Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Initialization or start-up mode or changing system mode
Reexamination Certificate
2005-09-20
2005-09-20
Psitos, A M (Department: 2653)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Initialization or start-up mode or changing system mode
C369S030240
Reexamination Certificate
active
06947364
ABSTRACT:
In use of an optical disk such as a Digital Versatile Disk (DVD) it is sometimes desirable to detect if a track jump occurs as quickly as possible after the occurrence. The optical disk format includes a pre-groove track structure which provides the frame work upon which data can be written to and read from the disk. The structure of the pre-groove track is utilized to detect the possible occurrence of an inadvertent track jump as soon as possible and in a time shorter than would be required to detect the track jump using only disk addressing data. The pre-groove track structure may be modified to enhance track jump detection, such as by positional codes in data line Segments of the track, or revolving coding schemes for the addressing data dibits.
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ECMA/TC31/99/7 ∴ 120mm ReWritable DVD(DVD+RW), cover pg, iii, 30, Feb. 1999.
Hogan Josh
Weirauch Charles Robert
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