Access method, information recording and reproducing...

Details Access method, information recording and reproducing... Access method, information recording and reproducing...

2005-12-14

2009-06-09

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

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

Mechanism control by the control signal

C369S047430, C369S047450

Reexamination Certificate

active

07545713

ABSTRACT:
An access method for use when switching from recording into an optical disk to reproduction from the optical disk or vice versa is disclosed that comprises a step of calculating a rotating speed n2of a motor for rotating the optical disk given that linear velocities in a first access position before the switching and a second access position after the switching are equal, a step of determining whether n2satisfies a pair of expressions n2>n0and n2>n1or a pair of expressions n2<n0and n2<n1where n0and n1are rotating speeds of the motor before and after the switching, a step of changing a control mode from CLV to CAV and the rotating speed from n0to n1if one of the pairs of expressions is satisfied, and a step of shifting a position to be accessed from the first access position to the second access position.

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