Method of accessing information stored in predetermined data...

Details Method of accessing information stored in predetermined data... Method of accessing information stored in predetermined data...

2007-06-28

2011-10-25

Klimowicz, Will J (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

Reexamination Certificate

active

08045434

ABSTRACT:
A method of accessing an optical disc is disclosed. The method includes: enabling a focus servo control without enabling a tracking servo control, and then moving an optical pick-up unit in a radial direction of the optical disc; obtaining at least a first reference signal and a second reference signal according to a laser beam reflected from the optical disc when the optical pick-up unit is moving in the radial direction; and monitoring at least the first reference signal and the second reference signal to identify a boundary of a predetermined data area on the optical disc.

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Yu et al., Title of Invention: Methods Applied to Optical Storage Medium for Identifying Boundary Between Areas Storing Information With Different Characteristics, U.S. Appl. No. 12/037,092, filed Feb. 26, 2008.

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