Servo error detecting method of an optical disc system

Details Servo error detecting method of an optical disc system Servo error detecting method of an optical disc system

1989-03-14

1992-11-03

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4434, 369 4426, G11B 7095

Patent

active

051611368

ABSTRACT:
An optical disc system includes an optical disc which is formatted to store data in sectors. A tracking error signal is monitored and if the tracking error signal exceeds a predetermined threshold level, the address information of a next sector following a target sector in which data is to be recorded or from which data is to be read out is read out. And, if the address information thus read out has been found to indicate an address which is consecutive to the address of the target sector, the occurrence of a tracking error is determined. On the other hand, if the address information thus read out has been found to indicate an address which is not consecutive to the address of the target sector, then the writing (recording) operation is terminated so as to prevent overwriting of data in an undesired sector.

REFERENCES:
patent: 4428075 (1984-01-01), Hazel
patent: 4488278 (1984-12-01), Dieterich
patent: 4611315 (1986-09-01), Ogino
patent: 4866687 (1989-09-01), Kasai et al.
patent: 4872152 (1989-10-01), Tsuyoshi et al.
patent: 4884259 (1989-11-01), Horikawa et al.
patent: 4967403 (1990-10-01), Ogawa et al.

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