JPH06195723A - Optical information recording and reproducing device - Google Patents

Abstract

PURPOSE:To continuously control the operation of recording, erasing and reproducing from the inner circumference to the outer circumference of a disk and from the outer circumference to the inner circumference thereof. CONSTITUTION:Tracks 1a, 1b, 1c... and 2a, 2b, 2c... are formed in an optical disk 3, and when a light beam 1 used for erasing and recording and a light beam 2 used for reproducing are going from the inner circumference A to the outer circumference B, the tracks 1a, 1b, 1c... are scanned, and when they are going from the outer circumference B to the inner circumference A, the tracks 2a, 2b, 2c... which are different from the tracks 1a, 1b, 1c... are scanned. Thereby, continuous recording, erasing and reproducing can be performed from the inner circumference A to the outer circumference B of the optical disk and from the outer circumference B the inner circumference A thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewritable optical information recording / reproducing apparatus using, for example, a magneto-optical disk or a phase change type optical disk.

[0002]

2. Description of the Related Art As a conventional technique, Japanese Patent Application Laid-Open No. 2-1871
As shown in No. 3, there is an optical information recording / reproducing apparatus using an optical disk which is rewritable by utilizing a magneto-optical effect or a crystalline-amorphous phase change. This is for reproducing, erasing and recording by using two light beams.

FIG. 4 is a block circuit diagram showing another conventional example disclosed in Japanese Patent Laid-Open No. 2-18713. Reference numeral 21 denotes a laser beam which is a first light beam, and reproduces information previously recorded on a predetermined track of an optical disc as an information recording medium. Reference numeral 22 denotes a laser beam which is a second light beam, and at the same time as erasing the information recorded on a predetermined track of the optical disk, recording new information.

Next, the operation of this conventional example will be described. First,
The first light beam 21 irradiates the information bit string recorded on the optical disc with a laser beam to reproduce data 24.
To read. The reproduced data 24 is subjected to deinterleaving processing and error correction decoding processing by the decoding circuit 25,
It is input to the mixing circuit 26.

In the mixing circuit 26, the output of the decoding circuit 25a and the input data 27 from the outside are mixed,
It is input to the encoding circuit 28. In the encoding circuit 28, encoding processing and interleaving processing are performed, and new recording data 29 is recorded on the optical disc by the second light beam 22. There is a time difference of tH from the irradiation of the first light beam 21 to the irradiation of the second light beam 22.

With the above configuration, while reproducing information previously recorded on the optical disc, new information is added and mixed with the reproduced information, and the mixed information is recorded on the optical disc. You can re-record at the location.

It should be noted that, in FIG. 4, known devices can be appropriately used as the drive device, the optical device, the detection device for the reproduction signal and the control signal, and the servo device of the optical disk as the information recording medium, and therefore, the illustration and description thereof will be made. Is omitted.

However, since the above-mentioned conventional optical information recording / reproducing apparatus records, erases or reproduces in one direction from the inner circumference to the outer circumference or from the outer circumference to the inner circumference of the optical disc, this operation is repeated. In the case of attempting to do so, due to the head configuration and the track configuration on the optical disc, after the light beam reaches the innermost peripheral edge (or the outermost peripheral edge) of the optical disc, the outermost peripheral edge (or the outermost edge) of the optical disc is restarted. Since recording, erasing, and reproducing must be performed from the inner peripheral edge), it takes time for the light beam to move, and information loss, delay, etc. occur, causing continuous recording, erasing, and reproducing of information. There was a problem that I could not do it.

[0009]

In the above-mentioned conventional optical information recording / reproducing apparatus, all the light beams always scan the same track and are always in the same direction with respect to the predetermined moving direction on the optical disc. Therefore, if you try to record, erase, or reproduce while moving to the innermost edge (or outermost edge) of the optical disc and then moving to the outermost edge (or innermost edge) of the disc again, the light beam There is a drawback in that it is unavoidable that unnecessary time is required for moving the media and continuous recording, erasing and reproducing cannot be performed. Therefore, an object of the present invention is to obtain an optical information recording / reproducing apparatus which eliminates the above drawbacks and enables continuous recording / reproducing operations.

[0010]

In order to achieve the above object, according to the present invention, a first light beam for reproducing first data recorded on an optical disc and erasing the first data. In addition, the second light beam for recording new second data and the first and second light beams from the inner circumference of the optical disc during recording, erasing and reproducing on the optical disc. There is provided means for scanning different tracks when going to the outer circumference and when going from the outer circumference to the inner circumference.

[0011]

According to the above-mentioned structure, the first and second light beams move to the innermost peripheral edge (or outermost peripheral edge) of the optical disc and the outermost peripheral edge of the optical disc. Since information is recorded, erased, and reproduced by scanning different tracks when moving to (or the innermost peripheral edge), the first and second light beams are transmitted from any position on the optical disc. Even if recording, erasing and reproducing of information are started, the operation can be continuously performed.

[0012]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a conceptual diagram showing an embodiment of the present invention. As shown in the figure, the optical disc 3 is provided with tracks 1a to 1c and 2a to 2c. First, the erasing and recording light beam 1 scans from the outer circumference B of the disk toward the inner circumference A of the disk in the order of tracks 2a to 2c. After the light beam 2 reaches the innermost track 1c of the optical disc 3, the track when traveling toward the outer circumference B of the optical disc again is a track 1b different from the track scanned from the outer circumference to the inner circumference. 1a is scanned to reach the outermost track 2a.
On the other hand, the reproduction light beam 2 performs the same operation as the light beam 1 from the outer circumference to the inner circumference of the disc, and further from the inner circumference to the outer circumference.

By performing such control, the rewritable optical disc does not lose recording / reproducing information, and the shift time from the innermost circumference (outermost circumference) to the outermost circumference (innermost circumference) of the light beam. Therefore, recording, erasing and reproducing can be continuously performed regardless of the position on the optical disc where the light beam starts scanning.

Since known devices can be appropriately used for the disk drive device, the optical device, the detection device for the reproduction signal, the control signal and the like, the servo circuit and the like will not be shown and described. FIG. 2 is a conceptual diagram showing another embodiment of the present invention.

In this embodiment, when going from the inner circumference A (or outer circumference B) to the outer circumference B (or inner circumference A) of the optical disk and when going from the optical disk outer circumference B to the optical disk inner circumference A. As long as different tracks are scanned in, any track may be used, and as shown here, the tracks 4a, 5a, 6a may be formed by being sequentially repeated. At this time, for example, the tracks 4a, 4b ... Are sequentially scanned from the outer circumference B side of the optical disk, and after reaching the inner circumference A side, the tracks ... 5b, 5a.
To reach the outer circumference B, and again the tracks 6a, 6b ...
To scan.

In this embodiment, for example, when the reproducing light beam and the erasing and recording light beam are simultaneously operated in the direction from the inner circumference A to the outer circumference B of the optical disc (or the opposite direction), Different tracks can be scanned. Thus, the two light beams can be combined into one scanning drive device. FIG. 3 is a block diagram showing another embodiment of the present invention.

In this embodiment, as one of the applications of the optical information recording / reproducing apparatus, this apparatus is used as a buffer when recording / reproducing a video signal or the like in a VTR, for example. Here, the same components as those in the embodiment shown in FIG. 1 are designated by the same reference numerals. A video tape 11 is loaded in the VTR and runs in the direction of the arrow. 1
Reference numeral 2 is a track recorded on the video tape 11, and 12 is a VTR recording magnetic head.

In the operation of this embodiment, recording is first started by the light beam 1, and the recorded information activates the VTR when, for example, the video tape is ready. Light beam 1
The reproduction of the information recorded in 1 is sequentially started by the light beam 2, and the reproduced information is recorded on the video tape.

During this time, the erasing and recording are continued with the light beam 1, but the light beam 1 is stopped at the portion where recording is unnecessary such as commercial, and the reproducing operation is continued only with the reproducing light beam 2, and the light beam 2 is In this system, the recording operation of the information is directly transferred to the VTR side when the light beam 1 is caught up, that is, when the reproduction of the information recorded by the light beam 1 is completed. Further, when only the reproducing light beam 2 is moving, by increasing the reproducing speed of this light beam, information recording can be moved to the VTR side earlier, and this embodiment reproduces this recording track after reproducing. Since the operation of overwriting new information on the completed track is repeated, it plays the role of a buffer.
When recording a video signal with R, the video tape that you want to record when the video tape is not loaded in the VTR main body, rewinding or fast-forwarding is necessary even if loaded, or when it is in the recording standby state. It is possible to prevent missing the first part of the video information or audio information of the program to be recorded because the tape position to be recorded is not ready for cueing. Also, by combining the optical information recording / reproducing device as a buffer with a VTR,
Long time recording can be realized.

It is needless to say that the content of the information in the present invention may be a still picture, a moving picture, or compressed information. The light beams 1 and 2 may operate independently or may have an integrated structure, and are not limited to either.

[0022]

As described above, according to the present invention, recording, erasing and reproducing operations can be continuously controlled without any information loss or delay.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a schematic view showing another embodiment of the present invention.

FIG. 3 is a configuration diagram showing another embodiment of the present invention.

FIG. 4 is a block circuit diagram of a conventional optical information recording / reproducing apparatus.

[Explanation of symbols]

1 ... Light beam for erasing and recording, 2 ... Light beam for reproducing,
3 ... Optical disc, 11 ... Magnetic tape, 12 ... Magnetic head, 13 ... Recording pattern, 24 ... Reproduction data, 27 ...
Input data.

Claims (1)

[Claims] 1. A first light beam for reproducing first data recorded on an optical disc, and a second light beam for erasing the first data and recording new second data. Beam and different tracks when the first and second light beams travel from the inner circumference to the outer circumference and from the outer circumference to the inner circumference of the optical disc during recording, erasing and reproducing on the optical disc. And a means for scanning the optical information recording / reproducing apparatus.