Disk reproduction device

Details Disk reproduction device Disk reproduction device

2007-07-10

2007-07-10

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S059190

Reexamination Certificate

active

10432638

ABSTRACT:
The invention provides a disk playback device wherein a disk (1) is irradiated with a laser beam from an optical head (4) to reproduce signals from the disk, and which comprises an external synchronizing signal producing circuit (8) and a delay circuit (12) for producing a reproduction synchronizing signal providing reference timing at which a reproduced signal is detected by reading an output signal from the optical head (4), a circuit (7) for detecting the reproduced signal by reading the output signal from the optical head (4) based on the reproduction synchronizing signal, and a system controller (10) for determining an optimum phase for a normal reproduction operation by altering the phase of the reproduction synchronizing signal and executing a reproduction operation, the controller (10) being operable to make a phase adjustment for the reproduction synchronizing signal prepared by the delay circuit (12). A normal reproduction operation can be performed at all times by assuring the reproduction synchronizing signal of the optimum phase.

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Japanese Patent Office Communication for corresponding Japanese Patent Application dated Feb. 22, 2005.

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