Record carrier having a servo track with position...

Details Record carrier having a servo track with position... Record carrier having a servo track with position...

2006-09-19

2006-09-19

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S275300, C369S275400

Reexamination Certificate

active

07110332

ABSTRACT:
A record carrier (1) has a servo track (4) indicating an information track (9) intended for recording information blocks. The servo track (4) has a periodic variation of a physical parameter at a predetermined frequency, usually called wobble. The servo track has modulated parts for encoding position information according to a predetermined type of modulation. The record carrier includes a management area in which the servo track includes permanent data. The permanent data is encoded using a different type of modulation, but using the variations of the same physical parameter. Direct digital modulation (41) is proposed for the different type of modulation.

REFERENCES:
patent: 5835478 (1998-11-01), Kobayashi et al.
patent: 5930210 (1999-07-01), Timmermans et al.
patent: 6122739 (2000-09-01), Kutaragi et al.
patent: 6538982 (2003-03-01), Van Vlerken et al.
patent: 6765861 (2004-07-01), Van Vlerken et al.
patent: 6996042 (2006-02-01), Kobayashi
patent: 2001/0005357 (2001-06-01), Ha et al.
patent: 0723216 (1996-07-01), None
patent: WO0219332 (2002-07-01), None

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