JPS6280867A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain high information transfer speed and high recording operation while the number of access times to a substitute track is reduced by recording the information recorded to a substitute track in a storage means into the substitute track after the recording of information is finished. CONSTITUTION:A control section 16 stores a track number recorded on a defective track ID area in a TN memory 18 and the information to be recorded stored in a buffer memory 16 is transferred to an RT memory 17. When the information transfer from an interface 5 is finished, the control section 16 operates a linear motor 14, accesses the optical head 3 to the substitute track, reads a defective track number stored in the memory 18 and the information stored in the memory 17, applies coding (17) and uses the head 3 to record it in the substitute track. Thus, the memory 17 is provided to use only one access to the substitute track.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for recording/reproducing information, and more particularly to an information recording/reproducing apparatus intended to increase the overall information recording speed.

[Prior Art] As information recording and reproducing devices, magnetic disk devices, optical disk devices, and magneto-optical disk device caps have been conventionally known, but an optical disk device will be described below as an example.

FIGS. 3(A) and 3(El) are schematic diagrams showing the form of tracks on an optical disc, and FIG. 3(C) is a diagram of the track format.

The optical discs 1 shown in FIGS. 1A and 2B each have concentric solid and spiral tracks T, and further include:
An area of an alternative track RT is provided which is used as a recording area when recording in a certain track area is impossible.

In addition, as shown in FIG. 3(C), each track.

It mainly consists of an area III for storing track numbers and a DATA area for storing data, and any track can be accessed by reading the 10 areas.

Next, the basic operation of a conventional optical disk device using such an optical disk as an information recording medium will be briefly explained.

FIG. 4 is a block diagram of a conventional optical disk device, and FIG. 5 is a flowchart for explaining its operation.

In FIG. 4, an optical disk 1 is rotated by a spindle motor 2, and information is recorded by a light beam 4 from an optical disc 3. Further, the reflected light from the optical disk 1 is received by the optical disc 3 and used for information reproduction, focus control, and tracking control.

Note that tracking control and focus control are performed using AT-AF.
This is done by a circuit 13 , and the optical helad 3 is movable by a linear motor 14 . In addition, the linear motor 14
The operation of the optical head 3 is controlled by a control unit 16 via a motor drive circuit 15, and the optical head 3 can access any track according to a command from the control unit 16.

Here, the operation of recording information on an arbitrary track ↑ of the optical disc l will be explained with reference to FIG.

First, information is stored from the outside through the interface 5 into a buffer memory 8 having a capacity of one track or more (step Sl in FIG. 5), and the optical head 3 is accessed to the track T to be recorded. The information stored in the buffer memory 6 is subject to FCC (Error-C:
The signal is coded by an orrecting code circuit 7 and modulated in a predetermined manner by a digital modulation circuit 8. According to the modulated information, the laser drive circuit 9 drives the laser of the optical disc 3 1 to record information in the form of a pit train on the track T of the optical disc 1 (step S2).

When the information is recorded on the track T in this way, it is checked whether the information is correctly recorded or not, and the information just recorded on the track T is reproduced by the optical disc 3 (step Sl). That is, the information read out by the optical heald 3 is amplified by the F amplifier IO, demodulated by the waveform shaping circuit 11 and the digital modulation circuit 12, and input to the ECC circuit 7.

The ECC circuit 7 similarly inspects the reproduced information to detect errors (step S4). If there is no error here, it is determined whether the following information exists or not (step S9),
Also, if the error can be corrected, the corrected information is recorded on the track T again and the operations of steps S3 and S4 are performed. If the information is recorded correctly, it is determined whether the next information exists or not. S9), if there is transfer information (NO in step S9), step 5l-34 until the transfer is completed.
and repeat S9.

If there is an error in step S4 and it cannot be corrected (NO in step S4), the optical radar 3 is accessed to the training track RT (step 55) 1 alternative truck R
The same information is recorded on T (step S6). When the information is thus recorded on the alternative track RT, the information is reproduced from the training track RT (step S7), and it is determined whether the information has been recorded correctly. It is inspected by the ECC circuit 7 (step S8).

If an error is detected here (NO in step S8),
The above steps 85 to S8 are repeated a set number of times.

If the information is correctly recorded on the + track RT (YES in step S8), it is determined whether there is any information to be transferred next (step S9). If the transfer information is 1 (NO in step S9) ), the operations after step Sl are performed, and if the information transfer is completed (YES at step S9), the recording operation is terminated.The following operations are performed under the control of the control unit 16. Problems to be Solved by the Invention] However, the above-mentioned conventional information recording and reproducing apparatus has a problem in that unnecessary time is required to process one alternative track, which reduces the recording speed as a whole.

That is, as described above, in step S4, the track T
If it is determined that the track T is defective, it is necessary to access the optical head from that track T to the alternative track RT, and when the recording on the alternative track RT is completed, the optical head 3 must be returned to the next track T again. Such an access operation is performed by the movement of the optical head 3 by the linear motor 14 and the tracking operation by the AT-AF circuit 13, and no recording operation is performed during this time.

In particular, in the recording operation of color image information where the amount of information is from several Mbytes to several 1-MB7te, there is a possibility that substitute track processing is performed several times, and each time the optical disk 3 is moved as described above. In conventional information recording and reproducing apparatuses that allow access in this manner, the overall recording operation speed is extremely reduced.

[Means for Solving the Problems] In order to solve the problems of the conventional art, an information recording/reproducing apparatus according to the present invention uses an information recording medium having an alternative recording area, and adds a defective recording area to the alternative recording area. In an information recording/reproducing apparatus having a function of recording information after a period of time, a storage means for storing information to be recorded in the alternative recording area is provided, and after the operation of recording information on the information recording medium is completed, It is characterized in that information stored in the storage means is recorded in the alternative recording area.

[Function] By providing the above-mentioned storage means and storing information to be recorded in an alternative recording area (for example, a substitute recording area), the number of accesses to the substitute recording area can be reduced; Overall, it is possible to achieve faster recording operations and higher information transfer speeds.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of an information recording/reproducing apparatus according to the present invention. However, the same parts as those in the conventional example will be labeled with the same and aromatic characters to simplify the explanation.

In the same figure, a buffer memory 6 that stores information transferred from the outside via an interface 5 has l.
A substitute track buffer memory 17 (hereinafter referred to as 8-block memory 17) having a capacity larger than that of the RT memory 17 is connected, and the output end f- of the RT memory 17 is connected to the ECC circuit 7.

The information stored in the buffer memory 6 is encoded by an ECC circuit 7, and is also encoded by a digital modulation circuit 8. The optical disc 1 is driven by the optical head 3 through the laser drive circuit 9.
recorded in The recorded information is read out from the optical radar 3 for inspection and sent to the head amplifier lO1 waveform shaping circuit 1.
1 input to the ECC circuit 7 via the digital demodulation circuit 12,
It will be inspected there. The test results are output to the control section 16, and error control is performed as described later.

The control unit 1B also includes a track number memory 1B.
(hereinafter referred to as TN memory 18) is connected, and the numbers of defective tracks whose errors are determined to be uncorrectable by the above error control are stored.

Next, the alternative track processing operation of this embodiment will be explained with reference to FIG.

FIG. 2 is a flowchart showing the operation of this embodiment.

In the figure, the operation when the recorded information is reproduced without error is the same as the conventional one, and is shown in steps 5l-S4 and S9. Therefore, the operation when error correction is impossible will be explained.

First, when certain information is transferred from the outside and stored in the buffer memory 6 via the interface 5, the control unit 1
6 is the AF-AT circuit! 3 and the readout signal t) from the waveform shaping circuit 11, etc. to the motor drive circuit 15.
1 signal is output, the linear motor 14 is operated, and the optical radar 3 is accessed to a predetermined track. After the information is recorded on the track, +1 information is generated from the track for inspection (steps S1 to S3).
.

+lT When it is determined that the error in the generated information is uncorrectable and that the track is a defective track (NO in step S4), the control unit 1B changes the track number recorded in the 10 area of the defective track. TN memory 18
The information to be recorded stored in the buffer memory 6 is transferred to the RT memory 17 (step 5T2), and the above operations (steps S1 to
S3, S9 or STI, Sr1) are repeated until the information transfer from the interface 5 is completed, and all the information transferred from the outside is correctly recorded on the track of the optical disc l, or if the track is a defective track. is RT
It is stored in the memory 17.

When the information transfer from the interface 5 is completed (YES (# in step S9)), the operation of recording the information stored in the RT memory 17 onto the alternative track is started.

First, the controller 16 operates the linear motor 3 to access the optical radar 3 to the alternative track (Step 5T
3) Next, the information stored in the RT memory 17 and the defective track number stored in the NT memory 18 are read out and encoded in the ECC circuit 7, and the digital modulation circuit 8 and laser drive circuit 9 are read out. Then, it is recorded on an alternative track by optical herad 3 (step 5T
4).

The information recorded on the alternative track is read out by the optical radar 3 for inspection, and sent to the head amplifier lO1 waveform shaping circuit 11. EC is reproduced by the digital demodulation circuit 12.
Input to C circuit 7 (steps ST5 and 5te)
.

The ECC circuit 7 inspects the reproduced information and outputs the result to the control section 16. If an error is detected (NO in step ST8), the control unit 1B performs the steps ST3 to ST3 described above.
Repeat ST5 the set number of times.

When the information is correctly recorded in the alternative trunk (YES in step ST8), the control unit 16 determines whether the information is stored in the RT memory 17 (step 5T7). If there is information (NO in step ST7), step ST3
The subsequent operations are performed in the same manner, and the recording operation ends when all the information stored in the RT memory 17 is correctly recorded on the alternative track (YES in step S8).

In this way, if the RT memory t7, which has a capacity of 1 - minutes, is erased, the alternative track can be accessed only -. times.

Note that in this embodiment, an optical disc l is used as the information recording medium.
Although a case has been described in which a recording medium is used, the present invention is of course not limited to this, and any recording medium including a magnetic disk, a magneto-optical disk, etc. and having an alternative track may be used.

[Effects of the Invention] As explained in detail, the information recording/reproducing apparatus according to the present invention is provided with a storage means for storing information to be recorded on one alternative track, so that the information recording operation can be performed after the information recording operation is completed. The information stored in the storage means can be recorded on the substitute track, reducing the number of accesses to the substitute track.
Overall, it is possible to achieve faster recording operations and higher information transfer speeds.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of an information recording/reproducing apparatus according to the present invention, and FIG. 2 is a flowchart showing the operation of the embodiment. 3(A) and 3(B) are schematic diagrams showing the track form of an optical disc, FIG. 3(C) is a track format diagram, and FIG. 4 is a block diagram of a conventional optical disc device. FIG. 5 is a flowchart for explaining the operation of the conventional example. l... Optical disc 3φ fist/optical head 800. Buffer memory 7...ECC circuit 17...Buffer memory for tracks (RT memory) 18-...I (Good track number memory (TN memory) Agent Patent attorney Minoru Yamashita Figure 2 Figure 3 Diagram (A) (B) (C)

Claims (1)

[Claims] (1) In an information recording/reproducing device that uses an information recording medium having an alternative recording area and has a function of recording information in the alternative recording area in place of a defective recording area, storing information to be recorded in the alternative recording area. An information recording/reproducing apparatus characterized in that the information recording/reproducing apparatus is provided with a storage means for recording information on the information recording medium, and records the information stored in the storage means in the alternative recording area after the operation of recording information on the information recording medium is completed.