Sector mark pattern detection for optical data disk controller

Details Sector mark pattern detection for optical data disk controller Sector mark pattern detection for optical data disk controller

1994-06-01

1995-08-22

Sugarman, Scott J.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 54, 360 381, G11B 1928

Patent

active

054446856

ABSTRACT:
In a normal sector mark detection routine, using a wide open search window bits read from an optical data disk are searched for the presence of a sector mark pattern. Following detection of the pattern, using a search window of programmable width, a predefined region of the next sector is searched to locate a sector mark pattern. If the pattern is found, a sector mark found signal is generated. If the pattern is not found, a pseudo sector mark signal is generated. This sequence is repeated until either a subsequent sector mark pattern is detected, a predetermined number of pseudo sector mark signals generated or an exit command is received. Data is read from a sector in response to a sector mark found signal or pseudo sector mark signal. In a constant sector mark mode, the disk is searched, with the window wide open. Sector mark patterns are detected continuously to carry out media certification.

REFERENCES:
patent: 4603411 (1986-07-01), Sugiyama et al.
patent: 4620300 (1986-10-01), Ogawa
patent: 4663752 (1987-05-01), Kakuse et al.
patent: 4805046 (1989-02-01), Kuroki et al.
patent: 5047877 (1991-09-01), Herting
patent: 5050013 (1991-09-01), Holsinger

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