Record carrier having a servo track with non-modulated parts...

Details Record carrier having a servo track with non-modulated parts... Record carrier having a servo track with non-modulated parts...

2006-08-01

2006-08-01

Psitos, Aristotelis M. (Department: 2656)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S059200, C369S275300

Reexamination Certificate

active

07085209

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) having a periodic variation of a physical parameter at a first frequency and modulated parts for encoding record carrier information. The modulated parts have a bit synchronization element constituted by a phase modulation of the periodic variation and a data part having data bits of the record carrier information encoded by direct digital modulation. Alternatively, the modulated parts include a second frequency, which is substantially different from the first frequency, for encoding data bits of the record carrier information, the second frequency being a integral multiple N of the first frequency. A recording and/or playback device has a device for recording/reading the information blocks and for reading the record carrier information.

REFERENCES:
patent: 4901300 (1990-02-01), Van Der Zande et al.
patent: 4999825 (1991-03-01), Raaymakers et al.
patent: 5237552 (1993-08-01), Masood et al.
patent: 5553043 (1996-09-01), Yamaguchi et al.
patent: 5642345 (1997-06-01), Kurebayashi et al.
patent: 6445656 (2002-09-01), Koide
patent: 6678226 (2004-01-01), Horibata et al.
patent: 6690640 (2004-02-01), Van Den Enden
patent: 0326206 (1989-08-01), None
patent: 11-203680 (1999-07-01), None
patent: WO0043996 (2000-07-01), None
MAT (machine assisted translation) of JP 11-203680.

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