Recording disk and recording apparatus having a copy...

Details Recording disk and recording apparatus having a copy... Recording disk and recording apparatus having a copy...

2005-11-15

2005-11-15

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053320, C369S275300

Reexamination Certificate

active

06965551

ABSTRACT:
A recording disk and a recording apparatus prevent illegal copying. In a reproduction control data area, pits of a pit train on a plurality of adjacent tracks are aligned in the directions which cross the tracks perpendicularly, wherein the pit train represents reproduction control data indicative of a reproduction control method to be used for reproducing information data. The length of a unit interval on the track corresponding to one bit of the reproduction control data is made shorter than a length that is twice as long as a length of rotation jitter which is generated when a spindle motor is rotated under a rotation control method using a frequency generator.

REFERENCES:
patent: 5043965 (1991-08-01), Iida et al.
patent: 0 643 391 (1995-03-01), None
patent: 0 813 189 (1997-12-01), None
patent: 2001 - 76345 (2001-03-01), None
patent: WO98/18121 (1998-04-01), None
patent: WO99/10884 (1999-03-01), None

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