Recording/reproducing apparatus and recording/reproducing...

Details Recording/reproducing apparatus and recording/reproducing... Recording/reproducing apparatus and recording/reproducing...

2006-06-06

2006-06-06

Korzuch, William (Department: 2653)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S047480, C369S053340, C369S059110

Reexamination Certificate

active

07057985

ABSTRACT:
A recording/reproducing apparatus and method are provided to record and reproduce data on and from a disk-shaped recording medium that has an address data area with embossed pits and a recording/reproducing area with a wobbling spiral groove. A wobble-signal processing circuit is used to extract a wobble signal from the signal the head obtains from the wobbling spiral groove and to provide the wobble signal to a PLL circuit to produce a sync signal therefrom. A pulse is produced at least during a wobble signal disturbance period occurring when switching between at least one of a recording and reproducing operation and provided to the PLL circuit in order to provide an unchanging sync signal during the wobble signal disturbance period to avoid the wobble disturbances from being carried over to the sync signal.

REFERENCES:
patent: 5682365 (1997-10-01), Carasso et al.
patent: 6069870 (2000-05-01), Maeda et al.
patent: 6172952 (2001-01-01), Inokuchi et al.
patent: 6219318 (2001-04-01), Andoh
patent: 6333902 (2001-12-01), Shim

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