio decoder section 60, the sub-picture decoder section 62 and the data RAM section 56.
, And are decoded by the respective decoders and sent to the D / A and data reproducing unit 64. As a result, the monitor unit 6
A video signal is transmitted to the speaker unit 8 and an audio signal is transmitted to the speaker unit 8, and the display of the video with the sub video is started and the reproduction of the audio is started.

The contents of the computer data pack 88 are stored in a work area by the system CPU unit 50 in the data RAM unit 56.

As a result, the system CPU 50 executes another process by using the program data as the computer data, or executes the system ROM / RAM 52
To start another program in it.

For example, when a Sugoroku game is played in the middle of a video, a simple Sugoroku game program is not recorded in the system ROM / RAM unit 52 but is read out as computer data as described above. It is supposed to be.

Also, by being read as computer data as described above, the system ROM / RA
A predetermined program recorded in the M section 52 is started.

During the reproduction of such video and audio, if there is an interrupt processing from the key operation / display unit 4, the obtained key data is stored in the system RAM / R.
It is stored in the OM unit 52. If there is no key data,
It is checked whether or not there has been a reproduction end interrupt from the drive unit. If there is no interruption to end playback,
The transfer of the navigation pack 86 is awaited. If the transfer of the navigation pack 86 has been completed, the logical sector number (N
V_PCK_LSN) to the current logical block number (NO
WLBN) in the system RAM / ROM unit 52.

When the transfer of the NV pack 86 is completed, it is checked whether it is the last NV pack 86 in the cell. That is, whether or not the last navigation pack 86 in the cell 84 is checked. This check is performed by C_L of the cell reproduction information table (C_PBI) 107 shown in FIG.
Start address of VOBU (C_LVOBU_SA)
And the address of the navigation pack 86 (V_PCK_
LBN). NV
If the pack 86 is final in the cell 84, it is checked whether there has been an angle change. The angle can be changed from the key operation / display unit 4 to the system CPU unit 50.
Is determined based on whether or not an angle change is input. If the angle has not been changed, it is checked whether the cell 84 is the last cell of the program chain (PGC) to which the cell 84 belongs. This check is performed as shown in FIGS.
Is the cell reproduction information table (C_PB).
It is determined based on whether the cell is the last cell of (IT) 107.
That is, it is checked by the number of cells constituting the program chain and the identification number of the reproduced cell.

If the reproduction has been completed, or if there is no program chain to be reproduced next, step S1
As shown in FIG. 8, the general information of the PCI 113 (PCI-G
End PTS (VOBU_EPTS) described in I)
Is referred to, and this end PTS (VOBU_EPTS)
Is equal to the system time clock (STC), the display of the screen of the monitor 6 is stopped as shown in step 19, and a data transfer stop command is given from the system CPU to the disk drive unit 30 as shown in step S20. The data transfer is stopped, and the reproduction operation ends.

Next, the transfer processing of each pack described above will be described.
This will be described with reference to the flowchart shown in FIG.

That is, the system CPU 50 transfers the read command and the logical sector address of the pack to be reproduced to the disk drive 30 (step S31).

Then, the disk drive unit 30 seeks the target address (step S32).

Next, the disk drive unit 30 corrects the error of the data at the target address, and transfers the main data portion in the logical sector data to the system processor unit 54 (step S33).

The system processor 54 stores the read data of the logical sector in the data RAM 56 (step S34).

The system processor unit 54 stores the data RA
The pack headers 110 and 120 are read from the beginning of the data of the logical sector stored in the M section 56, and the SCR
(System time reference value) is saved (step S3)
5).

At this time, since the head of the logical sector coincides with the head of the pack data, the data can be easily extracted.

Then, the system processor unit 54 compares its own PTS with the SCR of each of the stored packs, determines the pack corresponding to the SCR that has reached the PTS, that is, the pack to be reproduced and output, and determines the determined pack data. Is read from the data RAM unit 56 and the packet transfer processing unit 2
At 00, the type of data is determined, and the data is transferred to the decoder units 58, 60, 62 or the data RAM unit 56 according to the determined type (step S36).

The decoders 58, 60, and 62 decode the data in accordance with the respective data formats and the set encoding system, and send the data to the D / A & reproduction processor 64. After the D / A & playback processing section 64 converts the digital signal resulting from the decoding of the video data into an analog signal, it performs frame rate processing, aspect processing, pan scan processing, and the like according to the above set conditions, and sends it to the monitor section 6. Is output. D / A & playback processing unit 64
After the decoding result of the audio data is converted from a digital signal to an analog signal according to the set conditions, the D / A & reproduction processing section 64 performs a mixing process under the set conditions and outputs the result to the speaker section 8. You. The D / A & playback processing unit 64 converts the digital signal resulting from decoding the sub-picture data into an analog signal,
It is output to the monitor 6 (step S37).

When the program data as computer data is supplied, the data RAM unit 56 records the data together with the CPU type and the computer environment type indicating the OS used, and stores the data in the system CPU unit 50 with the computer environment type. Output the data.

Until the reproduction is completed, the above S33 to S37
Is repeated.

Next, the processing of the packet transfer processing section 200 will be described.

That is, the pack data read from the data RAM unit 56 is transferred to the stuffing length detection unit 202, the pack type determination unit 204 via the memory I / F unit 201,
Packet data transfer control unit 205 and decoder I /
It is supplied to the F unit 206 (step S41).

Thus, the stuffing length detecting section 20
2, the stuffing length is detected, and data indicating the stuffing length is output to the pack header end address calculation unit 203 (step S42).

The pack header end address calculation section 203 calculates the pack header end address based on the supplied stuffing length, and this pack header end address is used as the pack type discrimination section 204 and the packet data transfer control section 20.
5 (step S43).

According to the supplied pack header end address, the pack type discriminating section 204 determines the contents of the data of 4 to 6 bytes supplied next to the address of the NV pack 86, the video pack 87, and the audio pack of the Dolby AC3. 91, Linear PCM audio pack 9
1. Sub-picture pack 90, computer data pack 88
Is determined, and the determination result is supplied to the packet data transfer control unit 205 (step S4).
4).

That is, when a 4-byte system header start code is supplied, it is determined that the packet is an NV pack 86, and is determined as a video pack 87 by a 3-byte packet start code and a stream ID indicating a 1-byte video stream. An audio pack 91 of Dolby AC3, comprising a byte packet start code and a private stream 1 as a 1-byte stream ID,
Linear PCM audio pack 91, sub-picture pack 9
0, it is determined to be one of the computer data packs 88.

When the stream ID is the private stream 1, the substream ID (131, 141, 151) following the packet header 121 is "10100
In the case of "xxx", the audio pack is determined to be a linear PCM audio pack, and the stream number is determined based on the "xxx".

When the stream ID is the private stream 1, the substream ID (131, 141, 151) following the packet header 121 is "10000".
In the case of "xxx", the audio pack is determined to be a Dolby AC3 audio pack, and the stream number is determined based on the "xxx".

When the stream ID is the private stream 1, the sub-stream ID (131, 141, 151) following the packet header 121 is "001xx".
In the case of "xxx", it is determined to be a sub-video stream,
The stream number is determined based on “xxxxxx”.

When the stream ID is the private stream 1, the substream ID (131, 141, 151) following the packet header 121 is "11000".
000 "is determined to be a computer data stream.

The linear PCM audio pack 91
Alternatively, when determining the audio pack 91 of Dolby AC3, the offset byte number indicating the head position of the first frame is determined by the 2-byte first access unit pointer 133 following the number 132 of frame headers after the substream ID 131.

The packet data transfer control unit 205
Is the supplied pack type determination result, pack header end address, and first access unit pointer 13
3, the transfer destination and the packet start address are determined, and the packet header 1 of the supplied pack data is further determined.
The packet length in 21 is determined. Thereby, the packet data transfer control unit 205 supplies a signal indicating a transfer destination as a transfer control signal to the decoder I / F unit 206, and supplies a packet end address to a packet end address to the memory I / F unit 201. (Step S4
5).

Therefore, substantially effective packet data is transferred from the memory I / F unit 201 via the data bus.
The data is supplied to the decoder I / F unit 206, and then transferred to each of the decoders 58, 60, 62 or the data RAM unit 56 as a transfer destination according to the type (step S4).
6).

That is, the packet data of video data is transferred to the decoder 58, the packet data of audio data is transferred to the decoder 60, the packet data of sub-picture data is transferred to the decoder 62, and the packet data of computer data is transferred to the data RAM. It is transferred to the unit 56.

At this time, since the above-mentioned pack data has a fixed length, the storage state in the data RAM section 56, that is, the start address is at a constant interval, the head of the pack data in the data RAM section 56 always has an address of the same interval. The pack data is stored, and the management of the pack data does not need to be performed for the address, but only for the pack number.

In the process of determining the type of data, if the data is PCI data or DSI data as NV data indicating the reproduction position of video data, etc.
No data is transferred to the decoder, and this NV data is
The data is stored in the data RAM unit 56. This NV data is
It is referred to by the system CPU unit 50 as needed and used when performing special reproduction of video data. At this time, the PCI data and the DSI data are identified by a substream ID assigned to them.

When reproduction of one cell is completed, cell information to be reproduced next is obtained from cell reproduction order information in the program chain data, and reproduction is continued in the same manner. Next, referring to FIGS. 50 to 55, FIGS.
A description will be given of video data in the logical format shown in FIG. 1, a recording method for reproducing the video data on the optical disk 10, and a recording system to which the recording method is applied.

FIG. 50 shows an encoder system for generating a video file 88 of a title set 84 in which video data is encoded. In the system shown in FIG. 50, video data, audio data,
As a source of the sub-picture data and the computer data, for example, a video tape recorder (VTR) 211,
An audio tape recorder (ATR) 212, a sub-picture source (Subpicture source) 213, and a computer data player 214 are employed. These generate video data, audio data, sub-picture data, and computer data under the control of a system controller (Sys con) 215.
ENC) 216, audio encoder (AENC) 2
17, are supplied to a sub-picture encoder (SPENC) 218 and a computer data encoder (CENC) 219, and similarly under the control of a system controller (Sys con) 215, these encoders 216, 217, 218,
The video data, audio data, sub-picture data and computer data (Comp V
ideo, Comp Audio, Comp Sub-pict, Comp computer)
Are stored in the memories 221, 221, 222, and 223.

The video data, audio data, sub-picture data and computer data (Comp Video, Comp Video)
Audio, Comp Sub-pict, Comp computer) are output to a file formatter (FFMT) 224 by a system controller (Sys con) 215, converted into a file structure of video data of this system as described above, and each data is converted. Management information such as setting conditions and attributes of the system controller (Sys con
) 215 to the memory 226.

Hereinafter, a standard flow of the encoding process in the system controller (Sys con) 215 for creating a file from video data will be described.

Video data and audio data are encoded according to the flow shown in FIG. 51, and encoded video and audio data (Comp Video, Comp Aud
io) data is created. That is, when the encoding process is started, parameters necessary for encoding the video data and the audio data are set as shown in step 50 of FIG. Some of the set parameters are stored in the system controller (Sys con) 215.
And file formatter (FFM
T) 224. As shown in step S51, the video data is pre-encoded using the parameters, and the optimal code amount distribution is calculated. Step S52
As shown in (1), video encoding is performed based on the code amount distribution obtained by pre-encoding. At this time, the encoding of the audio data is performed at the same time. If necessary, as shown in step S53, partial re-encoding of the video data is performed, and the re-encoded portion of the video data is replaced. Through this series of steps, video data and audio data are encoded.

As shown in steps S54 and S55, the sub-picture data is encoded to create encoded sub-picture data (Comp Sub-pict). That is, parameters necessary for encoding the sub-picture data are set in the same manner. Some of the parameters set as shown in step S54 are stored in the system controller (Sys con
) 215 and stored in a file formatter (FFM).
T) 224. Sub-picture data is encoded based on these parameters. By this processing, the sub-picture data is encoded.

Also, as shown in steps S56 and S57, the computer data is encoded to create encoded computer data (Comp computer). That is, parameters necessary for encoding data are set in the same manner. Some of the parameters set as shown in step S56 are changed to the system controller (Sy
s con) 215 and the file formatter (F
FMT) 224. The data is encoded by the computer based on this parameter. This process encodes the computer data.

In accordance with the flow shown in FIG. 52, encoded video data, audio data, sub-picture data, and computer data (Com Video, Comp Audio,
CompSub-pict and Comp computer) are combined and converted into a title set structure of video data as described with reference to FIGS. That is, step S61
As shown in (1), a cell as a minimum unit of video data is set, and cell reproduction information (C_PBI) relating to the cell is created. Next, as shown in step S62, the configuration of the cells constituting the program chain, video, sub-picture, audio attributes, and the like are set (for some of these attribute information, information obtained at the time of each data encoding is used). 12), a video title set information management table information (VTSI_MAT) 98 including a program chain information and a video title set time search map table (VTS_MAPT) 10 as shown in FIG.
1 is created. At this time, the video title set direct access pointer table (VTS_
DAPT) is also created. Next, as shown in step S63, the encoded video data, audio data, sub-picture data, and computer data (Com Vid.
EO, Comp Audio, Comp Sub-pict, Comp computer) are subdivided into fixed packs, and NVs are placed at the beginning of each VOBU unit so that they can be played back in the order of the time code of each data.
Each data cell is arranged while the pack 86 is arranged to form a video object (VOB) composed of a plurality of cells as shown in FIG. 6, and a set of the video objects is formatted into a title set structure.

In the flow shown in FIG. 52, the program chain information uses the database of the system controller (Sys con) 215 in the process of step S62, or re-inputs data as necessary. And is described as program chain information (PGI).

FIG. 53 shows a disk formatter system for recording a title set formatted as described above on an optical disk. As shown in FIG. 53, in the disk formatter system, these file data are stored in a volume formatter (VF) from memories 230 and 232 in which the created title sets are stored.
MT) 236. The volume formatter (VFMT) 236 extracts management information from the title sets 84 and 86 to create a video manager 71, and creates logical data in a state to be recorded on the disc 10 in the arrangement order shown in FIG. Data for error correction is added to the logical data created by the volume formatter (VFMT) 236 to the disk formatter (DFM).
T) 238 and reconverted to physical data to be recorded on the disc. In the modulator 240, the physical data generated by the disk formatter (DFMT) 238 is converted into recording data to be actually recorded on the disk, and the modulated recording data is converted by the recorder 242 into the disk 10. Will be recorded.

A standard flow for creating the above-described disc will be described with reference to FIGS. FIG.
4 shows a flow for creating logical data to be recorded on the disk 10. That is, step S80
As shown by, parameter data such as the number of video data files, the arrangement order, and the size of each video data file are set first. Next, a video manager 71 is created from the parameters set as shown in step S81 and the video title set information 81 of each video title set 72. Thereafter, as shown in step S82, the data is arranged in the order of the video manager 71 and the video title set 72 along the corresponding logical block number, and logical data to be recorded on the disk 10 is created.

Thereafter, a flow for creating physical data to be recorded on a disc as shown in FIG. 55 is executed. That is, as shown in step S83, the logical data is divided into a fixed number of bytes, and error correction data is generated. Next, as shown in step S84, the logical data divided into a fixed number of bytes and the generated data for error correction are combined to create a physical sector. Thereafter, as shown in step S85, physical data is created by combining the physical sectors. As described above, modulation processing based on a certain rule is performed on the physical data generated by the flow shown in FIG. 55 to create recording data. Thereafter, the recording data is recorded on the disk 10.

The data structure described above can be applied not only to a case where the data is recorded on a recording medium such as an optical disk and distributed to a user for reproduction, but also to a communication system as shown in FIG. That is, according to the procedure shown in FIGS.
An optical disk 10 storing a video manager 71, a video title set 72, and the like as shown in FIG. 1 is loaded into a reproducing apparatus 300, and encoded data is digitally extracted from a system CPU 50 of the reproducing apparatus. The signal may be transmitted to the user or the cable subscriber side by radio wave or cable by 310. Also, data encoded by a provider such as a broadcasting station by the encoding system 320 shown in FIGS. 50 and 53 is created, and this encoded data is similarly transmitted to the modulator / transmitter 3.
10 may be sent to the user or cable subscriber side by radio wave or cable. In such a communication system, the information of the video manager 71 is first modulated by the modulator / transmitter 310 or directly distributed to the user free of charge, and when the user is interested in the title, the user or the subscriber is notified. The title set 72 is transmitted to the user by the modulator / transmitter 310 via radio waves or a cable in response to a request from the user. In the transfer of the title, first, the video title set information 94 is transmitted under the control of the video manager 71, and then the title video object 95 in the video title set reproduced by the title set information 94 is transferred. At this time, if necessary, a video object 95 for a video title set menu is also sent. The transmitted data is received by the receiver / demodulator 400 on the user side, processed as encoded data by the system CPU unit 50 of the reproducing apparatus on the user or subscriber side shown in FIG. Is played.

In the transfer of the video title set 72, the video object sets 95 and 96 are transferred in units of the video object unit 85 shown in FIG. In the video object unit 85, an NV pack 86 in which video reproduction and search information is stored is arranged at the head thereof. Moreover, this NV pack 86
Contains the addresses of the video object units to be reproduced before and after the video object unit 85 to which the NV pack 86 belongs. Therefore, during the transfer of the video object unit 85, the video object unit 85 Even if the video object unit 85 is missing, the user can reliably reproduce the video data by requesting the retransfer of the missing video object unit 85. Further, even if the transfer is not performed in the playback order of the video object units, the system ROM / RAM unit 52 on the user side holds the correct program chain playback information, and refers to the address data of the NV pack 86 to perform the playback order. Can be instructed by the system CPU unit 50.

In the above description, the video object unit has been described as a data string including video, audio, sub-picture and computer data. However, it is sufficient that any video, audio, sub-picture and computer data are included. The audio pack only or the sub-picture pack only may be constituted only by the computer data pack.

As described above, data is recorded in the data area of the disc in a hierarchical structure of program chains, programs, cells, and packs, and each pack records a pack header and a data stream for identifying each pack. The packet includes a packet header having at least data indicating a private stream, data indicating a type of the private stream, and packet data corresponding to this type.

As a result, a plurality of types of data of various types can be handled.

When the data to be handled is Dolby AC3 audio data or linear PCM audio data, reproduction from the middle can be smoothly performed, and when the data is computer data, the usable environment can be easily detected.

In the above-described embodiment, a high-density recording type optical disk has been described as a recording medium.
The present invention provides a storage medium other than an optical disc, for example,
The present invention can also be applied to a magnetic disk or another storage medium capable of physically recording at high density.

[0201]

As described above in detail, according to the present invention, a plurality of types of various types of data can be handled.

When the data to be handled is linear audio data, playback from the middle can be performed smoothly,
In the case of computer data, the usable environment can be easily detected.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an optical disk device according to one embodiment of the present invention.

FIG. 2 is a block diagram showing details of a mechanical unit of the disk drive device shown in FIG. 1;

FIG. 3 is an exemplary perspective view schematically showing the structure of an optical disk loaded in the disk drive device shown in FIG. 1;

FIG. 4 is a diagram showing a structure of a logical format of the optical disc shown in FIG. 3;

FIG. 5 is a diagram showing a structure of a video manager shown in FIG. 4;

FIG. 6 shows a video object set (VO) shown in FIG.
2 is an example showing the structure of BS).

FIG. 7 is an explanatory view showing the structure of the video object unit shown in FIG. 6;

FIG. 8 is a video manager (VMGI) shown in FIG. 5;
Video manager information management table (VMGI_M)
FIG. 4 is a diagram showing parameters and contents of AT).

FIG. 9 is a video manager (VMGI) shown in FIG. 5;
The figure which shows the structure of the title search pointer table (TSPT) in the inside.

10 is a view showing parameters and contents of information (TSPTI) of a title search pointer table (TSPT) of the title search pointer table (TSPT) shown in FIG. 9;

11 is a diagram showing parameters and contents of a title search pointer (TT_SRP) corresponding to an input number of the title search pointer table (TSPT) shown in FIG.

FIG. 12 is a diagram showing the structure of the video title set shown in FIG.

FIG. 13 is a view showing parameters and contents of a video title set information management table (VTSI_MAT) of the video title set information (VTSI) shown in FIG. 12;

14 is a diagram showing the structure of a table (VTS_PGCIT) of video title set program chain information of the video title set information (VTSI) shown in FIG.

15 is a view showing parameters and contents of information (VTS_PGCITI) of a table (VTS_PGCIT) of video title set program chain information shown in FIG. 14;

16 is a search pointer (VTS) corresponding to the program chain in the video title set program chain information table (VTS_PGCIT) shown in FIG.
_PGCIT_SRP) showing parameters and contents.

FIG. 17 is a diagram showing a structure of program chain information (VTS_PGCI) for a video title set corresponding to the program chain of the video title set program chain information table (VTS_PGCIT) shown in FIG. 14;

FIG. 18 shows the program chain information (V
TS_PGCI) General information of program chain (P
The figure which shows the parameter and content of (GC_GI).

FIG. 19 shows the program chain information (V) shown in FIG.
TS_PGCI) Program chain map (PG
FIG. 3 is a diagram showing the structure of (C_PGMAP).

20 is a view showing parameters and contents of an entry cell number (ECELLN) for a program described in a map (PGC_PGMAP) of the program chain shown in FIG. 19;

FIG. 21 shows the program chain information (V) shown in FIG.
TS_PGCI) cell reproduction information table (C_PBI)
The figure which shows the structure of T).

FIG. 22 shows a cell reproduction information table (C_
The figure which shows the parameter and content of (PBIT).

FIG. 23 shows the program chain information (V
The figure which shows the structure of cell position information (C_POSI) of TS_PGCI.

24 is a diagram showing the cell position information (C_POS) shown in FIG.
The figure which shows the parameter and content of I).

FIG. 25 is a view showing the structure of the navigation pack shown in FIG. 6;

FIG. 26 is a diagram showing the structure of a video, audio, and sub-picture pack shown in FIG. 6;

FIG. 27 is a view showing parameters and contents of playback control information (PCI) of the navigation pack shown in FIG. 26;

28 is a view showing parameters and contents of general information (PCI_GI) in the reproduction control information (PCI) shown in FIG. 27.

FIG. 29 is a view showing parameters and contents of disc search information (DSI) of the navigation pack shown in FIG. 26;

30 is a diagram showing disc search information (DS) shown in FIG. 29.
The figure which shows the parameter and content of DSI general information (DSI_GI) of I).

FIG. 31 shows a video object (VO) shown in FIG. 29;
FIG. 6B is a diagram showing parameters and contents of synchronous reproduction information (SYNCI) of FIG.

FIG. 32 is a view for explaining an example of adjustment when the adjustment data length is 7 bytes or more.

FIG. 33 is a view for explaining an example of adjustment when the adjustment data length is 6 bytes or less.

FIG. 34 is a view for explaining the configuration of a pack.

FIG. 35 is a view for explaining the configuration of a pack.

FIG. 36 is a view for explaining the configuration of a video pack.

FIG. 37 is a view for explaining the configuration of an audio pack;

FIG. 38 is a view for explaining the configuration of a sub-picture pack.

FIG. 39 is an exemplary view for explaining a configuration of a pack of computer data;

FIG. 40 is a view for explaining the environment type of computer data.

FIG. 41 is a view for explaining the configuration of a stream ID.

FIG. 42 is an exemplary view for explaining the contents of a sub-stream ID for private stream 1;

FIG. 43 is an exemplary view for explaining the contents of a sub-stream ID for a private stream 2;

FIG. 44 is a view for explaining the configuration of an audio pack and a packet;

FIG. 45 is a view for explaining the configuration of a pack and a packet of computer data.

FIG. 46 is an exemplary view for explaining the configuration of a sub-picture pack and a packet;

FIG. 47 is a block diagram illustrating the configuration of a packet transfer processing unit.

FIG. 48 is a flowchart showing a procedure of a reproduction process of video data, audio data, sub-picture data, and computer data.

FIG. 49 is a flowchart illustrating a packet transfer process.

FIG. 50 is a block diagram showing an encoder system that generates video files by encoding video data.

FIG. 51 is a flowchart showing an encoding process shown in FIG. 50;

FIG. 52 is a flowchart of creating a video data file by combining video data, audio data, and sub-video data encoded in the flow shown in FIG. 51;

FIG. 53 is a block diagram showing a system of a disk formatter for recording a formatted video file on an optical disk.

FIG. 54 is a flowchart for creating logical data to be recorded on a disk in the disk formatter shown in FIG. 53;

FIG. 55 is a flowchart for creating physical data to be recorded on a disk from logical data.

FIG. 56 is an exemplary diagram showing a system for transferring the video title set shown in FIG. 4 via a communication system;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Optical disk 71 ... Management area 72 ... Data area 84 ... Cell 86 ... Navigation pack 87 ... Video pack 88 ... Computer data pack 90 ... Sub-picture pack 91 ... Audio pack 120 ... Pack header 121 ... Packet header 131, 141, 151 ... Substream ID 133 ... Start address of frame data 187 ... Program chain 189 ... Program

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuhiko Hirara 3-3-9, Shimbashi, Minato-ku, Tokyo Inside Toshiba AV EE Co., Ltd. (72) Inventor Tomoaki Kurano 70 Yanagicho, Yuki-ku, Kawasaki City, Kanagawa Prefecture Address Toshiba Yanagimachi Plant Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) H04N 5/92 G11B 20/12 103

Claims (4)

(57) [Claims] 1. A plurality of data units to be reproduced are recorded, and the data units are arranged at the head of a navigation data pack and a video data, an audio data and a sub-picture data arranged subsequently thereto. An optical disk comprising a data pack sequence including packs, wherein the video / audio and sub-picture data packs are:
Each video packet is composed of one pack header and one data packet.
The data of a video stream conforming to the G standard is stored, and the navigation data pack includes first and second navigation data packs.
Wherein the first data packet comprises a packet header, followed by a sub-stream ID area and a first packet data area, wherein the first packet data area comprises: First packet data for controlling the reproduction of the data pack sequence is stored, and the packet header indicates that the first packet data belongs to the private stream 2 defined by the MPEG standard. A stream ID is recorded, and the sub-stream ID area includes a sub-data for identifying the first packet data.
A stream ID is recorded. The second data packet includes a packet header, a sub-stream ID area and a second packet data area following the packet header, and the second packet data area includes the packet header. A second packet data for searching a data unit is stored, and a stream ID indicating that the second packet data belongs to a private stream 2 defined by the MPEG standard is recorded in the packet header. And the sub-stream ID area includes:
A sub stream ID for identifying the second packet data is recorded, and the data packet of the audio pack includes a packet header, a sub stream ID area following the packet header, and a packet data area. The packet data area stores audio packet data belonging to a stream other than the MPEG audio stream, and the packet header contains the packet data belonging to the private stream 1 defined by the MPEG standard. Is recorded, and in the sub-stream ID area, a sub-stream ID indicating that the packet data is audio data belonging to a specific audio stream is recorded, The data path of the sub-picture pack The packet comprises a packet header, a sub-stream ID area and a packet data area following the packet header, and the packet data area contains sub-picture packet data belonging to a sub-picture stream other than the MPEG video stream. The packet header is stored in the packet header.
A stream ID indicating that the data belongs to the private stream 1 defined in the standard is recorded, and the sub-stream ID area indicates that the packet data is sub-picture data belonging to a specific data stream. An optical disc characterized by recording a sub-stream ID indicating the following. 2. The video / audio / sub-picture pack has the same pack length defined in one logical sector,
2. The optical disk according to claim 1, wherein one logical sector is defined to be equal to one physical sector of 2048 bytes. 3. If the pack length of the pack is less than 2048 bytes, and if the number of bytes less than 648 bytes is less than 6 bytes, stuffing bytes are added to the pack header to make the pack length of the pack 2048 bytes. If the number of bytes is less than 7 bytes, one stuffing byte is added to the pack header, and a padding packet corresponding to the number of missing bytes is added to the packet. 3. The optical disk according to claim 2, wherein the pack length of the pack is adjusted to 2048 bytes. 4. The sub-stream ID area of the data packet of the sub-picture and the audio pack includes a stream number following the sub-stream ID. Optical disk.