JPH11312379A - Optical disk capable of recording information about recorded video and its recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk which can record a program (cinema, drama and the like) recorded from TV and the like and information about video recorded by a user by a cam coder and the like relating to this video. SOLUTION: In an information recording medium which can record video information, a control region 70 and a data region 76 are provided, control information 78 is stored in the data region 78, a video object set 80 to be reproduced is stored succeeding to this control information 78. A region in which keyword information 109 is recorded is provided for the control information 78, wherein key words such as a recording start time, a recording finish time, a recording channel, and the like are record. Reserving a video recording and retrieving a recorded title can be performed by utilizing this key-word.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information reproducing system, an information recording / reproducing system, and a recording medium applicable to the system, in particular, a reproducible reproducing DVD player, a recording / reproducing DVD player, and a DVD player. Regarding possible optical disks.

[0002]

2. Description of the Related Art In recent years, with the improvement of optical pickup technology using short-wavelength laser beams, advancement of high-density recording technology and data compression technology, the capacity of recording media such as optical discs has been increased, and the use of such media has been increasing. The amount of information that can be recorded has increased dramatically. For example, while the recording capacity of a CD (Compact Disc) having a wavelength of 780 nm, which is a typical optical disc, is about 650 MB, a DVD (Digital Veel) having a wavelength of 650 nm, which is a large-capacity optical disc, is used.
In the Rsatile Disc, it has become possible to record a digital information amount up to about 4.7 GB, which is about seven times the size of a CD on one side, on a recording medium having the same size as a CD and a diameter of 120 mm.

[0003] This increase in recording capacity is further caused by MPEG2 (Movi), which is an international standard for media-integrated moving image compression.
ng Picture Experts Group
Using a data compression technique such as phase 2), approximately 130 minutes of high-quality and high-quality data corresponding to one movie can be recorded on a single-sided, single-layer disc.

Although the above-mentioned optical disk is read-only, a writable DVD-RAM disk is developed with the same large-capacity optical disk, and a recording / reproducing apparatus using the optical disk as a medium can be developed. The environment is being prepared. Thereby, for example, a VCR (Video Cassette Re-set) using the current tape as a medium is used.
corder) can be replaced.

In general, analog VCRs include:
Due to its structure, it is said that arbitrary character information cannot be recorded. For this reason, in order to know the contents recorded on the tape, the user must view all the contents.

In a conventional digital VCR, this problem is avoided by using a tape provided with an IC memory, but the amount of information that can be stored in the tape is limited.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has been made in consideration of a program (movie, drama, etc.) recorded from a TV or the like, and information relating to a video recorded by a user on a camcorder or the like. It is an object of the present invention to provide a recordable optical disk capable of recording the information in association with the video.

Further, the present invention provides a recording / reproducing apparatus capable of recording information on a program (movie, drama, etc.) recorded from a TV or the like or a picture recorded by a user with a camcorder or the like on an optical disc in association with the picture. To be.

[0009] Further, the information on the recorded video can be freely edited by the user, and can also be obtained using external communication means such as the Internet, a return period of a broadcast wave, or the like. This information is used as a menu when a disc is inserted.

An object of the present invention is to provide a recording / reproducing apparatus as described above.

[0011]

According to the present invention, there is provided a recording / reproducing apparatus for recording data of a video program or data of an audio program on an optical disc which can be repeatedly recorded and erased, and for reproducing the data. Input means for inputting search information, registration means for registering search information relating to the input program on an optical disc, reading means for reading the registered search information, and storage means for temporarily storing the read search information And a reproducing / recording executing means for reproducing recorded data with reference to the stored search information or recording new data.

Further, according to the present invention, there is provided a data area in which video or audio program data can be recorded. An object area in which program data is to be recorded, and the control information area records a reproduction information area in which information relating to reproduction control of the program data is recorded and search information for searching for the program data. A search information area, wherein the search information area includes title information of the program data,
An optical disk is provided in which an item belonging to one of the classifications of character information and recording information is defined as an area that can be recorded together with a reference code.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a digital information recording / reproducing system according to an embodiment of the present invention will be described with reference to the drawings.

The recording / reproducing apparatus according to the present invention is called a so-called DVD digital video recorder, and
A moving picture encoded based on G2 can be recorded on the optical disc 10 capable of recording at a variable bit rate, and data of the moving picture can be reproduced from the recordable optical disc 10.

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

As shown in FIG. 1, this optical disk 10
Is a pair of transparent substrates 1 each having a recording layer 17 provided thereon.
4 are bonded together with an adhesive layer 20. Each substrate 14 can be made of 0.6 mm thick polycarbonate, and the adhesive layer 20 is extremely thin (for example, 40 μm thick).
UV curable resin. By bonding the pair of 0.6 mm substrates 14 such that the recording layer 17 is in contact with the surface of the adhesive layer 20, 1.
A large-capacity optical disk 10 having a thickness of 2 mm is obtained.

The optical disk 10 is provided with a center hole 22. Around the center hole 22 on both surfaces of the disk, a clamp area 24 for clamping the optical disk 10 during rotation is provided. The spindle of the disk motor is inserted into the center hole 22 when the optical disk 10 is loaded in a disk drive device (not shown). Then, the optical disk 10 has its clamp area 2
At 4, the disk is clamped by a disk clamper (not shown) while the disk is rotating.

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

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

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

The data recording area 28 is an actual data recording area. As recording / reproducing information, video data (main video data) such as a movie, sub-video data such as subtitles / menus, and speech / sound effects are recorded. Audio data is recorded as a pit row (a physical shape or a phase change state that causes an optical change to the laser reflected light).

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

FIG. 2 shows the recording / reproducing optical disk 1 of FIG.
FIG. 4 is a diagram for explaining a correspondence relationship between a data recording area of No. 0 and a recording track of data recorded thereon.

When the disk 10 is used for recording and reproduction, the disk 10 is used to protect a delicate disk surface.
Is housed in the cartridge 11. When the recording / reproducing disk 10 is inserted into a disk drive of a DVD video recorder described later together with the cartridge 11, the disk 10 is pulled out from the cartridge 11 and clamped to a turntable of a spindle motor (not shown).
It is rotationally driven so as to face an optical head (not shown).

Incidentally, even in the case of the recording / reproducing optical disk 10, the main body of the disk 10 may not be housed in the cartridge 11, and the naked disk 10 may be directly set on the disk tray of the disk drive.

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

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

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

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

As shown in FIG. 3, a lead-in area 27 is provided on the inner peripheral side of the optical disk 10 and a lead-out area 26 is provided on the outer peripheral side thereof. The data recording area 28 is allocated as a volume space 28, which is a space for volume and file structure information (volume / file management area 70) and a space for DVD standard application (DVD data area). 72).

The lead-in area 27 has a read-only emboss zone in which the light reflection surface has an uneven shape, a mirror zone in which the surface is formed by a flat mirror surface, and a rewrite data zone in which information can be rewritten. ing. The lead-out area 26 is composed of a rewrite data zone in which information can be rewritten.

The emboss data of the lead-in area 27
Zones include disk types such as DVD-ROM (read-only DVD disk), DVD-RAM (recording and reproducing DVD disk) and DVD-R (recordable DVD disk), disk size, recording density, and recording start. / Information on the entire information storage medium, such as a physical sector number indicating a recording end position, is recorded. Also, the recording power and recording pulse width required for recording data on the recording layer 17 and the data recorded on the recording layer 17 are recorded. Information on erasing power required for erasing, reproducing power required for reproducing data recorded on the recording layer 17, and information on recording / reproducing / erasing characteristics such as linear velocity at the time of recording / erasing are recorded. Further, in the embossed data zone of the lead-in area 27, information on manufacturing of one information storage medium such as a manufacturing number is recorded in advance. In the rewrite data zone 27 of the lead-in and the rewrite data zone of the lead-out 26, a recording area for recording a unique disc name for each information storage medium, and whether or not recording and erasing are possible by recording and erasing conditions are confirmed. And a management information recording area related to the presence / absence of a defective area in the data area 72 and the address of the area, and a preliminary process for enabling recording of data in the data area 72 is performed. Made in this area, and subsequent recording of data,
Information necessary for erasure and reproduction is recorded.

The volume space 28 is physically divided into a number of sectors, and these physical sectors are numbered consecutively. The logical address of the data recorded in the volume space (data recording area) 28 is
As defined by ISO9660 and the UDF bridge, it means a logical sector number. The logical sector size here is, like the effective data size of the physical sector,
The logical sector numbers are 2048 bytes (2 kbytes), and serial numbers are added to the logical sector numbers in ascending order of the physical sector numbers.

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

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

First, the optical disk stores data in a normal file format, similarly to a normal computer disk. Therefore, UDF bridge and ISO
9660 is supported. Therefore, a volume descriptor (Volume Descriptor) that manages a volume (Volume) is stored in the disk.
And a directory record (DirectoryRecord) for managing each file.

That is, the volume / file management area 70 stores the volume descriptor (Vo) shown in FIG.
(Lumen Descriptor) and a directory record defined to be recorded in a format as shown in FIG.

The directory record shown in FIG.
As a tag identifier of this descriptor, a descriptor tag (Description Tag) is described in a byte position (relative bit position RBP) “0”. At byte positions “16” and “20”, the volume descriptor sequence number (Volume Descriptor) for this descriptor
(Sequence Number) and the primary volume descriptor number (Primary Volume D) for this primary descriptor
(script number) is specified. In the byte position “24”, a volume identifier (Volum
e Identifier) is described at the byte position "
In 56 "and" 58 ", a volume sequence number (Volume Sequence Number) and a maximum volume sequence number (Maxim)
um Volume Sequence Number
r) is described. At byte position “60”, an interchange level (Interchange Level) that determines an interchange level
However, at byte position "62", the maximum interchange level (Maximum Interchan
Ge Level) is described. Further, in the byte position “64”, a character set list (Ch) is set.
arcer Set List), byte position "6"
8 "includes a maximum character set list (Maximum Character Set Li).
st), the byte position “72” has a volume set identifier (Volume Set Identifier).
r) is described. Furthermore, byte position "20"
0 ”is set to the descriptor character set (De
descriptor Character Set, at byte position "264", an Explanatory Character Set (Explanatory Character Set).
er Set), at byte position “328”, a Volume Abstract (Volume Abstract)
t), at byte position “336”, there is a volume copyright notice (VolumeCop) relating to copyright.
(yright Note), byte position “344”
Contains the application identifier (Applicatio)
n Identifier, byte position “376” has a recording date and time (Recording Date).
and Time) are recorded. In addition, the byte position “388” has an implementation identifier (Implementation Identifier).
r), the byte position "420" contains an implementation use (Implementation Use),
The byte position “484” has a predecessor volume descriptor sequence position (Predec
essor Volume Descriptor),
And a flag (Sequen) in the byte position “488”.
ce Location) is described, and a reservation is prepared. As the recording date and time at the byte position "376" of the directory record shown in FIG. 5, the date and time when the DVD disk is formatted are recorded.

In the directory record, the data length (byte length) of the table in which the directory record is described is described at the byte position (relative bit position RBP) "0" as the directory record length. The record length of the attribute added (extent) following the directory record length is the byte position.
1 "and the logical block number of the first logical block allocated to a data file as an extent to be described later, for example, a video data file, an audio data file or a picture data file. When the file or the file is divided, the data length is recorded at byte position “2”, and the data length of the file division is recorded at byte position “10.” The directory record shown in FIG. The date and time when the information in the extent described by this directory record was created, in other words, the date and time when this directory record was recorded, are recorded at byte position "18." Is written at byte position "25", The file flag indicates whether the user has this file, if the file is a directory record, and a directory record is specified, including additional attribute records, and if the user is free to read this without Whether or not the file can be used is recorded, etc. The byte position "26" stores the file
The unit size is recorded. This file unit size does not include interleaved file splits.
In the case of recording in the mode, the size of the file unit for the file division is described. In the case of the non-interleave mode, 0 is designated as this description. At the byte position "27", an interleave gap size is recorded. When the file division is recorded in the interleave mode, the size of the interleave gap for the file division is recorded at the interleave gap size. Is specified. In the case of the non-interleave mode, 0 is specified as this description. A volume sequence number is recorded at the byte position “28”, and the volume sequence number designates an order number in a volume set of a volume in which an extent described by the directory record is recorded. At byte position "32",
The file identifier is recorded, and the length of the file identifier is specified by the number of bytes of the file identifier of the directory record. At the byte position "33", a file identifier is recorded. If the file record does not indicate that the directory record is a directory, the file identifier specifies identification information for the file. If the directory record indicates that the directory is a directory, identification information for the directory is specified. In addition, padding and system use are recorded in this directory record.
Padding or embedding is provided in this directory record only if the length of the file identifier is even. In this case, (00) bytes are set in this field. For system use, that is, for the system, whether or not it is used is optional, and if any, it is reserved for the system. In this case, if it is necessary to make the directory record an even number of bytes, (00) bytes are added to the end of this column.

As shown in FIG. 3, the data area 72 is defined as an area in which computer data and audio / video can be mixedly recorded. The recording order of the computer data and audio / video and the size of each recording information are arbitrary. Is recorded as an audio and video data area 76. The computer data areas 74-1 and 74-2 include a recording area 7
In the case where only audio and video data is recorded in the recording area 72, the audio and video data area 76 does not need to be provided due to its nature. Is not necessarily provided due to its properties. The computer data areas 74-1 and 74-2 and the audio and video data area 76 are each composed of one or more files in which audio data, picture data and / or video data are stored.

One disc has control information (Control Inform) as information for managing the audio / video data of the disc.
area (file) referred to as (ation: CI) 78;
AV data (video / audio and / or picture /
Data files 82, 84,
86. That is, in the audio and video data area 76, as shown in FIG. 3, control information 78 necessary for performing each process of recording (recording), reproduction, editing, and search, and a reproduction target, that is, 1 as a content.
Alternatively, a video object set 80 including a plurality of video objects 82, 84, 86 is recorded. The video object 80 includes a video object set 82 whose content is video data, a still image such as a still / slide content, a picture object 84 which is picture data of reduced map control information, and an audio content There is an audio object 86 that is data. As is evident, it is sufficient for the video object set 80 to consist of at least one of these objects 82, 84, 86 and all objects 82, 84, 86
It is not necessary to provide. Similarly, objects 82, 84,
Reference numeral 86 denotes one or more files.

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

As shown in FIG. 3, a logical video object set 80, ie, video, picture and audio objects 82, 84 and 86, is composed of a plurality of cells 94, and each cell 94 has one or more cells. The video object unit (VOBU) 96 of FIG.
In this cell 94, the video object unit (VOBU) 96 is decoded and reproduced in the order of arrangement in the cell 94 in principle. Each video object unit 96 includes a video pack (V pack) 8
8. An aggregate (pack sequence) of sub-picture packs (SP packs) 92 and audio packs (A packs) 90, which is defined as data to be reproduced for a fixed period, for example, 0.5 to 1.2 seconds Is done. These packs are the minimum units for performing data transfer processing, and data is processed using logical cells as the minimum units. This video object unit (VOBU) has an identification number (IDN).
#K; k = 0 to k), and the video object unit 96 can be specified by the identification number. This video object unit (VOB)
The playback period of U) 96 usually corresponds to the playback time of video data composed of one or more video groups (group of pictures; GOP for short) included in video object unit (VOBU) 96. . Normal,
One GOP is usually about 0.5 seconds in the MPEG standard, and is screen data compressed so as to reproduce about 15 frame images during that time.

The video object unit VOBU
If 96 contains video data, video pack 8
8, a GOP (conforming to the MPEG standard) composed of a sub-picture pack 90 and an audio pack 11 is arranged to form a video data stream. In addition, even if the playback data is only audio and / or sub-picture data, one video object unit (VOBU) 96
Reproduction data is configured as a unit. For example, as in the case of a video object VOB of video data,
An audio pack 90 to be reproduced within the reproduction time of the video object unit (VOBU) 96 to which the audio data belongs is stored in the video object unit (VOBU) 96.

The video objects 82, 84, 86 constituting the video object set 80 are assigned identification numbers (IDN # i; i = 0 to i), and the video objects 82, 84, 86 are identified by the identification numbers. Can be identified. Each cell 94 has an identification number (C) as in the case of the video objects 82, 84, 86.
_IDN # j).

FIG. 7 shows the general structure of the video pack 88, the sub-picture pack 92 and the audio pack 90. All of these packs are composed of data in units of 2048 bytes, similarly to the logical sector shown in FIG.
Video, audio and sub-picture packs 88, 90, 92
Is composed of a pack header 98 and a packet 100 as shown in FIG. The packet 100 includes a packet header, in which a decode time stamp (DST) and a presentation time stamp (PTS) are recorded.

As described above, the files 82, 84,
86 has a hierarchical structure as shown in FIG.
One file 82, 84, 86 is composed of a plurality of cells 94, and one cell 94 is composed of a plurality of video object units (VOBU) 96. Also, V
The OBU 96 is composed of packs 88, 90, and 92 each of which includes a plurality of various types of data. Each of the packs 88, 90, and 92 includes one or more packets 100 and a pack header 98. Pack 8
8, 90 and 92 are minimum units for performing data transfer processing. Further, the minimum unit for performing logical processing is a cell unit, and processing is logically performed in this unit. Also, during playback,
The reproduction is performed by determining the reproduction order on a cell-by-cell basis. As will be described later, a set of cells collected in this reproduction order is called a program (PG), and one connection of the PG is called a program chain (PGC). The management of the cell information (CI) is managed on a PGC basis.

The control information shown in FIG. 3 includes reproduction control information 102 indicating control information necessary for reproduction, recording control information 104 indicating control information required for recording (recording / recording), and control information required for editing. Edit control information 106, thumbnail picture control information 108 indicating management information relating to a thumbnail for searching or editing a place to be viewed in video data, and detailed information relating to a recorded video, that is, keyword information 109 describing a keyword. I have.

The reproduction control information 102 shown in FIG. 3 has a management information table (PLY_MA) as shown in FIG.
T) 122 and a program chain (PGC) information table (PGCIT) 110. Information as shown in FIG. 9 is described in the management information table (PLY_MAT) 122, and the program chain (PG
C) The information table 110 has a data structure as shown in FIG.

As shown in FIG. 10, the PGC information table 110 includes PGC information management information 112, a search pointer (#n) 114 for searching each PGC information, and a PGC information (#n) 114. # 1) to PGC information (#n) 116. The program chain (PGC) information table 110 describes information on the program chain (PGC) and the reproduction order of the cells, and is composed of data of the cells 94 recorded in the video object 82, that is, a video object unit 96. Movie data as actual data is reproduced in accordance with the description of the program chain (PGC) information table 110. This program
The chain (PGC) information table 110 includes PGC information management information 112, PGC information (#n) to PGC information (#n), and PGC information (# 1) 116 to PGC information.
It comprises a search pointer 114 for searching for information (#n) 116. When the PGC number is determined, the reproduction order of the cell for reproducing the PGC corresponding to the PGC number is obtained by referring to the search pointer 114, and the actual reproduction order from the video object 82 is obtained in accordance with the reproduction order of the cell. Cell 94 as data
And the video is played. here,
Although the video object 82 has been described, the picture object 84 and the audio object 8
Similarly, the program chain (P
According to the description of the GC) information table 110, cell data as actual data is extracted and reproduced.

Here, the PGC corresponds to a chapter in a movie story, and indicates a unit for executing a series of reproductions in which a cell reproduction order is specified. In other words,
One PGC into one drama, for example, this PGC
Correspond to various scenes in the drama. Specifically, if there is a certain video data stream as shown in FIG. 11 (a), the video data stream
A set of video object units 96, which are partitioned into units 96 and are essentially continuous, are defined in cells 94.

Here, the video object unit 9
6 are, in principle, continuous, so that the PGC information 116 and, more specifically, the cell playback information 120, as described later, contain the first video object unit 96 and the last video object A cell 94 is defined in unit 96; That is, the cell reproduction information 120
In the cell reproduction information in, information of a reproduction section specified by a start address and an end address of reproduction data constituting a cell is described.

When the cell 94 is determined, the PGC is constituted by determining the reproduction order of the cell. For example, as shown in FIG. 11B, cell-A, cell-B, cell-C
The PGC (# 1) is defined by arranging three cells 96 in the cell reproduction information table so that the cells are reproduced in the order of. Similarly, PGC (# 2) is defined by arranging three cells 96 in a cell reproduction information table so that cells are reproduced in the order of cell-D, cell-E, and cell-F. Cell-R, cell-S, cell-T,
By arranging the five cells 96 in the cell playback information table so as to be played back in cell-U order,
(# 3) is defined. Here, PGC (# 1) and PGC
By linking the GCs (# 2) to each other, the PGC (# 1) corresponding to a certain chapter is reproduced after the PGC (# 1) corresponding to a certain chapter. In other words, cell-A to cell-F are continuously reproduced. In the PGC, the cells 94 are reproduced in the arrangement order. However, since the configuration of the PGC and the reproduction order of the PGC are arbitrary, for example, a certain PGC is replaced with another PGC.
Since the cell can be defined by configuring, and the way of linking, that is, the link information can be arbitrarily determined,
Various stories can be created or edited. For example, after PGC (# 1), PGC (#
3) can be linked, and the same cell, eg, cell G, can be added to PGC (# 1) and PGC (# 2) to provide different chapters, and PGC (# 1) can be selected by the user. ) Or PGC (# 2) followed by PG
By linking C (# 3), an arbitrary story can be reproduced.

As shown in FIG. 9, the reproduction management table (PL
Y_MAT) 122 describes an identifier ID indicating playback control information, and the start address (VOBS_SA) and end address (VOBS) of the video object set 80.
BS_EA), and control information (CTLI) 102
End address (PLII_EA) of playback control information (PLYI) 102
Is described. The reproduction management table 122
Describes an attribute (CAT) that the management information belongs to the format of the recording / reproduction DVD.
The attribute of the video in the video object set recorded in the video data area 76, for example, the attribute of the NTSC system, wide, etc., is described, and the number of audio streams in the video object set similarly recorded (AST)
_Ns) and its attributes, for example, a table (AST_ATR) describing the compression method and the like, and a table describing the number (SPST_Ns) of the sub-picture streams in the similarly recorded video object set and its attributes (SPST_ATR) is described.
Further, the reproduction management table 122 describes the start address of each information shown in FIGS. That is, in the reproduction management table (PLY_MAT) 122, the start address (REC_SA) of the recording control information 104, the start address (ECI_SA) of the edit control information 106, the start address (TPCI_SA) of the reduced map control information 108, and the start of the keyword information 109 The address (KI_SA) is described.

The PGC information management information (PGC information) shown in FIG.
_MAI) 112 includes information indicating the number of PGCs as shown in FIG.
14 includes information that points to the beginning of each piece of PGC information, as described above, and facilitates PGC search. The PGC information 116 includes PGC general information 118 shown in FIG. 10 and one or more pieces of cell reproduction information 120 shown in FIG.

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

The PGC general information (PGC_GI) 118 includes information indicating the PGC reproduction time and the number of cells, as shown in FIG. That is, the PGC general information (PGC_GI) 118 includes the number of the PGC, the contents of the PGC (PGC_CNT) describing the number of cells, and the PGC.
A table (PGC_AST_CTL) in which information for controlling the reproduction time of the GC (PGC_PB_TM), the audio stream included in the PGC, and the PGC
Describes a table (PGC_SPST_CTL) in which information for controlling the sub-video stream included in the file is described. The PGC general information (PGC_GI) 118 includes link information related to the PGC to be linked to the PGC, for example, a PGC navigation control (PGC) describing a previous PGC, a next PGC, or a jump (GOup) PGC. PGC_NV_CTL), a sub-picture pallet table (PGC_SP_PLT) in which reproduction information about the colors of the sub-picture pallets and the like are described, and P
A start address (PGC_PG) of a program table (not shown) in which a list of programs constituting the GC is described.
MAP_SA) is described. Further, this table (PGC_GI) includes cell reproduction information (CELL_PL).
Y_I) 120 start address (CELL_PLY_I)
_SA), a flag indicating whether there is menu data created by the user for the PGC (01: menu data, 00: no menu data), and reservation.

The cell reproduction information (CELL_) shown in FIG.
The PLY_I) 120 describes a cell category (C_CAT) as shown in FIG. 14, for example, whether the cell belongs to a block, and if so, whether the block is an angle block. In addition, cell playback information (CEL
L_PLY_I) 120 describes a reproduction time (absolute time) of a cell in the PGC. Further, in the cell reproduction information (CELL_PLY_I) 120, the start address (CELL_SA) and the end address (CELL_EA) of the cell include the addresses of the first and last video object units (VOBU) in the cell from the beginning of the video object set 80. Described by relative address.

Here, the angle block means a block whose angle can be switched. Angle switching means changing the angle at which the subject image is viewed (camera angle). In the example of a rock concert video, in the same music performance scene (same event), scenes viewed from various angles, such as a scene captured mainly by vocalist, a scene captured mainly by guitarist, a scene captured mainly by drummer, etc. Means you can.

Angle switching (or angle changing) is performed when the angle can be selected according to the viewer's preference, or when the same scene is automatically changed in the flow of the story while changing the angle. (If the software creator / provider configured the story in that way; or if the user of the DVD video recorder made such editing).

The recording control information 104 shown in FIG. 8 includes a recording management table (REC_MAT) 1 shown in FIG.
26 and the recording information table (REC_
IT) 124. The recording management table (REC_MAT) 126 in FIG. 15 includes the end address (RECI_EA) of the recording control information 104, the recording management table 1
26, an end address (REC_MAT_EA) is described, and a free area (FREE_SPACE) for writing information related to recording management is provided. The recording information table (REC_IT) 124 in FIG. 6 includes an end address (REC_IT) of the recording information table (REC_IT) 124, the number (n) of program chains recorded in the data area 76, and a program chain (# 1).
Is recorded, the program chain (#
1) The recording date and time of (PGC # 1) is recorded.

Keyword information 1 shown in FIGS. 3 and 8
In 09, the items of the items belonging to the keywords of the predetermined classification shown in FIGS. 17 to 19 are recorded. The keyword tables shown in FIGS. 17 to 19 are classified into a large classification and a small classification following the keyword code. A typical search item is described. More specifically, the keyword code numbers 30 and 31 generally belong to a large category, and their auxiliary categories include names and comments. This corresponds to the name of the person who wrote the keyword information and its comment. Also, keyword code numbers 38, 39, 3A, 3B, 3C, 3F
Belongs to the title name in a large category, and its subcategories are series, movies, video music albums, songs, and others.
In the case of recording a normal movie, the keyword information (# 1)
In the area 109, as shown in FIG. Also, keyword information (# 4) 10
When 9 is recorded, 39h is recorded as shown in FIG.
Recorded as locker. Keyword code number 40, 4
1, 42, 43, 44, and 47 are subtitles in the large category, and similarly, series, movie,
There are video music albums, songs, and more. Keyword code numbers 50, 51, 51, 52, and 53 have other names in the major category, and scenes, cuts, takes, and labels as auxiliary categories. Keyword code number 58, 5
Reference numeral 9 denotes a language, which is classified as a small classification into a language and an original language. This classification is recorded, for example, as 58h English in the keyword information (# 1) 109 as shown in FIG. Furthermore, the keyword code numbers 5C, 5C
D, 5E, 5F, 60, 61, 62, 63, 64, 6
Reference numerals 5, 66 and 67 are classifications related to works, and correspond to small classifications from picture size to age as shown in FIG. Keyword code numbers 6C to 6F, 70
-79, 7A-7F, 80-89, and 8A-8D are classifications relating to characters, and correspond to actors from the leading actor to the artists as shown in FIGS. Specifically, 61h Robert Denny is recorded in the keyword information (# 1) 109 as shown in FIG.
6 is recorded as 61Ch Sylvester Stalon Dennis in the keyword information (# 5) shown in FIG. 18 and FIG.
As shown in FIG. 9, a classification and an auxiliary classification corresponding to each keyword code number are defined.

In the keyword table, particularly important items include items recorded in keyword code numbers D0 to DF. The items of this record include the keyword code number D
0 and D1 have a recording start time and a recording end time, and keyword code numbers D2, D3, D4, and D5 have a last update time, a last access time, a recording channel, and a URL. As will be described in detail later, this keyword is stored in the memory by making a recording reservation, the item is monitored by the MPU, recording is started on a predetermined channel at a predetermined time, and recording is ended at a predetermined time. . That is, when the time matches the predetermined recording start time in the keyword information,
A predetermined channel in the keyword information is automatically selected and recording is started on that channel. When the time matches the predetermined recording end time in the keyword information, the recording is ended. Here, the last update time in the keyword information is
The time at which the PGC corresponding to certain keyword information or the keyword information itself is updated, for example, the time at which the recording start time and the recording end time are updated corresponds to the PGC. If the time information of the program is included in the vertical blanking period of the television signal, the MPU always monitors the time information of the program, and the recording start time and the recording end time of the channel to be recorded are determined for some reason. Then, the recording start time and the recording end time in the memory and the recording start time and the recording end time in the keyword information are automatically updated. In this case, the last update time is MP
This is the date and time when U has updated the record information. In the URL of the keyword code number D5, when the device can be connected to the Internet and the user connects to the Internet for program reservation, a URL from which information on the program reservation can be obtained is described. When a user connects to this URL and designates recording of a specific program, information related to the program is written into the keyword information by the MPU. For example, when booking a sports program,
The title of the battle is recorded as keyword information, and its recording start time and recording end time are similarly written as keyword information. In addition, information related to the title written in this URL is automatically written in the keyword information by the MPU.

In the keyword information (#n), a PGC information number (#n) which is referred to when searching for this information and executing reproduction may be recorded. This PGC information number (#
n) corresponds to the number of the PGC information shown in FIG.
By referring to this number, search and search of PGC information
The pointer 114 is obtained, and the PGC information 116 is obtained. It should be noted that this PGC information number does not need to be displayed in the menu at the time of search, which will be described later, since it is a matter that the user does not particularly need to know.

FIG. 20 shows the disc shown in FIG.
1 illustrates a configuration of a DVD video recorder that records and reproduces digital moving image information at a variable recording rate by using information having a structure as described above.

The apparatus main body of the DVD video recorder shown in FIG.
A disk drive unit 32 that drives the disk 10 to rotate and reads and writes information on the disk 10;
It comprises an encoder unit 50 constituting the recording side, a decoder unit 60 constituting the reproducing side, and a microcomputer block 30 for controlling the operation of the apparatus main body.

The encoder section 50 includes analog / digital converters (A / D) 52-1, 52-2, 52-3, a video encoder (V encoder) 53, an audio encoder (A encoder) 54, A video encoder (SP encoder) 55, a multiplexing unit (MUX) 57, and formatters 56-1, 56-2, and 56-3 are provided.

Analog / Digital Converter (A / D) 52
-1, a TV set 44 via the video input section 42-1.
-2 or an analog video signal from a video camera 44-3 or from a built-in television tuner 44-1. Analog-to-digital converter (A / D) 52-
2 is provided with a TV tuner 44 via a voice input unit 42-2.
-1, TV set 44-2 or video camera 44-
2, an analog audio signal is input. The analog-to-digital converter (A / D) 52-1 digitizes the input analog video signal at, 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 chrominance component Cr (or YR), and the chrominance component Cb (or YB) is quantized by 8 bits.) Similarly, an analog-to-digital converter (A / D) ) 52-2 converts the input analog audio signal into, for example, a sampling frequency of 48.
Digitization is performed at kHz and a quantization bit number of 16 bits.

Further, an analog / digital converter (A / D
D) 52-3 receives a title signal as a video signal from an external device such as a personal computer or a word processor from the title input unit 42-3, and converts the signal into an analog / digital converter (A / D) 52. Converted into a bit pattern by -3. When a bit pattern is directly input to the title input section 42-3 as a title signal, the signal is converted to an analog / digital converter (A / A / D).
D) It simply passes through 52-3.

The analog-to-digital converter (A /
D) When a digital video signal is input to 52-1, the analog / digital converter (A / D) 52-1 passes the digital video signal through. (The processing of reducing only the jitter accompanying the digital signal without changing the content of the digital video signal or the processing of changing the sampling rate or the number of quantization bits may be performed.)

Similarly, an analog / digital converter (A /
D) When a digital audio signal is input to 52-2, the analog / digital converter (A / D) 52 passes the digital audio signal through. (The processing of reducing only the jitter accompanying the digital signal without changing the content of the digital audio signal or the processing of changing the sampling rate or the number of quantization bits may be performed.)

Analog / Digital Converter (A / D) 52
The digital video signal component from −1 is sent to the multiplexing unit 57 via the video encoder (V encoder) 53. Also, an analog / digital converter (A / D) 52-
The digital audio signal component from 2 is sent to a multiplexing unit 57 via an audio encoder (A encoder) 54. Similarly, an analog / digital converter (A /
D) The title bit pattern from 52-3 is supplied to the multiplexing unit 5 via the sub-picture encoder (SP encoder) 55.
7

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 and packetizing it.

The A encoder 54 converts the input digital audio signal into a digital signal (or a linear PCM digital signal) compressed at a fixed bit rate based on the MPEG or AC-3 standard, and packetized. With the ability to

Sub-picture encoder (SP encoder) 55
Has a function of performing run-length compression on the input bit pattern of the title and packetizing it.

When a DVD video signal having a data configuration as shown in FIG. 6 is input from the AV input section 42 (for example, a signal from a DVD video player with an independent output terminal for a sub-video signal), or When a DVD video signal is broadcast and the selected program is received by the TV tuner 44-1 or the TV set 44-2, the sub video signal component (sub video pack) in the DVD video signal is It is input to an encoder (SP encoder) 55. The sub-picture data input to the SP encoder 55 is arranged in a predetermined signal form, and
Sent to

The multiplexing section (MUX) 57 multiplexes the packetized video pack, audio pack and sub-picture pack and supplies the multiplexed packet to the file formatter 56. That is, in the multiplexing unit (MUX) 57, the video, audio, and sub-picture data encoded by the respective encoders are packetized and packed, respectively, and are converted into video packs, audio packs, and sub-picture packs.
Multiplexed to form a PEG2 program stream.

The formatter 56 performs predetermined signal processing on the input video signal, audio signal, sub-picture signal and the like while using the memory 34 as a buffer memory, that is, as a work area. The recording data is converted into recording data conforming to the format (file structure) as described in FIG. The output physical data is recorded on the optical disk 10 in the disk drive unit 32. In the formatter 56-1, video, audio and sub-picture packets 88, 9
0 and 92 are combined to define a video object unit 96.
Defines a cell 94, and a file of reproduction data as a video object set 80 is created as a set of the cells 94. The data for creating this file is supplied to the volume formatter unit 56-2 to create a file of the control information 78 shown in FIG. 3, and the control information 78 and the video object set 80 are combined and shown in FIG. Logical record data of the structure to be created is created. The logical recording data is physically formatted by the disk formatter unit 56-3 and converted into physically recordable data.
2 is supplied. In other words, the file formatter unit 56-1 and the volume formatter unit 56-2 described above.
Is a logical formatter, and the data formatted here is converted into a physical format by a disk formatter 56-3, which is a physical formatter. The data of the physical formatter is recorded on the disk 10 via the disk drive unit 32.

Here, the contents of standard encoding processing for creating the recording data will be briefly described. That is, when the encoding process is started in the encoder unit 50 of FIG. 20, parameters necessary for encoding the video (main video) data and the audio data are set. Next, the main video data is pre-encoded using the set parameters, and the optimal code amount distribution for the set average transfer rate (recording rate) is calculated. Encoding of the main video is executed based on the code amount distribution obtained by the pre-encoding in this manner. At this time, the encoding of the audio data is also executed at the same time.

As a result of the pre-encoding, when the amount of data compression is insufficient (when the desired video program cannot fit on the DVD-RAM disk or DVD-R disk to be recorded), if there is a chance to pre-encode again (For example, if the recording source is a repeatable source such as a video tape or a video disc), partial re-encoding of the main video data is performed, and the re-encoded portion of the main video data is pre-encoded. Is replaced with the main video data portion. By such a series of processing, the main video data and the audio data are encoded, and the value of the average bit rate required for recording is greatly reduced.

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

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

That is, main video data (video data)
Is set as the minimum unit, and cell reproduction information (CELL_PLY_I) as shown in FIG. 14 is created. Next, the configuration of the cells constituting the program chain (PGC), the attributes of the main video, the sub-video and the audio, and the like are set. The reproduction control information 102 including the various information described with reference to FIGS. 3 and 8 is created.

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

Then, the data is grouped into VOBUs 96 as data to be reproduced within a predetermined time so that the data can be reproduced in the order of the time code. A VOB is configured. V that summarizes one or more VOBs
OBS 80 is formatted into the structure of FIG.

A disk drive unit that reads and writes (records and / or reproduces) information on the DVD disk 10 includes a disk drive 32, a memory 34, a data processor, ie, an MPU 36, and a clock unit, ie, a system. A time clock (STC) 38.
Further, the disk drive unit includes a recording reservation memory 29 in which reservation information for program reservation is stored. The recording reservation memory 29 includes a recording reservation channel corresponding to the keyword code D4 in the keyword information described above,
At least a recording start time corresponding to the keyword code D0 and a recording end time corresponding to the keyword code D1 are recorded. In this recording reservation memory 29, the user can directly input recording reservation information to the MPU 36 using the key input unit 43 and record it. Further, in a system in which a modem 45 is connected to the MPU 36 and this modem can connect to the Internet via the communication terminal 59, when a user connects to a specific URL and searches for a program to specify a program, The specific program information acquired at the URL is downloaded, and the information is stored in the recording reservation memory 29. The downloaded specific program information is written in the keyword information 109. Further, when program information is included in the vertical retrace period of the television signal, the program information in the television signal is monitored by the MPU 36 and the recording reservation memory 29
It is always checked whether the program information stored in is stored. That is, the output of the A / D converter 52-1 connected to the television tuner 44 is supplied to the MPU 36, and the program information is periodically acquired by the MPU 36. The acquired program information is extracted from the keyword information 109 and compared with the program information stored in the recording reservation memory 29. When the program is changed for some reason, for example, the start time and the end time are changed, Updates the contents of the recording reservation memory 29 to the latest information. The update reservation information is written in the keyword information 109.

The environment information setting unit 4 connected to the MPU 36
Reference numeral 7 includes a programmable ROM or the like, and stores information for setting an environment relating to recording. That is, when the user desires to periodically monitor the program information in the television signal via the key input unit 43, the monitoring is set, and the program in the television signal is periodically determined as described above. The information is obtained by the MPU 36, and the information is compared with the reservation information. If the environment information setting unit 47 is set to acquire program information for periodically extracting program information from the Internet, the MPU 47 operates the modem 45 periodically to extract program information from the URL. The program information is compared with the program information stored in the recording reservation memory 29. Similarly, when the program is changed for some reason, for example, when the start time and the end time are changed, the contents of the recording reservation memory 29 are updated to the latest information. Written in information 109. The environment information setting unit 47 includes:
In addition to the setting of such a recording environment, it is possible to make settings relating to reproduction such as starting reproduction at a predetermined time.

The bit map forming unit 144 for creating a menu for recording the keyword information 109 and a menu for retrieving the keyword information 109 is provided by the MPU unit 36.
It is connected to the. In the bitmap forming unit 144, M
The character string is received from the PU unit 36, converted into a bitmap, that is, converted into menu image data, and output to the video processor 66. Therefore, a menu image can be displayed on the monitor 48 as described later in detail. This bitmap forming unit 144 is used when the user requests a keyword input mode for inputting the keyword information 109 from the key input unit 43, or when the user requests a keyword search mode for searching the keyword information 109. A predetermined menu image is generated by the bitmap forming unit 144 and displayed on the monitor 48. In the keyword input mode, for example, a menu image of the keyword input mode as shown in FIG. 30 is displayed. In the keyword search mode, a menu image of the keyword search mode as shown in FIG. 29 is displayed as an example. By operating the key input unit 43 as shown in FIG. 24 on this menu screen, the keyword information is input, and the keyword information is searched.

The decoder section 60 controls the control information 7 shown in FIG.
8 is received from the disk drive unit 32, and a data processor unit 61 that controls the disk drive unit 32 according to the control information is provided. That is, the data processor 61 performs signal demodulation and error correction of data output from the disk drive 32. Following the control information 78, the data processor 61 receives DVD playback data having a pack structure as shown in FIG.
2 The separating unit (DMUX) 61 separates and extracts each pack from the supplied data, and stores in the memory 34 the data used for executing the signal processing extracted at the time of the pack separation. That is, the separation unit (D
The MUX) 62 converts a data stream in a pack format, which is output from the data processor unit 61 and forms a time-division multiplexed MPEG2 program stream shown in FIG. The audio data is divided into three sub-picture packs and audio packs composed of audio data. Each data is referred to the transfer time and the ID data indicating the type of data, and each data is referred to the video decoder section 64 and the sub-picture decoder section 65. The control data is supplied to each decoder of the audio decoder unit 68, and the control data is transferred to the memory unit 34 which can be referred to by the system MPU unit 36. The main video data separated by the separation unit 62 is supplied to a video decoder (V decoder) 6.
4 and the sub-picture data (contents of the sub-picture pack 92) separated by the separation unit 62 are output from the sub-picture decoder (S
Audio data (contents of the audio pack 90) decoded by the P decoder 65 and separated by the separation unit 62
Are decoded by the audio decoder 68. The video processor 66 appropriately combines the video data from the video decoder 64 with the sub-picture data from the SP decoder 65, outputs a subtitle and other sub-pictures superimposed on the main picture, and outputs a digital video from the video processor 66. ,
Video / Digital / Analog Converter (V / D / A) 67
Is converted to an analog video signal, and the digital audio output from the audio decoder 68 is converted to an audio / digital / analog converter (A / D / A) 6.
9 and converted into an analog audio signal.

The video / digital / analog converter (V.
The analog video signal from the D / A) 67 and the analog audio signal from the audio / digital / analog converter (A / D / A) 69 are monitored via the video output unit 46-1 and the audio output unit 46-2. It is supplied to the TV 48 and the speaker unit 49.

The bitmap forming section 144 already described
Receives a character string specified in the keyword input mode or the keyword search mode, converts the character string into a bitmap, and outputs the bitmap to the video processor 66 as a menu image signal. This menu image signal is output from a video / digital / analog converter (V / D / A).
The video signal is converted into an analog video signal by
The data is output to the monitor TV 48 via -1 and displayed as a menu screen.

The data processing operation in the above-described DVD video recorder, that is, the recording process and the reproducing process will be described with reference to FIG.

The process is started in step S1 and the DVD-
When the RAM disk 10 is loaded in the player, the DVD
If the disk 10 has not been formatted yet, the disk is first formatted as shown in step S2, and then the recording process is started. At the time of data processing at the time of recording, first, the user operates the key input unit 4.
When the MPU unit 36 receives a recording command by key input via the control unit 3, the necessary management data is read from the DVD disk 10 from the drive unit 32 and the area to be written is determined. Next, a management area is created so as to write the recording data in the area determined as shown in steps S3 and S4, necessary information is written, and a write start address of video data is set in the drive unit 32,
Prepare to record data.

Here, the management area to be set includes a file management unit (indicating a directory record in ISO9660) for managing files and control information (CI) 7.
8, necessary parameters are recorded in the file management unit.

Next, the MPU unit 36 resets the time in the STC unit 38. Here, the STC unit performs recording and playback based on this value using a timer of the system.

[0096] Further, the MPU unit 36 makes other settings, and thereafter, the recording is started as shown in step S5.

Here, the flow of the video signal is as follows. That is, first, the A / D converter 52-1 and the A / D converter 52-2 convert the video signal and the audio signal input from the TV tuner unit 44-1 or the external input into an A / D converter.
D-converted, the video signal from the video encoding unit 53, the audio signal from the audio encoding unit 54, and the TV tuner unit 44-1 or the title input 42-3. Are input to the SP encoding unit 55, respectively.

Each decoding unit compresses each signal into packets (however, each packet is divided into packets of 2048 bytes per pack when packed, and packetized). input. Here, each of the decoders 53, 54, and 55 outputs the PTS, DT of each packet according to the STC value of the clock 38.
S is determined and recorded as needed. The clock 38
It has a function of counting date data such as year, month, day, hour, minute, second, and day of the week.

The formatter section 56-1 includes the memory section 34
The packet data is temporarily stored, and then the input packet data is packed, mixed for each GOP, and input to the volume formatter unit 56-2. The volume formatter unit 56-2 creates control information for the data having the structure of the MPEG data stream, and supplies the data to which the control information is added to the disk formatter 56-3.

In the disk formatter 56-3, 16
ECCs are attached to each pack to form an ECC group and sent to the drive unit 32. However, if the drive unit 32 is not ready for recording on the disk 10, the data is transferred to the memory unit 34 and waits until data is ready to be recorded, and recording is started when the preparation is completed.

At the end of the recording, as shown in step S5, necessary information is recorded in the reproduction control information 102 of the control information 78 and the volume & file management area 70 after the end, and the recording operation ends. Thereafter, the reproduction operation can be performed as shown in step S6.

In the data processing at the time of reproduction, first, when the MPU unit 30 receives a reproduction command by a key input by the user, the MPU unit 30 reads the volume & file management area 70 from the drive unit 32 through the data processor unit 61 and reproduces the data. Determine the address to be used. Here, the management area indicates a volume descriptor and a file management unit, and the volume descriptor indicates that the disc is a DVD.
It is determined whether the disc is a disc, the control information 78 is extracted from the information of the file management unit, and the video objects 82, 84, and 8 corresponding to the title to be reproduced from the control information 78.
6, a PGC number to be reproduced is determined, and an address to start reproduction is determined.

Next, the MPU unit 30 sends the address of the data to be reproduced and the read command determined earlier to the drive unit 32. The drive unit 32 reads the sector data from the disk 10 in accordance with the sent command, performs error correction in the data processor unit 61, and outputs the data to the separation unit 62 in the form of pack data.

The separating section 62 packetizes the pack data, transfers video packet data (MPEG video data) to the video decoding section 64 and transfers the audio packet data 68 to the audio decoding section 68 according to the purpose of the data. The sub-picture packet data is transferred
Transfer to P decoding section 65. At the start of transfer, the transmitted packet data loads the PTS into the clock unit 38, and sets the PTS in the pack to the clock unit 38 by the MPU unit 30 or automatically sets the video decoder unit 64 to the video unit. The PTS of the data is set in the STC section.) Thereafter, each decoding section synchronizes with the value of the PTS (presentation time stamp) in the packet data and sets (P
Playback processing is performed (by comparing the values of TS and STC), and T
V can play a moving image with audio subtitles.

Next, the operation of the scheduled recording of a program will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG.

When program reservation recording is started in step 10, it is confirmed whether or not the recordable / reproducible optical disk 10 is loaded in the disk drive unit 32 as shown in step S11. When it is confirmed that the disc is loaded, as shown in step S12, the MPU unit 36 acquires the recorded contents of the disc and the start position of the unrecorded area in advance when the power is turned on or when the disc is loaded, and the control information 7
It is confirmed whether the keyword information 109 in 8 includes information for program reservation recording. As shown in step S14, if the keyword information 109 includes program reservation information, particularly, recording start time, recording end time, and recording channel,
This information is stored in the recording reservation memory unit 29.

The MPU unit 36 compares the recording start time stored in the recording reservation memory unit 29 with the current time acquired from the clock unit 38 as shown in step S15. The recording of the channel described in the section 29 is started.

When recording is started, the data encoded by the sub-picture encoder 55 and the data encoded by the sub-picture encoder 55 are combined with the data encoded by the video encoder 53 and the audio encoder 54 as shown in step S16.
In, a pack sequence is converted into a pack / packet format, and a pack sequence is generated by time division multiplexing. The pack sequence generated as shown in step S17 is stored in the file formatter unit 56.
-1 is converted into the video object 82 or the audio object 86 shown in FIGS.
The data is converted into physical data by the formatter 56-2, and the video data file is recorded on the disk by driving the disk drive unit 32 as shown in step S18.

Further, as shown in step S 19, control information is obtained from the memory unit 34, and keyword information 109 is obtained from the recording reservation memory unit 29. As shown in step S20, the control information is recorded on the disk by driving the disk drive unit 32. Here, since the control information 78 includes the address information of the video object 82 or the audio object 86, it is necessary to write the control information 78 again after the recording in step S17 described above. When the control information 78 is written, the recording of the program ends as shown in step S21.

In the flow of FIG. 22, in the case of an optical disk on which nothing has been recorded yet, after the formatting process and the creation of the management area in steps S2 and S3 shown in FIG. 21, the control information 78 shown in FIG. Only the writable control information 78 therein, for example, only the identifier and the start address of the keyword information are recorded, and the program reservation information is recorded at the start address of the keyword information as shown in step 14 of FIG. Then, step S18
After the recording of the video data file is completed, the control information 78 is rewritten again as shown in steps 19 and 20.

At step 20 in the flow of FIG. 22 or after the end of recording at step S21, an arbitrary character string can be input using the key input section 43, and the detailed contents of the keyword information can be freely edited. is there. FIG.
An example of the user editing will be described with reference to FIG. In the menu screen shown in FIG. 23, the recorded video is taken out and displayed on the video processor 66 in a reduced size. This reduced display is similar to the video reproduction described above, and the MPU unit 36 sets the keyword information input mode to generate a reduced image by the video processor 66. Further, the video processor 66 generates a menu image signal obtained by synthesizing the menu screen formed by the bitmap forming unit 144 and the reduced image, and outputs the menu image signal to the monitor unit 4.
8 can be displayed.

On the menu screen shown in FIG. 23, an information input mode is displayed, and items of a recording start time and a recording end time are displayed as character information. When the user sets the time for the items of the recording start time and the recording end time using the key input unit 43 shown in FIG. 24, the time is displayed. The setting of the time is set by successively changing or confirming the highlighted time, as already known. Similarly, the menu screen has a recording channel item, and this item is also set by changing or fixing the recording channel with the recording channel highlighted. The title item, the director item, and the leading actor item can determine the character by selecting the displayed character. A reduced image is displayed in the menu screen, and this image may be a still image or a moving image.
Note that, when recording is not yet performed and a recording reservation is made on the menu screen of this information input mode, the reduced image
Do not show. When a keyword other than the items shown in FIG. 23 is input, it is displayed by requesting the display of another menu screen. As already mentioned, UR
When inputting with the program information from L, the user simply terminates the input of the keyword information to end the information input mode.

Next, various modes for starting recording using the program reservation information of the keyword information, that is, the information of the recording start time, the recording end time, and the recording channel, will be described with reference to the flow of FIG. The recording mode includes a disc recording mode using an optical disc in which a program reservation is written in advance in the keyword information 109 as shown in steps S30 to S35, and a user inputting a manual operation through the key input unit 43 shown in step S36. And a simple input mode using information recorded in the vertical retrace period of the Internet or video signal shown in step S37.

In the disk recording mode, step S30
When a disc is inserted into the apparatus as shown in FIG.
A search is made as shown in FIG. 31, and it is confirmed whether or not the program reservation information, that is, information on the recording start time, the recording end time, and the recording channel is recorded in the keyword information 109 as shown in step S32. If there is no reservation information, a manual mode in which the user's operation is waited is set as shown in step S33. If it is confirmed that the reservation information is present, the recording start time of the reservation information is compared with the current time as shown in step S34, and if a future time is recorded, as shown in step S35 The recording start time and the recording end time are input to the recording reservation memory unit 29, and the recording time is set.

In the manual mode, as shown in step S36, the user inputs information corresponding to each item by using the information input mode menu screen already described with reference to FIG.

In the simple input mode, when the user activates the modem and accesses a specific URL to specify the program information as shown in step S37, the information is written into the keyword information 109, the recording start time, the recording end time, and the like. Information on the time and the recording channel is set in the recording reservation memory. When using the program reservation information recorded during the vertical blanking period of the video signal, the program reservation information is displayed on a menu screen as shown in FIG. 23, and the favorite program among the displayed programs is displayed. Is specified, the information is written in the keyword information 109,
The information of the recording start time, the recording end time, and the recording channel is set in the recording reservation memory.

When the recording start time and the recording end time are specified in the above modes, the recording start time stored in the recording reservation memory unit 29 is compared with the current time obtained from the clock unit 38 as shown in step S38. If the two match, as shown in step S39, the recording reservation memory unit 2
The recording of the channel described in 9 starts. When the recording ends, the recording information, that is, the recording start time, the recording end time, and the information of the recording channel are recorded in the keyword information 109 as shown in step S40.

The recording start time is compared with the current time obtained from the timer 38. If the current time does not reach the recording start time, the modem 45 is periodically connected to the URL as shown in step S41. If the program information is set so that the program information of the URL is monitored, and if the program information is changed as shown in step S42, the changed recording start time and the changed The end time is stored in the memory unit 29 and the keyword information 1 is stored.
09, and the process returns to step S38 again. Similarly, when using the program reservation information recorded during the vertical blanking period of the video signal, the program information is monitored as shown in step S41.
When the program information is changed as shown in 42, the changed recording start time and changed recording end time are stored in the memory unit 29 and the keyword information 10 is changed.
9 is returned to step S38.

Next, a search based on the keyword items recorded in the keyword information 109 will be described with reference to FIGS.
This will be described with reference to FIG.

When the retrieval is started as shown in step S50 and the user requests the display of the menu as shown in step S51, the bitmap forming section 144 sets the bits of the items necessary for the menu in the bitmap forming section 144 as shown in step S52. A map is formed. Video processor 66
In, this data and reduced image data are combined,
As shown in step S54, D / A conversion is performed and the monitor unit 4
8 is output. Thereby, for example, search items as shown in FIG. 30 are displayed. At this time, when searching mainly for music, search items such as title, musician, lyricist, composer, conductor, recording start time, and last access time are displayed as an item group as shown in FIG. You. On the other hand, when searching for a movie,
As shown in FIG. 31, the title, director, performer, age, country of production, shooting location, recording start time, and last access time are displayed. When searching for a search item that is not included in the search items shown in FIG. 30 and FIG. 31, the user requests a search menu on which the desired search item is displayed on the next page. In parallel with the display of the search menu, the control information 78 is read from the optical disk 10 and stored in the memory unit 34 as shown in step S54.

Of the items in the search menu, the item that can best represent the content of the recorded video is defined as a main item group. The content shall be largely reflected. Main items include title, director, performer, recording start time,
The primary and secondary subordinate groups shall include other items.
The main item group is displayed on the first page of the menu. Also, the title is displayed on the first line of the menu, and usually the highlighted cursor is defaulted to the first item, the title item.

When the user selects an item to be searched from the search menu displayed on the monitor unit 48 as shown in step S56, the contents of the item selected by the user are stored in the keyword information of the control information stored in the memory unit 34. From 109, a search item related to the item is extracted.
For example, when the user selects a title item and the keyword codes 38 to 3F of the keyword information shown in FIG. 17, the corresponding description items of each keyword information are extracted from the memory unit 34, and the corresponding description items are bit- It is supplied to the map forming unit 144. In step S58, the extracted description items are converted into a bitmap in the bitmap forming unit 144, and the converted bitmap signal is D / A converted and output to the monitor unit 48 in step S59. Is done.
As a result, as shown in FIG. 32, each piece of keyword information (#
1)-Titles of keyword information (#n) are displayed. Here, in each of the keyword information (# 1) to the keyword information (# 4), a bus driver, a blade ranker, a domineer, and a locker are displayed as keywords of the title of the description.

At this time, when the cursor is moved to a certain title, the video associated with the title to which the cursor is moved is obtained by the video processor 66, and the image is converted into a reduced image, It is preferable that the image related to the title is displayed on the monitor 48 in a reduced size on the monitor 48 by being synthesized with the menu screen formed by the forming unit 144.

Here, if the user selects the performers, that is, the items of the leading actor and the leading actress of the character, and the keyword codes 6C and 6D of the keyword information shown in FIG. 17, the same procedure is performed as shown in FIG. Like 5
The name of the leading actor is displayed. Here, when a specific leading performer, for example, Harrison Fordour is further selected by the user, two titles starring Harrison Ford are displayed as shown in FIG.

If the user needs to further narrow down the search items using such a search menu, steps S56 to S59 are repeated. Step S
When the search by the user is completed as shown at 60, that is, when the title is determined, keyword information (#j) 109 relating to the specified title is specified, and a keyword is obtained from the keyword information (#j) 109, As shown in step S61, a bitmap relating to the keyword is formed in the same procedure, and step S6 is performed.
As shown in FIG. 3, this bitmap is D / A converted, and the keyword is displayed in the search result menu. When a PGC such as a specific title is selected, if a PGC number is written in the keyword information, the PG
If the PGC number corresponds to the C number (this PGC number is not directly recognized by the user) or the number of the keyword information, the PGC search pointer (#j) 114 is specified by the number, PGC information (#j) is obtained by the PGC search pointer (#j) 114, and PGCs are reproduced one after another. That is, step S64
And the video object 82 selected and associated with the title is reproduced. When the reproduction is started, this search is ended as shown in step S65.

The group to which the above item belongs can be freely changed by the user, and the number of times the item has been searched for is stored in the environment information storage unit 47 every time the item is used for search reproduction. Thus, the group to which the item belongs can be changed according to the use frequency. For example, FIG.
As shown in, if you want to use this recording and playback device for music purposes, musicians, composers,
The term "lyricist" is often used for search. At this time, the main item group is changed to title, musician, composer, lyricist, and recording start time, and this is used for the initial screen of the search menu.

Further, the operation of PGC reproduction will be described according to the operation flow shown in FIG. 35 and FIG. Here, in the normal reproduction operation, the title is determined in the
It starts when the AY key is pressed. If the title number is not specified in advance in the above-described procedure, the reproduction of the file of title 1 corresponding to the default, that is, the video object (VOB) is started.

When step S70 shown in FIG. 35 is started, first, as shown in step 72, control information (control Info.) 78 is read. That is,
The PGC information 116 shown in FIG. 10 in the control information 78 is read into the MPU 30. As shown in step 74, the title is determined by the user in the process described above, and the PLAY is determined.
When a title is designated by pressing a key, or when the default title 1 is selected, the information of the target title is fetched from the title search point of the PGC information table 110 according to the designated title number, and the start address of the VOB is read. Is taken out. That is, the PGC number and cell number to be reproduced are determined as shown in step S76. Further, each decoder is initialized according to the contents written in the reproduction management table of the control information as shown in step S78. As shown in step 78, a cell to be reproduced is searched according to the contents of the PGC information 116, and a necessary preprocessing command is executed as shown in step S80. This preprocessing command is described in a command table provided as necessary in the PGC information table 110, and is extracted as necessary. afterwards,
The cell is reproduced as shown in step S81. If the reproduced cell is not the last cell as shown in step S82, the next cell number is counted up as shown in step S84, and the routine goes to step S82.

In step S82, the process waits until the reproduction of the cell is completed. After the reproduction is completed, as shown in step S86, the still is performed for the still time of the cell. Here, if the still time is 0, the process directly proceeds to the next step S88. Thereafter, a post-processing command is executed in step S88. The post-processing command is described in a command table provided as necessary in the PGC information table 110, similarly to the pre-processing command, and is extracted as necessary.

In step S90, if the PGC to be reproduced next is not the end of reproduction, but the next PGC is to be reproduced,
The GC number is determined, and the routine goes to Step S80. If it is determined in step S90 that the reproduction has ended, a process associated with the end of reproduction is performed as shown in step S98, and the reproduction process is ended as shown in step S99.

Here, steps S81 and S8 in FIG.
The operation of the cell reproduction shown in FIG. 2 will be described according to the operation flow shown in FIG. When the process at the time of cell reproduction shown in step S100 is started, it is checked whether or not VOBUs are continuous as shown in step S102, and if so, the process proceeds to step S108. If the cells are not consecutive in step S102, the PGC information 116
, The reproduction start address is determined, and the drive unit 3
2, the reproduction start address is set together with the data read command. Control information 78, that is, step S108
As shown in (1), the cell reproduction start time (C_PBTM) in the cell reproduction information 120 is taken into the MPU 36 and stored in the RAM. This cell reproduction start time (C_PBTM)
Is displayed on the display device, and the reproduction of the cell is continued based on the reproduction time. If the stop key is pressed during the reproduction of the cell as shown in step S110, the flow shifts to step 117 to terminate the cell reproduction based on the input of the stop of reproduction.

If it is determined in step S110 that the stop key has not been pressed during reproduction of the cell, step S102 is performed.
In, it is determined whether or not the cell corresponds to the last cell, and if not, the process returns to step S110. If it is the last cell, it waits for the reproduction of the last VOBU in that cell to end, as shown in step S104. When the playback of the last VOBU ends,
As shown in step S106, the still cell is still for the still time of the cell, and it is confirmed in the next step S82 whether or not the cell is the last cell. If the cell is not the last cell, the process returns to step S102 again. Here, when the still time is 0, the process directly proceeds to the next step S102. If it is the last cell in step 102, the process moves to step S116 shown in FIG. After the still processing is performed for a predetermined time in step 116, the process returns to step 82 shown in FIG. 35 where the cell is confirmed as the last cell. If it is not the last cell, the process returns to step 100 again.

[0133]

As described above, according to the recording / reproducing apparatus and the recordable optical disk of the present invention, a program recorded from a TV or the like or information of a video taken by a camcorder is recorded on a recording medium, and is recorded on a recording medium. At the time of reproduction, it can be provided to the user as a menu for search reproduction. Using this information, the user can search for a desired program and can easily reproduce it. Therefore, an extremely user-friendly environment can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating the structure of a recordable / reproducible optical disk.

FIG. 2 is a view for explaining a correspondence relationship between a data recording area of the optical disc of FIG. 1 and a recording track of data recorded thereon.

FIG. 3 is an exemplary view for explaining a directory structure of an information area recorded on the optical disc of FIGS. 1 and 2;

FIG. 4 is a table showing contents of a primary volume descriptor stored in a volume and a file management area shown in FIG. 3;

FIG. 5 is a table showing contents of directory records stored in the volume and file management area shown in FIG. 3;

FIG. 6 is a view showing a data structure of the video object set shown in FIG. 3;

FIG. 7 is a view showing the structure of the data pack shown in FIG. 6;

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

9 is a reproduction management table (PLY_MA) shown in FIG. 8;
The figure which shows the content of T).

FIG. 10 is a view showing a data structure of a PGC information table shown in FIG. 8;

FIG. 11 is a view for explaining the concept of PGC in the PGC information table shown in FIG. 10;

FIG. 12 is a view showing contents of PGC information management information shown in FIG. 10;

FIG. 13 is a view showing the contents of PGC general information shown in FIG. 10;

FIG. 14 is a view showing the contents of the cell reproduction information shown in FIG. 8;

FIG. 15 is a diagram showing the contents of a record management table shown in FIG. 8;

FIG. 16 is a diagram showing contents of a recording information table shown in FIG. 8;

FIG. 17 is a table showing classifications of the keyword information shown in FIG. 8 together with keyword codes.

18 is a table showing classifications of the keyword information similarly shown in FIG. 8 together with keyword codes.

FIG. 19 is a table showing classifications of the keyword information shown in FIG. 8 together with keyword codes.

20 is a block diagram illustrating a configuration of a DVD video recorder that records and reproduces digital moving image information on the disc of FIG. 1 using information having a structure as described with reference to FIGS.

FIG. 21 is a flowchart showing an outline of recording and reproducing operations in the DVD video recorder shown in FIG. 20;

FIG. 22 is a flowchart showing an operation of program reservation recording in the DVD video recorder shown in FIG. 20;

FIG. 23 is a plan view showing an example of an input menu screen for inputting keyword information.

FIG. 24 is an exemplary plan view showing an example of the key input unit shown in FIG. 20;

FIG. 25 is a table showing a recording example of the keyword information shown in FIG. 8;

FIG. 26 is a table showing a recording example of keyword information shown in FIG. 8;

FIG. 27 is a flowchart showing recording processing in various reserved recording modes.

FIG. 28 is a flowchart showing a search operation for selecting a title using the keyword information shown in FIG. 8;

FIG. 29 is a flowchart showing a search operation for selecting a title using the keyword information shown in FIG. 8;

30 is a plan view showing an example of a search screen used for the search operation shown in FIG.

FIG. 31 is an exemplary plan view showing another example of the search screen used for the search operation shown in FIG. 29;

32 is a plan view showing still another example of the search screen used for the search operation shown in FIG. 29.

FIG. 33 is a plan view showing still another example of the search screen used for the search operation shown in FIG. 29;

34 is a plan view showing another example of the search screen used for the search operation shown in FIG. 29.

FIG. 35 is a flowchart showing a normal reproduction operation in the DVD video recorder shown in FIG. 20;

FIG. 36 is a flowchart showing processing during cell reproduction during a normal reproduction operation in the DVD video recorder shown in FIG. 20;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Recordable / playable optical disk 11 ... Cartridge 14 ... Transparent substrate (polycarbonate) 16 ... Light reflective layer 17 ... Recording layer 19 ... Reading surface 20 ... Adhesive layer 22 ... Center hole 24 ... Clamping area 25 ... Information area 26 ... Read Out area 27 Lead-in area 29 Recording reservation memory 28 Data recording area 30 Microcomputer block (MPU / ROM)
/ RAM) 32 ... Disk drive 34 ... Memory 36 ... MPU 38 ... System time counter STC 42 ... AV input unit 44 ... TV tuner (terrestrial / satellite broadcast tuner) 45 ... Modem unit 46 ... AV output unit 47 ... Environment information storage Unit 48 Monitor unit 50 Encoder unit 52 A / DC 53 Video encoder 54 Audio encoder 55 Sub-picture encoder 56 Formatter 57 Buffer memory 60 Decoder unit 61 Data processor unit 62 Separator 63 Memory 64 ... video decoder 65 ... sub-picture decoder 66 ... video processor 67 ... video D / A 68 ... audio decoder 69 ... audio D / A 70 ... volume / file structure area 72 ... data area 76 ... audio / video data area 78 ... control information 80 Video object set 94 Cell 96 Video object unit 102 Playback control information 104 Recording control information 110 PGC information table 109 Keyword information 112 PGC information management information 116 PGC information 119 Keyword search pointer 120 Cell Reproduction information 122: Reproduction management table 144: Bitmap forming unit

Claims (17)

[Claims] 1. A recording / reproducing apparatus for recording video program data or audio program data on a repetitively recordable and erasable optical disk and reproducing the data, input means for inputting search information relating to the program, Registering means for registering search information relating to the read program on the optical disc; reading means for reading the registered search information; storage means for temporarily storing the read search information; and referring to the stored search information. To play the recorded data,
Alternatively, a recording / reproducing apparatus comprising: reproducing / recording executing means for newly recording data. 2. The search information includes a recording start time, a recording end time, and recording reservation information relating to a program, and the reproduction / recording execution means records the program data on an optical disk according to the recording reservation information. 2. The recording / reproducing apparatus according to claim 1, further comprising means. 3. The recording / reproducing apparatus according to claim 1, further comprising image signal generating means for generating an input screen signal corresponding to an input menu screen for inputting search information. 4. The recording / reproducing apparatus according to claim 1, further comprising image signal generating means for generating a search screen signal corresponding to a search menu screen for displaying search information. 5. The recording / reproducing apparatus according to claim 3, further comprising display means for displaying a menu screen in response to the input screen signal or the search screen signal. 6. The image processing apparatus according to claim 1, wherein said reading means further comprises an image signal generating means for extracting a plurality of video programs recorded on said optical disc as a reference video signal and generating said reference video signal as a search screen signal. 2. The recording / reproducing apparatus according to claim 1, wherein: 7. The recording / reproducing apparatus according to claim 6, further comprising display means for receiving a search screen signal and displaying a menu screen on which the reference video is displayed. 8. The recording apparatus according to claim 7, wherein the menu screen is divided into an area for displaying the reference image and an area for displaying a menu as a selection item, and the reference image is displayed in a reduced size. Playback device. 9. The search information includes a title, a director, a performer, an age, a production country, a shooting place, a musician, a lyricist, a composer, a conductor, a recording start time, and a last access capable of expressing the content of the recorded video. 2. The recording / reproducing apparatus according to claim 1, comprising at least one item selected from a display item group composed of time. 10. The recording / reproducing apparatus according to claim 1, wherein said search information is composed of a main item group capable of expressing the contents of the recorded video most, and a subordinate group to which subordinate items belong. . 11. The recording / reproducing apparatus according to claim 10, wherein the main item group includes a title, a director, a performer, and a recording start time, and the subordinate group includes other items. 12. The apparatus according to claim 10, further comprising image signal generating means for generating a search screen signal corresponding to a search menu screen of said main item group for displaying search information of said main item group. Recording and playback device. 13. The recording / reproducing apparatus according to claim 10, further comprising an obtaining means for obtaining search information from outside. 14. A data area capable of recording video or audio program data, wherein the data area stores a control information area in which control information relating to the program data to be recorded is to be recorded and encoded program data. The control information area includes a reproduction information area in which information relating to reproduction control of the program data is recorded and a search information area in which search information for searching for the program data is recorded. An optical disk, wherein the search information area is defined as an area in which items belonging to any of the title information, character information, and recording information of the program data can be recorded together with a reference code. 15. The search information area includes a title, a director, a performer, an age, a production country, a shooting place, a musician, a lyricist, a composer, a conductor, a recording start time, and a final time which can express the contents of the recorded video. 2. An area in which at least one or more items selected from a display item group composed of access times can be recorded.
4 optical disk. 16. Items to be recorded in the search information area are classified into a main item group that can best represent the content of the recorded video and a subordinate group to which subordinate items belong. The optical disc according to claim 14. 17. The optical disk according to claim 16, wherein the main item group includes a title, a director, a performer, and a recording start time, and the subordinate group includes other items.