JPH07334976A - Method for correcting recording information of optical disk - Google Patents

Abstract

PURPOSE:To assure continual execution of a reproduction operation even if address data are erroneously recorded by correcting the end addresses of a data recording region by replacing with the upper limit address of the recording region. CONSTITUTION:An incorrect recording information data judging means 2 judges presence or absence of the incorrect recording information data while refering to data 5a accessed from a memory section 5 for transferring the recording information and standard track address data 4a accessed from reference data 4. At this time, whether the end addresses of the respective tracks in the data recording region are larger than the upper limit address Z of the uppermost peripheral track of the data recording region 7b or not, is judged. The end addresses of the respective tracks of the user recording part are inputted as the incorrect recording information data 2a to a correcting means 3 if these end addresses are larger than the address Z. The correction data 3a to correct the end addresses of the corresponding tracks of the data recording region by replacing with the address Z is composed in the means 3, and the memory section 5 is corrected with the data 3a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to recording information correction of an optical disk, and more particularly to an optical disk in which an address is erroneously read from a rewritable recording information area or an address is erroneously written in the recording information area. The present invention relates to a recorded information correction method.

[0002]

2. Description of the Related Art As a user-recordable optical disc,
The magneto-optical disk 8 having the structure shown in FIG. 3 will be described below as an example.

The magneto-optical disk 8 has a TOC (Table Of Content) whose innermost diameter corresponds to the table of contents of data.
s) A region 7c is arranged, and a recording information region 7a is formed on the outer diameter side from the gap 7d on the outside as a sakai.
(Hereafter, User's Table Of Conte
nts (referred to as UTOC area), data recording area 7
b is provided, and the lead-out area LO is provided at the outermost diameter. In the data recording area 7b, recorded data recorded by the user, for example, in the case of sound data, a plurality of music pieces 1, music pieces 2, music pieces 3, and music pieces 4 are recorded, and these music pieces are recorded in the UTOC area 7a as shown in FIG. It is managed as shown in. That is, FIG.
As shown in FIG. 3, the tune 1 has the start address A to the end address B of the track number 1. The song 2 has an end address C of track number 2 to an end address G of track number 6. Song 3 has a start address H of track number 7 to an end address K of track number 8. The song 4 has a start address M to an end address N of track number 9.

Here, the start address of song 1 is A
Since the end address is B and the size of the address number is A <B, it is a normal address.

The song 2 is divided and recorded on two tracks, and the start address of the first track is C.
Since the end address is D and the size of the address number is C <D, it is a normal address. Further, since the start address of the second track is F, the end address is G, and the size of the address number is D <F <G, it is a normal address. Also, since the music 3 is recorded on two tracks like the music 2, and the size of the address number is H <I <J <K, it is a normal address.

Then, the start address of song 4 is M
Since the end address is N and the size of the address number is M <N, it is a normal address. Further, the addresses A to N of each music must be smaller than the upper limit address Z of the outermost diameter track of the data recording area 7b.

[0007]

When the magneto-optical disk 8 is inserted into the optical disk device or when the power of the optical disk device is turned on, the optical disk device once reads the contents of the UTOC area 7a of the magneto-optical disk 8 into the memory part and reads the contents. Data recording area 7b with the contents of the UTOC area 7a
Was being managed. As described above, the correct address of the contents of the UTOC area 7a is not always recorded in the memory unit as described above, and an incorrect address is erroneously recorded in the memory unit. Sometimes. As an example of the illegal address, as shown in the song 4 shown in FIG. 5, the end address is larger than the upper limit address Z of the outermost diameter track of the data recording area 7b or the lead-out area LO, instead of the correct N. It may be erroneously written in an address that does not exist.

Alternatively, as in the case of song 2 in the figure, the end address may be erroneously written as E instead of correct G, which is a small address inside the start address M of the recording block.

When there is an illegal address as described above, the optical disk drive device has a structure for stopping the reproduction operation by an error, so that the operation cannot be continued, and it is released in the so-called hang-up state. It was very inconvenient for the user. Moreover, this has led to an unfavorable result particularly in BGM reproduction or the like in which endless reproduction of a plurality of music pieces is continuously performed.

An object of the present invention is to solve the above-mentioned problems of the prior art. In an optical disc having a recording information area, the address data recorded in the recording information area is stored in the memory section. It is an object of the present invention to provide a recorded information correction method for an optical disc that enables continuous execution of a reproducing operation even if the recording information is erroneously written on the recording medium or recording on the recording information area is incorrect.

[0011]

In order to achieve the above-mentioned object, a recording information correction method for an optical disk according to the present invention is a method for recording an optical disk having a rewritable recording information area for recording position information of a data recording area. The end address of the data recording area is corrected by replacing the end address of the data recording area with the data recording area upper limit address on the basis of the result of determination as to whether the end address of the data recording area read from the information area is larger than the data recording area upper limit address. The end address of the data recording area is corrected by replacing the end address of the data recording area with the start address of the recording area based on a result of determination as to whether the end address of the data recording area is smaller than the start address of the data recording area. To do.

[0012]

For the illegal address that the end address of the data recording area read from the recording information area is larger than the upper limit address of the data recording area, the end address of the data recording area is set as the upper limit address of the data recording area. Replace and correct.

Alternatively, for the illegal address that the end address of the data recording area read from the recording information area is smaller than the start address of the data recording area, the end address of the data recording area is set to The start address of the data recording area is replaced and corrected.

[0014]

FIG. 1 is a block diagram of a magneto-optical disk drive apparatus for carrying out the optical disk recording information correction method according to the present invention, and FIG. 2 is an optical disk recording information correction method according to the present invention. 3 is a flow chart of an example. Hereinafter, the recording information correction method for an optical disc according to the present invention will be described with reference to the drawings.

When a magneto-optical disk 8 such as a mini disk (MD) is hung on the magneto-optical disk drive device 1, the pickup 6 is rotated by the U of the magneto-optical disk 8 in a rotating state.
The recording information data that has been read from the TOC area 7a (recording information area) is written in the recording information transfer memory unit 5.

Here, the illegal recording information data judging means 2 is
Data 5a accessed from the recording information transfer memory unit 5
Also, the presence / absence of unauthorized recording information data is determined with reference to each standard track address data 4a accessed from the reference data 4.

First, it is determined whether or not the end address of each track of the data recording area is larger than the upper limit address Z of the outermost track of the data recording area 7b (step S).
1), the end address of each track for user recording is
User recording area If it is larger than the upper limit address Z,
This is input to the correction means 3 as the illegal record information data 2a.

In response to the illegal recording information data 2a, the correcting means 3 composes the correction data 3a for correcting the end address of the corresponding track in the data recording area by replacing the end address of the corresponding track with the upper limit address Z of the data recording area.
Then, the recording information transfer memory unit 5 is corrected (step S2).

Further, the illegal recording information data judging means 2
However, it is determined whether the end address of each track in the data recording area is smaller than the start address of the track in the data recording area based on the data 5a accessed from the recording information transfer memory section 5 ( Step S
3) If the end address of each track of the data recording area is smaller than the start address of the track of the data recording area, this is input to the correction means 3 as the illegal recording information data 2a.

Upon receipt of the illegally recorded information data 2a, the correction means 3 composes the correction data 3a for correcting the end address of the data recording area with the start address of the data recording area, and records the correction data 3a. The information transfer memory unit 5 is corrected (step S
4).

The correction operation will be described based on the error data shown in FIG. 5. The illegal recording information data judging means 2 records data based on the data 5a accessed from the recording information transferring memory section 5. It is determined whether the end address of the area is larger than the data recording area upper limit address Z.

In this case, since the end address Φ of the user recorded music 4 is larger than the data recording area upper limit address Z, this is input to the correction means 3 as the illegal recording information data 2a.

In response to the illegal recording information data 2a, the correcting means 3 composes the correction data 3a for replacing the end address Φ of the music 4 of the data recording with the upper limit address Z of the data recording area, and by this correction data 3a. The recording information transfer memory unit 5 is corrected. As a result, as shown in FIG. 6, the end address of the music 4 of the data recording becomes Z. By this, the music 4 of the data recording is normally executed, and the normal stop after the reproduction becomes possible. As described above, the end address may be corrected to the final address number of the corresponding track standard by using the reference data 4 instead of Z.

Further, the illegal recording information data judging means 2
However, based on the data 5a accessed from the recording information transfer memory unit 5, the end address of the data recording area is
It is determined whether or not it is smaller than the start address of the data recording area, and the end address E of song 2 of the data recording is determined.
However, when it finds an error that is smaller than the start address F of the song 2 of the data recording, it inputs this to the correcting means 3 as the illegally recorded information data 2a.

Upon receipt of the illegally recorded information data 2a, the correction means 3 determines the end address of the music 2 of this data recording as
The correction data 3a to be replaced and corrected with the start address F of the block is organized, and the recording information transfer memory unit 5 is corrected by the correction data 3a.

As a result, as shown in FIG. 6, the end address of the second track of song 2 of the data recording becomes F. This means that in the actual reproduction, the reproduction without the actual reproduction of the second track is executed. Although there is substantially no reproduction of the second track, the operation is normally executed, so that an error stop does not occur and the apparatus can continue the reproduction without stopping it.

In the above, when the number of songs in the data recording area is within one track and the start address of the track is larger than the end address, the end address is corrected so as to match the start address, and there is no substantial reproduction. But the operation is executed normally.

In the above, the recording information transfer memory section 5
In addition to correcting the above, the recording information area 7a of the magneto-optical disk 8 can be rewritten based on these correction data.

In the above embodiment, the magneto-optical disk is used as an example of the recording medium. However, the recording medium is not limited to this, and any recording medium having a rewritable recording information area can be used. A correction method can be applied.

[0030]

As described above, in the recording information correction method for an optical disk according to the present invention, it is determined whether the end address of the data recording area read from the recording information area is larger than the data recording area upper limit address. Based on the above, the end address of the data recording area is replaced with the upper limit address of the data recording area and corrected, and further, based on the determination result of whether the end address of the data recording area is smaller than the start address of the data recording area. Since the end address of the data recording area is replaced with the start address of the data recording area for correction, the illegal address configuration can be eliminated.

As a result, the optical disk drive apparatus can continue the operation without stopping the reproducing operation even if there is an error in the address of the recorded information. Is effective for BGM reproduction and the like.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a magneto-optical disk drive device that implements a recording information correction method for an optical disk according to the present invention.

FIG. 2 is a flowchart of an embodiment of a recorded information correction method for an optical disc according to the present invention.

FIG. 3 is an explanatory diagram showing a position of an optical disc recording area.

FIG. 4 is an explanatory diagram showing normal recording information address recording.

FIG. 5 is an explanatory diagram showing recording information address recording when an error occurs.

FIG. 6 is an explanatory diagram showing recording information address recording after correction by the method of the present invention.

[Explanation of symbols]

 1 Magneto-optical disk drive device 2 Unauthorized recording information data judging means 3 Correcting means 4 Reference data 5 Recording information transfer memory section 6 Pickup 7a UTOC area (recording information area) 7b Data recording area 8 Magneto-optical disk (optical disk)

Claims (1)

[Claims] 1. An optical disc having a rewritable recording information area for recording position information of the data recording area, wherein the end address of the data recording area read from the recording information area is larger than the upper limit address of the data recording area. The end address of the data recording area is replaced with the upper limit address of the data recording area based on the determination result of whether or not it is corrected, and whether the end address of the data recording area is smaller than the start address of the data recording area. A method for correcting recorded information on an optical disc, wherein the end address of the data recording area is replaced with the start address of the recording area for correction based on the result of the determination.