JP3167002B2 - Optical disc recording information correction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to correction of recorded information on an optical disk, and more particularly, to the correction of 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 recording information correction method.

[0002]

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

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

[0006] Here, the song 1 has a start address A
Since the end address is B and the size of the address number is A <B, it is a normal address.

[0005] Also, the music 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. Furthermore, 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, music 3 is recorded on two tracks in the same manner as music 2, and the size of the address number is H <I <J <K, so that it is a normal address.

[0006] Then, the start address of the 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 piece must be smaller than the upper limit address Z of the outermost 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 its memory, and reads the contents. Data recording area 7b with the contents of the UTOC area 7a
Had been managed. Conventionally, as described above, the correct address of the contents of the UTOC area 7a as described above is not always recorded in the memory unit, and an incorrect address is mistakenly recorded in the memory unit. Sometimes. As an example of an illegal address, as shown in song 4 in FIG. 5, the end address is not the correct N but an address Ф larger than the upper limit address Z of the outermost track of the data recording area 7b, and also exceeds the lead-out area LO. It may be erroneously written to a non-existent address.

[0008] Alternatively, as in the case of song 2 in the figure, the end address may be erroneously written in place of the correct G and in the address E smaller than the start address M of the recording block.

If there is an illegal address as described above, the optical disk drive has a structure in which the reproduction operation is stopped with an error. Therefore, the operation is not continued, and the operation is in a so-called hang-up state, and is released. Operation is required, which is very inconvenient for the user. In addition, this results in an undesirable result particularly in BGM reproduction or the like in which a plurality of music pieces are continuously and continuously reproduced.

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

[0011]

According to the present invention, there is provided a method for correcting recording information of an optical disk, comprising the steps of: providing 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 read from the information area is corrected based on the determination result of whether or not the end address of the data recording area is larger than the upper limit address of the 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 start address of the recording area based on the determination result of whether or not the end address of the data recording area is smaller than the start address of the data recording area. I do.

[0012]

With respect to an illegal address where 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 to the upper limit address of the data recording area. Replace and correct.

Alternatively, for an illegal address in which 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 changed. The correction is made by replacing the start address of the data recording area.

[0014]

FIG. 1 is a block diagram of a magneto-optical disk drive which implements a method for correcting recorded information on an optical disk according to the present invention. FIG. 2 is a diagram showing an embodiment of the method for correcting recorded information on an optical disk according to the present invention. 5 is a flowchart of an example. Hereinafter, a method for correcting recorded information on an optical disc according to the present invention will be described with reference to both drawings.

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

Here, the illegally recorded information data determining means 2
Data 5a accessed from recording information transfer memory unit 5
In addition, the presence / absence of unauthorized recording information data is determined with reference to the standard track address data 4a accessed from the reference data 4.

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

In response to the illegally recorded information data 2a, the correction means 3 composes correction data 3a for replacing the end address of the corresponding track in the data recording area with the upper limit address Z in the data recording area, and composes the correction data 3a.
The recording information transfer memory section 5 is corrected by the operation (step S2).

Further, unauthorized recording information data determining means 2
Determines 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 in the data recording area is smaller than the start address of the track in the data recording area, this is input to the correcting means 3 as the illegal recording information data 2a.

Receiving the illegally recorded information data 2a, the correcting means 3 composes correction data 3a for correcting the replacement of the end address of the data recording area with the start address of the data recording area, and records the data by the correction data 3a. Correct the information transfer memory unit 5 (step S
4).

The correction operation will be described with reference to the error data shown in FIG. 5 described above. The unauthorized recording information data determining means 2 performs data recording based on the data 5a accessed from the recording information transfer memory unit 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 の of the user recorded music piece 4 is larger than the data recording area upper limit address Z, this is input to the correcting means 3 as the unauthorized recording information data 2a.

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

Further, unauthorized recording information data determining 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 the address is smaller than the start address of the data recording area.
However, if an error smaller than the start address F of the song 2 of the data recording is found, the error is input to the correction means 3 as the unauthorized recording information data 2a.

In response to the illegally recorded information data 2a, the correcting means 3 sets the end address of the music piece 2 of this data recording to
The correction data 3a to be replaced and corrected by 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 the tune 2 of the data recording is F. This means that in actual reproduction, reproduction without substantial reproduction of the second track is executed. Although there is no substantial reproduction of the second track, since the operation is performed normally, no error stop or the like occurs, and the apparatus can continue reproduction without stopping.

In the above, when the track 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 substantially no reproduction is performed. However, the operation is executed normally.

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

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

[0030]

As described above, according to the recording information correcting 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 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, and further corrected based on the determination result as to whether the end address of the data recording area is smaller than the start address of the data recording area. Since the correction is performed by replacing the end address of the data recording area with the start address of the data recording area, an illegal address configuration can be eliminated.

This enables the optical disk drive to continue the operation without stopping the reproduction operation even if there is an error in the address of the recorded information. This is effective for BGM reproduction and the like.

[Brief description of the drawings]

FIG. 1 is a block diagram of a magneto-optical disk drive that implements a method for correcting recorded information on an optical disk according to the present invention.

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

FIG. 3 is an explanatory diagram showing a position of an optical disk 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]

 DESCRIPTION OF SYMBOLS 1 Magneto-optical disk drive 2 Unauthorized recording information data determination means 3 Correction 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)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification code FI G11B 27/10 A (58) Investigated field (Int.Cl. ⁷ , DB name) G11B 27/10 G11B 7/00 G11B 19 / 02 501 G11B 20/10 G11B 20/12

Claims (1)

(57) [Claims] 1. An optical disc having a rewritable recording information area for recording position information and the like of a data recording area, wherein an end address of the data recording area read from the recording information area is larger than an 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 the correction is made, and whether the end address of the data recording area is smaller than the start address of the data recording area is determined. And correcting the end address of the data recording area with the start address of the recording area based on the determination result.