JPH04212719A - Optical information recording method - Google Patents

Abstract

PURPOSE:To surely correct writing which gets out of a track by inspecting or correcting all the information of the track which has possibility that hindrance occurs in recording and reproducing information by erroneous recording based on the information already held. CONSTITUTION:It is assumed that dust 7 adheres to the information tracks T3 and T4 and a guide track 64. Therefore, not only the information written on the track T3 where the information has been written but also the information written on the track T2 where the information has been erroneously written are ruptured, so that the information can not be accurately read. A track guide 63 where a recording bit 5 is written does not function appropriately. Then, read-in inspection is performed to the information tracks T1 and T2, and when abnormality is discovered, the information is anew written together with the information written in the track T3 out of the information already held on and after the track 4. Thus, the information is appropriately recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for optically recording information on an additional recording type information recording medium having an information track.

0002

2. Description of the Related Art Conventionally used optical cards and other recordable information recording media are provided with mutually adjacent information tracks that can be optically detected, and one information track. is divided into small sections in the track direction to form one or more sectors. When recording or reproducing information, one sector is the minimum unit of information, and each time the information writing operation for one sector or one track is completed, the previously written one sector or one track is played back. Inspection (verification) is being carried out. At this time, if some problem is detected in the information that was supposed to be recorded, or if some error occurs during the writing operation.
If this occurs, the same information is written (retried) to the next unused sector or the next unused track.

By the way, in a method such as an optical card, in which information is recorded by optically recognizing the position of an information track and causing a physical change to the recording medium, the recording medium changes during the information writing operation. Due to surface scratches, dust, etc., information may be written off the intended information track and erroneously written on a track guide having positioning information of the information track or on an adjacent track that has already been recorded. Track guides and information tracks on which such information has been written will lose their original function, and the information recorded on other information tracks will also be destroyed. . In order to prevent the destruction of recorded information due to such writing of erroneous information, Japanese Patent Application Laid-Open No. 1-201831 discloses a method of detecting track off during a write operation and immediately stopping the write operation after detection. Proposed.

0004

[Problems to be Solved by the Invention] Among the above-mentioned conventional writing methods, the writing method in which a retry is performed if any inconvenience occurs after verifying the previous stage has the problem that an error may occur during the writing operation regarding the information to be written. Reliable recording can be performed by performing a retry through verification, but since no verification is performed on the information on tracks adjacent to the track that has been confirmed to have been recorded, corrupted information is left as is. There is also a problem.

[0005] In this regard, it is possible to detect a defective part due to information destruction by verifying the whole thing again after recording all the information, and to replace the information in the defective part. - Under an information management method that is based on sequential recording, there is a problem in that when information is replaced, the physical information arrangement is no longer sequential, resulting in a decrease in information management efficiency. Furthermore, there was no guarantee that the destroyed information could be reliably restored, and there was also a problem in terms of the reliability of the information.

On the other hand, among the above-mentioned conventional methods, the method of immediately stopping the write operation when a track-off in the subsequent stage is detected causes a delay in detecting the track-off or failure to detect the track-off if the track-off occurs suddenly. A situation such as this occurs, and there is a problem that writing is performed outside the target track.

The present invention was proposed to solve the above-mentioned problems, and it is possible to properly record information even if the information is written off the target track while recording the information on the recording medium. The purpose is to provide an optical information recording method.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of information recording bands close to each other,
In an optical information recording method for an additional recording type information recording medium having a positioning information area for recording and reproducing operations with respect to the information recording band, after information is recorded in a specific information recording band, the information recording band is If there is a possibility of erroneous recording outside, all information in the information recording band where the erroneous recording may interfere with the recording and playback of information should be inspected or corrected based on the information already held. This is an optical information recording and reproducing method. Furthermore, in an optical information recording method for an additional recording type information recording medium that has a plurality of information recording bands close to each other and a positioning information area for recording and reproducing operations with respect to the information recording bands, information may be lost due to erroneous recording. After reproducing and temporarily storing all the information in the information recording band that may interfere with recording and playback, information is recorded in a specific information recording band, and then there is a possibility of erroneous recording outside the information recording band. If a problem occurs, all the information in the information recording band where the recording/reproduction of information may be hindered due to erroneous recording is inspected or corrected based on the temporarily stored information. This is a method.

[0009]

[Operation] With this structure, information can be reliably corrected after writing, there is no need to perform the entire verification process again after writing a series of information, and the physical recording arrangement of the information can be changed. Can be kept sequential.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram of an optical card 1 which is a recording medium used in the present invention. As shown in Figure A, an optical recording material 2 for optically recording information is formed on the surface of an optical card 1. As shown in the enlarged view in Figure B, the optical recording material 2 has a plurality of track guides 3 formed at approximately equal intervals in the longitudinal direction of the optical card 1, and a plurality of pieces of information with the track guides 3 as boundaries. Tracks 4a to 4d are formed adjacent to each other. And this information track 4a~
4d, recording pits 5 are written as shown in the figure. In the normal writing operation, the recording pit 5 is written approximately at the center of the target information track while optically detecting the track guide 3 of the information track on both sides of the target write track or more than one track away from the target write track. I am going. Figure C shows a state in which the recording light beam 6a is on the information track 4b and the track guide 3 detection light beam 6b is on the track guide 3.

FIG. 2 shows a case where an off-track occurs while writing information to the optical card 1. To explain in detail, when writing information to the target information track, one
Track guides on the outside of the track shall be used. Information tracks T0 to T2 have already been written and verified, and information tracks T4 and subsequent ones are left unused. Information tracks T3, T4 and guide track G4
Assume that dust 7 is attached to the top. Although information is being written on the information track T3, the track guides G2 and G5 are being detected at the same time. Therefore, the detection error of the track guide occurs due to the influence of the dust 7, and the writing position of the recording pit 5 deviates greatly as shown in the figure, resulting in the recording pit 5 being written on the track guide G3 and the information track T2. ing.

[0012] For this reason, not only the information track T3 that was being written to but also the information that had already been written in the information track T2 to which it was written by mistake is destroyed, and it is no longer possible to read the information correctly. Also, the track guide G3 in which the recording pit 5 has been written,
It is no longer able to perform its proper function as a track guide. Therefore, if this is used as a track guide, it will again cause the track to go off track. In this case, conventionally, the information track T3 was considered to be a defective track after verification, and the information that was intended to be written to the information track T3 was retried to the unused tracks after the information track T4, so the information in the information track T2 was destroyed. It had been left in the same condition it was left in.

In the above case, the present invention uses the following information recording method. This will be explained with reference to the flowchart according to the first embodiment shown in FIG.
represents the information track to be written, n represents the information content to be written, Dn represents the information content of the n-th information track, and Dn-2 and Dn-1 represent the written information immediately before Dn.

First, when writing is to be performed at T3 (Dn) in FIG. 2, it is assumed that a track off occurs here, and an information track that is likely to destroy information is estimated. In this case, the recording pit 5 is the information track T2 (
Although it is impossible to detect at this point which side of the information track Dn-1) or the information track T4 the erroneous writing was performed, there is a possibility that the erroneous writing may be performed on either of the information tracks. Also, the track guides that may be written off the track are G3,
G4, information tracks that use both as track guides include T1 (Dn-1) and T2 (Dn-1).
n-1), T4, and T5. Next, writing is performed on the information track T3 (Dn), but during the writing operation, the detection means detects that off-track writing has been performed. Then, information track T1 (Dn-2) and information track T2 (Dn-1
) is read and inspected, and if an abnormality is found, the already held information is rewritten to the unused tracks after the information track T4 along with the information to be written to the target information track T3. Of course, if no abnormality is found when reading and inspecting the information track, the information will be written to the next unused track.

The method according to the second embodiment shown in FIG. 4 includes information tracks T1 (Dn-2), T2 (Dn-1), T4,
Four tracks T5 are read at this point, and the information on the information tracks T1 and T2 on which information is actually recorded is temporarily read and stored.

Next, writing is performed on the information track T3 (Dn), but during the writing operation, the detection means detects that off-track writing has been performed. Then, the information track T1 (Dn-2) and the information track T2 (Dn-1) are read and inspected, and if an abnormality is found, the temporarily stored information should be written to the target information track T3 (Dn). At the same time, new writing is performed on unused tracks after the information track T4. Of course, if no abnormality is found when reading and inspecting the information track, the information will be written to the next unused track.

In this way, by the method according to the first embodiment shown in FIG. 3 and the method according to the second embodiment shown in FIG. 4, conventionally information was left in a destroyed state. Information on the information track can be recorded reliably. Furthermore, when writing information anew to an unused track, the information is written in the original order of the information, and the physical track arrangement of the information is changed to a sequential one, just as it was before the off-track writing. It can be done.

In the second embodiment shown in FIG. 4, each time one track is written, the information of the two tracks before and after is read in advance and temporarily stored in the storage means.
As shown in the embodiment shown in FIG. 1, there are information tracks on which information is already stored, information tracks that are obviously unused tracks, information tracks that can be easily restored without reading the recorded information, and recorded contents that can be restored. Needless to say, there is no need to read unnecessary information tracks and the like.

Further, in each of the embodiments described above, after a track off occurs, new writing is started from the unused track next to the information track where the track off occurred, but this unused track is also affected by the writing due to the track off. may be influenced by. Even if writing is performed on this unused track, it is fully estimated that there is a possibility that the track will go off the track in the same way as the information track that has gone off the track.

[0020] Therefore, by applying the information destruction estimation performed for the information track on which writing has been completed to the unused track, the reliability of information recording can be reduced without actually writing. It is possible to infer which trucks are likely to be present. Therefore, in order to ensure the reliability of recorded information and to avoid unnecessary writing and verifying operations, it is better not to use the information track whose reliability has deteriorated.

For example, in FIG. 2, the information track T4
Among the subsequent unused tracks, there is a possibility that off-track writing may be performed on the information track T4 and on the track guides G3 and G4. Therefore, since the information tracks to be written while detecting the track guides G3 and G4 are T4 and T5, it is better to write new information to the unused track after the information track T6 in order to ensure reliability. become.

[0022]

[Effects of the Invention] As described above, according to the present invention, even if information that has already been recorded is destroyed due to off-track information being written, the information that has already been retained or the information that has been destroyed will be destroyed. Based on the information read and stored in the tracks near the track, it is possible to reliably correct the information after writing, and after writing all the information, including the information written before. Information is properly recorded. For this reason,
There is no need to perform the entire verification process again after writing a series of information, and the physical recording arrangement of the information can be maintained sequentially.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram and partially enlarged view of an optical card used in the present invention.

FIG. 2 is a partially enlarged view showing a state of writing on an optical card.

[Fig. 3] Flowchart according to the first embodiment of the information recording method
It is.

[Fig. 4] Flowchart according to the second embodiment of the information recording method
It is.

Claims (2)

[Claims] Claim 1. A method for optically recording information on an additional recording type information recording medium having a plurality of information recording bands close to each other and a positioning information area for recording and reproducing operations for the information recording bands, comprising: If there is a possibility that erroneous recording outside the information recording band occurs after information has been recorded in the information recording band, all information recording bands that may interfere with the recording and playback of information due to the erroneous recording will be recorded. An optical information recording and reproducing method characterized in that information is inspected or corrected based on already held information. 2. In an optical information recording method on an additional recording type information recording medium having a plurality of information recording bands close to each other and a positioning information area for recording and reproducing operations with respect to the information recording bands, After reproducing and temporarily storing all the information in the information recording band that may interfere with the recording and reproducing of information due to recording, information is recorded in a specific information recording band, and then erroneous data outside the information recording band is recorded. If there is a possibility of recording, all information in the information recording band where there is a possibility of erroneous recording hindering the recording and reproduction of information is inspected or corrected based on the temporarily stored information. An optical information recording method characterized by: