Sum signal processing device for an optical disk drive

Details Sum signal processing device for an optical disk drive Sum signal processing device for an optical disk drive

1990-05-17

1993-03-23

Chin, Tommy P.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 4435, 369 54, 369 58, 360 67, G11B 700

Patent

active

051970546

ABSTRACT:
A sum signal processing device for use in an optical disk drive for detecting a sum signal which is a groove-crossing signal used to detect a relative position of a beam spot for recording and reproducing information from a medium and the medium and a relative velocity in the radial direction of the medium. The device identifies a recorded portion on the basis of high-frequency components and, in the recorded portion, processes the high-frequency components to generate a groove-crossing signal, thereby detecting an accurate sum signal.

REFERENCES:
patent: 4689779 (1987-08-01), Hayashi et al.
patent: 4707817 (1987-11-01), Yoshio
patent: 4884259 (1989-11-01), Horikawa et al.
patent: 4953151 (1990-08-01), Imanaka
patent: 4989190 (1991-01-01), Kuroe et al.

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