Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1994-03-25
1996-09-03
Epps, Georgia Y.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 47, G11B 390
Patent
active
055530451
DESCRIPTION:
BRIEF SUMMARY
This application is a Rule 371 of PCT/JP93/01072, filed Jul. 30, 19
TECHNICAL FIELD
The present invention relates to a disc recording apparatus for recording a data on a disc such as a magneto-optical disc, an optical disc or the like and a recording method thereof.
BACKGROUND ART
Various kinds of disc recording apparatus for recording a data such as an audio data or the like on a magneto-optical disc and an optical disc have been put into practice in the prior art. When data are recorded on such disc, the data are successively recorded in tracks previously formed on the disc in a spiral or concentric fashion.
By the way, because of a scratch of a disc surface or the like, a disc such as the magneto-optical disc, the optical disc or the like sometimes has a defective portion at a predetermined portion of a track in which a data is recorded. In such case, even if the data is recorded at the defective portion, then an accurate reproduction thereof is difficult. If an audio signal, for example, is recorded, there is then such a fear that when the defective portion is reproduced, a reproduced sound breaks off and a noise is reproduced.
If the defective portion of the track is a very short section, then an original recorded data can be restored by an error correction and an interpolation processing of a reproduced data or the like, while if the defective portion is continued for a certain long section, then such restoration processing is difficult.
DISCLOSURE OF THE INVENTION
The present invention is made in view of such problems, and an object thereof is to provide a disc recording apparatus and a disc recording method in which a data can be recorded so that the data can be continuously reproduced even if a predetermined section of the track formed on a disc is a defective section.
According to a first invention, in a recording apparatus for recording a predetermined data on a disc in which clusters which are divided at a predetermined section are formed on a track, there are provided a memory means for once storing a data, a discriminating means for discriminating whether or not the above-mentioned cluster is a defective section, and a controlling means for performing such control that if the above-mentioned discriminating means discriminates that the cluster under recording is defective, then the recording is once stopped and a cluster offset by a predetermined cluster is calculated from the above-mentioned defective cluster and a data is read again from the above-mentioned memory means to begin the recording again from the above-mentioned calculated cluster. Therefore, if a cluster having a defective section is detected in a track formed on a disc, then the cluster having the defect is avoided and the data is accurately recorded, so that the recorded data can be accurately reproduced upon reproduction.
According to a second invention, a program recorded by the above-mentioned recording apparatus is formed of one or a plurality of parts. The above-mentioned disc has a managing information area in which a managing information formed of at least a start address, an end address and a link information corresponding to each of the above-mentioned parts is recorded. If the cluster under recording is determined as a defective one, then control is performed in such a manner that an end of a cluster preceding the above-mentioned cluster determined as the defective one is defined as an end address and is registered as the first part in the above-mentioned managing information area and the cluster offset by a predetermined cluster is calculated from the above-mentioned cluster determined as the defective one, the end of the above-mentioned calculated cluster is defined as a start address and registered as the second part in the above-mentioned managing information area, and a link information of the first part indicates the above-mentioned second part. Therefore, by a recorded information in the managing information area of the disc, the cluster having the defective section is avoided and it can be easily cont
REFERENCES:
patent: 5353276 (1994-10-01), Schroder
Epps Georgia Y.
Huber P. W.
Sony Corporation
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