JPH08289248A - Recording medium, recording system for data on the same and its recorder and reproducing method for data from the same and its reproducing device - Google Patents

Abstract

PURPOSE: To efficiently reproduce packed data by recording data on a data area in hierarchical structure consisting of plural packs. comprising each pack with fixed quantity of data consisting variable length data and data for refilling and setting the data quantity of each pack at the one of integer times the data quantity of a sector that is the recording unit of the data in a disk. CONSTITUTION: The data recording area 28 from the read-in area 27 to the read-out area 26 of an optical disk is provided with volume structure as a logical format, and the volume structure consists of a volume managing information area 70 of hierarchical structure and a file area 80. The volume managing information area 70 is equivalent to a part from logical block numbers 0 to 23, and a system area 72 and a volume managing area 74 are allocated to it. Files 76, 78 with file numbers 0 to 99 designated by the logical block numbers after a logical block number 24 are arranged in the file area 80.

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 types and types such as compressed moving image data and audio data, a method of recording data on this recording medium, and a recording medium therefor. The present invention relates to a recording device for recording data, a method for reproducing data from the recording medium, and a reproducing device for reproducing data from the recording medium.

[0002]

2. Description of the Related Art Conventionally, as a method for compressing (encoding) digital moving image data and audio data, MPEG (Movi
The ng Picture Experts Group) system has come to be internationally standardized. This MPEG compression method is a method for variable length compression of 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. This MPEG system layer is specified so that it can be easily handled in a communication system, and a transfer start time expressed by using a reference time for each data so that moving data, audio, and other data can be transferred and reproduced in synchronization. And the playback start time is specified.

Further, in the MPEG system layer,
All data is represented as one pack, and basic processing is performed for each pack. Moreover, the pack length of each pack is not specified.

In accordance with the MPEG system layer,
In order to record on an optical disc as a recording medium, since it is specified so that it can be easily handled by a communication system, some parts are not sufficiently specified.

Among them, especially, the following problems occur. In an optical disc, the minimum recording unit for recording data is one logical sector, and the disc drive is
Data reproduction processing is performed in units of this logical sector.

Therefore, when 1-pack data is recorded on the optical disc, the 1-pack length may not match the logical sector length. In such a case, since the beginning of the pack and the beginning of the logical sector do not match, the disk drive fetches the data of the logical sector at the target address during data search, etc. Is inefficient because it has to throw away the data of or the search for the beginning of the packed data.

Further, even when a read error occurs, it is necessary to fetch the data of the logical sector in which the target pack data is recorded and discard the data up to the beginning of the target pack data in it. It is inefficient because the beginning of the pack data must be searched.

[0009]

SUMMARY OF THE INVENTION The present invention is intended to solve such problems, and it is an object of the present invention to efficiently reproduce pack data.

[0010]

The recording medium of the present invention comprises:
A management area is formed in a partial area of the disc on which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disc, and a plurality of files are recorded in the data area. Data is recorded in each file in a hierarchical structure in which one file is composed of a plurality of programs, one program is composed of a plurality of packs, and each pack is a fixed length composed of variable length data and supplementary data. The data amount of each pack is an integer multiple of the data amount of a sector that is a recording unit of data on the disc, and the management area has control data that represents a file array of the data area. Management data for managing connections to programs and packs is recorded.

In the recording medium of the present invention, a management area is formed in a partial area of a disk in which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. , A plurality of files are recorded, and data is recorded in each file in a hierarchical structure in which one file is composed of a plurality of programs, one program is composed of a plurality of packs, and each pack is of a variable length. It is composed of a fixed amount of data consisting of data and supplementary data, the amount of data of each pack is the same as the amount of data of a sector which is a recording unit of the data of the disc, and the management area has the above-mentioned data. The control data representing the file array of the area, the program, and the management data managing the connection to the pack are recorded.

In the recording medium of the present invention, a management area is formed in a partial area of a disk where a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. , Data is recorded in a plurality of divided sequences, each sequence is composed of a plurality of programs, one program is composed of a plurality of cells, and one cell is recorded in a hierarchical structure composed of a plurality of packs. Each pack is composed of a fixed amount of data consisting of variable length data and supplementary data, and the amount of data of each pack is an integral multiple of the amount of data of a sector which is a recording unit of the data of the disc, and In the management area, the sequence of the above data area, program, cell,
The management data that manages the connection to the pack is recorded.

In the recording medium of the present invention, a management area is formed in a partial area of a disk in which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. , Data is recorded in a plurality of divided sequences, each sequence is composed of a plurality of programs, one program is composed of a plurality of cells, and one cell is recorded in a hierarchical structure composed of a plurality of packs. Each pack is composed of a fixed amount of data consisting of variable length data and supplementary data, and the amount of data of each pack is the same as the amount of data of a sector which is a recording unit of the data of the disc, and In the management area, the sequence of the above data area, program, cell,
The management data that manages the connection to the pack is recorded.

In the recording medium of the present invention, a management area and a data area are formed in a partial area of a disk in which a predetermined amount of data is recorded in sector units, and a plurality of data areas are formed in the data area. Programs are recorded, one program is recorded in a hierarchical structure composed of a plurality of packs, and each pack is composed of a fixed amount of data consisting of variable-length data and supplementary data. Is an integer multiple of the data amount of a sector which is a recording unit of data on the disc, and management data for managing the connection between each program and the pack in the data area is recorded in the management area.

In the recording medium of the present invention, a management area and a data area are formed in a partial area of the disc on which a predetermined amount of data is recorded in sector units, and a plurality of data areas are formed in the data area. Programs are recorded, one program is recorded in a hierarchical structure composed of a plurality of packs, and each pack is composed of a fixed amount of data consisting of variable-length data and supplementary data. Has the same data amount as that of a sector which is a recording unit of data on the disc, and management data for managing the connection between each program and the pack of the data region is recorded in the management region.

In the recording apparatus of the present invention, a management area is formed in a part of the area and a data area is formed in another area, and the data is recorded in the data area in a plurality of sequences.
Each sequence consists of multiple programs, 1
One program is composed of a plurality of cells, and one cell is recorded in a recording medium having a hierarchical structure composed of a plurality of packs.
When a predetermined amount of data is recorded in sector units, receiving means for receiving variable-length data, the amount of variable-length data received by this receiving means, and the sector which is the recording unit of data on the recording medium Judging means for judging the data quantity of the supplementary data based on the difference from the data quantity, forming means for forming a pack by the supplementary data of the data quantity judged by this judging means and the variable length data, and this forming And a recording means for recording the pack formed by the means in the sector of the recording medium.

In the reproducing apparatus of the present invention, the management area is formed in a part of the area and the data area is formed in the other area, and the data is divided into a plurality of sequences and recorded in the data area.
Each sequence consists of multiple programs, 1
One program is composed of a plurality of cells, one cell is recorded in a hierarchical structure composed of a plurality of packs, and each of the main video data, audio data, sub-picture data, and disk search information data is stored in the pack.
In reading a recording medium that has data indicating a data type and data indicating a data length, and in which a predetermined amount of data is recorded in sector units, reading for reading pack data in sector units of the recording medium Means for determining whether the data type is main video data, audio data, sub-video data, or disc search information data based on the pack data read by the reading means, and a data length, and the reading means. Extracting means for extracting data having the data length judged by the judging means in the pack data read by the demodulating means, and demodulating the data extracted by the extracting means according to the data type judged by the judging means. Demodulating means and output means for reproducing and outputting the data demodulated by the demodulating means Et al constructed.

[0018]

According to the present invention, a management area is formed in a partial area of a disk in which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. Files are recorded, and data is recorded in each file in a hierarchical structure in which one file is composed of a plurality of programs, and one program is composed of a plurality of packs, and each pack is supplemented with variable-length data and supplementary data. The data amount of each pack is an integral multiple of the data amount of a sector, which is a recording unit of the data of the disc, and the management area includes the data area of the data area. The control data that represents the file array, the program, and the management data that manages the connection to the pack are recorded.

According to the present invention, a management area is formed in a partial area of a disk in which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. Data is stored in the data area. It is recorded separately in multiple sequences, each sequence consisting of multiple programs, one program consisting of multiple cells,
One cell is recorded in a hierarchical structure consisting of a plurality of packs, each pack is composed of a fixed amount of data of variable length data and supplementary data, and the data amount of each pack is the data of the disc. Is an integral multiple of the data amount of a sector, which is a recording unit, and management data is recorded in the management area for managing the connection of the sequence, program, cell, and pack of the data area.

According to the present invention, a management area is formed in a part of the area and a data area is formed in the other area, and the data is recorded in a plurality of sequences in the data area, and each sequence is composed of a plurality of programs. In a recording medium in which one program is composed of a plurality of cells and one cell is composed of a plurality of packs, and a predetermined amount of data is recorded on a sector-by-sector basis, variable length data is recorded. Receiving, judging the data amount of the replenishment data based on the difference between the data amount of the received variable length data and the data amount of the sector which is the recording unit of the data of the recording medium, and replenishing the judged data amount A pack is formed from the data for use in recording and the variable-length data, and the formed pack is recorded in the sector of the recording medium.

In the reproducing apparatus of the present invention, a management area is formed in a part of the area and a data area is formed in the other area, and the data is recorded in the data area in a plurality of sequences.
Each sequence consists of multiple programs, 1
One program is composed of a plurality of cells, one cell is recorded in a hierarchical structure composed of a plurality of packs, and each of the main video data, audio data, sub-picture data, and disk search information data is stored in the pack.
In reproducing a recording medium having data indicating a data type and data indicating a data length, in which a predetermined amount of data is recorded in sector units, the pack data in sector units of the recording medium is read, Based on the read pack data, it is determined whether the data type is main video data, audio data, sub-video data, or disc search information data, and the data length is determined, and the above determination in the read pack data is performed. The data of the selected data length is extracted, the extracted data is demodulated corresponding to the determined data type, and the demodulated data is reproduced and output.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram of an optical disc reproducing apparatus for reproducing data from an optical disc according to an embodiment of the present invention, and FIG. 2 is a block diagram of a disc drive unit for driving the optical disc shown in FIG. 3 shows the structure of the optical disc shown in FIGS. 1 and 2, and FIG. 4 shows the recording configuration of the optical disc shown in FIGS. 1, 2 and 3.

In the optical disk reproducing apparatus shown in FIG. 1, the user operates the key operation section and the display section 4 to reproduce the record data, that is, the video data, the sub-picture data and the audio data from the optical disk 10, and the inside of the apparatus is reproduced. Is converted into an audio signal and a video signal and reproduced as video and audio by the monitor unit 6 and the speaker unit 8 outside the apparatus. This optical disc reproducing apparatus is a system for reproducing MPEG-compressed moving images, characters for subtitles and the like and sub-picture data used for simple animation on the optical disc 10 according to the MPEG system layer.

Characters and simple animations are run-length compressed and are hereinafter referred to as sub-pictures. As already known, the optical disc 10 has various structures,
As shown in FIG. 3, for example, a recording layer on the transparent substrate 14,
That is, a pair of structures 18 having the light reflection layer 16 formed thereon are prepared, and the pair of structures 18 are laminated via the adhesive layer 20 so that the recording layer 16 is enclosed therein. Types have appeared. In the optical disc 10 having such a structure, the spindle motor 12 is provided at the center thereof.
A center hole 22 into which the spindle is inserted is provided, and a clamping area 24 for holding the optical disk 10 during its rotation is provided around the center hole 22.

An area from the clamping area 24 to the outer peripheral edge of the optical disk 10 is defined as an information recording area 25 in which information can be recorded on the optical disk 10. Figure 3,
In the optical disc shown in FIG. 4, information recording areas 2 are provided on both sides of the optical disc.
Will have 5. Each information recording area 25 has a lead-out area 2 where information is not normally recorded in the outer peripheral area.
6 and its inner peripheral area which is in contact with the clamping area 24 is similarly defined as a lead-in area 27 in which information is not normally recorded. Further, data is recorded between the lead-out area 26 and the lead-in area 27. It is defined in the area 28. In the recording layer 16 of the information recording area 25, normally, tracks are continuously formed in a spiral shape as an area in which data is recorded, and the continuous tracks have a plurality of fixed storage capacities as shown in FIG. Is divided into logical sectors (minimum recording unit), and data is recorded based on this logical sector. The recording capacity of one logical sector and the data length of one pack described later are set to the same 2048 bytes. Data recording area 2 of information recording area 25
Reference numeral 8 denotes an actual data recording area, in which management data, main image (main image) data, sub-image (sub-image) data, and audio (audio) data are also in a physical state such as pits, as will be described later. Recorded as a change. In the read-only optical disc 10, a pit string is formed in advance on the transparent substrate 14 by a stamper, a reflective layer is formed by vapor deposition on the surface of the transparent substrate 14 on which the pit string is formed, and the reflective layer is formed as the recording layer 14. Will be done. Further, in the read-only optical disc 10, usually, no groove is provided as a track, and a pit row is defined as a track.

In the optical disc reproducing apparatus for reproducing data from such an optical disc 10, the optical disc 10 is used.
The optical disc drive unit 30 that drives the optical disc 1
0 is searched for in the light beam. That is, as shown in FIG.
The optical disc 10 is placed on a spindle motor 12 driven by a motor drive circuit 11, and is rotated by the spindle motor 12. Optical disc 10
An optical head, that is, an optical pickup 32 for condensing a light beam, that is, a laser beam on the optical disc 10 is provided below the optical disc 10. The optical head 32 is mounted on a guide mechanism (not shown) so as to be movable in the radial direction of the optical disk 10 in order to search the information recording area 25, particularly the data recording area 28, and is driven by the drive circuit 37. The feed motor 33 driven by the drive signal moves the optical disk 10 in the radial direction. The objective lens 34 is held on the optical disc 10 so as to be movable along its optical axis.
In response to the drive signal from the focus drive circuit 36, the focus lens is moved in the optical axis direction, the objective lens 34 is always maintained in the focus state, and a minute beam spot is formed on the recording layer 16. The objective lens 34 is held so that it can be finely moved in the radial direction of the optical disc 10, is finely moved in response to a drive signal from the track drive circuit 38, and is always maintained in a tracking state so that the recording layer 16 of the optical disc 10 is maintained. The upper track is tracked with a light beam.

In the optical head 32, the light beam reflected from the optical disk 10 is detected, and the detected detection signal is supplied from the optical head 32 to the servo processing circuit 44 via the head amplifier 40. The servo processing circuit 44 generates a focus signal, a tracking signal and a motor control signal from the detection signal, and supplies these signals to the drive circuits 36, 38 and 11, respectively. Therefore, the objective lens 34 is maintained in the focus state and the tracking state, the spindle motor 12 is rotated at a predetermined rotation number, and the light beam causes the track on the recording layer 16 to be a light beam, for example, a constant linear velocity. Tracked in. System CP
When a control signal as an access signal is supplied from the U section 50 to the servo processing circuit 44, a movement signal is supplied from the servo processing circuit 44 to the drive circuit 37, and the optical head 32 is moved along the radial direction of the optical disc 10. A predetermined sector of the recording layer 16 is accessed, reproduction data is amplified by the head amplifier 40 and output from the disk drive unit 30. The output reproduction data is stored in the data RAM section 56 via the system CPU section 50 and the system processor section 54 which are controlled by the program recorded in the system ROM and RAM section 52. The stored reproduction data is processed by the system processor unit 54 and classified into video data, audio data and sub-picture data, and the video data, audio data and sub-picture data are respectively video decoder unit 58 and audio decoder unit 60. And output to and decoded by the sub-picture decoder unit 62. The decoded video data, audio data, and sub-picture data are D / A and reproduction processing circuit 64.
Are converted into analog video signals, audio signals and sub-picture signals and mixed, and the video signals and sub-picture signals are supplied to the monitor 6, and the audio signals are supplied to the speaker 8. as a result,
Video is displayed on the monitor unit 6 and sound is reproduced from the speaker unit 8. Detailed operation of the optical disk device shown in FIG. 1 will be described later in detail together with the logical format of the optical disk 10 described next.

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 logical format of ISO966.
It has a volume structure as shown in FIG. This volume structure is composed of a volume management information area 70 and a file area 80 having a hierarchical structure. The volume management information area 70 is ISO966
The logical block numbers 0 to 23 determined based on 0 correspond to the system area 72 and the volume management area 74. The system area 72 is not usually defined as an empty area, but is provided for an editor who edits data to be recorded on the optical disk 10, for example, and realizes driving of the optical disk device according to the intention of the editor. A system program for this purpose is stored as needed. In the volume management area 74, volume management information for managing the disk information file 76 (hereinafter, simply referred to as the disk information file 76) of the file area 80 and a file 78 such as a movie file or a music file, that is, all the volume management information. The file recording position, recording capacity, file name, and the like are stored. In the file area 80, files 76 and 78 having file numbers 0 to 99 specified by logical block numbers after the logical block number 24 are arranged, and the file 76 having file number 0 is allocated as the disk information file 76. , File number 1 to file number 99
The files 78 up to are allocated as movie files, that is, video files or music files.

As shown in FIG. 6, the disc information file 76 is composed of a file management information area 82 and a menu video data area 84. In the file management information area 82, selectable information recorded on the entire optical disc 10 can be selected. File sequence information, that is, file management information for selecting a video or audio title is described. Further, in the menu video data area 84, image data of a menu screen for displaying a selection menu such as a title is stored as a cell unit menu data cell 90. That is, the menu video data area 8
As described in detail later, the menu video data of No. 4 is divided into units of a required size according to the purpose, and the disc 10
I menu cells 90 sequentially numbered from # 1 in the order of recording in the menu video data area 84 of
Has been defined as. The menu cell 90 stores video data, sub-video data, or audio data related to movie or audio title selection, program selection of each title, and the like.

As shown in FIG. 6, the file management information area 82 includes disc configuration information (DSINF: Disc Str).
structure information area 86 for storing structure information, menu structure information (MSINF: Menu Structu).
(re information) menu configuration information area 8
7. Cell information table (MCIT:
Menu Cell Information Table) 88 has three types of information areas, which are arranged in this order.

In the disc configuration information area 86, the number of movie files and music files recorded in the file area 80 of the disc 10, that is, the number of reproduction files 78 (as a parameter DSINF within the range of 1 to 99) is described. , A sequence (a series of data groups of video data including video, audio, sub-video, etc.) existing in each file 78, which will be described in detail later.
Further, hereinafter, it is simply referred to as a sequence. ), That is,
Information such as the number of titles (described as the parameter FSINF) is described.

In the menu configuration information area 87, the number of menu cells 90 of the menu video data area 84 recorded in the disc information file 76 (described as a parameter NOMCEL) and the titles existing in the disc. The starting cell number of the title menu cell 90 that constitutes a series of menu video data for selecting (is described as a parameter TMSCEL).
Information such as is described.

In the menu cell information table 88, cell information necessary for reproducing each menu cell 90 is defined in a set of i cell information areas 89 in which cell information is described in the order of cell numbers. This cell information table 88 has a file 76
Information such as the position of the cell 90 (described as the parameter MCSLBN by the offset logical block number from the head of the file) and the size (described as the parameter MCNLB by the number of logical blocks) is described.
Here, the disc configuration information (DSINF) and the menu configuration information (MSINF) are stored in the file management information area 8
2 consecutively, and the menu cell information table (M
CIT) 88 is aligned with the boundary of the logical block.

Music data or movie data of one or a plurality of titles is stored in movie files and music files 78 corresponding to file numbers 1 to 99. As shown in FIG. 7, each of the files 78 includes a file management information area 101 in which specification information for data contained in the file 78, that is, management information (for example, address information and reproduction control information) is described. It has a file structure composed of a video data area 102 in which the video data of the file 78 (video, audio, sub-video data, etc. are simply referred to as video data) is described. In the video data area 102, the disc information file 76
Similar to the menu cell 90, the video data is divided into cell units, and the video data is arranged as j video data cells 105.

Usually, movie data or audio data of a title is represented as a set of continuous sequences 106. For example, a movie story
It is represented by a continuous sequence 106 corresponding to "start", "accept", "roll" and "conclude". Therefore, the video data area 102 of each file 78 is defined as a set of sequences 106 as shown in FIG. Also,
Each sequence 106 is represented by a plurality of video programs (chapter) 107 corresponding to various scenes, and each video program 105 is composed of a plurality of video data cells 105. Each video cell 105 has a disc search information (DSI) pack 9 as shown in FIG.
2, a single image group (GOP:
Group of Pictures) are arranged in groups. The configuration of the video cell 105 is substantially the same as that of the menu cell 90, and the video data 102 is M
Data such as moving images (movies), audio (audio), and sub-pictures compressed according to a compression standard such as the PEG standard (Moving Picture Expert Group) is recorded in a data format compatible with the system layer of MPEG2. That is, the video data 102 is a program streamer defined by the MPEG standard. In addition, each pack 9
2, 93, 95 and 98 have a pack structure composed of a pack header 97 and a packet 99 corresponding to the pack.

The main video pack in the moving picture is MPE.
It is composed of I-pictures, P-pictures, and B-pictures according to the G standard. A sub-picture unit is composed of a plurality of sub-picture packs, one still picture is obtained by this sub-picture unit, and at least one sub-picture unit can be formed in one cell. .

The file management information area 101 is a file management table (FMT) 1
13. Sequence information table (SIT: Sequence In
formation Table) 114, cell information table (CI
T: Cell Information Table) 115 and the like.

The video data cells in the video data area 102 are sequentially numbered from # 1 in the order of recording on the optical disk 10, and the cell number and information relating to the cells in relation to this cell number are stored in the cell information table. 115
It is described in. That is, the cell information table 115 is defined as a set of areas 117 in which j pieces of cell information (CI) in which information necessary for reproducing video data cells is described in the order of cell numbers are stored. ) Has
Information such as the position, size, and reproduction time of the cell in the file 78 is described.

FIG. 10 shows this cell information table 115.
The contents of the cell information (CI) stored in are shown.
In this cell information 117, the contents such as the start position and size of the video cell obtained by dividing the video data in units according to the purpose are described by parameters. That is, this cell information (CI)
Is cell type information (CCAT) indicating the contents of the video cell such as whether the video cell is a movie, karaoke or interactive menu, cell reproduction information (CTIME) indicating the total reproduction time of the video cell, and start of the video cell. Position, that is, cell start position information (CSL) indicating the start address
BN) and cell size information (CNLB) indicating the size of each video cell.

The sequence information table 114 includes i pieces of sequence information (S) that describe the order of selecting and reproducing the cells 105 within the range specified for each sequence 106.
The sequence information (SI) defines the reproduction order of the video cells 105 recorded in the sequence 106 and reproduction control information regarding reproduction. This sequence 1
In 06, a complete type sequence that is completed in one sequence,
There is a connection-type sequence that is branched and connected to the next sequence for each sequence. The connection-type sequence is the first sequence of video data corresponding to a multi-story, and is branched from this sequence and connected to the next sequence. Connection-type head sequence that can be changed, that is, a connection-type head sequence whose story changes according to its selection method, a connection-type intermediate sequence that is branched from another connection-type sequence and connected to another sequence, and others There is a connection-type end sequence that is connected from the connection-type sequence and ends the sequence, that is, a connection-type end sequence in which the story ends in this sequence. The sequence information numbers are defined as sequence numbers 1 to i, and the start position information of each is written in the file management information table 113.

FIG. 11 shows the contents of one piece of sequence information (SI) stored in the sequence information table 114 in the file management information area 101 shown in FIG. Sequence information area 1 as shown in FIG.
In 16, the reproduction order of video cells, sequence information, and the like are described. The sequence information (SI) number matches the sequence number, and the sequence information table 11
4 are assigned in the numerical order. Sequence number 1 is a default playback sequence, and it is said that it is desirable that cells in the sequence are arranged consecutively in a specified order. The sequence information 116 includes sequence type information (SCAT), sequence reproduction time (STIME), connection sequence number information (SNCS).
Q), sequence number list information (SCSQN), and sequence control information (SCINF).
The sequence type information (SCAT) is a complete sequence that is reproduced after one sequence and ends, and a start sequence of video data corresponding to multi-story, which can be branched from this sequence and connected to the next sequence. A connection-type leading sequence, a connection-type intermediate sequence that branches from another connection-type sequence and is connected to another sequence, and a connection-type end sequence that is connected from another connection-type sequence and ends that sequence Is described. The sequence playback time (STIME) describes the total playback time of the sequence, and the connected sequence number information (SNCSQ) contains
Describes the number of sequences that can be connected to the sequence after playing the sequence in the connection-type sequence,
In the sequence number list information (SCSQN), the numbers of the sequences of the connection destinations corresponding to the number described in the connection sequence number information (SNCSQ) are described as a list.
The sequence control information (SCINF) describes the reproduction order of the cells forming the sequence, and the cells are reproduced and the sequence is executed according to this description. A section in which one cell is selected and reproduced from a plurality of cells is described by a block as a set of cells, and the sequence of the block is executed by designating the block. In addition, the sequence defines a program as a reproduction unit in which one or more cells whose reproduction order is continuous are combined, and its number is described. The program numbers in the sequence are assigned in ascending order from # 1.

The file management table 113 shows the specification information regarding the video file 78. In this file management table 113, the file name and a file identifier for identifying whether or not the file can be played back by the optical disk playback device loaded with the optical disk are described. Further, in the file management table 113, the start addresses of the sequence information table 114 and the cell information table 115, the numbers of the sequence information 116 and the cell information 117 described in the respective tables, and the relative distance from the beginning of the file 78. As the start address of the sequence information table 114, the start address of each sequence information 116 indicated by the relative distance from the beginning of the sequence information table 114, the start address of the video data 102, and the information for reproducing each data. The data attributes and the like are described.

The file management table (FMT) 113 is composed of areas in which a plurality of parameters are recorded, and each area has a file name (FFNAM) as shown in FIG.
E), the file identifier (FFID) as information for identifying a movie file, and the size (FS) of the file management table (FMT) described by the number of logical blocks.
ZFMT), total number of sequences present in this file (FNSQ), number of cells present in this file (FN
CEL), the number of disc search information (DSI) packs (FNDSI) existing in the video data of this file
P), the number of logical blocks (FNLB) corresponding to the size of this file, the start address (FSASSIT) of the sequence information table 114 in this file indicated by the offset logical block number from the beginning of the file, the offset logical block from the beginning of the file Start address (FSACIT) of the cell information table 115 in this file indicated by a number, offset logical block from the beginning of the file Disk search map start address (FSADSM) in this file indicated by a number, offset logical block from the beginning of the file Video data start address (FSADVD) in this file indicated by number,
The start address (sequence information table 11) of each sequence information in the sequence information table 114 of this file in which the sequence is described in the order of description of the sequence information.
4 offset byte number from the beginning), size (FSAESI), and sequence information are described in the order of sequence information. The minimum number of cells used in each sequence existing in this file and between the minimum number and the maximum number are used. Number of cells (FSNCIB), video data attribute (FVATR) indicating the reproduction mode of video data recorded in this file, audio data recorded in this file that can be reproduced in the same time zone as this video data Number of audio streams (FNAST) indicating the number of streams (data strings), individual audio stream attributes (FAATR) corresponding to the recording order corresponding to the number of streams, and reproduction in the same time zone as the above video data. Of the sub-picture data recorded in this file is possible Number of sub-picture channels indicating the number of channels (FNSPCH), individual sub-picture channel attributes (FSPATR) in which the channel numbers and the recording order correspond to the number of channels, and sub-channels used for all the video data of the file Video color palette (FS
Parameters such as PPLT), a vendor definition (FVDEF) that defines an area that a vendor can use freely for a specific purpose, and the like are recorded.

In FIG. 12, when the number of audio streams is n, the audio data attribute that follows is # 1.
Up to #n are recorded continuously in the order of stream numbers. Similarly to the above, when the number of sub-picture channels is m, the sub-picture data attributes that follow are recorded continuously in the order of channel numbers from # 1 to #m.

If the number of audio streams or the number of sub-picture channels is zero (0), the audio data attribute or the sub-picture data attribute is not recorded. As shown in FIGS. 7 to 9 and 13, the video data is a collection of main video (video) data, audio data, sub-video data, and disc search information (DSI) data, and is recorded in pack units. Has been done.

As shown in FIGS. 14 and 15, the pack is composed of a packet composed of a pack header, main picture data, sub-picture data, and disk search information (DSI) data.

The pack length of the pack is adjusted to be 2048 bytes (1 logical sector). If the pack length is less than 2048 bytes, and the number of bytes that is less than 6 bytes is 6 bytes or less, adjust the pack length by adding the stuffing byte in the pack header, and if it 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 insufficient bytes to the packet.

The pack header is a 4-byte pack start code (000001BAh) and a 6-byte SCR.
(System clock reference, system time reference reference value), 3-byte multiplexing rate (MUX rate; 04)
68A8h) composed of 1 byte to 7 bytes of stuffing byte (00h). The packet is composed of 2034 bytes as a standard, and a padding packet for pack length adjustment (replenishment data 00h which does not make sense as data is recorded in each byte unit) is provided in this packet as needed. It is designed to be used.

That is, as shown in FIG. 14, when the data length forming a packet is 2034 bytes to 2028 bytes, stuffing bytes are added (inserted) in the pack header by the number of the insufficient bytes.

Further, as shown in FIG. 15, when the data length of a packet is 2027 bytes or less, padding packets corresponding to the insufficient number of bytes are added. For example, packing of main video data will be described.

That is, as shown in FIG. 16, when the main video data having a data length of 2015 bytes is packed,
The standard number of bytes (2034 bytes) of one packet is compared with the number of bytes (20151 bytes) of the main video data plus the packet header of 6 bytes (2021 bytes). By calculation, it is determined that the padding packet of 13 bytes is added,
A standard 14-byte pack header with 1 stuffing byte and 1 for the main video packet of 2021 bytes
A 2048-byte pack is formed by a 2034-byte packet added with a 3-byte padding packet.

Further, as shown in FIG. 17, the data length is 2
When packing 025 bytes of main video data, the standard number of bytes (2034 bytes) of one packet and the number of bytes (2025 bytes) of the main video data (2025 bytes) plus the packet header of 6 bytes (2031 bytes) Is calculated, and the shortage of 3 bytes is calculated by this comparison, 3
It is judged that the stuffing byte of the byte is added, and the pack header of 17 bytes that adds the stuffing byte of 3 bytes in addition to the stuffing byte of 1 byte, and 2
The 031 byte video packet forms a 2048 byte pack.

Each of the packs is a disc search information (DSI) pack 92 made up of disc search information data,
The main video pack 93 includes main video data, the sub video pack 95 includes sub video data, and the audio pack 98.

Next, each pack will be described in detail. As shown in FIG. 18, the disc search information pack 92 is arranged immediately before the main video pack including the head data of one GOP, and has a 14-byte pack header, a 24-byte system header, and One pack is composed of a DSI packet including a packet header of 6 bytes and a disc search information data of up to 2004 bytes.

As described above, the pack header has a 4-byte pack start code (000001BAh), 6
Byte SCR (system clock reference, system time reference), 3 byte multiplexing rate (MU
X rate: 0468A8h) It is composed of stuffing bytes (00h) of 1 byte to 7 bytes.

The system header is composed of a 4-byte system header start code (000001BBh), a 2-byte header length, and the like. Packet header is 3
Byte packet start code (000001h),
1-byte stream ID, 2-byte PES (Packet
ized Elementary Streme) packet length.

The main video pack 93 is shown in FIG.
As shown in (b), a 14-byte pack header and 9
A main video packet that consists of a byte packet header and a data area that can store up to 2025 bytes of main video data, or a main video packet that contains a 19-byte packet header and a data area that can store up to 2015 bytes of main video data. One pack is configured. The pack header has the same structure as that of the DSI pack 92.

If the packet header is 9 bytes, a 3-byte packet start code (000001h), 1
Byte stream ID, 2-byte PES (Packetiz
ed Elementary Streme) PES with packet length of 3 bytes
It is composed of data related to.

When the packet header is 19 bytes, a PTS (Presentation T
ime Stamp: Playback output time management information) and 5-byte D
A TS (Decoding Time Stamp) is additionally configured. This PTS and DTS are G
It is described only in the main video packet including the data of the beginning of the I picture of OP.

The audio pack 98 is shown in FIG.
As shown in (b), a 14-byte pack header and 1
An audio packet consisting of a 4-byte packet header and a data area that can store up to 2020 bytes of audio data (when the audio data is AC3), or a 14-byte packet header, a 1-byte substream ID, and up to 2019 bytes of audio. One pack is composed of audio packets (when the audio data is linear PCM) formed of a data area in which data can be stored. The pack header is the above DSI
The structure is the same as that of the pack 92.

The packet header consists of a 3-byte packet start code (000001h), a 1-byte stream ID, and a 2-byte PES (Packetized Elementary Std).
reme) Packet length, PES content of 3 bytes, and PTS (Presentation Time Stamp; time management information of reproduction output) of 5 bytes.

A code indicating a linear PCM stream is added to the substream ID added when the audio data is linear PCM. Sub-picture pack 9
As shown in FIGS. 21A and 21B, 5 is a data area capable of storing a 14-byte pack header, a 9-byte packet header, a 1-byte substream ID, and 2024 bytes of sub-picture data. Or a sub-picture packet consisting of a 14-byte packet header, a 1-byte sub-stream ID, and a data area capable of storing sub-picture data of up to 2019 bytes constitutes one pack. The pack header is
The configuration is the same as that of the DSI pack 92.

A code indicating the sub-picture stream is added to the sub-stream ID. Packet header is 9
In the case of bytes, it is composed of 3-byte packet start code (000001h), 1-byte stream ID, 2-byte PES (Packetized Elementary Streme) packet length, and 3-byte PES data.

When the packet header is 14 bytes, a PTS (Presentation T
ime Stamp (time management information of reproduction output) is additionally configured. This PTS is described only in the sub-picture packet including the head data of each sub-picture unit.

In the SCR described in each pack, the value of the first pack of video data after each file is set to 0,
The number of recordings on the optical disk 10 increases in ascending order.

The disc search information (DSI) is 1
It is set at the beginning of one GOP, general information,
It is composed of reproduction synchronization information, DSI pack address information, angle address information, effect information, and highlight information.

The general information is composed of SCR of DSI, reproduction time stamp of GOP, logical block number of DSI, cell number, and parental control level. D
The SCR of SI describes the SCR described in the pack header. This G is used as the GOP playback time stamp.
The playback disclosure time of the OP code display first frame is described. In the logical block number of DSI, the address of this DSI pack is described by the offset logical block number from the head of the file. The cell number to which this GOP belongs is described in the cell number. The parental control level describes the parental control level (for example, 5 levels) during the GOP reproduction period.

The reproduction synchronization information includes reproduction start time and position information of GOP, audio data reproduced in synchronization with video data, and reproduction start time and position information of sub-picture data. The reproduction synchronization information includes an I-picture PTS, an address of a pack including the I-picture, an audio PTS, an audio pack address, a sub-picture PTS, and a sub-picture pack address. PTS of I picture
Describes the reproduction start time of the I picture as an offset PTS from the reproduction time stamp of the GOP. In the address of the pack containing the I picture, the address of the video pack containing the I picture is described by the offset logical block number from this DSI pack. Audio PT
In S, the PTS of the audio packet having the closest reproduction start time after the reproduction start time of the I picture is GOP.
It is described by the offset PTS from the reproduction time stamp of. In the audio pack address, the address of the audio pack targeted by the audio PTS is described by the offset PTS from this DSI pack.
In the PTS of the sub-picture, the reproduction start time and the end time of the sub-picture pack reproduced during the reproduction period of the GOP are described by the offset PTS from the reproduction time stamp of the GOP. In the pack address of the sub-picture, the address of the sub-picture pack that is the target of the PTS of the sub-picture is described by the offset logical block number from this DSI pack.

The DSI pack address information is used for other DSI.
This is position information of the pack 92. The angle address information is position information of another angle. The effect information describes various effect processes that occur during the GOP reproduction period.

The highlight information is the position of the selected item on the menu screen, the changed color, and the changed contrast information, and this information is effective only when the cell to which it belongs is a menu cell or an interactive menu cell.

The highlight information is composed of the selection item start number / number of items, the position of the selection item, the color, and the contrast. The selection item start number / number of items describes the start number and the number of selection items of the selection items displayed in the sub-picture on the menu screen. For the position, color, and contrast of the selection items,
The display rectangular area of the corresponding selection item on the menu screen and the color and contrast information to be changed when the selection item is selected are described in order from the start selection number for the number of selection items. The display rectangular area is defined by XY coordinates with the origin at the upper left of the video display.

The system processor section 54 has a packet transfer processing section 200 for judging the packet type and transferring the data in the packet to each decoder. The packet transfer processing unit 200, as shown in FIG. 22, has a memory interface unit (memory I / F unit) 2
01, 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 receives the stuffing length detecting unit 202, the pack type discriminating unit 204, the packet data transfer control unit 205, and the decoder I / F unit 2 from the data RAM unit 56 through the data bus.
The data is output to 06.

The stuffing length detection unit 202 detects how many bytes the stuffing length is in the pack header in the pack data supplied from the memory I / F unit 201, and the detection result is the end of the pack header. It is output to the address calculation unit 203.

Pack header end address calculation unit 203
Calculates the pack header end address based on the stuffing length supplied from the stuffing length detection unit 202. The calculation result is the pack type determination unit 20.
4 and the packet data transfer control unit 205.

The pack type discriminating unit 204 is supplied next to the address in the pack data supplied from the memory I / F unit 201a according to the pack header end address supplied from the pack header end address calculating unit 203. Depending on the contents of the 4-byte data, the main video pack,
It is for determining whether the pack is an audio pack, sub-picture pack, or DSI pack, and the result of this judgment is output to the packet data transfer control unit 205.

That is, when a 4-byte system header start code is supplied, it is determined to be a DSI pack,
A 3-byte packet start code and a stream ID indicating a 1-byte main video stream identify the main video pack, and a 3-byte packet start code and a 1-byte stream ID determine the audio pack.
A packet start code of 1 byte and a stream ID of 1 byte are used to identify a sub-picture pack. However, if the stream ID is a private stream, the substream ID that follows the packet header
Is used to discriminate between an audio pack and a sub-picture pack.

The packet data transfer control unit 205 determines the transfer destination and the packet start 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 further the packet length in the packet header of the supplied pack data is determined. Further, the packet data transfer control unit 205
Supplies a signal indicating the transfer destination as a transfer control signal to the decoder I / F unit 206, and the packet end address from the packet start address to the memory I / F unit 20.
1 is supplied.

The decoder I / F unit 206 is controlled by the packet data transfer control unit 205 from the memory I / F unit 201 according to the transfer control signal supplied from the packet data transfer control unit 205, and is supplied by the packet header. Main video data, audio data, or sub-picture data as packet data including the above is output to the corresponding decoder units 58, 60, 62, or DSI as packet data is output to the data RAM unit 56. .

Next, referring again to FIG. 1, FIG. 5 to FIG.
The reproduction operation of movie data from the optical disc 10 having the logical format shown in FIG. In FIG. 1, solid arrows between blocks indicate data buses,
The dashed arrow indicates the control bus.

In the optical disk device shown in FIG. 1, when the power is turned on, the system ROM and RAM
The system CPU unit 50 reads the initial operation program from 52 and operates the disk drive unit 30. Therefore, the disk drive unit 30 has the lead-in area 27.
The read operation is started from the volume management information area 7 of the volume management area 70 following the lead-in area 27.
The volume management information is read from 4. That is, the system CPU section 50 gives a read command to the disk drive section 30 in order to read the volume management information from the volume management information area 74 recorded at a predetermined position of the disk 10 set in the disk drive section 30, The contents of the volume management information are read out and temporarily stored in the data RAM unit 56 via the system processor unit 54. The system CPU section 50 has a data RAM section 56.
The information such as the recording position and recording capacity of each file and other information necessary for management are extracted from the data string of the volume management information stored in, and transferred to a predetermined location of the system ROM & RAM section 52 and stored.

Next, the system CPU section 50 refers to the information on the recording position and recording capacity of each file previously acquired from the system ROM & RAM section 52 and refers to the file number 0.
The disk information file 76 corresponding to the number is acquired. That is, the system CPU unit 50 includes a system ROM and R
The AM unit 52 gives a read command to the disk drive unit 30 by referring to the information on the recording position and the recording capacity of each file acquired earlier, and outputs the file management information of the disk information file 76 having the file number 0. The data RAM section 56 is read through the system processor section 54.
To be stored. Similarly, the acquired information is used for system ROM &
It is transferred to a predetermined location in the RAM section 52 and saved.

The system CPU section 50 reproduces the sequence (title) selection menu of the menu video data area 84 by using the disc configuration information, the menu configuration information and the cell information of the file management information of the disc information file 76, Display it on the screen as described below.

The user designates the selection of the sequence (title) to be reproduced by using the key operation and the display section 4 based on the selection number written on the displayed menu screen.
As a result, the file number to which the selected sequence belongs and the sequence information are specified. In this sequence selection, there are cases where all sequences are selected based on the menu screen, and cases where the first sequence is selected and the next sequence is selected from the menu cells included in the video cells at the end of the sequence.

Obtain the designated video file 78,
The operation of reproducing the video data 102 will be described below. In order to obtain the sequence information for the designated sequence number, using the recording position and the recording capacity of each video file 78 obtained from the volume management information 74,
First, the video file 7 to which the sequence to be played belongs
The file management information 101 of No. 8 is read out and stored in the data RAM unit 56 as in the case of the disk information file 76.

The system CPU section 50 uses the file management table 113 of the file management information stored in the data RAM section 56 to determine the video attribute, audio stream attribute,
The sub-picture channel attributes are acquired, and the control signals corresponding to these attributes are supplied to the video decoder section 58, the audio decoder section 60, the sub-picture decoder section 62, the D / A & reproduction processing section
4 is output.

The system CPU section 50 acquires the sequence information corresponding to the designated sequence number from the sequence information table 114 of the file management information area 101 stored in the data RAM section 56, and the data,
The cell information in the cell information table 115 necessary for reproducing the sequence is stored in the system ROM & RAM section 52.
Transfer to and store.

The cell information to be reproduced first is acquired from the cell reproduction order information in the sequence information thus acquired, and the disc drive unit 30 is based on the video data reproduction start address and size in the cell information. Is given a read instruction from the target address. The disc drive unit 30 drives the optical disc 10 in accordance with the read command, reads the data of the target address from the optical disc 10, and sends it to the system processor unit 54. The system processor unit 54 temporarily stores the sent data in the data RAM unit 56, and as described above, based on the header information added to the data, the data type (main video, audio, sub-video, Disc search information, etc.), and the main video data, audio data, and sub-video data are decoded according to the determined type.
0 to 62, transfer the disk search information to the data RAM
Transfer to section 56.

This processing will be described with reference to the flowchart shown in FIG. That is, the system CPU
The unit 50 transfers the read command and the logical sector address of the pack to be reproduced to the disk drive unit 30 (S
1).

Then, the disk drive unit 30 seeks the target address (S2). Then, the disk drive unit 30 performs error correction on the data at the target address,
The main data portion in the logical sector data is transferred to the system processor unit 54 (S3).

The system processor section 54 stores the read data of the logical sector in the data RAM section 56 (S
4). The system processor unit 54 includes a data RAM unit 5
The pack header is read from the beginning of the data of the logical sector stored in 6 and its SCR (system time reference value) is stored (S5).

At this time, since the head of the logical sector and the head of the pack data coincide with each other, data can be taken out easily. Then, the system processor unit 54 compares its own PTS with the SCR of each of the stored packs,
The pack corresponding to the SCR reaching the PTS, that is, the pack to be reproduced and output is determined, the determined pack data is read from the data RAM unit 56, and the packet transfer processing unit 200 is read.
The data type is discriminated by the decoder section 58, 60, 62 or the data RAM section 56 according to the discriminated type.
(S6).

Then, each decoder section 58, 60, 62 decodes the data in accordance with the respective data format and the encoding method set above and sends it to the D / A & reproduction processing section 64. The D / A & reproduction processing unit 64 converts the digital signal of the decoded result of the video data into an analog signal, and then performs frame rate processing, aspect processing, pan scan processing, etc. according to the conditions set above, and the monitor unit 6 Is output. D / A & reproduction processing unit 64
Then, after the decoding result of the audio data is converted into an analog signal from the digital signal according to the above set conditions, the D / A & reproduction processing section 64 performs mixing processing according to the above set conditions and outputs it to the speaker section 8. It The D / A & reproduction processing unit 64 converts the digital signal of the decoding result of the sub-picture data into an analog signal,
It is output to the monitor unit 6 (S7).

The above steps S3 to S7 are repeated until the reproduction is completed. Next, the processing of the packet transfer processing unit 200 will be described. That is, the pack data read from the data RAM unit 56 passes through the memory I / F unit 201, the stuffing length detection unit 202, the pack type determination unit 204, the packet data transfer control unit 205, and the decoder I / F.
It is supplied to the unit 206 (S11).

As a result, the stuffing length detector 20
2, the stuffing length is detected, and data indicating the stuffing length is output to the pack header end address calculation unit 203 (S12).

The pack header end address calculation unit 203 calculates the pack header end address from the supplied stuffing length, and this pack header end address is the pack type determination unit 204 and the packet data transfer control unit 20.
5 is supplied (S13).

According to the supplied pack header end address, the pack type discrimination unit 204 determines which of the main video pack, the audio pack, the sub video pack and the DSI pack according to the content of the 4-byte data supplied next to the address. Is determined and the determination result is supplied to the packet data transfer control unit 205 (S14).

That is, when the 4-byte system header start code is supplied, it is determined as a DSI pack,
A 3-byte packet start code and a stream ID indicating a 1-byte main video stream identify the main video pack, and a 3-byte packet start code and a 1-byte stream ID determine the audio pack.
It is discriminated as a sub-picture pack by the packet start code of bytes and the stream ID of 1 byte. However, in the case of a private stream as the stream ID, the substream ID following the packet header determines whether it is an audio pack or a sub-picture pack.

Then, the packet data transfer control unit 205
Determines the transfer destination and the packet start address according to the supplied pack type determination result and the pack header end address, and further determines the packet length in the packet header of the supplied pack data. As a result, the packet data transfer control unit 205 supplies a signal indicating the transfer destination as a transfer control signal to the decoder I / F unit 206, and the packet end address to the packet end address are supplied to the memory I / F unit 201. (S1
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 the decoders 58, 60, 62 or the data RAM unit 56 as transfer destinations according to the type (S16).

At this time, since the pack data has a constant length, the storage state in the data RAM section 56 is, that is, the start addresses are at constant intervals, so that the head of the pack data in the data RAM section 56 is always at the same interval address. Since it is saved, the pack data management does not have to manage the address, but only the pack number.

In the process of discriminating the type of data, if the data is disc search information indicating the reproduction position of the video data, the disc search information is not transferred to the decoder, and the reproduction data is It is stored in the RAM unit 56. The reproduction information is referred to by the system CPU unit 50 as necessary and used for monitoring when reproducing the video data.

When the reproduction of one cell is completed, the cell information to be reproduced next is obtained from the cell reproduction order information in the sequence information, and the reproduction is continued in the same manner. next,
With reference to FIGS. 24 to 33, a description will be given of video data in the logical formats shown in FIGS. 5 to 13, a recording method on the optical disc 10 for reproducing the video data, and a recording system to which the recording method is applied.

FIG. 24 shows an encoder system that encodes video data to generate a video file. In the system shown in FIG. 24, as sources of main video data, audio data and sub-video data, for example, a video tape recorder (VTR) 211,
An audio tape recorder (ATR) 212 and a sub picture source (Subpicture source) 213 are adopted. These generate main video data, audio data, and sub-video data under the control of the system controller (Sys con) 215, and these generate video encoder (VEN).
C) 216, audio encoder (AENC) 217
And a sub-picture encoder (SPENC) 218. Similarly, under the control of the system controller (Sys con) 215, the encoders 216, 217, and 218 A
Main video data, audio data, and sub video data (Comp Video, Comp Audio, Comp Sub
-pict) in the memories 220, 221, 222. This main video data, audio data and sub video data (Comp Video, Comp Audio, Comp Sub-pict)
Is output to the file formatter (FFMT) 224 by the system controller (Sys con) 215, converted into the file structure of the video data of this system as described above, and information such as setting conditions and attributes of each data is stored in the file. As a system controller (Sys con
) 215 and stored in the memory 226.

A standard flowchart of the encoding process in the system controller (Sys con) 215 for creating a file from video data will be described below. 25. Main video data and audio data are encoded according to the flowchart shown in FIG. 25 and encoded main video and audio data (Comp Video, CompAudi
o) data is created. That is, when the encoding process is started, the parameters necessary for encoding the main video data and the audio data are set as shown in step 70 of FIG. Some of the set parameters are set in the system controller (Sys con) 215.
File formatter (FFMT) 22
Used in 4. As shown in step S71, the main video data is pre-encoded using the parameters, and the optimal distribution of the code amount is calculated. The main video is encoded based on the code amount distribution obtained by the pre-encoding as shown in step S72. At this time, audio data encoding is also executed at the same time. If necessary as shown in step S73, a partial re-encoding of the main video data is executed, and the main video data in the re-encoded part is replaced. Main video data and audio data are encoded by this series of steps. Also, as shown in steps S74 and S75, the sub-picture data is encoded to generate encoded sub-picture data (Comp Sub-pict). That is, the parameters necessary for encoding the sub-picture data are similarly set. Part of the parameters set as shown in step S74 is the system controller (Sys con) 2
15 and is used by the file formatter (FFMT) 224. The sub-picture data is encoded based on this parameter. By this processing, the sub-picture data is encoded.

According to the flowchart shown in FIG. 26, encoded main video data, audio data and sub video data (Comp Video, Comp Audio, Comp Sub-pict) are encoded.
) Are combined and converted into a file structure of video data as described with reference to FIG. That is, as shown in step S76, the cell 105 as the minimum unit of video data is set, and the cell information table (CIT) 115 is set.
Is created. Next, as shown in step S77, the configuration of the cell 105 that constitutes the sequence 106, the main video, the sub video, the audio attribute, etc. are set (some of these attribute information are information obtained at the time of data encoding). File management information (FMI) including the cell information table (CIT) 115 is created. next,
The main video data, audio data, and sub-video data (Comp Video, encoded as shown in step 78) are encoded.
Comp Audio, Comp Sub-pict) is subdivided into fixed packs and can be played back in the order of time code of each data.
Each data cell is arranged while inserting the DSI pack 92 for each GOP, and the disk information file 76 and the file 78 such as a movie file as shown in FIGS.
Is formatted into a structure. At this time, packing is performed according to the logical sector length described above (FIGS. 16 and 17).
reference).

Note that in the flowchart shown in FIG. 26, the sequence information indicates that the database of the system controller (Sys con) 215 is used in the process of step S77, or data is re-input as necessary. Execute and sequence information table (SIT) 114
Described in.

FIG. 27 shows a disk formatter system for recording the files 76 and 78 formatted as described above on an optical disk. As shown in FIG. 27, in the disk formatter system, these file data are stored in the memories 230 and 232 in which the created information files 76 and files 78 such as movie files are stored, and the volume formatter (VFMT) 23.
6. Volume formatter (VFMT)
In 236, in addition to the files 76 and 78, the volume information 74 of the disc is added in the arrangement order shown in FIG. 4 to create logical data in a state to be recorded on the disc 10. Volume formatter (VFMT) 236
Data for error correction is added to the logical data created in (1) by the disk formatter (DFMT) 238 and reconverted into physical data to be recorded on the disk. In a modulator (Modulator) 240, the physical data created by a disk formatter (DFMT) 238 is converted into recording data to be actually recorded on the disk, and the recording data subjected to the modulation processing is recorded by a recorder (Recoder) 242 on the disk 10 Recorded in.

A standard flow chart for creating the above-mentioned disc will be described with reference to FIGS. 28 and 29. FIG. 28 shows a flowchart for creating logical data to be recorded on the disk 10. That is, as shown in step S80, parameter data such as the number of video data files, the arrangement order, and the size of each video data file is set first. Next, volume information is created from the parameters set as shown in step S81 and the file management information of each video data file. After that, as shown in step S82, the data is arranged in the order of the volume information and the video data file along the corresponding logical block number, and the logical data to be recorded on the disk 10 is created.

After that, a flow chart for creating physical data for recording on the disc as shown in FIG. 29 is executed. That is, as shown in step S83, the logical data is divided into a certain number of bytes, and error correction data is generated. Next, as shown in step S84, the logical data divided into a certain number of bytes and the generated error correction data are combined to create a physical sector. Then, as shown in step S85, physical data is created by combining the physical sectors.

In this way, the physical data generated by the flow chart shown in FIG. 29 is subjected to the modulation processing based on the fixed rule to create the recording data. Then, this recording data is recorded on the disc 10.

A flowchart in which the encoded main video data, audio data, and sub video data (Comp Video, Comp Audio, Comp Sub-pict) described with reference to FIG. 26 are combined and converted into a file structure of video data. In the process of creating one or more sequences, the process of creating sequence information and cell playback order will be described in more detail with reference to FIGS. 30 to 33. 30 and 31 show the relationship between the cell information (CI) regarding the video cell 105 and the sequence information (SI) regarding the sequence 106. It should be noted that FIGS. 30 and 31 are drawn so that the two are joined at corresponding portions to form a single drawing. In addition, FIG. 33 corresponds to FIG. 30 and FIG.
6 is a flowchart showing a process of creating a sequence in the sequence information and cell reproduction order shown in FIG.

Consider the case of creating a sequence (Seq-n) in FIGS. 30 and 31. Using a personal computer, a workstation, or the like, a plurality of video cells are prepared on the hard disk or memory by dividing the video data into units of a required size as shown in step S90 of FIG. 33. It As shown in step S92, the size of each prepared video cell (S
na), playback time (Tna), type (Cn) indicating content, etc.
Information such as a) and the corresponding language code (Lna) is acquired as cell information (Cl). As shown in step S93, each cell information (CI) is collected as a table in the order of description, and a cell information table (CIT) is created. From the cell information table (CIT) created in this way,
As shown in step S94, the sequence (Seq-n
The cell numbers (#n, # n + 1, # n + 2) that make up the sequence are taken out, and the number of sequence forming cells that make up the sequence is determined. Also, the total time of the constituent cells (Tn
The sequence reproduction time is obtained from (a + Tnb + Tnc). As shown in step S95, cell numbers in the cell information table (CI) description order from the reproduction order # 1 are stored in the cell reproduction order list that determines the sequence reproduction order from the number of sequence constituent cells. A cell playback order list is created as shown in D). Information such as the number of cells constituting the sequence, the sequence reproduction time, the cell reproduction order list, and the like described above is collected as sequence information (SI).
#N is configured. Next, the next sequence is similarly created as shown in step S96.

When there are no more sequences to be created, as shown in step S97, all sequence information (SI) are assigned numbers from # 1 in the order of description, stored in the sequence information table (SIT), and the sequence creation is completed. It

Finally, the total number of sequences, the start position of the sequence information table, the start position of each sequence information,
The file is constructed by storing the start position of the cell information table and the like in a predetermined location of the file management table.

As described above, data is recorded in the data area of the optical disc in a hierarchical structure of files, programs, cells, and packs, and each pack has a constant data amount consisting of variable length data and supplementary data. The data amount of each pack is the same as the data amount of a sector which is a recording unit of data on the disc.

As a result, pack data can be efficiently reproduced. Further, since the head of the data recording area of the sector and the head of the pack data coincide with each other, there is no need to search for the head of the pack data, and the data is not read and discarded, which is efficient.

Further, since the data for each pack stored in the data RAM section handled by the system processor section is stored at the same address interval, it can be handled by the pack number, and the start address and end address are stored. There is no need, and processing during data reproduction becomes easy.

In the above-mentioned embodiments, the high density recording type optical disk is explained as the recording medium.
The present invention is directed to a storage medium other than the optical disc, for example,
The present invention can also be applied to a magnetic disk or other physically high-density recordable storage medium.

[0120]

As described above in detail, according to the present invention,
The pack data can be efficiently reproduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an optical disk reproducing apparatus for explaining an embodiment of the present invention.

FIG. 2 is a diagram for explaining the configuration of a disk drive unit.

FIG. 3 is a perspective view for explaining the configuration of an optical disc.

FIG. 4 is a diagram for explaining a recording configuration of an optical disc.

FIG. 5 is a diagram for explaining a volume structure of an optical disc.

FIG. 6 is a diagram for explaining the structure of a disc information file.

FIG. 7 is a diagram for explaining the structure of a video file.

FIG. 8 is a diagram for explaining a hierarchical structure of image data stored in a file.

9 is an explanatory diagram showing 1 GOP forming the video cell shown in FIG. 8. FIG.

FIG. 10 is a diagram for explaining the contents of cell information stored in a cell information table.

FIG. 11 is a diagram for explaining the content of one piece of sequence information stored in a sequence information table.

FIG. 12 is a diagram for explaining parameters recorded in a file management table.

FIG. 13 is a diagram for explaining the structure of a video file.

FIG. 14 is a diagram for explaining an adjustment example when the adjustment data length is 7 bytes or more.

FIG. 15 is a diagram for explaining an adjustment example when the adjustment data length is 6 bytes or less.

FIG. 16 is a diagram for explaining the structure of a pack.

FIG. 17 is a view for explaining the structure of a pack.

FIG. 18 is a view for explaining the structure of a disc search information pack.

FIG. 19 is a diagram for explaining the configuration of a main video pack.

FIG. 20 is a diagram for explaining the configuration of an audio pack.

FIG. 21 is a diagram for explaining the configuration of a sub-picture pack.

FIG. 22 is a block diagram for explaining the configuration of a packet transfer processing unit.

FIG. 23 is a flowchart illustrating a packet transfer process.

FIG. 24 is a block diagram showing an encoder system that encodes video data to generate a video file.

FIG. 25 is a flowchart showing an encoding process shown in FIG. 24.

FIG. 26 is a flowchart of creating a file of video data by combining main video data, audio data, and sub-video data encoded by the flow shown in FIG. 25.

FIG. 27 is a block diagram showing a system of a disc formatter for recording a formatted video file on an optical disc.

28 is a flowchart for creating logical data to be recorded on the disc in the disc formatter shown in FIG. 27. FIG.

FIG. 29 is a flowchart for creating physical data to be recorded on a disc from logical data.

FIG. 30 is an explanatory diagram showing a relationship between cell information and sequence information.

FIG. 31 is an explanatory diagram showing a relationship between cell information and sequence information similarly.

FIG. 32 is an explanatory diagram similarly showing a relationship between cell information and sequence information.

FIG. 33 is a flowchart illustrating a process of creating cell information and sequence information.

[Explanation of symbols]

 4 ... Key operation and display section 6 ... Monitor section 8 ... Speaker section 10 ... Optical disk 30 ... Disk drive section 50 ... System CPU section 52 ... System ROM and RAM 54 ... System processor section 56 ... Data RAM section 58 ... Audio decoder section 60 ... Sub-picture decoder section 62 ... Sub-picture decoder section 64 ... D / A & reproduction processing section 200 ... Packet transfer processing section

Front page continuation (72) Inventor Tomoaki Kurano 70 Yanagicho, Sachi-ku, Kawasaki-shi, Kanagawa, Toshiba Yanagimachi Co., Ltd.

Claims (26)

[Claims] 1. A management area is formed in a partial area of a disk on which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. A plurality of files are formed in the data area. Data is recorded in each file, and data is recorded in a hierarchical structure in which one file is composed of a plurality of programs, one program is composed of a plurality of packs, and each pack is used for variable-length data and supplementary data. And a data amount of each pack is an integral multiple of the data amount of a sector which is a recording unit of data on the disc, and the management area has a file array of the data area. A recording medium characterized in that control data and a program that represent the above, and management data that manages the connection to the pack are recorded. 2. Each pack comprises a pack header for identifying each pack and a packet in which variable length data is recorded, and when the data amount of the packet is less than an integral multiple of the sector length, By increasing the data amount in the stuffing area of the pack header with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is recorded on the disc data. The recording medium according to claim 1, wherein the recording medium is an integral multiple of the data amount of a sector that is a unit. 3. Each pack comprises a packet in which a pack header for identifying each pack and variable-length data are recorded, and when the data amount of the packet is less than an integral multiple of the sector length, Depending on the amount of shortage, either the data amount in the stuffing area of the pack header should be increased by supplementary data, or a padding packet composed of supplementary data should be added to the packet. The recording medium according to claim 1, wherein the data amount of each pack is set to be an integral multiple of the data amount of a sector, which is a unit of recording data on the disc. 4. A management area is formed in a partial area of a disc on which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disc. A plurality of files are formed in the data area. Data is recorded in each file, and data is recorded in a hierarchical structure in which one file is composed of a plurality of programs, one program is composed of a plurality of packs, and each pack is used for variable-length data and supplementary data. The data amount of each pack is the same as the data amount of a sector which is a recording unit of the data of the disc, and the management area includes a file array of the data area. A recording medium characterized in that the control data and the management data for controlling the connection to the pack are recorded. 5. Each pack comprises a pack header for identifying each pack and a packet in which variable length data is recorded. When the data amount of the packet is less than the sector length, the pack header By increasing the data amount of the stuffing area with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is a recording unit of the data of the disc. The recording medium according to claim 4, wherein the data amount is the same as that of the sector. 6. Each pack comprises a packet in which a pack header for identifying each pack and variable-length data are recorded, and when the data amount of the packet is less than the sector length, the shortage amount is recorded. Depending on the selection, either the data amount in the stuffing area of the pack header is increased by supplementary data or a padding packet composed of supplementary data is added to the packet. The recording medium according to claim 4, wherein the data amount of each pack is the same as the data amount of a sector which is a recording unit of the data of the disc. 7. A management area is formed in a partial area of a disk on which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. The data is recorded in a sequence, each sequence is composed of a plurality of programs, one program is composed of a plurality of cells, and one cell is recorded in a hierarchical structure composed of a plurality of packs. The data amount of each pack is an integral multiple of the data amount of a sector which is a recording unit of the data of the disc, and the management area includes: Management data for managing the connection of the sequence, program, cell and pack of the data area is recorded. 8. The pack comprises a packet in which a pack header for identifying each pack and variable-length data are recorded, and when the data amount of the packet is less than an integral multiple of a sector length, By increasing the data amount in the stuffing area of the pack header with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is recorded on the disc data. The recording medium according to claim 7, wherein the recording amount is an integral multiple of the data amount of a sector that is a unit. 9. Each pack comprises a packet in which a pack header for identifying each pack and variable-length data are recorded, and when the data amount of the packet is less than an integral multiple of the sector length, Depending on the amount of shortage, either the data amount in the stuffing area of the pack header should be increased by supplementary data, or a padding packet composed of supplementary data should be added to the packet. 8. The recording medium according to claim 7, wherein the data amount of each pack is set to be an integral multiple of the data amount of a sector, which is a unit of recording data on the disc. 10. A management area is formed in a partial area of a disk in which a predetermined amount of data is recorded in sector units, and a data area is formed in another area of the disk. The data is recorded in a sequence, each sequence is composed of a plurality of programs, one program is composed of a plurality of cells, and one cell is recorded in a hierarchical structure composed of a plurality of packs. The data amount of each pack is the same as the data amount of a sector which is a recording unit of the data of the disc, and the management area includes: A recording medium, wherein management data for managing the sequence of the data area, programs, cells, and connections to packs is recorded. 11. The pack comprises a pack header for identifying each pack and a packet in which variable length data is recorded, and when the data amount of the packet is less than the sector length, the pack header By increasing the data amount of the stuffing area with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is a recording unit of the data of the disc. The recording medium according to claim 10, wherein the recording medium has the same data amount as that of the sector. 12. Each pack comprises a packet in which a pack header for identifying each pack and variable-length data are recorded, and when the data amount of the packet is less than the sector length, the shortage amount is recorded. Depending on the selection, either the data amount in the stuffing area of the pack header is increased by supplementary data or a padding packet composed of supplementary data is added to the packet. The recording medium according to claim 10, wherein the data amount of each pack is the same as the data amount of a sector which is a recording unit of data on the disc. 13. A management area and a data area are formed in a partial area of a disc where a predetermined amount of data is recorded in sector units, and a plurality of programs are recorded in the data area. One program is recorded in a hierarchical structure composed of a plurality of packs, each pack is composed of a fixed amount of data of variable length data and supplementary data, and the data amount of each pack is Management data for managing connection between each program and pack of the data area is recorded in the management area, which is an integral multiple of a data amount of a sector which is a recording unit of disk data. recoding media. 14. The pack comprises a packet in which a pack header for identifying each pack and variable-length data are recorded, and when the data amount of the packet is less than an integral multiple of the sector length, By increasing the data amount in the stuffing area of the pack header with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is recorded on the disc data. 14. The recording medium according to claim 13, wherein the recording amount is an integral multiple of the data amount of a sector that is a unit. 15. Each pack comprises a pack header for identifying each pack and a packet in which variable-length data is recorded, and when the data amount of the packet is less than an integral multiple of the sector length, Depending on the amount of shortage, either the data amount in the stuffing area of the pack header should be increased by supplementary data, or a padding packet composed of supplementary data should be added to the packet. The data amount of each pack is set to be an integral multiple of the data amount of a sector which is a recording unit of data on the disc.
The recording medium described in. 16. A management area and a data area are formed in a partial area of a disk where a predetermined amount of data is recorded in sector units, and a plurality of programs are recorded in the data area. One program is recorded in a hierarchical structure composed of a plurality of packs, each pack is composed of a fixed amount of data of variable length data and supplementary data, and the data amount of each pack is The data amount of a sector, which is a recording unit of data on the disc, is the same. Management data for managing the connection between each program and the pack of the data region is recorded in the management region. recoding media. 17. Each pack comprises a pack header for identifying each pack and a packet in which variable length data is recorded. When the data amount of the packet is less than the sector length, the pack header By increasing the data amount of the stuffing area with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is a recording unit of the data of the disc. The recording medium according to claim 16, wherein the data amount is the same as that of the sector. 18. Each pack comprises a pack header for identifying each pack and a packet in which variable length data is recorded, and when the data amount of the packet is less than the sector length, the shortage amount is recorded. Depending on the selection, either the data amount in the stuffing area of the pack header is increased by supplementary data or a padding packet composed of supplementary data is added to the packet. The recording medium according to claim 16, wherein the data amount of each pack is the same as the data amount of a sector which is a recording unit of data on the disc. 19. A predetermined amount of data is recorded in sector units, a management area is formed in a part of the area, and a data area is formed in another area, and the data is recorded in a plurality of sequences in the data area. In a recording medium recorded in a hierarchical structure in which each sequence is composed of a plurality of programs, one program is composed of a plurality of cells, and one cell is composed of a plurality of packs, variable length data is accepted. The data amount of the replenishment data is determined based on the difference between the data amount of the variable-length data and the data amount of the sector, which is the recording unit of the data of the recording medium, and the replenishment data of the determined data amount A recording method comprising forming a pack from the variable length data and recording the formed pack in a sector of the recording medium. 20. Each pack comprises a pack header for identifying each pack and a packet in which variable-length data is recorded. When the data amount of the packet is less than the sector length, the pack header is By increasing the data amount of the stuffing area with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is a recording unit of the data of the disc. 20. The recording method according to claim 19, wherein the amount of data in a sector is an integral multiple. 21. Each pack is composed of a packet in which a pack header for identifying each pack and variable-length data are recorded, and when the data amount of the packet is less than the sector length, the shortage amount is recorded. Depending on the selection, either the data amount in the stuffing area of the pack header is increased by supplementary data or a padding packet composed of supplementary data is added to the packet. 20. The recording method according to claim 19, wherein the data amount of each pack is set to an integral multiple of the data amount of a sector, which is a unit for recording data on the disc. 22. A management area is formed in a part of the area, and a data area is formed in another area, and the data is recorded in a plurality of sequences in the data area, and each sequence is composed of a plurality of programs. A recording device that records a predetermined amount of data in sector units on a recording medium in which one program consists of multiple cells and one cell consists of multiple packs, and that accepts variable-length data A receiving means and a judging means for judging the data amount of the supplementary data based on the difference between the data amount of the variable-length data received by the receiving means and the data amount of the sector which is the recording unit of the data of the recording medium. Forming means for forming a pack from the supplementary data of the data amount judged by the judging means and the variable length data, and the forming means The pack form recording apparatus characterized by comprising a recording means for recording the sector of the recording medium. 23. Each pack comprises a pack header for identifying each pack and a packet in which variable length data is recorded, and when the data amount of the packet is less than a sector length, the pack header By increasing the data amount of the stuffing area with supplementary data, or by adding a padding packet composed of supplementary data to the packet, the data amount of each pack is a recording unit of the data of the disc. 23. The recording device according to claim 22, wherein the recording amount is an integral multiple of the data amount of the sector. 24. Each of the packs is composed of a packet in which a pack header for identifying each pack and variable length data are recorded, and when the data amount of the packet is less than the sector length, the shortage amount is recorded. Depending on the selection, either the data amount in the stuffing area of the pack header is increased by supplementary data or a padding packet composed of supplementary data is added to the packet. 23. The recording apparatus according to claim 22, wherein the data amount of each pack is set to be an integral multiple of the data amount of a sector, which is a recording unit of data on the disc. 25. A management area is formed in a part of the area, and a data area is formed in another area. Data is recorded in a plurality of sequences in the data area, and each sequence is composed of a plurality of programs. One program is composed of a plurality of cells, one cell is recorded in a hierarchical structure composed of a plurality of packs, and each of the main video data, audio data, sub-picture data, and disk search information data is stored in the pack. In reproducing a recording medium having data indicating a data type and data indicating a data length and recording a predetermined amount of data in sector units, the pack data in sector units of the recording medium is read, Depending on the read pack data, the data types are main video data, audio data, sub video data, and data. It is determined which of the search information data is the data length, the data length is determined, the data of the determined data length in the read pack data is extracted, and the determined data is compared with the extracted data. A reproduction method characterized by performing demodulation corresponding to the type and reproducing and outputting the demodulated data. 26. A management area is formed in a part of the area, and a data area is formed in another area, and the data is recorded in a plurality of sequences in the data area, and each sequence is composed of a plurality of programs. One program is composed of a plurality of cells, one cell is recorded in a hierarchical structure composed of a plurality of packs, and each of the main video data, audio data, sub-picture data, and disk search information data is stored in the pack. A reproducing apparatus for reproducing a recording medium having data indicating a data type and data indicating a data length, and further recording a predetermined amount of data in units of sectors, reads pack data in units of sectors of the recording medium. The reading means and the pack data read by the reading means determines the data type as main video data, audio Data, sub-picture data, and disc search information data, and determining means for determining the data length, and data having the data length determined by the determining means in the pack data read by the reading means. Extracting means for extracting, demodulating means for demodulating the data extracted by the extracting means in accordance with the data type judged by the judging means, and output means for reproducing and outputting the data demodulated by the demodulating means. A reproducing apparatus comprising: