Cross-talk removal apparatus and data reproduction apparatus

Details Cross-talk removal apparatus and data reproduction apparatus Cross-talk removal apparatus and data reproduction apparatus

2006-05-23

2006-05-23

Young, W. R. (Department: 2651)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S053330

Reexamination Certificate

active

07050371

ABSTRACT:
A pick up irradiates light beams at specified intervals in the tangential direction of the main track to be reproduced and both of adjacent tracks on a disk10on which tracks are formed. A CTC unit15uses the delay amount Δd of the respective sample-value series corresponding to the reproduction signal RFm from the main track and reproduction signals RF1, RF2from both adjacent tracks to correct the delay, then outputs a CTC output signal from which the cross-talk component has been removed. In addition, when adjusting the delay, the CPU17applies a disturbance to the control signal for the actuator of the servo-control unit18and changes the delay amount Δd within a specified range of change. At this time, the CPU17sets the delay amount Δd, which minimizes the jitter value found by the jitter detection unit16according to the CTC output signal, for the CTC unit15. This makes it possible to set the optimum delay amount Δd when adjusting the delay, even when there is little steady cross-talk.

REFERENCES:
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patent: 6330213 (2001-12-01), Ishibashi et al.
patent: 6442114 (2002-08-01), Ishibashi et al.
patent: 6680891 (2004-01-01), Kim et al.
patent: 6738326 (2004-05-01), Ishibashi et al.
patent: 2000-173061 (2000-06-01), None

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