CAV/CLV composite disk accessing method utilizing different acce

Details CAV/CLV composite disk accessing method utilizing different acce CAV/CLV composite disk accessing method utilizing different acce

1989-09-15

1992-08-04

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 54, 369 56, G11B 7085

Patent

active

051365600

ABSTRACT:
On a composite CAV/CLV disc, information signals and identification codes indicative of the time-base positions of the information signals are recorded in at least first and second, radially different regions in CAV and CLV formats. To play back the composite CAV/CLV disc, the present position of an information reading spot applied to the disc is detected as a present position code according to an identification code read from the disc, and a destination position to which the information reading spot is to be jumped is detected as a destination position code. Then, the number of tracks to be jumped which corresponds to the difference between the present position code and the destination position code is calculated according to different functions when both the present and destination positions are in one of the first and second regions only and in the other region only. The information reading spot is moved from the present position to the destination position over a distance depending on the calculated number of tracks.

REFERENCES:
patent: 4723235 (1988-02-01), Yasuda et al.
patent: 4835753 (1989-05-01), Yasuda
patent: 4882719 (1989-11-01), Kimura et al.
patent: 4887253 (1989-12-01), Tateishi
patent: 4926405 (1990-05-01), Hangai et al.
patent: 5010539 (1991-04-01), Terashima et al.

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