JP2000057751A - Optical disk, optical disk apparatus and optical disk reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk and an optical disk apparatus which can start the reproducing operation from a preceding reproduction interrupting point even if a disk is replaced. SOLUTION: An optical disk has a user definition position information table to which a user registers the position information to start reproducing operation and a reproduction end position information table to which the information of the position at which the apparatus has stopped the reproducing operation. The reproduction end position information table is formed of a plurality of reproduction end position information pieces indicating the reproduction end position and a next pointer information indicating the recording position of the reproduction end position information to be recorded next.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk capable of accessing an arbitrary position. More specifically, the present invention relates to address information at the time of stopping reproduction of an optical disk device or address information designated by a user. An optical disc that can be registered in a predetermined area of
The present invention also relates to an optical disk device using the optical disk and an optical disk reproducing method.

[0002]

2. Description of the Related Art One of the functions of a video reproducing apparatus is a function called a bookmark. JP-A-6-13140
Japanese Patent Application Laid-Open Publication No. 1 (1999) describes a bookmark information adding function using an optical disk as a recording medium, and Japanese Unexamined Patent Application Publication No. 9-167472 describes a bookmark adding method for a CD-ROM. In this function, the apparatus stores the position where the user has finished (stopped) reproducing the video by some means, and then starts the reproduction from the ending position when the reproduction is resumed. Thus, it functions like a so-called bookmark. Things.
Some MDs (Mini-Discs) that record and reproduce audio have this function. In addition, there is a Video-CD as a device that handles video. FIG. 10 is a block circuit diagram showing an example of a configuration required to realize a bookmark function of a video reproducing apparatus using a conventional optical disc device.

In the figure, 101 is an optical disk as a recording medium, 2 is a disk motor for rotating the optical disk 1, 3 is a motor control means for controlling the drive rotation of the disk motor 2, and 102 contains data, addresses and the like from the optical disk 101. An information reproducing head for reproducing an information signal; an address decoding means for extracting a sector address signal from a signal reproduced by the information reproducing head and outputting an address decoding signal obtained by converting the extracted sector address signal into a sector address value; Reference numeral 104 denotes a reproducing means for reading and demodulating a reproduction signal from the information reproducing head 102, 104 a video signal decoding means for decoding a video signal and sending it to an output user interface unit, and 105 a buffer memory for storing a reproduction start position address. The buffer memory 105 may be of any type as long as it can store the reproduction start position address, but is a non-volatile device such that the stored information is not erased even when the apparatus is turned off. It is desirable. 106, an input user interface unit for transmitting a reproduction / stop request from the user to the apparatus;
Is an output user interface unit for displaying a video signal to a user, and 108 is a controller for controlling each of the above means.

The operation of the above device will be described. When a stop request is made by the user during reproduction of the optical disk 101, a stop request signal is sent from the input interface unit 106 to the controller 108. Upon receiving the signal, the controller obtains the address of the position on the disk currently being reproduced through the address decoding means 5 and registers the obtained address in the buffer memory 105. Then, when the user orders playback again through the input interface,
The address registered in the buffer memory 105 is read by the controller, and based on this address, the information reproducing head 102 is moved to a position corresponding to the address, and the reproduction is restarted. Note that the buffer memory 105
Although it is a non-volatile device so that the registered address information is not lost even when the power of the apparatus is turned off, the address information stored in the buffer memory 105 is changed when the optical disk is changed to another one. Since it has no meaning, the address information is deleted when the exchange is detected. By adopting such a method, in the conventional apparatus, the user can easily restart the reproduction from the end position without memorizing the position where the reproduction has ended.

[0005]

Since the conventional optical disk apparatus is configured as described above, when the optical disk is replaced, the information of the reproduction start position stored in the buffer memory is replaced with the information of the optical disk before the replacement. Since the information is the reproduction start position information, it becomes invalid and has no meaning and is deleted. Therefore, when the optical disk is replaced and a new disk is taken into the apparatus, the previous reproduction end point of the disk cannot be known, and there is no other way than to reproduce from the initial position.

[0006] The playback end point stored in the buffer memory can be used even when the power of the apparatus is turned off. Since it is necessary to provide such a mechanism in the optical disc device, the cost of the device is increased.

The present invention has been made to solve such a problem. Even when an optical disk is exchanged, it is possible to detect a previous reproduction end point of the optical disk and to easily detect the reproduction end point from that position. It is an object of the present invention to obtain an optical disk device capable of restarting reproduction.

It is another object of the present invention to provide an optical disk capable of resuming reproduction from the previous reproduction end point of the optical disk even if an arbitrary optical disk is taken to another device.

[0009] Further, an optical disk which allows a user to register an arbitrary position desired by the user in addition to the previous reproduction end point as the reproduction start point, and the reproduction end point or the user's desired position can be easily obtained by using this optical disk. It is an object of the present invention to obtain an optical disk device capable of reproducing data from a desired position.

An optical disk and an optical disk in which the registered reproduction end point is automatically updated from the oldest one without deleting by the user so that the information of the reproduction end point does not increase more than necessary. The aim is to obtain a device.

[0011]

According to the present invention, there is provided an optical disk in which a user-defined position information table in which position information desired by a user to start reproduction is registered, and information on a position at which the apparatus stops reproduction are recorded. The reproduction end position information table includes a plurality of pieces of address information indicating a reproduction end position and a next pointer indicating a position where the next address information to be recorded is to be recorded. Information is to be registered. Also, in the optical disc according to the third aspect, the user-defined position information table or the reproduction end position information table relates to the state of the apparatus when the optical disk apparatus reproducing the optical disk together with the address information reproduces the video information at the address information position. Information can also be registered.

[0012] According to a fourth aspect of the present invention, there is provided an optical disk reproducing method.
The pointer position is moved from the beginning to the end of the table every time the address of the reproduction end position is recorded, and when the table is full, the address is returned to the beginning and the address is updated. Thus, the address information of the latest reproduction end position is automatically registered in the table.

According to a fifth aspect of the present invention, there is provided an optical disc reproducing method, comprising:
2. The method for reproducing an optical disk according to claim 1, wherein video information corresponding to address information registered in two tables, a user-defined position information table and a reproduction end position information table, is displayed on a display device in the order of reproduction of the optical disk. Is what you do.

According to a sixth aspect of the present invention, there is provided an optical disk device, comprising: an address detection unit for detecting a reproduction position; a buffer memory for storing information of a user-defined position information table; and a buffer for storing reproduction end position information. Memory and
A video codec for decoding and decoding the video signal; a control unit for controlling the drive of the optical disc, recording the position information stored in the two buffer memories on the optical disc in a timely manner, and adding and correcting the position information; An input interface unit that informs the control unit that the user wants to start playback and that the user has stopped playback, and an output user interface unit that communicates to the user the position information registered in the two tables and the video information corresponding thereto. It consists of. Further, the optical disk according to claim 7 is an optical disk capable of accessing an arbitrary position,
In an optical disc on which encoded video information is recorded together with address information indicating a physical position on the optical disc, in the address information, address information specified by a user or an address related to a specific position in the recorded video information. An area in which information can be registered in an updatable manner is provided. Further, in the optical disk according to the eighth aspect, the specific position according to the seventh aspect is a scene change position of the video information to be recorded.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a view showing an example of a reproduction end position information table in which a plurality of reproduction interruption positions (reproduction end positions) provided on the optical disc according to the present invention are registered.
As shown in the figure, the table includes a reproduction end position information storage unit capable of storing n (n is a natural number) reproduction end position information and a next pointer information storage unit storing one piece of next pointer information. Is done. Each of the reproduction end position information storage units stores, as reproduction end position information, address information indicating a position on the disc where reproduction has been stopped (stopped) by the user. This address information may be in the form of the playback time of the corresponding video. The next pointer information storage unit stores the position (address) of the reproduction end position information storage unit where the next address information is recorded as the next pointer information. The next pointer information is updated so as to indicate an address at which recording of the next reproduction end position information should be started each time the reproduction end position information is recorded. Then, the process returns to the first address of the storage unit when the reproduction end position information storage unit is full. That is, the reproduction end position information is stored in the reproduction end position information storage in the same format as the ring buffer. As a result, a state in which the latest n pieces of reproduction end position information are always registered in the recorded reproduction end position information storage unit.

FIG. 2 shows an example of the size of each area of the reproduction end position information table of the optical disk according to the present invention and the addresses to be allocated. This optical disk is a medium in which a specific sector can be represented by 3 bytes, and there are four (n = 4) reproduction end position information storage sections. Also, the next pointer information storage unit stores the address 0x100, and the reproduction end position information tables # 1 to # 4 store 0x103, 0.
x106, 0x109, 0x10a, and 0x10c. FIG. 3 is a diagram showing a state in which the reproduction end position information is sequentially registered in the reproduction end position information storage unit. In this figure, 0x1000, 0x2000, 0x3000,...
It is assumed that they are registered in the order of x6000. In the state where nothing is registered ((a) in the figure), 0x which is the start address of the reproduction end position information is used as the next pointer information.
103 is registered. 0x1 as the first registration information
000, 0x10 indicated by the next pointer information
0x1000 is registered from address 3 to address 0x105.
Then, the next pointer information is updated to 0x106, which is the address of the second reproduction end position information storage unit ((b) in the figure). By performing the same processing as above, 0x2000
((C) in the figure) and 0x3000 ((d) in the figure).
When registering 0x4000, it is registered at address 0x10c, which is the address of the last playback end position information storage unit. Then, the next pointer information returns to 0x103 which is the address of the first reproduction end position information storage section ((e) in the figure). Thereafter, the reproduction end position information is sequentially updated ((f), (g) in the figure).

FIG. 4 is a diagram showing a configuration example of a user-defined position information table provided on the optical disc of the present invention.
The optical disc of the present invention has a user-defined position information table as shown in FIG. This user-defined location information table contains m
(M is a natural number) of user-defined position information, each of which is information relating to a reproduction start position on a disc specified by the user himself,
Usually, disk address information is used. In the above-described reproduction end position information table, when n or more pieces of information are to be recorded, the information is recorded without limitation by overwriting and updating the oldest information in order from the oldest information. This is because the position at which the information is interrupted is usually set for the temporary convenience of the user, and the older information is considered to be less important. On the other hand, if the user-defined position information table records a maximum of m pieces of information,
In principle, no further information is set to be recorded. This is because the user registers as a position having a special meaning in relation to the information recorded on the optical disc, and whether the information has been recorded in the past or recently recorded is not a big problem in importance. .

FIG. 5 is a diagram showing an example of a specific configuration of an optical disk device using the optical disk of the present invention. In the figure, 1 is an optical disk as a recording medium, 2 is a disk motor for rotating the optical disk 1, 3 is a motor control means for controlling the drive rotation of the disk motor 2, 4 is information such as video data recorded on the optical disk 1. Or, an information recording / reproducing head for reproducing information such as recorded data and addresses, and an address decoder 5 for reading a sector address signal from the information recording / reproducing head 4 and outputting an address decoding signal obtained by converting the sector address signal into a sector address value. A recording / reproducing means for modulating the recording data during recording and outputting it to the information recording / reproducing head 4 during recording, and for reproducing and reading out a reproduction signal from the information recording / reproducing head 4 for reproduction; Output to the recording / reproducing means 6 or decode video information from the recording / reproducing means 6 to output The video signal encoding / decoding means 8 for outputting to the interface section 10 can temporarily store the information of the reproduction end position information table and the user-defined position information table read from the optical disk when recording or reproducing the optical disk 1. The buffer memory has a capacity for registering reproduction end position information and user-defined position information. Reference numeral 9 denotes an input user interface unit for notifying the apparatus of the start and end of recording and reproduction from a user and an arbitrary reproduction start position, 10 an output user interface unit for displaying a video signal to the user, and 11 a controller for controlling each unit of the apparatus. is there. Note that the reproduction end position information is the position where the reproduction was interrupted and is automatically registered by the device. On the other hand, the user-defined position information is an address input by the user himself, so that During playback or recording, through an input interface such as a remote controller.

The operation of the above device will be described. When the optical disk 1 is inserted into the apparatus, the apparatus reads the reproduction end position information table and the user-defined position information table recorded in a predetermined area on the optical disk 1. That is, the controller 11 reads out the information of the address position where the reproduction end position information table and the user-defined position information table are recorded through the recording / reproduction means 6. The obtained information is stored in the buffer memory 8. The subsequent operations on the two tables are performed using the data in the buffer memory 8. During operation of the apparatus, new reproduction end position information or user-defined position information is registered and updated in the buffer memory 8. In this case, consistency with the position information registered on the optical disk is ensured. Therefore, in the present apparatus, the table information on the disk 1 is updated by the information recorded in the buffer memory 8 at a predetermined time interval and at a predetermined timing such as immediately before the user turns off the power of the apparatus. I have. By doing so, it is possible to seek, read, and read the disc 1 as compared with the case where the disc 1 is updated every time the reproduction end position information or the user-defined position information is newly registered or updated.
The occurrence of write processing can be prevented, and the processing load on the device can be reduced.

Next, the operation of specifying the reproduction start position using the two tables recorded in the buffer memory 8 will be described. When the playback start position button on the input interface 9 such as a remote controller is pressed, the two tables stored in the buffer memory 8 are read, and the registered address information is sorted in the video playback order, that is, in the address order. Then, every time the reproduction start position button is pressed, the video information recorded at the position corresponding to the address in the sorting order is displayed as a still image on the output interface 10 such as a display. It should be noted that, in addition to displaying still images one by one as the reproduction start position information, a plurality of still images can be displayed at once as a multi-screen.

FIG. 6 is a diagram for explaining the concept of the reproduction start position of the optical disk and the display of a still image as reproduction start position information according to the present invention. The example shown in the figure shows a case where the user has interrupted twice while one piece of video information is being reproduced. Reproduction end positions are reproduction end positions # 1 and #
Indicated by 2. Further, in this example, a case is assumed where the user designates one playback start point during each playback (in the figure, this is shown as user-defined positions # 1 and # 2). In an optical disc in which such a situation is registered in each table,
When the user presses the playback start position button, an image corresponding to the position is displayed on the display through the output interface 10 in the order of the user-defined position # 1, the playback end position # 1, the user-defined position # 2, and the playback end position # 2. The information is displayed on the device, and the user determines the actual reproduction start position while referring to this.

Other forms of display to the user are also conceivable. For example, instead of displaying images one by one as described above, there is a method of displaying a plurality of still images as a multi-screen on a display at once. In this case, if the image information at the user-defined position and the image information at the reproduction end position are separately displayed, it is easy for the user to distinguish between the two and contribute to the selection work.

As described above, the reproduction start point is user-defined position information that can be freely set according to the user's request, and the reproduction end position that the apparatus automatically sets by recognizing the reproduction end point. Two types of information have been described. Although a plurality of user-defined position information can be registered, the number of user-defined position information that can be registered is limited because automatic update cannot be performed. This is because the information defined by the user, that is, the part that wants to start playback from that position and registers it, has little difference in importance between the newly registered one and the previously registered one. It was done. If the importance is reduced and a portion that cannot be counted as a reproduction start point is generated, the apparatus may be configured to manually instruct the apparatus to delete unnecessary information. An example of a significant device that records such user-defined position information together with a video on an optical disk is an optical disk device integrated with a camera. In this case, the position at which reproduction is desired to be started differs depending on the user, and the importance of the user-defined position information increases.
The other reproduction end position information is a limited number, but since the old information is sequentially updated to the latest one, there is an advantage that there is no need to delete the information by the user himself, so that there is no trouble. In particular, in the present invention, by providing a plurality of pieces of information that can be registered, there is an advantage that the information can be effectively used for, for example, repetition of language learning and the like. In this language learning case,
Suppose that a user reproduces an English conversation program recorded three consecutive times on an optical disc. The user-defined position information indicates the start position of each program, and the reproduction end point is the end point of a repeated portion of a word in one program, an example of conversation, and the like. In addition, in the present invention, since the table is provided on the optical disk, the disk can be reproduced by devices having various functions. For example, a disc on which a movie or the like is recorded often has optional additional functions such as caption display, multiple languages, and aspect ratio of screen display. Therefore, if only the position information such as the address is registered in the table, the operation state of the apparatus when the user finishes the reproduction is completely unknown on the apparatus side, and often the situation lacks the convenience of the user. It is considered to be.
Therefore, according to the present invention, as information to be registered in each table, not only the address information but also information relating to the operation state of the apparatus at the position where the user has finished playing the disc is registered corresponding to the address. are doing. In this way, regardless of which device the user plays, the user can resume viewing in the same state in which the user has previously finished playing the disc. FIG.
Shows an example of such a reproduction end position information table. As shown in the figure, the reproduction end position information table indicates the reproduction end position indicating the position on the disk and the reproduction state of the optical disk device at that time. The information on the device parameters shown can be registered in association with each other. Embodiment 2 FIG.

In the first embodiment, the position information at which the user wants to start the reproduction as a reproduction start position candidate is registered in the user definition information table at the request of the user. FIG. 8 is a diagram showing a method of specifying the reproduction start position and the like of the optical disk according to the second embodiment. FIG. 9 is an optical disk apparatus for registering information such as reproduction start position information in a table of a light disk by such a method. FIG. 2 is a block diagram showing a schematic configuration of the embodiment. As shown in the figure, in the second embodiment, when recording is performed without being defined by the user,
The apparatus automatically detects a boundary position of a scene or a boundary position of video information such as a program, and registers this position information as an address on an optical disc. This allows
Even if the user does not register the reproduction start point, it is possible to automatically accumulate good reproduction start point candidates on the optical disc. Also, the present embodiment 2 and the first embodiment are combined to reproduce the reproduction end position, the user-defined position, the position information such as the scene change, and the reproduction start position recorded in the same form as the reproduction end position. It is also possible to combine starting points. Specifically, for example, when recording a video signal, the video signal encoding / decoding means 7 detects the presence or absence of a scene change from the code amount of the input video signal and the like. 1
Send information to 1. When the controller 11 obtains the information,
The address of the video in which the scene change has occurred is obtained from the output of the address decoding means 5 and the address is stored in the buffer 8. The stored addresses are registered in the table on the optical disc 1 via the recording / reproducing means 6 and the information recording / reproducing head 4 at predetermined time intervals or at predetermined timing, for example, at the end of recording or at the time of stopping. Although the optical disk has been described as an example of a recording medium according to the above-described embodiment, information is recorded together with an address, for example, in a memory medium that is detachable from an apparatus. The present invention can be applied to any accessible medium without being limited to this.

[0025]

Since the present invention is configured as described above, it has the following effects.

The optical disk according to the present invention has a user-defined position information table in which position information at which a user wants to start reproduction is registered, and a reproduction end position information table in which information on a position at which reproduction is stopped by the apparatus is recorded. However, since the playback end position information table can record a pointer indicating the position of the reproduction end position information to be recorded next and the reproduction end position information indicating a plurality of reproduction end positions, the disc is inserted. Immediately after, reproduction can be started from the previous reproduction interruption point.

Even when the disc is taken to another reproducing apparatus, the reproduction can be started from the previous reproduction end point.

In addition, since a plurality of reproduction end positions are registered, in applications where the frequency of reproduction is high, such as language learning, there is an effect that cueing is easier than in the bookmark function.

In the optical disk reproducing method according to the present invention, the position of the pointer indicating the position of the reproduction end position information to be recorded next in the reproduction end position information table in which the information of the position where the apparatus stopped reproduction is recorded. Is updated from the beginning to the end of the reproduction end position information in the table every time the reproduction end position information is recorded, and is returned to the beginning when the end is reached. Since the new start position is always stored, the registered start points are deleted in order from the old one even if the user does not delete them, so that it is possible to prevent the information of the reproduction start point from being increased more than necessary. .

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a table in which a plurality of reproduction end positions of an optical disc according to Embodiment 1 of the present invention are registered.

FIG. 2 is a diagram showing the size of each area of a reproduction end position information table of the optical disc according to the first embodiment of the present invention and the addresses to be allocated;

FIG. 3 is a diagram showing a state in which reproduction end position information is registered in reproduction end position information of the optical disc according to the first embodiment of the present invention;

FIG. 4 is a diagram showing a configuration example of a user-defined position information table of the optical disc according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of a configuration of an optical disk device according to the first embodiment of the present invention;

FIG. 6 is a diagram illustrating a method of specifying a reproduction start position of the optical disc according to the first embodiment of the present invention.

FIG. 7 is a diagram showing another example of a table in which a plurality of reproduction end positions of the optical disc according to the first embodiment of the present invention are registered.

FIG. 8 is a diagram illustrating a method of specifying a reproduction start position of an optical disc according to the second embodiment of the present invention.

FIG. 9 is a diagram illustrating an example of a configuration of an optical disk device according to a second embodiment of the present invention;

FIG. 10 is a diagram illustrating an example of a configuration of a conventional optical disc device.

[Explanation of symbols]

1 optical disk for recording and reproduction, 2 disk motor, 3
Motor control means, 4 information recording / reproducing head, 5 address decoding means, 6 recording / reproducing means, 7 video signal modulation / demodulation means, 8 buffer, 9 input user interface section,
Reference Signs List 10 output user interface unit, 11 controller, 101 reproduction optical disk, 102 information reproduction head, 103 reproduction means, 104 video signal demodulation means, 1
05 buffer, 106 input user interface,
107 output user interface, 108 controller.

Claims (8)

[Claims] 1. An optical disc on which video information is recorded together with address information, a user-defined position information table for registering address information corresponding to a position of the video information desired by a user, and address information on a position at which the optical disk apparatus has stopped reproducing. An optical disc comprising: a reproduction end position information table for registering the information. 2. The reproduction end position information table according to claim 1, wherein the reproduction end position information table can record a plurality of pieces of address information indicating a reproduction end position and next pointer information indicating a position where the next address information to be recorded is registered. optical disk. 3. The user-defined position information table or the reproduction end position information table registers, along with address information, information relating to the state of the optical disk apparatus that reproduces the optical disk when reproducing the video information at the address information position. The optical disk according to claim 1, which is obtained. 4. The optical disk reproducing method for reproducing an optical disk according to claim 2, wherein the position indicated by the next pointer information moves sequentially from the head of the reproduction end position information table every time address information is registered, and An optical disc reproducing method in which the address information is returned to the top when it becomes full, so that the latest address information is always automatically registered in the table. 5. An optical disk reproducing method for reproducing an optical disk according to claim 1, wherein the video information corresponding to the address information registered in the two tables, the user-defined position information table and the reproduction end position information table. An optical disc reproducing method, which displays on the display device in the reproduction order of the optical discs and sets the reproduction start point as a candidate. 6. An optical disk drive for driving an optical disk according to claim 1, wherein an address detection unit for detecting a position of the optical disk currently being reproduced is registered in a user-defined position information table of the optical disk. A first memory for storing the stored address information, and a second memory for storing the address information registered in the reproduction end position information table of the optical disc, wherein a video signal is being recorded on the optical disc or The address information added during the reproduction of the video signal recorded in the two memories is recorded in the two memories according to the type, and the recorded address information is recorded in the two tables of the optical disc at a predetermined time interval or timing. An optical disk device characterized by being re-read. 7. An optical disk capable of accessing an arbitrary position, in which encoded video information is recorded together with address information indicating a physical position on the optical disk, wherein the user Address information specified by
Alternatively, an optical disc having an area in which address information relating to a specific position in recorded video information can be registered in an updatable manner. 8. The video camera according to claim 7, wherein the specific position is a scene change position of the video information to be recorded.
An optical disc as described.