Sector mark detecting apparatus in optical disc apparatus

Details Sector mark detecting apparatus in optical disc apparatus Sector mark detecting apparatus in optical disc apparatus

1989-04-27

1992-01-21

McElheny, Jr., Donald

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

G11B 700

Patent

active

050833030

ABSTRACT:
Based on an output signal of a sector mark reading circuit reading a sector mark signal representing a sector mark area, the interval in which the next sector mark signal is to be detected is anticipated, and a quasi-sector mark is generated at a time when the next sector mark is to be detected in each sector. Even if the sector mark reading fails, the sector mark will be able to be output at an accurate timing. Also, if the read sector mark signal, which is mis-detected or not, is determined, a highly reliable sector mark signal may be produced.

REFERENCES:
patent: 4409627 (1983-10-01), Eto et al.
patent: 4420775 (1983-12-01), Yamazaki et al.
patent: 4518996 (1985-05-01), Reitmeier et al.
patent: 4663752 (1987-05-01), Kakuse et al.
patent: 4669075 (1987-05-01), Abe
patent: 4733312 (1988-03-01), Morimoto
patent: 4769704 (1988-09-01), Hirai et al.

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