JP3389233B2 - Information recording medium, information recording / reproducing apparatus and method, information reproducing apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium, an information recording / reproducing apparatus and method, and an information reproducing apparatus effective for use in, for example, a DVD (digital video disc) recording / reproducing apparatus.

[0002]

2. Description of the Related Art In recent years, a moving picture compatible optical disk reproducing apparatus for reproducing an optical disk on which data such as video and audio is recorded has been developed. It is popular.

Among them, currently, the international standardized MPEG
2 (Moving Image Coding Expert Group) system is used, and the DVD standard which adopted the AC3 audio compression system was proposed.

According to the MPEG2 system layer, this standard supports MPEG2 as a moving picture compression method, AC3 audio and MPEG audio as voice, and further sub-picture data obtained by run-length compression of bitmap data for subtitles, fast-forward rewind, etc. Special playback control data (navi pack) is added. Also, in this standard, ISO9660 and micro UDF are provided so that data can be read by a computer.
Supports.

[0005]

At the present time, DVDs are also used.
-An optical disk, such as a RAM, in which data can be written and rewritten has also been developed. Such a DVD-
The RAM is required to have a function that allows the user to easily edit it. However, at present, there is no recording / reproducing apparatus for general household use which a user can easily handle for editing.

Therefore, an object of the present invention is to provide a recording method and a recording medium which facilitates user's editing work and enables fine-tuned editing work.

[0007]

According to the present invention, in a recording medium capable of recording video information, the video information is included.
Video object bi for managing the video information recorded in the (VOB) and the video object (VOB)
A video manager (VMG) can be recorded, and the video object (VOB) is a plurality of video objects.
Video unit, including a video unit (VOBU)
The video unit (VOBU) includes a pack (V_PCK) including the video information and a pack (A_P) including audio information.
CK) only contains the, the video object unit (VO
In the video packs located at the head of the BU) (V_PCK), have a system header between the pack header and packet header, the video object unit (VOB
U) Defines a cell (CELL) that determines the range containing multiple
The video manager (VMG) is
A program (PG) in which a plurality of cells (CELL) are connected based on cell information (CI) about the cell (CELL )
Original program chain information consisting of (O
RG_PGCI) , and the original program chain information (ORG_PGCI) includes the program
Program information (PGI ) regarding the program (PG) is included, and the program information (PGI) includes information (PG_TY) indicating the program type.
G_TY) is set by the corresponding program (PG) to be erased.
Including the information to specify the part of the program (PG)
When setting erase, one of the ends of the setting range
As a result of the determination that it is in a cell (CELL),
Cell to be erased, the cell to be erased (CELL) is determined.
The beginning of the specified range is the video object unit
(VOBU) is divided so that it becomes the head of (VOBU).
The cell information (CI) of each cell that has been created is also managed by the above video management.
It is based on the fact that it has been added to the virtual machine (VMG) .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of a disk recording / reproducing apparatus according to an embodiment of the present invention. In Figure 2,
FIG. 3 shows the correspondence relationship between the data recording area of the optical disc (DVD-RAM) of FIG. 1 and the recording track of the data recorded therein. FIG. 3 shows the information recorded on the optical disc of FIG. The content of the volume space of the video) shows an example of a hierarchical structure.

First, the optical disc will be described. Figure 2
In the above, the optical disc 10 has a structure in which the pair of transparent substrates 14 provided with the recording layer 17 are bonded together by the adhesive layer 20. Each substrate 14 is molded of polycarbonate having a thickness of 0.6 mm, and the adhesive layer 20 is made of, for example, an ultraviolet curable resin having a thickness of 40 μm. These pair of substrates 14
Are laminated so that the recording layer 17 is in contact with the surface of the adhesive layer 20 to form the large-capacity optical disk 10 having a thickness of 1.2 mm. Reference numeral 22 is a central hole, and 24 is a clamp area. Reference numeral 25 is an information area, 26 is a lead-out area, 27 is a lead-in area, and 28 is a data recording area. Recording tracks are continuously formed in a spiral shape on the recording layer of the information area 25, for example. The continuous track is divided into physical sectors, and the sectors are numbered consecutively. This sector is used as a recording unit.

In FIG. 3, the disk 10 is a DVD-R.
In the case of AM (or DVD-R), the disc 10 is stored in a cartridge. DVD-RAM disk 10
When the cartridge 11 is loaded in the disc recording / reproducing apparatus in the state of being housed in the cartridge 11, and the cartridge 11 is pulled out, only the disc 10 remains in the recording / reproducing apparatus. The data recording track of the recording layer 17 is divided into a plurality of logical sectors (minimum recording unit) having a fixed storage capacity,
The data output based on this logical sector is recorded. The recording capacity of one logical sector is the same as one pack data length, 20
It is set to 48 bytes.

FIG. 4 has the structure of the information area 25. The logical format of this structure is defined in accordance with, for example, one of the standards, ISO9660 and Universal Disc Format (UDF) Bridge.

The data recording area 28 is allocated as a volume space, and the volume space 28 is
Space for volume and file structure information (volume / file structure), space for DVD standard application (DVD video area), and space for other than this standard application (other recording area)
including. The volume space 28 is physically divided into a large number of sectors, and the physical sectors are numbered consecutively. The logical address of the data recorded in this volume space 28 means the logical sector number as defined by ISO9660 and UDF bridge.
The logical sector size here is 2048 bytes like the effective data size of the physical sector. Serial numbers are added to the logical sector numbers in ascending order of the physical sector numbers. Note that unlike the logical sector, redundant information such as error correction information is added to the physical sector.

The volume space 28 has a hierarchical structure and includes a volume / file structure area, a DVD video area composed of one or more video title sets VTS # n, and other recording areas. These areas are divided on the boundaries of logical sectors. One logical sector is 204
It is defined as 8 bytes, and one logical block is also defined as 2048 bytes. Therefore, one logical sector is defined as one logical block.

The volume / file structure area is ISO
It corresponds to the management area defined in 9660 and the UDF bridge. Based on the description in this area, the contents of the video manager VMG are stored in the system memory (not shown) inside the DVD video recorder.

The video manager VMG is composed of a plurality of files. Information (video manager information VMGI, video object set VMGM_VOBS for video manager menu, video manager information backup file VMGI_BUP) for managing the video title sets (VTS # 1 to #n) is described in the file.

Each video title set VTS has an MP
Video data compressed according to the EG standard (video pack described later), audio data compressed or not compressed according to a predetermined standard (audio pack described later), and run-length-compressed sub-picture data (sub-picture pack described later; 1) A pixel includes bitmap data defined by a plurality of bits, and information for reproducing these data (navigation pack described later; presentation control information PCI and data search information DS).
(Including I) is stored.

The video title set VTS is also composed of a plurality of files, like the video manager VMG. Each file has video title set information VTS
I, video title set menu object set VTSM_VOBS, video title set title video object set VTSTT_VOBS, video title set information backup VTSI_BU
Contains P.

In the other recording area, information usable in the above-mentioned video title set VTS or other information not related to the video title set can be recorded. This area is not mandatory.

Video Title Set Title video object set VTSTT_VOBS defines a group of one or more video objects VOBs. Each V
OB defines a collection of one or more cells. And
A program chain P is created by a group of one or more cells.
The GC is constructed.

If one PGC is compared to one drama,
The plurality of cells forming this PGC can be interpreted as corresponding to various scenes in the drama. The contents of this PGC (or the contents of the cell) are determined, for example, by the software provider who produces the contents recorded on the disc 10.

FIG. 5 exemplifies the directory structure of information (data file) recorded on the optical disc 10. Video title set V under the root directory
TS subdirectory and audio title set A
The sub directories of TS are connected. Then, in the sub-directory of the video title set VTS, various video files (VMGI, VMGM, VTSI, V
Files such as TSM and VTS) are arranged so that each file is managed in an orderly manner. A particular file (eg a particular VTS) can be accessed by specifying the path from the root directory to that file.

The DVD-RAM (DVD-RW) disc 10 or the DVD-R disc 10 is pre-formatted so as to have the above directory structure, and the pre-formatted disc 10 is an unused disc for recording a DVD video. It can be marketed as (raw disc).

That is, the root directory of the pre-formatted raw disc 10 includes a subdirectory called a video title set (VTS). This subdirectory contains various management data files (VIDE
O_TS. IFO, VTS_01_0. IFO) and backup files (VIDEO_TS.BUP, VT) that back up the information of these management data files.
S_01_0. BUP), and a video data file (VTS) that is managed based on the description content of the management data file and that stores digital moving image information.
_01_1. VOB).

The sub-directory is a menu data file (VMG) for storing predetermined menu information.
M, VTSM) may be further included.

Further, the title corresponds to, for example, one movie, and one disc contains a plurality of titles. A collection of these titles is called a title set, and this title set is composed of a plurality of files.

In addition, a file called a video manager (hereinafter referred to as VMG) is present on one disc as information for managing this disc. Further, in the title set (hereinafter referred to as VTS), information for managing this title set includes a management information file of video title set information (hereinafter referred to as VTSI), a video file composed of video data, and a VTSI. Backup file.

FIG. 6 shows a video object set VTS.
5 shows a hierarchical structure of information included in TT_VOBS.

Each cell 84 is composed of one or more video object units (VOBU). And each V
The OBU has a navigation pack (NV pack) as a head, and is configured as a group (pack row) of a video pack (V pack), a sub-picture pack (SP pack), and an audio pack (A pack). That is, VOB
U is defined as a set of all packs recorded from one NV pack to immediately before the next NV pack.

These packs are the minimum unit for performing data transfer processing. Further, the minimum unit for performing logical processing is a cell unit, and the logical processing is performed in this cell unit.

The NV pack is incorporated in the VOBU so that any angle change (non-seamless reproduction and seamless reproduction) can be realized.

The reproduction time of the VOBU corresponds to the reproduction time of video data composed of one or more video groups (group of pictures GOP) included in the VOBU, and the reproduction time is 0.4 seconds to 1. It is set within the range of 2 seconds. 1 GOP is screen data that is normally about 0.5 seconds according to the MPEG standard and is compressed so as to reproduce about 15 images during that time.

It should be noted that, even in the reproduction data of only audio and / or sub-picture data, the reproduction data is constituted with VOBU as one unit.

By the way, in the DVD video recorder capable of recording the video title set VTS including the VOBS of this structure on the optical disc 10, there may be a case where it is desired to edit the recorded contents after recording the VTS. In order to respond to this request, a dummy pack can be appropriately inserted into each VOBU. This dummy pack can be used when recording editing data later.

The VOBS for the menu is usually one V
The OB is composed of a plurality of menu screen display data. On the other hand, a VOBS for a title set is usually composed of a plurality of VOBs.

The VOB has an identification number (IDN # i; i =
0 to i) are added, and the VOB can be specified by this identification number. A normal video stream is composed of a plurality of cells, but a menu video stream may be composed of one cell. V in each cell
The identification number (C_IDN # j) is added as in the case of OB.

As described above, the video file has a hierarchical structure, one file is composed of a plurality of program chains, one program chain is composed of a plurality of programs, and one program is It is composed of a plurality of cells, and one cell is composed of a plurality of video object units. Also, VOBU
Is composed of a pack of data of various types. A pack is composed of one or more packets and a pack header.

Also, this video object (VOB)
Corresponds to the management data PGCI in units of PGC.
This PGCI has a cell playback information table (C_PBIT) for managing cells, and the cell playback order is C
Playback is performed in the order described in _PBIT, and the playback address of the actual cell is recorded as cell playback information (C_PBI) in C_PBIT.

Although the DVD video is managed by the above method, it is possible that the PGC management information and the cell management information are independent.

A pack is the minimum unit for performing data transfer processing. Furthermore, the minimum unit for performing logical processing is the cell unit, and the logical processing is performed in this unit.

FIG. 7 illustrates a pack row. This pack row is composed of a navigation pack (control pack), a video pack, a dummy pack, a sub-picture pack and an audio pack.

The navigation pack has a pack header 1.
10. Playback control information / presentation control information (P
CI) Packet 116 and data retrieval information (DSI)
It contains packet 117. The PCI packet 116 is composed of a packet header 112 and PCI data 113, and the DSI packet 117 is composed of a packet header 114 and DSI data 115. The PCI packet 116 includes control data used when switching the non-seamless angle, and the DSI packet 117 includes control data used when switching the seamless angle. Here, the angle switching means changing the angle at which the subject image is viewed (camera angle).

The video pack is composed of a pack header 881 and video packets 882. The dummy pack includes a pack header 891 and a putting packet 890.
The padding packet 890 includes a packet header 892 and padding data 893. However, padding data 893 contains invalid data.

The sub-picture pack is composed of a pack header 901 and a sub-picture packet 902. The audio pack is composed of a pack header 911 and an audio packet 912.

The video packet 882 includes a packet header (not shown), and a decoding time stamp (DST) and a presentation time stamp (PTS) are recorded in this packet header. Also, the sub-picture packet 902 and the audio packet 912
Each include a packet header (not shown), and a presentation time stamp (PTS) is recorded in these packet headers.

FIG. 8 shows the structure of one navigation pack.

The navigation pack has a pack header 1
10, system header 111 and two packets (1
16 and 117), and is composed of 2010 bytes of navigation data.

The PCI packet 116 has a packet header 112A, a substream ID 112B, and a PCI.
It is composed of data 113. Substream ID 112
The 8-bit code of B designates the data stream of the PCI data 113.

The DSI packet 117 is composed of a packet header 114A, a substream ID 114B, and DSI data 115. Substream ID
The 8-bit code of 114B specifies the data stream of the DSI data 115.

The pack header 110 and the system header 111 in the figure are defined by the MPEG2 system layer. Similarly, the packet header 1 of the PCI packet 116
12A and packet header 1 of DSI packet 117
A packet start code, a packet length, and a stream ID are stored in 14A as defined in the MPEG2 system layer.

FIG. 9 shows the PCI packet 116 included in the navigation pack placed at the head of each VOBU. The PCI packet 116 includes PCI data 113 which is navigation data for changing the display content or the reproduction content (presentation content) in synchronization with the reproduction state of the video data in the VOBU.

FIG. 10 shows the contents of PCI data. P
CI data includes PCI general information (PCI_GI) and non-seamless playback angle information (NSML_AGL).
I), highlight information (HLI), and recording information (RE
CI) is included. The record information (RECI) can include an international standard copyright control code (ISRC).

FIG. 11 shows reproduction control information general information PCI_
The contents of GI are shown.

The reproduction control information general information PCI_GI includes the logical block number (NV__) of the navigation pack.
PCK_LBN) and VOBU category (VOBU
_CAT) and user operation control of VOBU (VOBU_
UOP_CTL) and VOBU display start time (VOB
U_S_PTM) and VOBU display end time (VOB
U_E_PTM), a display end time (VOBU_SE_PTM) at the end of the sequence in VOBU, and a cell elapsed time (C_ELTM) are described.

Here, the logical block number (NV_P
CK_LBN is the address (recording position) of the navigation pack containing the reproduction control information (PCI), and the video object set (VOB) containing the PCI.
It is shown by the relative block number from the first logical block of S).

VOBU_CAT is reproduction control information (PC
The contents of the copy protection of the analog signal corresponding to the video and sub-picture in the VOBU including I) are described. VOBU_UOP_CTL describes a user operation prohibited during the display (presentation) period of the VOBU including the reproduction control information (PCI). VOBU_S_PTM is reproduction control information (PC
Display of VOBU including I) (presentation)
It describes the start time. More specifically,
This VOBU_S_PTM is the first GO in the VOBU.
First video (first picture) in P display order
Indicates the display start time of.

VOBU_E_PTM describes the display (presentation) end time of the VOBU containing the reproduction control information (PCI). More specifically, when the video data in VOBU is continuous, this VOBU_E_PTM indicates the display end time of the last video (last picture) in the display order of the last GOP in VOBU.

On the other hand, when there is no video data in the VOBU, or when the reproduction of the VOBU is stopped, this VOBU_E_PTM is virtually aligned with the time grid of the field interval (1/60 seconds for NTSC video). To indicate the end time of the typical video data.

VOBU_SE_PTM describes the display (presentation) end time by the sequence end code of the video data in the VOBU containing the reproduction control information (PCI). More specifically, it refers to the display end time of the last video (last picture) in the display order, which includes the sequence end code in VOBU. If there is no video (picture) with sequence end code in VOBU, VO
00000000h (h means hexadecimal) is entered into BU_SE_PTM.

C_ELTM is the reproduction control information (PC
I) the relative display (presentation) time from the first video frame in the display order of the cell including this to the last video frame in the display order of the VOBU including this PCI, in hours, minutes and seconds in BCD format. And frame. When there is no video data in VOBU, the first video frame of the virtual video data is used as the video frame.

FIG. 12 shows the contents of the video title set VTS. This video title set VTS is composed of a plurality of files. Each file includes video title set information (VTSI), video title set menu object set (VTSM_VOB).
S), video title set title video object set (VTSTT_VOBS; maximum 9 files), video title set information backup (VT
SI_BUP).

The video title set information VTSI arranged at the head of the VTS includes a video title set information management table (VTSI_MAT; indispensable) and a title search pointer table for a part of title (for example, a program chapter) of the video title set. (VTS_PTT_SRPT; required) and the program chain information table (VTS_PTT) of the video title set.
PGCIT (required) and the program chain information unit table (VTS) for the video title set menu.
M_PGCI_UT; required when VTSM_VOBS exists), video title set time map table (VTS_TMAPT; option), cell address table for video title set menu (VT
SM_C_ADT; required when VTSM_VOBS exists) and video object unit address map (VTSM_VO) for the video title set menu.
BU_ADMAP; required when VTSM_VOBS exists), video title set cell address table (VTS_C_ADT; required), and video object unit address map for video title set (VTS_VOBU_ADMAP; required) are described in this order. .

The contents of the above-mentioned video title set information management table VTSI_MAT are as follows.

The video title set information management table VTSI_MAT indicates the video title set identifier, the end address of the video title set, and whether or not the program recorded on the optical disk 10 has been completely reproduced even once. Archive flag (ARCHIVE_FLAG; fulfills the function of preventing erroneous erasure when the program recorded on the optical disk 10 is to be left without being erased). This flag is omitted and replaced with a cell-based flag described later. End) of the video title set information, the version number of the standard adopted by the corresponding optical disc 10, the category of the video title set, the end address of the video title set information management table, and the video title set information. And the start address of the video object set-menu, start address of the video object set of the video title set title is described.

Furthermore, the start address (VTS_PTT_SRP) of the part-of-title search pointer table is set so that a part of the video title set can be searched.
T_SA), the start address (VTS_PGCIT_SA) of the program chain information table that sets the playback order of the video title set, and the start address (VTSM_P) of the unit table of the program chain information for the display control of the menu of the video title set.
GCI_UT_SA), a start address (VTS_TMAPT_SA) of the time map table showing the elapsed time of the video title set, and a start address (VTSM_C_ADT_SA) of the cell address table of the cell for displaying the menu of the video title set,
Start address (VTSM_VOBU) of address map of VOBU for displaying menu of video title set
_ADMAP_SA) and the start address (VTS_C_A) of the cell address table of the video title set.
DT_SA) and the start address (VTS_VOBU_) of the address map of VOBU of the video title set.
ADMAP_SA), information such as video, audio and sub-picture attributes, the number of sub-picture streams of the video title set, the sub-picture stream attribute table of the video title set, and the multi-channel audio stream attribute table of the video title set. Have been described.

FIG. 13 shows the contents of the video title set program chain information table VTSI_PGCIT.

This video title set program chain information table VTS_PGCIT contains video title set program chain information table information (V
TS_PGCITI) and video title set program chain information search pointer (VTS_PGCI_)
SRP # 1 to VTS_PGCI_SRP # n) and video title set program chain information (VTS_P
GCI) is included.

The order of a plurality of video title set program chain information VTS_PGCI provided is as follows.
Multiple video title set program chain information search pointers VTS_PGCI_SRP # 1 to VTS_
It is set regardless of the order of PGCI_SRP # n. Therefore, for example, the same program chain information VTS_PGCI can be pointed by one or more program chain information search pointers VTS_PGCI_SRP.

FIG. 14 shows the contents of the video title set program chain information VTS_PGCI. The program chain information (PGCI) includes general program chain information (PGC_GI; essential), program chain command table (PGC_CMDT; option),
Program Chain Program Map (PGC_PGM
AP; indispensable when the next C_PBIT exists, cell playback information table (C_PBIT; option), and cell position information table (C_POSIT; C_P above)
(Required when BIT exists).

FIG. 15 shows a cell reproduction information table C_PB.
Indicates the contents of IT. This cell playback information table C_PB
IT is a maximum of 255 pieces of cell reproduction information (C_PBIn;
# N = # 1 to # 255) are included.

FIG. 16 shows cell reproduction information C_PBI (C_
The contents of PBI # 1 to #n) are shown. That is, each C_P
BI is a cell category (C_CAT; 4 bytes), cell playback time (C_PBTM; 4 bytes), start address of the first video object unit (VOBU) in the cell (C_FVOBU_SA; 4 bytes), first interleaved in the cell. End address (C_FILVU_EA; 4 bytes) of unit (ILVU), start address (C_LVOBU_SA; 4 bytes) of last video object unit (VOBU) in cell,
And the final video object unit (VO
BU) end address (C_LVOBU_EA; 4 bytes).

Particularly, in this C_PBI, an area for providing an erasure prohibition flag is reserved at the relative byte position (RBP). When 0 is written in the area where the erase prohibition flag is provided, it can be erased freely, but 1
When is described, it means permanent preservation. This description can be freely made by the user.

FIG. 17 shows the contents of the cell category C_CAT. This C_CAT is the lower 8 bits (b0 to b
7) indicates the number of cell commands, and the next 8 bits (b8 to b)
15) indicates the cell still time, and the next 5 bits (b16
~ B20) indicates a cell type (for example, karaoke or other), the next 1 bit (b21) indicates an access restriction flag, and the next 1 bit (b22) indicates a cell reproduction mode (for example, moving image or still). , A reserved bit is skipped, the next 1 bit (b24) indicates a seamless angle change flag, the next 1 bit (b25) indicates a discontinuity flag (whether or not to reset STC) of the system time clock STC, The 1-bit (b26) indicates an interleave arrangement flag (whether the cell designated by C_PBI is in a continuous block or in an interleaved block), and the next 1-bit (b27)
Indicates a seamless playback flag (whether or not the cell specified by C_PBI should be seamlessly played).
Bits (b28 to b29) indicate the cell block type (for example, whether it is an angle block), and the last 2 bits (b30 to b31) indicate the cell block mode (for example, whether it is the first cell in the block). There is.

Here, the cell block mode is 00b (b
Indicates that it is not a cell in the block, 01b indicates that it is the first cell in the block, and 10b indicates that it is a cell in the block. , It is the last cell in the block when it is 11b.

When the cell block type is 00b, it indicates that the cell block is not a part of the corresponding block, and it is 01
When it is b, it indicates that the corresponding block is an angle block (a block including a multi-angle cell).

On the other hand, if this cell block type = 01b is detected during reproduction, it is indicated that the angle block is currently being reproduced by blinking an angle mark (not shown) (or changing the lighting color or changing the shape of the angle mark). Can notify the viewer. As a result, the viewer can know that the image currently being reproduced can be reproduced at a different angle.

When the interleaved arrangement flag is 0b, it indicates that the corresponding cell is in a continuous block (a plurality of VOBUs are continuously recorded). When the interleaved arrangement flag is 1b, the corresponding cell is interleaved. Block (ILVU each containing one or more VOBUs
Is interleaved and recorded).

Further, when the seamless angle change flag is set (= 1b), it indicates that the corresponding cell is a target of seamless reproduction, and this flag is not set (=).
0b) indicates that the corresponding cell is the target of non-seamless reproduction.

That is, the interleave arrangement flag = 1
When the seamless angle change flag = 0b in b, the non-seamless angle changeable state is set, and when the interleave arrangement flag = 1b, the seamless angle change flag = 1.
In the case of b, the seamless angle can be changed.

A media drive system having an extremely short access time (a system capable of accessing the beginning of a desired angle block within one frame period of video;
(Not necessarily limited to the optical disc drive system) is used, interleave arrangement flag = 0b,
That is, a quick angle change can be realized between a set of VOBUs (separate angle cells) that are not interleave-recorded.

Optical disk 10 having a relatively low access speed
When used as a recording medium, it is preferable to allocate one recording track of the disc for recording one interleaved block. Then jump between adjacent interleaved blocks (angle change)
Sometimes, the tracing destination of the optical head needs to be finely moved by one track in the radial direction of the disk, so that a track jump (suitable for seamless angle change) with almost no time lag becomes possible. In this case, if a track jump for one video object unit (VOBU) is performed, a maximum time lag for one rotation of the disc may occur. Therefore, the angle change accompanied by the jump in VOBU units is suitable for the non-seamless angle change.

After reading the cell data of the title set from the optical disc, the contents of the seamless angle change flag in the read data can be arbitrarily changed by the viewer (the user of the DVD video recorder described later) so that the DV can be changed.
It is possible to configure a D-video recorder.

The seamless angle change flag is a flag indicating whether the angle information (not shown) described in the navigation pack 86 is seamless angle or non-seamless angle. Therefore, when this flag is changed, the navigation pack 86 is changed. It becomes necessary to correct the angle information (not shown) in (for example, change from seamless angle information to non-seamless angle information).

When the cell reproduction mode is 0b, continuous reproduction is performed in the cell, and when it is 1b, still reproduction is performed in each VOBU existing in the cell.

When the user performs recording / playback, etc., the access restriction flag can be used to prohibit direct selection by user operation. For example, by setting the access restriction flag of the cell in which the answers to the questions are recorded to 1b, it is possible to prohibit the user from pinching the answers to the questions.

The cell type can indicate the following depending on the contents of the 5 bits when the corresponding cell is created for karaoke, for example.

That is, if 00000b, the cell type is not designated, if it is 00001b, the title image of karaoke is designated, if it is 00010b, the intro of karaoke is designated, and if it is 00011b, the climax (rust).
Is designated as 00100b, the first climax singing portion is designated, and 00101b is designated as the second climax singing portion.
If it is 0b, the vocal part of the male vocal is designated,
If it is 1b, the singer part of female vocal is specified, and 0100
If it is 0b, the singing part of the mixed voice of men and women is designated, and 01
If it is 001b, the interlude (playing only the musical instrument) part is designated, if it is 01010b, the fade-in of the interlude is designated, if it is 010111b, the fade-out of the interlude is designated, if it is 01100b, the first ending performance part is designated, and if it is 01101b. The second ending performance part is designated. The content of the remaining 5-bit code can be used for other purposes.

The angle change can also be applied to the angle change of the background video of karaoke. (For example, a full-length image of a singer singing a guide vocal, a close-up image of the face, a close-up image of the mouth, etc. can be seamlessly followed along the flow of karaoke music, or it can go backwards a short time to be non-seamless, and even between desired bars. The angle can be changed as desired by the viewer during repeat playback.) When the 8-bit content of the cell still time is 00000000b, it is specified that it is not a still, and when it is 11111111b, the timeless still is specified. , It's 00000
In the case of 001b to 11111110b, the still display of the length in which the decimal number (1 to 254) designated by this content is displayed for the number of seconds is designated. The cell command number indicates the number of commands to be executed at the end of reproduction of the corresponding cell.

FIG. 18 shows the program chain general information P.
Indicates the contents of GC_GI.

Program chain general information PGC_GI
Contains the contents of the program chain (PGC_CNT)
And the playback time of the program chain (PGC_PB_T
M) and program chain user operation control information (P
GC_UOP_CTL) and a program chain audio stream control table (PGC_AST_CT)
LT), the control table (PGC_SPST_CTLT) of the program chain sub-picture stream, and the navigation control information (PGC_NV_) of the program chain.
CTL) and the program chain sub-picture palette (P
GC_SP_PLT) and the program chain command table start address (PGC_CMDT_SA)
, The start address of the program map of the program chain (PGC_PGMAP_SA), and the start address of the playback information table of the cells in the program chain (C_
PBIT_SA) and the start address (C_POSIT_S) of the position information table of the cells in the program chain.
A) is described.

Contents of program chain PGC_CNT
Indicates the number of programs and the number of cells (maximum 255) in the program chain. Video object VOB
The number of programs is “0” in the program chain without
Becomes

Play time of program chain PGC_P
B_TM indicates the total playing time of the programs in the program chain in hours, minutes, seconds, and the number of video frames. This PGC_PB_TM has a flag (tc_flag) indicating the type of video frame.
The frame rate (25 frames per second or 30 frames per second) and the like are designated by the content of this flag.

The user operation control information PGC_UOP_CTL of the program chain indicates the user operation prohibited in the program chain being reproduced.

The control table PGC_AST_CTLT of the program chain audio stream may include control information of each of the eight audio streams. Each of these pieces of control information includes a flag (availability flag) indicating whether or not the audio stream is available in the program chain and conversion information from the audio stream number to the audio stream number to be decoded.

The program chain sub-picture stream control table PGC_SPST_CTLT has a flag (availability flag) indicating whether the sub-picture stream is available in the program chain and a sub-picture to be decoded from the sub-picture stream number (32). It contains conversion information for stream numbers.

The navigation control information PGC_NV_CTL of the program chain includes Next_PGCN indicating the program chain number to be reproduced next to the program chain currently being reproduced, and the navigation command “L”.
"inkPrevPGC" or "PrevPGC_S
"Previous_PGCN" indicating the program chain number (PGCN) quoted by "each ()"
And GoUp_PGCN indicating the program chain number to be returned from the program chain, and PG Playback indicating the program reproduction mode (sequential reproduction, random reproduction, shuffle reproduction, etc.).
It includes a mode and a Still time value indicating the still time after reproduction of the program chain.

Program chain sub-picture palette PG
C_SP_PLT describes 16 sets of luminance signals and two color difference signals used in the sub-picture stream in the program chain.

The start address PGC_CMDT_SA of the command table of the program chain is a description area for a pre-command executed before PGC reproduction, a post command executed after PGC reproduction and a cell command executed after cell reproduction.

The start address PGC_PGMAP_SA of the program map of the program chain describes the start address of the program map PGC_PGMAP showing the structure of the program in the program chain, as a relative address from the first byte of the program chain information PGCI. .

The start address C_PBIT_SA of the reproduction information table of the cells in the program chain is the relative start address of the cell reproduction information table C_PBIT that determines the reproduction order of the cells in the program chain from the first byte of the program chain information PGCI. It is described by address.

The start address C_POSIT_SA of the cell position information table in the program chain is the cell position information table C_POSI indicating the VOB identification number and the cell identification number used in the program chain.
The start address of T is the program chain information PGCI
It is described by the relative address from the first byte of.

Returning to FIG. 1, the disk recording / reproducing apparatus will be described.

FIG. 1 exemplifies the configuration of a device (DVD video recorder) for recording / reproducing digital moving image information at a variable recording rate by using the information having the above structure.

The device body of the DVD video recorder is DV
The D-RAM or DVD-R disc 10 is rotationally driven, and has a disc drive unit 32 for reading / writing information from / to this disc 10. Further, it has an encoder section 50 which constitutes the recording side, a decoder section 60 which constitutes the reproduction side, and a microcomputer block 30 which controls the operation of the apparatus main body.

The encoder section 50 includes an ADC (analog
A digital converter) 51, a selector (SEL) 52,
Video encoder (V-EN) 53, audio encoder (A-EN) 54, and sub-picture encoder (SP-
EN) 55, formatter 56, and buffer memory 5
7 and 7.

In the ADC 51, the external analog video signal from the AV input section 42 and the external analog audio signal,
Alternatively, the analog TV signal + analog audio signal from the TV tuner 44 is input. The ADC 51 digitizes the input analog video signal with, for example, a sampling frequency of 13.5 MHz and a quantization bit number of 8 bits. (That is, each of the luminance component Y, the color difference component Cr (or Y−R) and the color difference component Cb (or Y−B) is quantized with 8 bits.) Similarly, the ADC 5
1 digitizes the input analog audio signal with, for example, a sampling frequency of 48 kHz and a quantization bit number of 16 bits.

When analog video signals and digital audio signals are input to the ADC 51, the AD
C51 allows the digital audio signal to pass through.

When a digital video signal and a digital audio signal are input to the ADC 51, the ADC 51
Pass through digital video and audio signals.

The digital video signal from the ADC 51 is
It is sent to the formatter 56 via the video encoder 53. Further, the digital audio signal from the ADC 51 is sent to the formatter 5 via the audio encoder 54.
Sent to 6.

The selector 52 selects the signal from the video mixing unit when recording a reduced image for editing which will be described later.

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

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

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

The formatter 56 has a buffer memory 57.
Is used as a work area, input video signal,
Predetermined signal processing is performed on the audio signal, sub-picture signal, etc., and the recording data that matches the format (file structure) described above is output to the data processor 36.

In the above processing, a cell is set as the minimum unit of main video data (video data), and cell reproduction information (C_PBI) is created. Next, the configuration of the cells that make up the program chain, the attributes of the main video, sub-video, and audio, etc. are set (some of these attribute information uses the information obtained when encoding each data). Information management table information (VMGI_MAT or VTSI_MAT) including various information is created.

The encoded main video data, audio data and sub-video data have a fixed size (204
It is subdivided into 8 byte packs. Dummy packs are appropriately inserted into these packs. It should be noted that time stamps such as PTS (presentation time stamp) and DTS (decode time stamp) are appropriately described in packs other than the dummy pack. Sub-picture PTS
With respect to, it is possible to describe a time arbitrarily delayed from the PTS of the main video data or audio data in the same reproduction time zone.

[0117] Then, each data cell is arranged while the navigation pack 86 is arranged at the head of each VOBU 85 so that the data can be reproduced in order of the time code of each data, and the VOB 83 composed of a plurality of cells is formed. . VOBS82, which is a collection of one or more of this VOB83,
Formatted to the structure of VTS 72.

The disc drive means for reading and writing information (recording and / or reproducing) from and to the DVD disc 10 is a disc drive 32 and a temporary storage section 34.
A data processor (D-PRO unit) 36 and a system time clock (STC unit) 38.

The temporary storage section 34 buffers a fixed amount of data (data output from the encoder section 50) written to the disk 10 via the D-PRO section 36, or via the disk drive 32. It is used for buffering a fixed amount of data reproduced from the disc 10 (data input to the decoder unit 60).

For example, when the temporary storage unit 34 is composed of a 4-Mbyte semiconductor memory (DRAM), the average memory capacity is 4M.
It is possible to buffer recording or reproducing data for about 8 seconds at a recording rate of bps. When the temporary storage unit 34 is composed of a 16-Mbyte EEPROM (flash memory), it is possible to buffer record or reproduction data for about 30 seconds at an average recording rate of 4 Mbps. Further, when the temporary storage unit 34 is composed of a 100-Mbyte ultra-compact HDD (hard disk), it is possible to buffer the recorded or reproduced data for 3 minutes or more at an average recording rate of 4 Mbps. Also,
The temporary storage unit 34 can be used to temporarily store recording information until the disc 10 is replaced with a new disc, when the disc 10 is used up during recording.

Under the control of the microcomputer block (MPU unit) 30, the D-PRO unit 36 supplies the DVD recording data from the encoder unit 50 to the disc drive 32 and the DV reproduced from the disc 10.
The D reproduction signal is taken out from the drive 32, or the management information (directory record, V
(MGI_MAT, VTSI_MAT, etc.) is rewritten, or data (file or VTS) recorded on the disk 10 is deleted.

The MPU section 30 includes a CPU, a ROM in which a control program and the like are written, and a RAM which provides a work area necessary for executing the program.

The MPU unit 30 uses the RAM as a work area in accordance with the control program stored in the ROM, and detects the free space, the recording amount (the number of recording packs), the remaining amount, the warning, and the recording which will be described later. Mode change instruction,
Perform other processing.

Further, the MPU unit 30 has, for example, for each cell, an erase-prohibited range designating function, an erase-prohibit setting function, a cell dividing function, and an erase-prohibit detecting function to improve the usability for the user's system. There is.

Further, the MPU unit 30 is provided with an erasure prohibition range designating function, an erasure prohibition setting function, a program dividing function, and an erasure prohibition detecting function for each program for the recording medium described in FIG. The usability of the system has been improved.

[0126] Further the MPU unit 30 may be used in combination with up Rogura <br/> beam isolation capabilities and cell isolation capabilities.

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

The decoder section 60 is separated by the separator 62 which separates and extracts each pack from the DVD reproduction data having the pack structure described above, the memory 63 which is used at the time of executing the pack separation and other signal processing, and the separator 62. A video decoder (V-DE) 64 for decoding the contents of the video pack 88), a sub-picture decoder (SP-DE) 65 for decoding the contents of the sub-picture pack 90 separated by the separator 62, and a separator 62. The audio decoder (A-DE) 68 for decoding the contents of the audio pack 91 and the sub-picture data from the SP-DE65 are appropriately combined with the video data from the V-decoder 64, and a menu, a highlight button, Video processor that outputs subtitles and other sub-pictures (V
-PRO unit) 66.

The output of the video processor 66 is supplied to a monitor such as a television receiver via a video / digital / analog converter (V / DAC) 67 after passing through the video mixing section 200. The output from the audio decoder 68 is a digital-to-analog converter (DA
C) is supplied to the external speaker via 69. Further, the output of the audio decoder section 68 can also be taken out as a digital signal via an interface. The video mixing unit 200 includes a frame memory 2 for working.
01 is connected. A key input unit 49 and a display unit 48 for a recording / playback device are connected to the MPU unit 30.

First, the operation of the above apparatus will be briefly described.

FIG. 19 shows an operation flowchart at the time of recording.

First, when the MPU section 30 receives a recording command from the key input section 49, the management data is read via the disk drive section 36 and the area to be written is determined. next,
For the determined area, management data is set in the management area so that the data can be written, the write start address of the video data is set in the disk drive unit 36, and data recording is prepared (step A1- A
5). If there is no recording space, a warning sound or display is given. Next, the MPU unit 30 resets the time in the STC unit 38. Here, the STC unit 38 uses the timer of the system to perform recording and reproduction based on this value. Further, the MPU unit 30 makes other settings (step A).
6, A7). The flow of the video signal is as follows.

First, the AV signal inputted from the TV tuner section 44 or the external input is converted into an analog signal,
The video signal is supplied to the video encoder 53, and the audio signal is supplied to the audio encoder 54. Further, a text signal such as a character broadcast from the TV tuner 44 is input to the SP encoder 55.

Each encoder compresses each signal into packets (however, each packet is divided into 2048 bytes per pack when packetized and packetized) and input to the formatter 56. Here, each encoder determines the PTS and DTS of each packet according to the value of the STC unit 38, if necessary.

The formatter 56 has a buffer memory 57.
The packet data is temporarily stored in the DOP, then the input packet data is packed and mixed for each GOP, and an NV pack is added to the head of the GOP.
Input to the PRO unit 36.

The D-PRO unit 36 collects every 16 packs as an ECC group, attaches an ECC, and sends it to the disk drive unit 32. However, if the disc drive unit 32 is not ready to record on the disc, the disc drive unit 32 transfers the data to the temporary storage unit 34, waits until data is ready to be recorded, and starts recording when it is ready. Here, since the temporary storage unit 34 holds recorded data for several minutes or more by high-speed access, a large capacity memory is assumed.

At the end of recording, the address data of each NV pack is recorded in the data portion for fast forward and rewind in each NV pack, and the necessary information is recorded in the management area after the recording is completed. The operation ends (steps A8 to A14).

However, the MPU unit 30 can read and write the D-PRO unit 30 through the microcomputer bus in order to read and write the file management area and the like.

At the end of recording, the cell-based erasure prohibition flag (ARCHIVE Flag) used in this system is cleared to allow erasure. The erasure prohibition flag is described in C_PBI as described above. That is,
Erasing is possible at the beginning of recording. If the VMT has an erase prohibition flag, it is also cleared.

Furthermore, the data processing during reproduction is as follows. First, when the MPU unit 30 receives a playback command,
The data in the management area is read through the D-PRO unit 36 via the disk drive unit 32, and the address to be reproduced is determined. Next, the MPU unit 30 sends the drive unit 32 the address of the data to be reproduced and the read command which have been determined previously.

The drive unit 32 follows the command sent to it.
Read the sector data from the disk 10 and use D-PRO
The unit 36 corrects the error and outputs it to the decoder unit 60 in the form of pack data. In the decoder unit 60, the read pack data is received by the separator 62, packetized, video packet data (MPEG video data) is transferred to the video decoder 64, and audio packet data is transferred to the audio decoder 68 according to the purpose of the data. The sub-picture packet data is transferred to the SP decoder 65, and the NV pack is stored in the internal memory for the MPU unit 30 to process so that the MPU unit 30 can access it at any time.

At the start of transfer, each packet data sent loads the PTS contained in the header into the STC section 38 (when the PTS in the NV pack is set in the STC by the MPU section, or by the video decoder 64). The PTS of the video data is automatically set in the STC section 38), and then
Each decoder performs reproduction processing in synchronization with the value of PTS in the packet data (while comparing the values of PTS and STC), and can reproduce a moving image with audio subtitles on the TV monitor.

Here, in order to perform data management in detail,
As shown in FIG. 16, an erase prohibition flag can be provided in the cell reproduction information (CPB_I).

That is, in this system, the erasure prohibition flag is provided not in units of titles but in units of cells, so that erasure prohibition can be set in units of cells, and finer management can be performed.

The operation flow will be described with reference to FIGS. The screen transition at that time is shown in FIG. 22, and if it is necessary to divide cells, the image is shown in FIG.
3 shows. First, the erase prohibition setting process is as follows.

1) The user selects a title whose deletion is prohibited.

2) Then, a time bar corresponding to the reproduction time of the selected title (VTS or PGC) and a cursor for designating a range are displayed. At this time, by dividing each cell with a dotted line or the like, it is possible to show the user that the inside of the dotted line is the same scene (see FIG. 22).
That is, for example, with a video camera, from the start of recording,
The scene corresponds until the pause key or the recording end key is pressed. Also, in TV dramas, it means from commercial (CM) to the next CM.

3) The user designates the erase prohibition setting start position with the cursor and the marker key, and the address of the VOBU corresponding to the designated position is saved in the work memory. At this time, the leading I picture of the VOBU indicated by the cursor is displayed as a reduced image to facilitate selection. Also, the playback time at that time can be displayed. Here, the reproduction time is obtained by calculating the reproduction time information of the cell, for example.

4) The user specifies the erase prohibition setting end position with the cursor and the marker key, and the VOBU address corresponding to the specified position is saved in the work memory.

5) Confirm whether the selected range is acceptable, and if not, clear the work memory and proceed to the processing of item 4).

The above processing is performed in steps B1 to B of FIG.
Equivalent to 9.

6) It is determined whether or not the cell needs to be divided from the set start position (whether the cell start position and the set start position match). If not, item 8 ) Processing.

7) When it is necessary to divide the cell, the cell (CELL_N) to be divided is determined (determined from the start VOBU and end VOBU in C_PBI of each cell. Alternatively, the cell number is determined and stored when setting with the cursor. Use the one you have set aside.), And divide the cells.

Specifically, the end VOBU in C_PBI of CELL-N
Of the start address: C_FVOBU_SA, end address: C_LVOBU_EA, C_PBTM are stored and divided by the NV_PACK search information of the VOBU
C_FVOBU_SA, C_LVOBU_EA, C_P
Rewrite BTM.

Next, the C_PBI from the next of CELL-N is moved by one cell.

A new C_P with the following contents is stored in the moved place.
Record the BI.

C_CAT: Same as CELL-N. C_PBTM: Divided playback time. C_FVOBU_SA: Start address of divided VOBU. C_FILVU_EA: End address of the divided ILVU.
C_LVOBU_SA: C_LVOBU_SA before CELL-N change. C_LVOBU_
EA: C_LVOBU_EA before changing CELL-N.

8) The erase prohibition flag is set in the cells from the setting start cell to the setting end cell.

The processing up to this point is step B1 in FIG.
It corresponds to 0 to step B15 in FIG.

9) It is judged whether or not the CELL needs to be divided from the set end position (it is judged whether or not the CELL end position and the set end position match), and if there is no need, item 11). Move to.

10) CELL to be divided (CELL_N)
(This is the start V in the C_PBI of each CELL.
Determined from OBU and end VOBU. Alternatively, the cell number that has been determined and saved when setting with the cursor is used. ), And CELL division work is performed.

Specifically, the start address of the start VOBU in C_PBI of CELL_N: C_FVOBU_S
A, end address: C_LVOBU_EA, C_PBT
C_FVOBU_SA, C_LVOBU according to the search information of NV_PACK of the VOBU that stores and divides M
Rewrite _EA and C_PBTM.

Next, C_PBI from the next of CELL_N
Is moved by one cell.

Record a new C_PBI in the moved location.

C_CAT: Same as CELL-N. C_PBTM: Divided playback time. C_FVOBU_SA: Start address of divided VOBU. C_FILVU_EA: End address of the divided ILVU.
C_LVOBU_SA: C_LVOBU_SA before CELL-N change. C_LVOBU_
EA: C_LVOBU_EA before changing CELL-N.

11) Set the erase prohibition flag in the set end cell.

12) Judge whether the setting is completed,
If not, go to 1).

The processing up to this point is step B16 in FIG.
To B23.

[0169] However, in this embodiment, although performing processing based on the DVD- video format, application number
No .: When there is a VOBU map or a time map as used in Japanese Patent Application No. 10-040876 , the cell division processing is performed using the data from the VOBU map without using the data from the NV pack. It becomes possible to perform this processing, and this processing can be performed only in the management area.

FIG. 24 shows an operation flow when the erase prohibition setting is released in cell units, and FIG. 25 shows a display example of a TV screen.

1) The user selects a title whose deletion is prohibited.

2) Selected title (VTS or PG
A time bar corresponding to the reproduction time of C) and a cursor for designating CELL are displayed (see FIG. 25).

3) The user designates the erase prohibition setting cancel cell with the cursor and the marker key.

The processing up to this point corresponds to steps C1 to C6.

4) It is confirmed whether or not the erase prohibition of the specified CELL should be canceled, and if it is not possible, the process proceeds to item 2).

5) If the erasure prohibition can be released, the erasure prohibition flag of the designated CELL is cleared.

The processing up to this point corresponds to steps C7 to C9.

FIG. 26 shows the flow of the erasing operation at that time, and FIG. 27 shows a display example of the TV screen.

1) The user selects the title to be deleted.

2) Target title (VTS or PGC)
It is determined whether or not there is an erase-prohibited cell, and if there is not, a normal erase operation is performed. Here, each CE is used for the determination.
The ARCHTIVE_FLAG (erase prohibition flag) in C_PBI of LL is checked to make a determination.

3) The user is informed that the erasure prohibition cell exists, and the user is allowed to select whether or not to erase the portion that is not set to be erased. If "No", the process is terminated (Fig. 27).

4) Erase-prohibited CEL of the target PGCI
Leaving only L, erasing the other C_PBI, PG
Reconfigure CI.

The processing up to this point corresponds to steps D1 to D6.

5) In the file management information, new management data of the VTS file erased in cell units is created and rewritten (steps D7 to D12).

As described above, by adding the erase prohibition flag to C_PBI, it becomes possible to specify the erase prohibition setting in a finer unit.

The present invention is not limited to the above embodiment, and various modifications can be made. That is, since it is possible to attach a mark (erase prohibition flag) in units of small cells, it is also possible to use this flag as a flag for erasing on the contrary. In particular, when an advanced cell is provided by dividing a cell in a specific range, erasure can be prohibited or erased in a fine range. This can be arbitrarily set by the processing function of the playback device.

The present invention is not limited to the above embodiment, but the software showing the processing procedure shown in each operation flow is recorded in the recording medium in advance, and the player reads it and automatically An environment for realizing the function of each operation flow may be prepared. Therefore, this system also includes that the DVD disc itself has recorded therein information (software application) for causing the player to realize the above operation flow.

Another embodiment of the present invention will be further described.

FIG. 28 shows the data structure of an optical disc according to another embodiment. The lead-in area 27 includes an embossed data zone having a light-reflecting surface having an uneven shape, a mirror zone having a flat surface (mirror surface), and a rewritable data zone in which information can be rewritten. The lead-out area 26 is also configured so that information can be rewritten.

Data recording area (volume space) 2
Reference numeral 8 is composed of a volume / file management information 70 and a data area DA which can be rewritten by the user. The data area DA is included in the volume / file management information 70.
The file information of the audio / video data recorded in and the information about the entire volume are recorded.

In the data area DA, the areas DA1, DA3 for recording computer data, and the audio / video data area DA2 for recording video audio data and the like can be mixed and recorded.

The audio / video data area DA2 includes control information DA21, video object DA22, picture object DA23, and audio object DA24.

The control information DA21 can include control information necessary for performing various processes such as recording (recording or sound recording), reproduction, editing, and search. For example, a file RTR.VM of RTR_VMG which is navigation data.
An IFO (described later) can be included in the control information DA21.

The video object DA22 can include the contents (content) of the recorded video data. The picture object DA23 can include still image information such as still images and slide images. The audio object DA24 can include information on the content (content) of the recorded audio data.

A video object is composed of a video object set (VOBS). This VOBS
Have contents corresponding to one or more program chains PGC # 1 to #k each of which specifies the cell reproduction order by different methods.

In the embossed data zone of the lead-in area 27, for example, the following information is recorded beforehand.

(1) DVD-ROM, DVD-RAM
Disc types such as (DVD-RW) and DVD-R,
Information about the entire information storage medium, such as a disk size of 12 cm and 8 cm, recording density, a physical sector number indicating a recording start / recording end position, and the like.

(2) Recording power and recording pulse width, erasing power, reproducing power, recording / erasing linear velocity, and others,
Information about recording / playback / erasure characteristics.

(3) Information regarding the manufacture of individual information storage media, such as the manufacture number.

The rewritable zones of the lead-in area 27 and the lead-out area 26 include, for example, the following areas.

(4) An area for recording a unique disc name for each information storage medium.

(5) Trial recording area (for confirmation of recording erasing conditions).

(6) An area for recording management information about the defective area in the data area DA.

In the areas (4) to (6) above, the DVD
-RTR recording / reproducing machine (RTR video recorder or DVD
-Recording by a personal computer with a RAM drive is possible.

FIG. 29 is a diagram for explaining the data structure of the VOB of FIG. Each cell (for example, cell #m) forming a video object is composed of one or more video object units (VOBU). Each VOBU is configured as an aggregate (pack row) of video packs, sub-picture packs, audio packs, dummy packs, and the like. Each of these packs has a predetermined size of 2048 bytes and is a minimum unit for performing data transfer processing.

The reproduction time of the VOBU corresponds to the reproduction time of the video data composed of one or more video groups (GOP) included in the VOBU, and the reproduction time is in the range of 0.4 seconds to 1.2 seconds. It is within. 1 GOP is 0.5 second in the MPEG standard, and is image data compressed so as to reproduce about 15 frame images during that period.

If the VOBU contains video data,
A GOP including a video pack, a sub-picture pack, and an audio pack is arranged to form a video stream.

The packs forming the VOBU have the same data structure except for the dummy pack. Taking an audio pack as an example, a pack header is placed at the beginning, a packet header is placed next, a substream ID is placed next, and audio data is placed last.

In this pack structure, the packet header describes the information of the presentation time stamp PTS indicating the start time of the first frame in the packet. On the other hand, the video pack has a data structure obtained by removing the substream ID from the above audio pack. However, regarding the first video pack in VOBU,
A predetermined system header is provided between the pack header and the packet header.

DVD recording a program having such a video object DA22 on a disc
-In the RTR recording / reproducing machine, there is a demand to edit the recorded contents after recording the program. To answer this, a dummy pack can be appropriately inserted into each VOBU. This dummy pack can be used when recording data for editing later.

FIG. 30 shows the data structure of the dummy pack.

One dummy pack 89 includes a pack header 891 and a packet header 8 having a predetermined stream ID.
92 and padding data 983 filled with a predetermined code (invalid data). The packet header 892 and padding data 893 form a padding packet 890. The content of the padding data 893 of the unused dummy pack has no special meaning. The dummy pack is appropriately used when the recorded contents are edited and when the after-recording is performed by using the dummy pack as an audio pack (addition after the fact).

FIG. 31 shows an example of the directory structure of the optical disc in the above embodiment.

RTR. The IFO file (real-time information file) is data as management information, and is navigation data that provides a program set, programs, entry points, playlists, and the like. RTR_MOV. VRO files (real-time recording movie video files) are
It is a file in which stream data classified as a movie video object is recorded. RTR_ST
O. VRO file (real-time recording still picture video file) and RTR_STA. VR
The O file (real-time recording still picture audio file) is defined as follows. Stream data classified as a still picture VOB (video object) is recorded in these two files, and RTR_
STO. The VRO file is used to record an original VOB consisting of a video portion including an arbitrary sub-picture unit and an arbitrary audio portion. RTR_STA.
VRO files are
Used to record an additional audio portion that provides an audio stream. Then, RTR_STA. V
The audio recorded in the RO file is RTR_ST
O. Used in combination with some of the videos recorded in the VRO file. And still picture VOB
As long as RTR_STO. As long as the VRO file exists and the additional audio part exists, RTR_ST
A. VRO file exists.

As another directory, an audio manager information file (AUDI
O_TS. IFO file ... Overall management information of audio data), audio manager information backup file (AUDIO_TS.BUP file), audio title set information file (ATS_01.IFO file ... management information of audio title set), audio title set audio object file ( ATS_0.1.
AOB file ... audio data) may exist.

FIG. 32 shows the structure of the management information (control information) hierarchically.

The structure of the video manager (VMG) is shown in the figure. In particular, the original program chain information (O
RG_PGCI) and the user-defined program chain information table (UD_PGCIT) are shown in detail hierarchically.

The VMG is the RTR (real time recording) video manager information (RTR_VMGI).
And the movie AV file information table (M_AVFI
T), still picture AV file information table (S_AVFIT), original PGC information (ORG_
PGCI), user-defined PGC information table (UD_P
GCIT), Text Data Manager (TXTDT)
_MG) and a manufacturer information table (MNFIT).

(RTR_VMGI) is VMGI_MA
It is composed of T (video manager information management table) and PL_SRPT (playlist search pointer table) (FIG. 33).

In VMGI_MAT, the identification signal of this VMG, the end address of the entire VMG, the end address of this VMGI, the version number, the time zone on the disc, the still time of the still picture, the character set code of the basic text, etc. are described. Has been done.

[0221] PL_SRPT describes information for searching and accessing a playlist on the disc. The play list is formed by a user-defined PGC. Therefore, each playlist search pointer has a PGC number corresponding to each playlist. That is, the PL_SRPT describes the playlist search pointer information (PL_SRPTI) and the playlist search pointer (PL_SRP # n).

Playlist search pointer (PL_SR
P # n) includes a playlist type (identification of movie playlist, still picture playlist, or hybrid playlist), PGC number, time when the playlist is increased, basic text information, the playlist. Text search pointers, thumbnail pointer information, etc. are described.

The movie AV file information table (M_AVFIT) in FIG. 32 describes movie AV file information table information (M_AVFITI), movie VOB stream information #n (M_VOB_STI # n), and movie AV file information (MV_AVFI). (Fig. 34).

In M_AVFITI of FIG. 34, the number of movie AV file information, the number of movie VOB stream information, and the end address are described. Also, M_V
OB_STI # n describes a video attribute, the number of audio streams, the number of sub-picture streams, the attribute of each audio stream, the attribute of the sub-picture stream, the color palette of the sub-picture, and the like.

Further, M_AVFI includes movie AV file general information (M_AVFI_GI) and movie VO.
The B information search pointer (M_VOB_SRP # n) and the movie VOB information #n (M_VOB_STI # n) are described.

M_AVFI_GI contains M_VOB_S
The number is described in RP, and the start address of the corresponding movie VOB information is described in M_VOB_SRP # n.

Movie VOB information #n (M_VOB_S
TI # n) includes movie VOB general information (M_VOB
I_GI), seamless information (SMLI), audio gap information (AGAPI), time map information (TM)
API) is included.

Movie VOB general information (M_VOBI_
GI) includes the video type, the VOB head time when the VOB was recorded, the VOB head time (second) when the VOB was recorded, the movie VOB stream information number, and the start PTM (presentation) of this VOB. Time) and the end PTM (presentation time) of this VOB are described.

As the video type, it is indicated whether this VOB is a normal type or a temporary erase type. It also indicates whether the audio stream # 0 is the original one, or the one partially or wholly modified. In addition, whether the audio stream # 1 is the original one, the modified one, the dummy, the untouched one, or the first dummy, which is used in some way and modified Is added. It also indicates whether or not it has an audio gap.

The seamless information (SMLI) is
The system clock reference (SCR) for the first pack needed to seamlessly provide B from the previous VOB is described. Also, the SCR of the last pack of the previous VOB is described.

Audio gap information (AGAPI)
Describes the audio gap information of each audio stream in this VOB, and gives the audio stop time at the discontinuity.

The time map information (TMAPI) is prepared for realizing special reproduction and time search, and includes time map general information (TMAP_GI), time entry information (TM_ENT # n), VOBU entry information (VOBU_ENT). #N) etc. are described.

Each VOBU entry information (VOBU_E
NT # n) includes size and playback time information of each VOBU. The size of VOBU is measured by the number of sectors, and the reproduction time is measured by the number of video fields.
Each time entry information is VOBU entry information to be reproduced every 10 seconds from the start of VOB.
The number of VOBU entries from the beginning of the VOB, the number of frames in the VOBU with a break of just 10 s, and the address information from the beginning of the VOB are indicated.

Therefore, various VOBUs can be handled by using this time entry information. The device of the present invention can also utilize or correct this time entry information.

The still picture AV file information table (S_AVFIT) includes still picture AV file information table information (S_AVFITI) and still picture VOB stream information (S_VOB_STI #).
n), still picture AV file information (S_AVF
I), still picture added audio stream information (S_AA_STI # n), and still picture added audio file information (S_AAFI) are described (FIG. 35).

The still picture AV file information table information (S_AVFITI) has an end of a table of the number of AV file information, the number of additional audio file information, the number of still picture VOB stream information, and the number of still picture additional audio stream information. The address is described.

The still picture VOB stream information (S_VOB_STI # n) describes video attributes, original audio audio attributes, sub-picture attributes, and sub-picture color palette.

Still picture AV file information (S_
AVFI) is still picture AV file general information (S_AVFI_GI), still picture VOB group information search pointer (S_VOGI_SRP #).
n), still picture VOB group information (S_VO
GI) is described. In S_AVFI_GI, the number of still picture VOB group information is described.
In OGI_SRP # n, the start address of still picture VOB group information is described.

Still picture VOB group information (S
_VOGI # n) includes still picture VOB group general information (S_VOG_GI) and still picture V.
The OB entry #n (S_VOG_ENT # n) is described.

In S_VOG_GI, the number of still picture VOBs, the VOB stream information number, the time when the first VOB of this VOB group was recorded, and this V
The time when the last VOB of the OB group was recorded,
The start address of the VOB group is described. Also S_
The VOG_ENT # n includes information necessary for accessing or searching the VOB of the group. S_V
There are multiple types of OG_ENT # n. The type 1 describes type information indicating whether this VOB is in a normal state or temporarily erased, and size information of the video portion. In Type 2, in addition to the above, the size of the original audio portion and the reproduction time of the audio portion are described. In Type 3, the type information indicating whether this VOB is in a normal state or temporarily erased, the size information of the video portion, the number of the additional audio group, and the entry number of this additional audio group are described. To be done. In the type 4, information including the information of the types 3 and 4 described above is described.

In the still picture added audio file information (S_AAFI) of FIG. 35, general information (S_AAFI_GI) of the file information and search pointer #n (S_AAGI_) of the added audio group information are included.
GSRP # n), additional audio group information #n (S
_AAGI # n) is described.

The number of search pointers is described in S_AAFI_GI, and the address of the corresponding information is described in S_AAGI_GSRP # n. The S_AAGI # n describes the general information and the entry information. General information includes the number of entries, the number of additional audio stream information,
It has a start address of the stream information. The entry information includes the type of additional audio, the size of the audio stream sector, and the playback time of the additional audio stream.

Next, the user-defined program chain information table and the original program chain information table which are particularly related to the present invention will be described.

The user-defined program chain information table (UD_PGCIT) includes user-defined PGC information table information (UD_PGCITI) and user-defined PGC.
A search pointer #n (UD_PGC_SRP # n) and user-defined PGC information #n (UD_PGCI # n) are described.

UD_PGC_TI contains UD_PGC_
Number of SRP (UD_PGC search pointer), UD_P
The end address of GCIT (UD_PGC information table) is described. Also, for UD_PGC_SRP, U
The start address of D_PGCI is described.

Program chain information (PGCI) exists in each of the user-defined program chain information table and the original program chain information table, but since their data formats are the same, they will be described in common.

The program chain information (PGCI) includes program chain general information (PGCI_GI),
Program information (PGI # n), cell information search pointer (CI_SRP # n), and cell information (CI # n) are described.

As shown in FIG. 36, the program chain general information (PGCI_GI) contains the number of programs (P
G_Ns), the number of cell search pointers (CL_SRP_
Ns) is described (FIG. 36). The program information (PGCI # 1) contains the program type (PG_T
Y), the number of cells (C_Ns) in this program, basic text information (PRM_TXTI), IT text search pointer number (IT_TEXT_SRPN), and thumbnail pointer information (THM_PTRI) are described.

The cell information #n (CI # 1) includes movie cell information and still picture cell information, which are shown in FIG.

As shown in FIG. 32, CI # 1 includes cell general information (C_GI) and cell entry information (C_EP).
I # n) is described. As cell general information (C_GI), cell type (C_TY), movie VOB information search pointer number (M_VOBI_SRPN), number of cell entry point information (C_EPI_Ns), cell playback start time (C_V_S_PTM), cell playback end time (C_V_E_PTM). Is described.

Also, cell entry point information (C_E
PI) is the type of entry point (EP_
TY), the reproduction time of the entry point, and the basic text information (PRM_TXTI) of this entry point. EP_TY is 0 when the basic text information (PRM_TXTI) exists, and 1 otherwise.

The optical disc having the management information as described above can be recorded / reproduced by the recording / reproducing apparatus shown in FIG. Since the basic operation of the apparatus of FIG. 1 has been described above, the characteristic operation of the present invention will be described.

That is, in the present invention, the erase prohibition range is shown in FIG.
It can be attached in program units as shown in.
This enables bold data management.

The operation flow will be described with reference to FIGS. 37 and 38. The screen transition at that time is shown in FIG. 39. If it is necessary to divide the program, its image is shown in FIG. First, the erase prohibition setting process is as follows.

1) The user selects a title whose deletion is prohibited.

2) Then, a time bar corresponding to the reproduction time of the selected title (VTS or PGC) and a cursor for designating a range are displayed. At this time, by dividing each cell with a dotted line or the like, it is possible to show the user that the inside of the dotted line is the same scene (see FIG. 39). That is, for example, in a video camera, from the start of recording to the pressing of the pause key or the recording end key corresponds to this scene. In TV dramas, commercials (C
From M) to the next CM.

3) The user designates the erase prohibition setting start position with the cursor and the marker key, and the address of the VOBU corresponding to the designated position is saved in the work memory. At this time, the leading I picture of the VOBU indicated by the cursor is displayed as a reduced image to facilitate selection. Also, the playback time at that time can be displayed. Here, the reproduction time is obtained by using the reproduction start time and reproduction end time information of the cell, for example.

4) The user specifies the erase prohibition setting end position with the cursor and the marker key, and the address of the VOBU corresponding to the specified position is saved in the work memory.

5) It is confirmed whether the selected range is acceptable, and if it is not possible, the work memory is cleared and the process proceeds to item 4).

The above processing is performed in steps D1 to D in FIG.
Equivalent to 6.

6) It is judged from the set start position whether the program needs to be divided (whether the program start position and the erase prohibition set start position match), and if not necessary, Move on to processing of item 8).

7) When it is necessary to divide the program, the start cell number of the erase-prohibited range and the end cell number of the erase-prohibited range are determined, and then it is determined whether the start cell needs to be divided. If it is necessary to divide the program, divide the program (steps D7, D8, D
9). In this division processing, there are a method of dividing in units of cells that are close to the dividing unit and a method of dividing the cells themselves in units of VOBU, but either method may be adopted.

Then, the number of cells of the divided program (PG) is determined from the start cell number (D10). If the cell is divided here, the cell information (C
VO to the cell entry point (C_EPI) in I)
Determined in BU units. Alternatively, the cell entry point that was determined and saved when setting with the cursor is used. As a result, the cell entry point information increases, so the cell information and cell entry points in FIG. 32 are shifted by one cell, new cell information and cell entry points are created, and a cell search pointer is added to the management information. To place. Here, C_TY in the new C_GI is the same as the original C_CY.

In addition, new program chain information (P
GCI) will be created based on the above cell information table (D11). This PGCI is the PGCI for the new program PG1 'in FIG.

Next, it is determined whether division at the ending cell number is necessary (step D12). The example of FIG. 40 illustrates a case where cell division is necessary even in the end cell. In this case, the number of cells from the latter half cell divided at the previous erase prohibition start position to the first half cell of the cell divided at the erase prohibition end position is counted, and the cell information (CI) of these cells is created. And based on this, a new PG
Create a CI. This PGCI is the PGCI for the new program PG2 of FIG. 40 (D13, D1
4).

Further, the number of cells from the latter half of the cells divided at the erase prohibition end position to the last cell of the program PG1 (before division) is counted and cell information (CI) of these cells is created. And based on this, a new P
Create GCI. This PGCI is the PGCI for the new program PG3 of FIG. 40 (D15, D1
6).

8) The erase prohibition flag (protect flag) is set to the program type (P_TY) from the setting start position to the setting end (D17).

9) It is judged whether or not the setting is completed, and if it is not completed, the routine goes to step D3.

In the above description, it is explained that the erase prohibition flag is added to the program type, but the invention is not limited to this, and when an area where the erase prohibition flag can be added to the information of the cell belonging to the program is secured, An erasure prohibition flag may be further added to this area.

Further, the erase prohibition flag may be doubly written in both the management information for managing the program and the cell, or the case where the program is managed independently and the case where the cell is managed are used separately. You may be allowed to. That is, it may be possible to selectively use the two modes, that is, the mode in which the erase prohibition flag can be added in the program unit as described above and the mode in which the erase prohibition flag can be added in the cell unit.

FIG. 41 shows an operation flow for canceling the erase prohibition setting set for each program as described above. FIG. 41 shows a display example of the TV screen.

1) The user selects a title whose deletion is prohibited.

2) Selected title (VTS or PG
A time bar corresponding to the reproduction time of C) and a cursor for designating a program are displayed (see FIG. 41). In this case, the portion of the program for which erasure prohibition is set is displayed with a different color of the time bar (for example, a shaded portion).

3) When the cursor is moved to the erasure prohibition start position or end position, the reproduced image of the I picture at that position can be viewed in a reduced state.

4) The user designates the erase prohibition setting release program by the cursor and the marker key. The processing so far corresponds to steps E1 to E6.

5) It is confirmed whether or not the deletion prohibition of the designated program can be canceled, and if it is not possible, the process proceeds to item 2).

6) If the erasure prohibition can be released, the erasure prohibition flag in PGCI of the designated program is cleared. The processing up to this point is steps E7 to E9.
Equivalent to.

After this, new program chain information is reconstructed. For example, in order to become the original program PG described in FIG. 40, the original program PG1
The management information of will be rebuilt.

FIG. 43 further shows the operation flow of the erasing operation at that time, and FIG. 44 shows a display example of the TV screen.

1) The user selects the program or title to be deleted.

2) It is judged whether or not there is an erase prohibition flag in the PGI of the program, and if there is not, an ordinary erase operation is performed. Here, the determination is made by checking the PGI erase prohibition flag. For normal erase, PGI
The cell is determined from the cell information that belongs to, and the VOB information to which the cell belongs is determined based on the determined cell information. That is, V
The OB and the playback time (S_PTM (start time), E_PTM (end time)) in the OB are determined, and the VOB information and the video object unit (V
OBU) is determined. Then, the corresponding VOBU is deleted from the VOB file, and the corresponding VOBU information, cell information,
Erase PGI from VMG file (step F
4). This erasing method may use AVFI for other management information.

3) The user is informed that the erasure prohibition program exists, and the user is allowed to select whether or not to erase the portion not set for erasure. If "No", the process is terminated (Fig. 44).

4) Original PGI of target program
Among them, only the erase-prohibited program is left, the other programs are erased, and only the necessary PGI is reconfigured.

The processing up to this point corresponds to steps F1 to F6.

5) In the file management information, new management data of the VMG file erased in program units is created and rewritten (steps F7 to F8).

The recording medium, recording method, recording device and reproducing device according to the present invention described above are summarized as follows.

The feature of the present invention resides in the reproduction management information area in the management area of the recording medium. In other words, in this area, an area in which the erase prohibition flag is provided in program units and / or cell units is secured.

The recording medium of the present invention is composed of a management area and a data area, and data is recorded in a plurality of sequences in the data area, and each program (sequence) is composed of a plurality of cells. One cell is composed of a data unit, and the data unit packs and records video and audio to be reproduced within a predetermined time into a plurality of packs, and manages a program (sequence) in the management area. It is a recordable information recording medium in which a management table, a management table for managing cells, and a management table for managing data units are present independently of each other or included (dependently) on each other.

Then, the information recording medium secures an area in which the erasure prohibition information is recorded in the program management table or the cell management table. In addition, erasure prohibition information may be secured for both parties.

The present invention also provides a cell erasure prohibition setting process or process for adding erasure prohibition information to the program or the cell management table or both in the method or apparatus for recording data on the recording medium as described above. It is characterized by having a section.

Further, when erasing prohibition is designated in the cell unit, there is provided a means for judging whether or not the designated cell is at the break of the program. When there is no break, the program division detection process ( Means) and cell division processing (means) for dividing the program into cell units when program division is necessary based on the result of the cell division detection processing.

In this case, of course, when it is necessary to divide the cell as well, cell division processing may be used together.

Furthermore, the above data unit (VOBU)
When erasure prohibition is specified in units, cell division detection processing (means) for determining whether or not the designated data unit is at a cell break, and cell division detection processing based on the result of the cell division detection processing It is characterized by having a cell dividing process (means) for dividing a cell when necessary.

Further, in the present invention, when setting the erasure prohibited range, the time bar corresponding to the reproduction time of the sequence is displayed, and the cursor is displayed on the time bar to specify the erasure prohibited range. It is characterized by having designation processing (means) and video display processing (means) for displaying the video of the data unit closest to the reproduction time corresponding to the position of the cursor, and making it easy for the user to designate erasure prohibition. .

Furthermore, according to the present invention, a time bar corresponding to the reproduction time of the sequence is displayed, and an erase-prohibited range designation process (means) for designating an erase-prohibited range by displaying a cursor on the time bar, A video display process (means) for displaying a reproduction time corresponding to the position of the cursor is provided to facilitate the user's designation of erasure prohibition.

Further, according to the present invention, when erasing is designated in the sequence unit in the information recording / reproducing process (means) for recording / reproducing on the recording medium, there is the erasure prohibition program (or cell) in the designated sequence. An erase-prohibited range detection process (means) for determining whether or not, and a sequence for reconfiguring the sequence only with the erase-prohibited program (or cell) when an erase-prohibited program (or cell) exists based on the detection result. Reconstruction process (means)
It is characterized by having and.

Further, the present invention has a program (or cell) erasing section for erasing only the erase program (or cell).

Further, according to the present invention, when erasing is designated in program (sequence) units, there is an erasing prohibition detecting section for deciding whether the designated program is an erasing prohibition program and an erasure prohibition flag. It has a display part to inform. Furthermore, it also has a designating unit that designates erase prohibition setting / cancellation in cell units. Further, it has an erase prohibition unit for prohibiting the erase of the program (or cell) to which the erase prohibition information is added. Further, it has an erase prohibition canceling unit for canceling the erase prohibition of the program (or cell) to which the erase prohibition information is added. Furthermore, it has a combination of the above functions or a single function.

The scope of the present invention is the original program chain information (OPGC) constructed in the order of data recording.
I) only, the erasure prohibition flag may be set, and the erasure prohibition flag is set in the user-defined program chain information (UD_PGCI) formed by the user's own selection from the original program chain. Good.

When the program is divided, it may be divided in units of cells or the cells themselves may be divided. When dividing in cell units, the VO at the beginning of the cell
It is preferable that the erase-prohibited range can be set by referring to the reduced screen included in the BU. Further, as a unit of the program, various units such as a unit between commercials, a unit of recording date and time, a unit of continuous recording period, or a unit defined by a user can be considered, but which unit is adopted is arbitrary.

Further, as recording information of the recording / reproducing system, a movie AV file and a still picture AV file exist, but it goes without saying that the present invention can be applied to editing of any file.

FIG. 45 and FIG. 46 are still another embodiment, and show an operation flow chart in the case where it is determined in advance whether or not cell division is necessary when the erase-prohibited range is set. .

From step H1 to step H11,
This is the same as steps B1 to B11 shown in FIG. If the cell needs to be divided in step H10, the cell is determined (step PH1).
1).

Next, the VOBU entry information in the real time video manager is referenced. This is because in this disk system, the file information is managed by M_VOBI # n as shown in FIG.
This is because there is time map information in #n and entry information of each VOBU (video object unit) is described in this time map information.

VOBU entry information (VOBU_EN
T # n) includes the size and playback time information of each VOBU. The size of VOBU is measured by the number of sectors,
Playback time is measured in number of video fields. Each time entry information is VOBU entry information that should be reproduced every 10 seconds from the start of the VOB. The number of VOBU entries from the beginning of the VOBU, the number of frames with exactly 10 seconds in the VOBU, and the beginning of the VOB. Address information of is shown.

Therefore, various VOBUs can be handled by using this time entry information. The device of the present invention can also utilize or correct this time entry information.

Therefore, the cell information can be determined by referring to the VOBU entry information which is the division symmetry and determining the cell division point in VOBU units. This cell information (CI) is information for the divided first half new cell. Further, since the number of cells has increased by one, in order to secure the cell information writing area, the cell information (CI # n) so far is moved by one to secure the writing location of the new cell information (H12, H13).

Next, the cell information (CI) for the latter half cell obtained by dividing the original cell (before division) is determined. Next, it is determined whether or not the cell at the end of the erase-prohibited range needs to be divided (H15). If there is no need for division, the process moves to step H20 and it is determined whether or not division of the program is necessary.

If division is necessary, the process moves to step (H16) to decide the cell to be divided. Then, the cell division point is determined from the VOBU entry information of the cell to be divided.
When the division point is determined by this, new cell information (CI) for a new cell within the erase-prohibited range is determined (step H
17). Then, another cell information (CI # n) is moved by one to create a writing location of new cell information (step H18).

Next, the cell information (CI) of the new cell in the latter half of the divided cell is determined.

Next, it is determined whether or not the program needs to be divided. Cell is a single program (PG)
Determine whether you belong to If there is no need to divide the program, the erase prohibition flag is set to the program type (PG_TY) of the program within the protected range (step H28). If the program needs to be divided, the number of cells of the program to be divided is determined from the start cell number (step H24). Next, new program information (PGI) (FIG. 36) is added, and the cell number C_Ns from the start cell to the end cell is updated (H27).
Then, the erasure prohibition flag is set to the program type (PG_TY) of the program within the protect range (step H28). It is judged whether or not the erasure prohibited range setting is completed (step H29), and if not completed, the process returns to step H2.

[0312]

As described above, according to the present invention,
The erasure prohibition setting can be specified in a bold and fine unit, and thus an effect that bold and fine data management can be achieved can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram illustrating a structure of a recordable / reproducible optical disc.

FIG. 3 is a diagram illustrating a hierarchical structure of information recorded on an optical disc.

FIG. 4 is a diagram illustrating a logical structure of information recorded on an optical disc.

FIG. 5 is a diagram illustrating a directory structure of information (data file) recorded on an optical disc.

FIG. 6 is a diagram illustrating a hierarchical structure of a video object set.

FIG. 7 is a diagram for explaining the contents of the lowermost pack of the hierarchical structure of FIG.

FIG. 8 is a diagram illustrating the contents of a navigation pack.

FIG. 9 is a diagram illustrating the contents of a PCI packet.

FIG. 10 is a diagram illustrating the content of reproduction control information PCI.

FIG. 11 is a diagram illustrating the content of reproduction control information general information PCI_GI.

FIG. 12 is a diagram illustrating the content of video title set information VTSI.

FIG. 13 is a diagram illustrating the contents of a video title set program chain information table.

FIG. 14 is a diagram illustrating the content of video title set program chain information.

FIG. 15 is a diagram illustrating the contents of a cell reproduction information table.

FIG. 16 is a diagram illustrating the content of cell reproduction information.

FIG. 17 is a diagram illustrating the contents of a cell category.

FIG. 18 is a view for explaining the contents of general program chain information.

FIG. 19 is a diagram showing an example of a recording operation flow of the apparatus according to the present invention.

FIG. 20 is a diagram showing an example of an erase prohibition setting operation flow according to the present invention.

FIG. 21 is a view showing a sequel to FIG. 20;

FIG. 22 is a diagram showing an example of an image on the screen when the erasure prohibited range is set.

FIG. 23 is a diagram illustrating the principle of cell division.

FIG. 24 is a diagram showing an example of a title deletion processing flow of the device according to the present invention.

FIG. 25 is a diagram showing an example of a screen display during title deletion processing of the device according to the present invention.

FIG. 26 is a diagram showing an example of a deletion prohibition cancellation processing flow of the device according to the present invention.

FIG. 27 is a diagram showing an example of a screen display when erasing prohibition of the device according to the present invention is released.

FIG. 28 is an explanatory diagram showing a data structure of a recording medium according to another embodiment of the invention.

FIG. 29 is an explanatory diagram showing a data structure of a recording medium according to another embodiment of the invention.

FIG. 30 is a view showing an example of the structure of a dummy pack.

FIG. 31 is an explanatory diagram showing a directory structure of a recording medium according to another embodiment of the invention.

FIG. 32 is an explanatory diagram showing a hierarchical structure of a video manager of the recording medium.

FIG. 33 is an explanatory diagram showing a hierarchical structure of video manager information of a recording medium.

FIG. 34 is an explanatory diagram showing a hierarchical structure of a movie AV file information table of the recording medium.

FIG. 35 is an explanatory diagram showing a hierarchical structure of a still pitcher AV file information table of the recording medium.

FIG. 36 is an explanatory diagram showing a hierarchical structure of program chain information of a recording medium.

FIG. 37 is a flowchart showing the operation of the reproducing apparatus when setting the erasure prohibited range of the program on the recording medium.

FIG. 38 is a view showing a sequel to FIG. 37;

FIG. 39 is a diagram showing an example of an image on the screen when the erasure prohibited range is set.

FIG. 40 is a diagram for explaining the principle of program division.

FIG. 41 is a diagram showing an example of a program erase processing flow of the device according to the present invention.

FIG. 42 is a diagram showing an example of a screen display during a program erase process of the device according to the present invention.

FIG. 43 is a diagram showing an example of program erase prohibition cancellation processing flow of the device according to the present invention.

FIG. 44 is a diagram showing an example of a screen display when releasing the program erase prohibition of the device according to the present invention.

FIG. 45 is a diagram showing an example of an erase prohibition setting operation flow according to the present invention.

FIG. 46 is a view showing a sequel to FIG. 45;

[Explanation of symbols]

10 ... Optical disk, 30 ... MPU section, 32 ... Disk drive section, 34 ... Temporary storage section, 36 ... D-PRO section, 3
8 ... STC section, 48 ... Key input section, 49 ... Display section, 50
... Encoder section, 51 ... Analog-to-digital converter, 52
... selector, 53 ... video encoder, 54 ... audio encoder, 55 ... sub-picture encoder, 56 ... formatter, 57 ... buffer memory, 60 ... decoder section, 6
2 ... Separator, 63 ... Memory, 64 ... Video decoder, 65 ... Sub-picture decoder, 66 ... Video processor section, 68 ... Audio decoder, 69 ... Digital-analog converter, 200 ... Video mixing section, 201 ... Frame memory.

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI H04N 5/445 H04N 5/445 Z 5/85 5/85 Z 5/91 5/91 N 5/92 5/92 H (72 ) Inventor Hideki Mimura 70 Yanagi-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Stock company Toshiba Yanagimachi factory (72) Inventor Kazuhiko Hirara 3-3-9 Shimbashi, Minato-ku, Tokyo Toshiba Abu E. Ltd. ( 72) Inventor Yuji Ito 70 Yanagi-cho, Sachi-ku, Kawasaki-shi, Kanagawa Stock company Toshiba Yanagi-cho factory (56) References JP-A-10-106167 (JP, A) JP-A-10-50034 (JP, A) Kaihei 10-40667 (JP, A) JP 10-162550 (JP, A) JP 9-261584 (JP, A) JP 2001-52467 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) G11B 20/10-20/16 G11B 27/00-27/34 H04N 5/76 H04N 5/80-5/95

Claims (4)

(57) [Claims] 1. A recording medium capable of recording video information, Contains the video informationVideo object (VOB)
WhenBefore recorded in the video object (VOB)
Manage video informationVideo manager (VMG)When
Can be recorded, The video object (VOB) isMultiple video
The video unit including the object unit (VOBU)
The object unit (VOBU) isIncluding the video information
Mu pack (V_PCK) and pack containing audio information (A
_PCK) includedSee At the beginning of the video object unit (VOBU)
In the located video pack (V_PCK), the pack
System header between header and packet headerThen Including a plurality of video object units (VOBU)
A cell (CELL) that determines the range to be removed is defined, To the video manager (VMG) IsThe cell (C
ELL) cell information (CI)Based on multiple cells
(CELL)ConnectWasProgram (PG)Consists of
RuOriginal program chain information (ORG_PGC
I)Included,Original program chain information
(ORG_PGCI), In the program (PG)
ConcernContains program information (PGI), The program information (PGI) includes the program type
Information (PG_TY) indicating that the information (PG_TY) is included.
TY) is the corresponding program (PG)Set erase
RuIncluding information,Set erasure for part of the program (PG)
Sometimes one of the ends of the setting range is the cell (CELL)
If you decide to split this cell as a result of being
If the cell to be erased (CELL) is determined,
The head is the beginning of the video object unit (VOBU)
The cell is divided so that
Information (CI) is also stored in the above video manager (VMG)
Was added Information recording medium characterized by
body. 2. An information recording device for recording video information on an information recording medium.
In the recording method, Contains the video informationVideo object (VOB)
WhenBefore recorded in the video object (VOB)
Manage video informationVideo manager (VMG)When
Can be recorded, The video object (VOB) isMultiple video
The video unit including the object unit (VOBU)
The object unit (VOBU) isIncluding the video information
Mu pack (V_PCK) and pack containing audio information (A
_PCK) includedSee At the beginning of the video object unit (VOBU)
In the located video pack (V_PCK), the pack
System header between header and packet headerThen Including a plurality of video object units (VOBU)
A cell (CELL) that determines the range to be removed is defined, To the video manager (VMG) IsThe cell (C
ELL) cell information (CI)Based on multiple cells
(CELL)ConnectWasProgram (PG)Consists of
RuOriginal program chain information (ORG_PGC
I)Included, Original program chain information (ORG_PG
CI), Regarding the program (PG)Program
System information (PGI) is included, The program information (PGI) includes the program type
Information (PG_TY) indicating that the information (PG_TY) is included.
TY) is the corresponding program (PG)Set erasure
InformationIncluding,Set erasure for part of the program (PG)
Sometimes one of the ends of the setting range is the cell (CELL)
If you decide to split this cell as a result of being
If the cell to be erased (CELL) is determined,
The head is the beginning of the video object unit (VOBU)
The cell is divided so that
Information (CI) is also stored in the above video manager (VMG)
Added An information recording method characterized by the above. 3. Information for reproducing video information from an information recording medium
In the playback method, Contains the video informationVideo object (VOB)
WhenBefore recorded in the video object (VOB)
Manage video informationVideo manager (VMG)When
Can be recorded, The video object (VOB) isMultiple video
The video unit including the object unit (VOBU)
The object unit (VOBU) isIncluding the video information
Mu pack (V_PCK) and pack containing audio information (A
_PCK) includedSee At the beginning of the video object unit (VOBU)
In the located video pack (V_PCK), the pack
System header between header and packet headerThen Including a plurality of video object units (VOBU)
A cell (CELL) that determines the range to be removed is defined, To the video manager (VMG) IsThe cell (C
ELL) cell information (CI)Based on multiple cells
(CELL)ConnectWasProgram (PG)Consists of
RuOriginal program chain information (ORG_PGC
I)Included, Original program chain information (ORG_PG
CI), Regarding the program (PG)Program
System information (PGI) is included, The program information (PGI) includes the program type
Information (PG_TY) indicating that the information (PG_TY) is included.
TY) is the corresponding program (PG)Set erasure
InformationIncluding,Set erasure for part of the program (PG)
Sometimes one of the ends of the setting range is the cell (CELL)
If you decide to split this cell as a result of being
If the cell to be erased (CELL) is determined,
The head is the beginning of the video object unit (VOBU)
The cell is divided so that
Information (CI) is also stored in the above video manager (VMG)
To be added, The video information based on the information in the management information file
An information reproducing method, characterized in that the information is reproduced. 4. Information for reproducing video information from an information recording medium
In the playback device, Contains the video informationVideo object (VOB)
WhenBefore recorded in the video object (VOB)
Manage video informationVideo manager (VMG)When
Can be recorded, The video object (VOB) isMultiple video
The video unit including the object unit (VOBU)
The object unit (VOBU) isIncluding the video information
Mu pack (V_PCK) and pack containing audio information (A
_PCK) includedSee At the beginning of the video object unit (VOBU)
In the located video pack (V_PCK), the pack
System header between header and packet headerThen Including a plurality of video object units (VOBU)
A cell (CELL) that determines the range to be removed is defined, To the video manager (VMG) IsThe cell (C
ELL) cell information (CI)Based on multiple cells
(CELL)ConnectWasProgram (PG)Consists of
RuOriginal program chain information (ORG_PGC
I)Included, Original program chain information (ORG_PG
CI), Regarding the program (PG)Program
System information (PGI) is included, The program information (PGI) includes the program type
Information (PG_TY) indicating that the information (PG_TY) is included.
TY) is the corresponding program (PG)Set erasure
InformationIncluding,Set erasure for part of the program (PG)
Sometimes one of the ends of the setting range is the cell (CELL)
If you decide to split this cell as a result of being
If the cell to be erased (CELL) is determined,
The head is the beginning of the video object unit (VOBU)
The cell is divided so that
Information (CI) is also stored in the above video manager (VMG)
To be added, The video information based on the information in the management information file
An information reproducing device characterized by having means for reproducing
Place