Optical disk apparatus having improved recording capacity

Details Optical disk apparatus having improved recording capacity Optical disk apparatus having improved recording capacity

1990-09-21

1993-06-08

Psitos, Aristotelis

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 47, 369 32, 369 4426, G11B 700

Patent

active

052185907

ABSTRACT:
An optical disk apparatus comprises an information generating circuit for inserting a predetermined number of resync codes in information to be recorded to generate record information, an optical disk driver for recording the record information generated by the information generating circuit on a predetermined region on a recording medium, and for reproducing the record information, recorded on the predetermined region on the recording medium by the recording circuit, a control circuit for computing an error ratio of data read out from the recording medium to data to be written, a detecting circuit for detecting the resync codes in the information reproduced by the reproducing circuit, and a counter for counting the resync codes detected by the detector. The control circuit makes the record information record on an interchange region when the error ratio is equal to or greater than a predetermined value or when the error ratio is equal to or less than the predetermined value and the number of the resync codes is equal to or less than a predetermined value.

REFERENCES:
patent: 4455635 (1984-06-01), Dieterich
patent: 4734901 (1988-03-01), Murakami
patent: 4791622 (1988-12-01), Clay et al.
patent: 4937804 (1990-06-01), Ishihara
patent: 4986668 (1991-01-01), Fukushima et al.

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