JPH06325550A - Disc recorder/reproducer - Google Patents

Abstract

PURPOSE:To obtain a disc recorder reproducer in which an unrecorded region can be ensured through reorganization of recorded signals. CONSTITUTION:A signal reproduced through a head 1 is subjected to signal processing 3 to produce a recording signal of the head 2 and the signals recorded on side A of a disc 5 are recorded simultaneously on side B thus reorganizing the signals. Since a high capacity memory is not required, an unrecorded region can be ensured at a high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus provided with an unrecorded area by reorganizing data and a simple editing function.

[0002]

2. Description of the Related Art Conventionally, a disk recording / reproducing apparatus having a function of securing an unrecorded area is described below (for example, Japanese Patent Laid-Open No. 62-102493).

The recording area of the disc is divided into two areas, one for overwriting (overwriting) and the other for storage, and temporary writing of data is performed in the recording area for overwriting, and finally data is stored. If necessary, the necessary signal is reproduced from the recording area for overwrite, once written in the memory, and the contents of the memory are rewritten in the recording area for storage.

As a result, if the storage is not necessary, the unrecorded area of the disc is secured by recording in the recording area for overwrite each time and re-recording only the necessary signal in the recording area for storage. Was going on.

[0005]

However, in the above configuration, when rewriting a necessary signal in the storage area for storage, it is necessary to pass through the memory, and it takes time to store the data.

Further, there is a problem that a large capacity memory is required to store a large amount of data at one time.

The present invention solves the above problems, and an object of the present invention is to provide a disc recording / reproducing apparatus capable of performing editing in a short time without requiring a large capacity memory for editing.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides first and second heads, control means for individually controlling them, a reproduction signal of one head, and a reproduction signal of the other head. And signal processing means for supplying the

[0009]

According to the present invention, with the above-described structure, the signal of an arbitrary recording area of the disk is reproduced by one head, and the signal is simultaneously written in the other recording area by using the other head, thereby unrecording. It is possible to secure an area and perform a simple editing function.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a disk recording / reproducing apparatus according to an embodiment of the present invention. Reference numerals 1 and 2 are heads for recording / reproducing signals, and 3 is processing for error checking a reproduction signal from one of the heads. After that, a signal processing unit for simultaneously recording signals to the other head, 4 is a head control unit for driving each head, and 5 is a disk which is a medium.

Next, the relationship and operation of the above-mentioned respective constituent elements will be described with reference to the drawings. It is assumed that the disk has recording areas on both sides thereof, that is, side A and side B, respectively, and corresponding heads are head 1 and head 2.

Each head can be individually controlled by the head controller 4. First, the head driving method and the signal processing will be described. When the head 1 is in the reproducing operation and the head 2 is in the recording operation, the signal recorded on the A side is read from the head 1 and passes through the signal processing unit 3. By this operation, the reproduction signal of the A side, which becomes a recording signal for the head 2, is re-recorded on the B side at the same time.

The above operation will be described with reference to the explanatory view of the recording area of the disc shown in FIG. In FIG. 2, (a) shows the relationship of the recording signals on the surface of the disc A,
It is assumed that a, a, u, and d represent patterns of recording signals and have already been written. (B) shows the relationship of recording signals on the surface B of the disc. Is a pattern of a recording signal after reorganization.

The signal a recorded on the disk A side,
Out of a, u, and e, the signal that needs to be saved is
In cases a) and d), unrecorded areas and unnecessary recording areas are scattered, and it is difficult to effectively use these areas.

In this case, the head 1 is moved to the position of the signal A recorded on the surface A by the head controller 4, and the head 2 is moved to the outermost circumference of the surface B. Next, according to the above description, The head 1 performs the reproducing operation and the head 2 performs the recording operation, and the recording signal A on the A side is reorganized at the same time to the outermost circumference of the B side via the signal processing unit 3.

By this operation, of the signals A, A, C, and D recorded on the A side, only the signals A, A, and D that need to be saved are reorganized to the B side. All areas can be used as an unrecorded area. Even for the B side, it is possible to effectively secure the unrecorded area by reorganizing only necessary signals in one place as shown in FIG. .

As described above, according to the present embodiment, it is possible to secure the unrecorded area by the reorganization operation of writing the reproduction signal from one head into another arbitrary recording area at the same time by using different heads. .

Further, instead of securing an unrecorded area, one side of the double-sided disk is used as a master signal and the other side is used as a work area, and necessary signals of the master signal are rearranged arbitrarily and rewritten in the work area. This allows simple editing with one deck and one disc.

Further, the access time can be shortened by rearranging the signals in the vicinity in the descending order of frequency of signal reproduction.

In the present invention, two heads and two recording surfaces of the disk are used for simplicity of description.
The effect is the same when a plurality of heads are used or in a single-sided recording disk.

[0022]

As described above, according to the present invention,
By reorganizing at high speed without using dedicated memory,
An unrecorded area can be secured, simple editing can be performed, and access time can be shortened.

[Brief description of drawings]

FIG. 1 is a block diagram of a disk recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a recording area of a disc used in an embodiment of the present invention.

[Explanation of symbols]

 1, 2 heads 3 signal processing unit 4 head control unit 5 disk

Claims (2)

[Claims] 1. A first head and a second head arranged on a recording surface of a disk, and controlling the first head to a reproducing state in an arbitrary recording area of the disk, and A control means for controlling a recording state in another recording area of the disc; and a signal processing means for supplying the signal reproduced by the first head to the second head for rewriting at the same time. Characteristic disk recording / reproducing device. 2. The disk recording / reproducing apparatus according to claim 1, wherein the first head is arranged on one recording surface of the disk and the second head is arranged on the other recording surface.