JPH07176053A - Optical disk and optical disk device - Google Patents

Abstract

PURPOSE:To perform reproduction in a short time by recording absolute time, etc., of each subsequence in a program sequence in a read-in area, storing it in a memory at the time of loading the disk and performing a track jump of a pickup in referring to at the time of access designation. CONSTITUTION:A title of each sequence and a title of each subsequence of an optical disk 10 presently under loading are displayed on a display panel 110 provided in a position to be seen by the user, and if there is a sequence or a subsequence presently under reproduction, this is displayed at the same time, and the device is brought under the state of acceptance of an access command. Then, upon receipt of an access command from the user, an event of starting access is generated, and a desired sequence number and a desired subsequence number on the disk 10 are referred to the memory 50 stored with these management data to obtain a target absolute time, P-time. Afterward, a track jump is performed, and the absolute time in the data area is read, while the target absolute time is read, and upon coincidence of them in comparison, contents of the disk 10 are reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc in which at least one set of digital video and audio corresponding to a series of program sequences is recorded, and an optical disc which enables easy cueing of each program and random access. The present invention relates to an optical disk device.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional optical disk device.
FIG. 6 is a diagram showing a structure of management data on a disc, and FIG. 6 is a diagram showing a procedure of an access method of an optical disc written by the conventional management data structure shown in FIG. The operation of the conventional access method of the optical disk device will be described below with reference to FIGS.

In FIG. 5, FIG. 5 (a) shows a management data structure in a lead-in area (disc playback start position) of a conventional optical disc represented by a compact disc, and FIG. 5 (b) shows a compact disc. 2 is a management data structure in a data area (area where a program sequence is recorded on the disk) of the conventional optical disk. As shown in FIG. 5 (a), in the lead-in area of the conventional optical disc, a sequence number (SNO) indicating a program number
And the number that specifies the program sequence in the data area on the disc (POINT) and the elapsed time in the sequence (TIME)
And the absolute time (PTIME) of the start of the sequence pointed to by POINT is written.

Further, as shown in FIG. 5B, in the data area of the conventional optical disc, a sequence number (SNO) indicating a program number, a number (X) indicating an index in the sequence, and a sequence number The elapsed time (TIME) and the absolute time (ATIME) on the disk are written. In the conventional optical disc having the management data structure as described above, the access method will be described below with reference to FIG.

First, when the reproduction of the optical disc is started, the management data of the lead-in area is stored in the memory (FIG. 6).
By (a)), each sequence number in the disc and the absolute time when each sequence starts can be referred to at any time. Next, when the user specifies the program sequence to be played back, an access start event occurs (Fig. 6 (b)) and the number corresponding to the desired program sequence is generated.
(POINT) is specified. Further, the absolute time (PTIME) at which the sequence indicated by POINT starts is obtained as the target absolute time (FIG. 6 (c)).

After this, a track jump is performed (see FIG. 6).
(d)), the absolute time in the data area is read and compared with the target absolute time (Fig. 6 (e)), and if they match, playback of the disc contents is started (Fig. 6 (f)), If they do not match, repeat the track jump and skip to the target absolute time.

In the conventional optical disk device having the above-described structure, the absolute time at which each program sequence written on the optical disk starts is written in the lead-in area of the optical disk, and each program sequence is requested according to the user's request. The playback is started by immediately moving the pickup to the position where the recording is started, which is generally used in a conventional optical disk device represented by a compact disk.

[0008]

However, in such a conventional configuration, it is only possible to cue in sequence units and the reproduction time of one sequence is at most about several minutes like an audio compact disc. However, when a video such as a movie is recorded, the reproduction time of one sequence reaches about 2 hours, and after the user watches a particular program sequence, for example, the first half, another opportunity. In addition, when trying to watch the latter half of the same program sequence, the program sequence must be played back from the beginning, and there is a problem that it takes time to find the beginning of the sequence.

Further, in such a configuration, since the program sequence is designated only by the number, the access destination is designated by the sequence number instead of the title of the program. When the user designates the program, However, there is a problem in that it takes time to specify an access destination because a process of manually associating a title of a program to be reproduced with a sequence number and then specifying the sequence number is involved.

The present invention solves the above-mentioned problems, and provides an optical disc and an optical disc device that can perform cueing in a program sequence at high speed as well as cueing in program sequence units. An object of the present invention is to provide an optical disc and an optical disc device, which can be designated by a title instead of a number to find a subsequence in a sequence and which has good operability.

[0011]

[Means for Solving the Problems] To achieve the above object,
In the optical disc device of the present invention, the absolute time when each program sequence starts in the lead-in area and the development of a scene corresponding to a definite time interval in each program sequence or a chapter in each program sequence as a sub sequence, The absolute time to start the sequence and each sub-sequence, the title of each sequence and each sub-sequence is written, and the management information on the absolute time of the lead-in area and the title of the program is stored in the buffer in advance when the disc playback is started. In addition, it is characterized in that it can be referred to as needed.

[0012]

According to the present invention, the absolute time when each program sequence starts and the absolute time corresponding to the sub-sequence in each program sequence and the title of each sequence and each sub-sequence are written in the lead-in area according to the above-mentioned configuration. , It is stored in a buffer at the start of disc playback, and if there is an access request, the contents of the buffer are referenced to perform a track jump, and the user's access destination can be specified by title. Even if the user's cue request is in the middle of the program sequence, it is possible to easily and quickly move to the target track and start reproduction.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk and an optical disk device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a structure of management data on the disc in the optical disc of the present embodiment, and FIG. 2 is a diagram showing a procedure of an access method of the optical disc written with the management data structure of the present embodiment shown in FIG. FIG. 3 is an explanatory diagram showing a method of accessing the optical disc of the present invention shown in FIG. The operation of the optical disc and the optical disc apparatus of this embodiment will be described below with reference to FIGS. 1, 2, and 3.

In FIG. 1, FIG. 1A shows the management data structure in the lead-in area (reproduction start position of the disk) of the optical disk of this embodiment, and FIG. 1B shows the data area of the optical disk of this embodiment. It is a management data structure in (the area where the program sequence is recorded on the disc).

As shown in FIG. 1A, in the lead-in area of the optical disc of the present embodiment, a sequence number (SNO) indicating a program sequence number and a number designating a program sequence in the data area on the optical disc. (POINT) and the number that specifies the sub sequence in the program sequence (SPOINT)
, A code (D) indicating the time interval between subsequences, and P
The sequence title (PNAME) indicated by OINT, the subsequence title (SPNAME) indicated by SPOINT, the elapsed time (TIME) in the sequence, and the absolute time (PTIME) of the subsequence indicated by POINT and SPOINT are It has been written.

Further, as shown in FIG. 1 (b), in the data area of the optical disc of the present embodiment, a sequence number (SNO) indicating a program sequence number and a sub-sequence number (SNO) corresponding to a chapter in the program sequence ( SSNO), number (X) that displays the index in each sequence or each subsequence, reserved area (RES), elapsed time in sequence (TIME), absolute time on disk (ATIME), etc. Is written.

In the optical disc of the present embodiment having the management data structure as described above, an access method will be described below with reference to FIGS. 2 and 3.

First, when the reproduction of the optical disc is started, the management data of the lead-in area (FIG. 3 (a)) is stored in the memory (FIG. 2 (a)), so that each sequence number in the disc (FIG. 3 (b)) is stored. )) And each sub-sequence number (Fig. 3 (c)) and the absolute time when each sequence and sub-sequence starts (Fig. 3 (d)). Furthermore, the title (PNAME) of each sequence and the title (SPNAME) of each sub-sequence. Can be referred to anytime.

Next, the title of each sequence and the title of each sub-sequence of the currently loaded optical disc are displayed on a display panel provided at a position visible to the user, and if there is a sequence or sub-sequence currently being reproduced. Displayed at the same time (Fig. 2 (b)), access command acceptance status (Fig. 2
Enter (c)). Receive access instructions from users (Fig. 2
(d)) and an access start event occurs, and the desired sequence number and the desired subsequence number on the disk are referred to by referring to the memory storing the management data (see FIG. 2).
(e)) Obtain the target absolute time (PTIME) (Fig. 2 (f)).

After that, a track jump (FIG. 2 (g)) is performed, the absolute time in the data area is read, and the target absolute time is compared (FIG. 2 (h)). Playback of the contents (Fig. 2 (i)) is started, and if they do not match, the track jump is repeated and the target absolute time is skipped.

FIG. 4 is a block diagram of an optical disk device according to an embodiment of the present invention. A signal reproduced from the optical disk 10 is amplified by an amplifier 20 and separated into binary digital data by a data separator 40 composed of a PLL or the like. During reproduction of the data area of the optical disk, the system control circuit 60 causes the binary digital data to be a video decoder (V. Decoder) 70 and an audio decoder (A. Decoder).
After being sent to 80 and decoded respectively, the video is displayed on the monitor 9
The sound from 0 is output from the speaker 100.

During reproduction of the lead-in area of the optical disk,
The memory 50 stores the management data of the program sequence shown in FIG. Further, the display panel 110 also displays the program content of the disc currently mounted and the program content being reproduced if it is currently being reproduced. When the user specifies a cue, the cue specifying circuit 120 receives a command, and the system control circuit 60 receives the program sequence number of the access destination and the subsequence number in the program sequence.
Sent to. The system control circuit 60 obtains the specified absolute time up to the sub-sequence of the access destination by referring to the management data of the disk contents written in the memory 50 in advance. The track position control circuit 30 is the system control circuit 6
The required number of track jumps is calculated based on the absolute time from 0, and a predetermined amount of track jumps are performed.

Therefore, in the conventional optical disc and the optical disc device, the cue can be specified only in the sequence unit of the program, but in the optical disc and the optical disc device according to the embodiment of the present invention, the sub sequence unit in the program sequence can be designated. Access can be specified easily, and high-speed cueing is possible.

In this embodiment, the management of the program sequence is managed in two steps of the sequence number and the sub-sequence number, but the program sequence is managed in a finer hierarchical structure of three steps or more, It is possible to easily analogize an optical disc and an optical disc device that are fine and have good operability, and this is within the scope of the present invention.

[0025]

As described above, according to the present invention, not only the absolute time of each program sequence but also the absolute time of each sub-sequence in each program sequence and each sequence and each sub-sequence is recorded in the lead-in area of the optical disc. The title is also recorded, and it is stored in the memory when the disc is loaded and referred to when access is specified to control the track jump of the pickup, so the access destination is specified in the middle of a program sequence with a long playback time. However, it is possible to immediately refer to the memory in which the management data of the lead-in area is stored and move to the target track in a short time to start the reproduction.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a management data structure of an optical disc of the present invention.

FIG. 2 is a flowchart showing an embodiment of an optical disc access method according to the present invention.

3 is a diagram showing the contents of a management data structure of the optical disc shown in FIG.

FIG. 4 is a block diagram showing a configuration of an optical disc device according to an embodiment of the present invention.

FIG. 5 is a diagram showing a management data structure of a conventional optical disc represented by a compact disc.

FIG. 6 is a flowchart showing a conventional optical disc access method.

[Explanation of symbols]

 10 optical disk 20 amplifier 30 track position control circuit 40 data separator 50 memory 60 system control circuit 70 video decoder 80 audio decoder 90 monitor 100 speaker 110 display panel 120 cue designation circuit

Claims (3)

[Claims] 1. An optical disc in which at least one set of digital video and audio corresponding to a series of program sequences is recorded, and the title and sequence number of each program sequence and the program within the program at the reproduction start position of the optical disc. The title indicating each chapter, the subsequence number corresponding to each chapter, and the absolute address on the disc corresponding to the sequence number and the subsequence number are written, and the data frame in each program sequence is written to the absolute disc in the disc. An optical disc in which a sequence number and a sub-sequence number are written together with an address. 2. An optical disc on which at least one set of digital video and audio corresponding to a series of program sequences is recorded, and management information indicating an absolute address corresponding to a sequence number of each program and a subsequence number in each program. An optical disc device comprising: storage means for storing the optical disc and track jump control means for moving an optical pickup to a desired track on the optical disc. 3. An optical disc in which at least one set of digital video and audio corresponding to a series of program sequences is recorded, and the title of the program recorded on the optical disc and the title of each chapter in the program are displayed. And a second display means for displaying the title of the program being reproduced and the title of the chapter in the program while the optical disk is being reproduced.