Optical information recording and reproducing system using optic

Details Optical information recording and reproducing system using optic Optical information recording and reproducing system using optic

1987-12-07

1990-08-14

Canney, Vincent P.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

G11B 2736

Patent

active

049493264

ABSTRACT:
In a read only type optical disk and a write type optical disk each thereof having a data recording area and a spare area, first encoded data for error detection and correction are recorded in the data recording area. In the case of the read only type optical disk, the spare area is used as a check sector in which second encoded data are recorded. When error correction by first error control means becomes impossible while sectors in the data recording area are reproduced, second error control means performs error correction by using the check sector corresponding to an associated error sector. In the case of the write type optical disk, the spare area is used as an alternate sector. A defective sector detected by defective sector detecting means is alternately recorded by being replaced by the alternate sector through sector alternating means.

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AFIPS Conference Proceedings, National Computer Conference, Houston, Tex., 7th-20th Jun. 1982, pp. 13-17.

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