Storage medium storing copy protection data in burst cutting...

Details Storage medium storing copy protection data in burst cutting... Storage medium storing copy protection data in burst cutting...

2008-03-18

2008-03-18

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Format arrangement processing for auxiliary information

Reexamination Certificate

active

07345979

ABSTRACT:
In order to protect copyrighted data on a disk, a method and apparatus for generating a burst cutting area (BCA) on a disk to prevent unauthorized copy, and an information storage medium having a BCA are provided. The information storage medium comprises: a user data recording area; and a burst cutting area (BCA) on which control information is modulated by using on-off keying (OOK) modulation and recorded. According to the method and apparatus, channel bits after BCA data modulation are generated by inserting a start pattern to data bits before modulation such that a separate modulation table is not needed. Accordingly, the recording density in the BCA increases and by using the start pattern, a sync pattern distinguishable from data is generated and can be used as a signal for a phase locked loop (PLL) when data is restored.

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