JPH11297052A - Optical disc playback device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To surely perform a resume operation in which a previous reproduction stop point is automatically set to a next reproduction start point regardless of whether an optical disk recording medium is exchanged or moved between devices. SOLUTION: In an optical disc reproducing apparatus configured to be able to reproduce recorded information of an optical disc recording medium capable of recording and reproducing from an arbitrary position in the medium, the optical disc reproducing apparatus transmits resume information indicating a next reproduction start point of the optical disc recording medium to the optical disc. It is stored in the management information area of the recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology effective when applied to an optical disk reproducing apparatus, and further to an optical disk reproducing apparatus for reading and reproducing recorded information stored on a recordable / reproducible optical disk recording medium. For example, the present invention relates to a technique which is effective when used in a recording / reproducing apparatus using a magneto-optical recording mini-disc so-called MD as a recording medium.

[0002]

2. Description of the Related Art An optical disk reproducing apparatus using a recordable / reproducible optical disk recording medium such as an MD records information on a track developed on a plane on a disk, and the recorded information can be immediately reproduced from an arbitrary position. . Therefore, the cueing operation by rewinding / fast-forwarding the magnetic tape performed in the conventional magnetic tape recording / reproducing device is unnecessary,
The user can instantly search for the beginning by simply designating the title of the song or the time from the start reproduction point.

Further, a playback stop point is stored in a memory in the apparatus, and a next playback start point is designated based on information stored in the memory in the apparatus. , The next reproduction can be automatically started from the stop position. A so-called resume function can be provided.
An outline of this type of optical disc reproducing apparatus is described in, for example, pages 106 and 107 of “Nikkei Electronics, May 27, 1991, No. 528” published by Nikkei BP.

[0004]

However, it has been clarified by the present inventors that the above-described technology has the following problems.

That is, the above-described conventional optical disk reproducing apparatus has a resume function of automatically setting the previous reproduction stop point to the next reproduction start point. This resume function is performed when the same optical disk recording medium is continuously loaded in the same apparatus. If the optical disk recording medium is exchanged for another optical disk recording medium or the optical disk recording medium is moved to another playback device, the previous playback stop point of the device is effective. That is, there arises a problem that the resume information content becomes invalid and the reproduction from the previous reproduction stop point cannot be performed.

An object of the present invention is to ensure that a resuming operation in which a previous reproduction stop point is automatically set to a next reproduction start point is performed irrespective of whether an optical disk recording medium is exchanged or moved between devices. It is another object of the present invention to provide a recording medium reproduction control technique.

The above and other objects and features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0008]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

That is, in an optical disk reproducing apparatus configured to be able to reproduce recorded information of an optical disk recording medium capable of recording and reproduction from an arbitrary position in the medium, the resume information for instructing a next reproduction start point of the optical disk recording medium is transmitted to the optical disk reproducing apparatus. This is stored in the management information area of the optical disk recording medium.

According to the above-described means, the resume information can be provided for each optical disk recording medium separately from the attribute of each device. As a result, regardless of whether the optical disk recording medium is exchanged or moved between devices,
The object is achieved of reliably performing the resume operation in which the previous reproduction stop point is automatically set to the next reproduction start point.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of an optical disk reproducing apparatus to which the technology of the present invention is applied.

The optical disk reproducing apparatus shown in FIG. 1 is a digital recording / reproducing apparatus using a magneto-optical recording type optical disk recording medium, so-called MD1, and includes a spindle motor
1, optical head 22, signal processing and servo processing unit 31,
Memory (RAM) 32, memory control unit 33, audio data compression / decompression unit 34, D / A converter 35, A / D converter 3
6, system control unit 37, disc ejection control unit 38,
The resume control unit 39 includes the operation panel 5 and the like.

The spindle motor 21 drives the MD 1 to rotate at a constant linear speed under the control of the signal processing and servo control unit 31. The optical head 22 writes or reads information while tracing the recording track of the rotating MD1. The signal processing and servo processing unit 31 performs signal processing for writing and reading information, rotation control of the spindle motor 21, seek control of the optical head 22, and the like.

The memory 32 is configured using a RAM, and temporarily stores recording / reproducing information under the control of a memory control unit 33 in a buffer. The memory 32 is also used to temporarily store the TOC information of the MD 1 and the resume information indicating the current playback position. The memory control unit 33 controls the flow of write information (record information) and read information (reproduction information) between the signal processing and servo processing unit 31 and the audio data compression / decompression unit 34.

The audio data compression / expansion unit 34 performs encoding / compression of digital recording data and decoding / expansion of digital reproduction data. The D / A converter 35 converts the digital reproduction data into an analog signal and converts it into a speaker (or headphones).
Give to 41. The A / D converter 36 converts the analog audio signal captured by the microphone 42 into a digital signal and supplies the digital audio signal to the audio data compression / expansion unit 34.

The system control unit 37 is configured using a microcomputer which is a general-purpose processing device, and centrally manages and controls the operation of each unit.

When the MD1 is ejected, the disc ejection control unit 38 records resume information indicating a next playback start point (previous playback stop point) in the TOC area 11 set in the innermost track of the MD1. .
The resume control unit 39 specifies a reproduction start point based on the resume information recorded in the TOC area 11 when the MD 1 is loaded.

The disc ejection control unit 38 and the resume control unit 39 can be implemented by software using a microcomputer constituting the system control unit 37.

The operation panel 5 comprises a display section 51 of a dot matrix type using a liquid crystal display or the like, and an operation section 52 having various operation keys. The operation unit 52 includes keys for performing operations such as reproduction and skipping (song skipping).
A keyboard for inputting characters / numbers, a key for disc ejection operation, a key for setting a resume function, and the like are arranged.

FIG. 2 shows an optical disk recording medium MD1.
3 shows the contents of the TOC information.

As shown in FIG. 1, the innermost circumference of MD1 has T
Although the OC area 11 is set, this TOC area 1
In addition to the information such as the head address of each recording track and the type of disc, the disc 1 also records the name of the disc and the name of the song. The disc name and song title are open to the user, and the user can record any disc name and song title (title).

Here, the resume information is recorded in the recording area of the disc name in the form of a time (minute, second) from the head reproduction point of the disc to the next reproduction start point.

FIG. 3 is a flowchart showing the operation of the disc ejection control unit 38.

When the user performs a disc ejection operation on the operation unit 52, the following disc ejection control is executed.

First, prior to the ejection operation of the MD1, it is checked whether the resume function is set (on / off) by the user (S11).

If the resume function is not set, the discharge operation of the MD1 is executed as it is (S13).

If the resume function has been set in advance by the user, the resume information is read from the memory in the apparatus when the disc is ejected and recorded in the TOC area 11 of the MD 1 (S12). The resume information at this time is, as described above, the time from the first reproduction point to the next reproduction start point (13 minutes and 35 seconds in the illustrated example).
Is recorded as the disc name.

Thereafter, the discharging operation of MD1 is executed (S13).

FIG. 4 is a flowchart showing the operation of the resume control unit 39.

In FIG. 3, when the MD1 is loaded in the apparatus, first, the TOC information is read from the TOC area 11 of the MD1 (S21).

Next, it is checked whether the resume function has been set by the user in advance (S22).

If the resume function has not been set,
The reproduction is started from the head of the disc (S23, S24).

If the resume function is set, it is determined whether or not resume information is recorded in the disc name recording area in the read TOC information (S2).
6). This determination is made based on whether a playback start pointer (time data) is recorded as the disc name.

If the reproduction start pointer is recorded as the disc name, reproduction is started from the position indicated by the reproduction start pointer (S26, S24).

As described above, the recorded information of MD1 is
In an optical disc reproducing apparatus configured to be able to reproduce from an arbitrary position in D1, resume information indicating the next reproduction start point of MD1 is recorded in TOC area 11, and based on the resume information recorded in TOC area 11. By designating the reproduction start point, the resume information can be separated from the attribute of each device and provided for each MD1.

Thus, regardless of whether the MD1 is exchanged or moved between devices, the resume operation in which the previous reproduction stop point is automatically set to the next reproduction start point can be reliably performed.

As described above, claim 1 of the present invention
The present invention is an optical disc reproducing apparatus configured to be able to reproduce recorded information of an optical disc recording medium (1) capable of recording and reproduction from an arbitrary position in the medium (1), and to start next reproduction of the optical disc recording medium (1). The resume information indicating the point is stored in the management information area (11) of the optical disk recording medium (1), whereby the device attribute of the resume function is eliminated and the resume is performed for each recording medium. Can be done.

According to a second aspect of the present invention, in the first aspect, when the optical disc recording medium (1) is ejected, resume information indicating a next reproduction start point is recorded in a management information area of the optical disc recording medium. Control means (38); and resume control means (39) for designating a reproduction start point based on resume information recorded in the management information area when the optical disc recording medium (1) is loaded. Thus, regardless of whether the optical disk recording medium is exchanged or moved between devices, the resume operation in which the previous reproduction stop point is automatically set to the next reproduction start point can be reliably performed.

According to a third aspect of the present invention, in the first or second aspect, a disk of a magneto-optical recording system is used as a recording medium, and a disk name recording area of a user management information area (11) at an innermost circumference of the disk. And a disc ejection control means (38) for recording resume information on the disc. This allows the resume for each medium to be performed without any change in the disc format standard or the like. Can be made.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the resume information indicating the next reproduction start point by time data from the first reproduction point is stored in the management information area (11) of the optical disk recording medium (1). ), And a resume control means (39) for designating a reproduction start point based on the resume information recorded in the management information area (11). As a result, time-series information such as audio can be correctly resumed and reproduced on a time basis.

Although the invention made by the inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist thereof. Needless to say.

For example, the resume information may be in a format other than the time data.

In the above description, the invention made by the inventor has been mainly described in the field of application MD which is the background of the invention.
The case where the present invention is applied to a player has been described. However, the present invention is not limited to this. For example, the present invention can be applied to a DVD (digital video disk) player.

[0045]

The effects obtained by typical ones of the inventions disclosed in the present application will be briefly described as follows.

That is, regardless of the exchange of the optical disk recording medium or the movement between the apparatuses, the effect that the resume operation in which the previous reproduction stop point is automatically set to the next reproduction start point can be surely performed. Can be

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an optical disk reproducing apparatus to which the technology of the present invention is applied.

FIG. 2 is an explanatory diagram showing TOC information content of an MD1 which is an optical disc recording medium.

FIG. 3 is an operation flowchart of a disc ejection control unit.

FIG. 4 is an operation flowchart of a resume control unit.

[Explanation of symbols]

 Reference Signs List 1 optical disk recording medium (MD) 11 management information area (TOC area) 21 spindle motor 22 optical head 31 signal processing and servo processing unit 32 memory (RAM) 33 memory control unit 34 compression / decompression unit 35 D / A converter 36 A / D converter 37 System control unit 38 Disc ejection control unit 39 Resume control unit 41 Speaker 42 Microphone 5 Operation panel 51 Display unit 52 Operation unit

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tamio Taguchi 5-22-1, Josuihonmachi, Kodaira-shi, Tokyo Inside Hitachi Cho LSI Systems Co., Ltd.

Claims (4)

[Claims] 1. An optical disk reproducing apparatus configured to be able to reproduce recorded information of an optical disk recording medium capable of recording and reproduction from an arbitrary position in the medium, wherein the resume information indicating a next reproduction start point of the optical disk recording medium is transmitted to the optical disk reproducing apparatus. An optical disc reproducing apparatus characterized in that it is stored in a management information area of an optical disc recording medium. 2. An optical disc reproducing apparatus configured to be able to reproduce recorded information on a recordable and reproducible optical disc recording medium from an arbitrary position in the medium, wherein when the optical disc recording medium is ejected, a resume instruction for indicating a next reproduction start point is provided. Disc ejection control means for recording information in a management information area of the optical disc recording medium, and resume control means for designating a reproduction start point based on resume information recorded in the management information area when the optical disc recording medium is loaded. The optical disk reproducing device according to claim 1, further comprising: 3. A disk ejected by using a magneto-optical recording disk as a recording medium and recording resume information in a disk name recording area of a user management information area (TOC area) at the innermost periphery of the disk. 3. The optical disk reproducing apparatus according to claim 1, further comprising a time control unit. 4. A disc ejection control means for recording, in a management information area of an optical disc recording medium, resume information for designating a next reproduction start point by time data from a head reproduction point, and resume information recorded in the management information area. 4. A resume control means for designating a reproduction start point based on the control information.
An optical disc playback device according to any one of the above.