Optical information accessing system capable of reliable jump-ba

Details Optical information accessing system capable of reliable jump-ba Optical information accessing system capable of reliable jump-ba

1995-02-24

1997-04-01

Hindi, Nabil

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 4432, G11B 700

Patent

active

056173822

ABSTRACT:
In an optical information accessing system for an optical disc including a plurality of tracks forming one helix, a counter counts sectors, and a comparator compares a value of the counter with a predetermined value. When the value of the counter reaches the predetermined value, a coincidence signal is generated from the comparator. A gate circuit passes the coincidence signal as a jump-back signal. When data processing upon the optical disc is abnormally interrupted and the coincidence signal is generated, the predetermined value is switched from a first value to a second value larger than the first value.

REFERENCES:
patent: 4525840 (1985-06-01), Heinz et al.
patent: 4910722 (1990-03-01), Kaji et al.
patent: 5220545 (1993-06-01), Tomimitsu
patent: 5485441 (1996-01-01), Maeda

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