Error control of sector address and optical disc

Details Error control of sector address and optical disc Error control of sector address and optical disc

G - Physics

11

B

352/32.1

G11B 20/12 (2006.01) G11B 7/004 (2006.01) G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 19/04 (2006.01) G11B 20/18 (2006.01) G11B 27/10 (2006.01) G11B 27/30 (2006.01)

Patent

CA 1263476

ABSTRACT OF THE DISCLOSURE An information recording and reproducing apparatus records and reproduces information in and from a recording medium including an information recording region divided into a plura- lity of sectors. In recording and reproducing information in and from the recording medium, each sector includes a sector address part formatted and a data recording part for recording data. A predetermined signal is overwritten in the address of a sector thereby making reproduction of the address impossible to prevent data from being recorded again by error in the sector containing data, while at the same time protecting the writing in the sec- tors. In data recording, on the other hand, the address signal from the recording medium is binary-coded at a different level to detect a sector of unstable address reproduction, so that a pre- determined signal is overwritten in the address of this sector to make subsequent reproduction of the address impossible, thus per- mitting recording only in the sectors of stable address repro- duction for stable data reproduction. Further, an optical disc having sectors of stable address reproduction alone detects a sector of unstable reproduction at the time of inspection, and overwrites a predetermined signal in the address part of the particular sector to make subsequent reproduction of the address impossible.

483650

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