Record carrier having an improved modulated servo track for...

Details Record carrier having an improved modulated servo track for... Record carrier having an improved modulated servo track for...

2006-05-16

2006-05-16

Nguyen, Hoa T. (Department: 2656)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S275300

Reexamination Certificate

active

07046596

ABSTRACT:
A record carrier (1) has a servo track (4) indicating an information track (9) intended for recording information blocks represented by marks. The servo track (4) has a periodic variation of a physical parameter at a predetermined frequency and modulated parts for encoding position information at regular intervals. The modulated parts start with a bit sync element and are of a data type having a data bit element or of a word sync type having a word sync element. The bit sync element and the data bit element are modulated according to a same predetermined type of modulation of the periodic variation. The modulated parts further include modulated parts (40, 41) of an isolated bit sync type only having the bit sync element.

REFERENCES:
patent: 6538982 (2003-03-01), Van Vlerken et al.
patent: 6580684 (2003-06-01), Miyake et al.
patent: 6765861 (2004-07-01), Van Vlerken et al.
patent: 2003/0165095 (2003-09-01), Iimura et al.
patent: WO 00/43996 (2000-07-01), None

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