Storage medium storing copy protection data in burst cutting area using the on-off keying modulation method
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United States of America Patent
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Mar 18, 2008
Grant Date -
Mar 3, 2005
app pub date -
Jun 29, 2004
filing date -
Aug 25, 2003
priority date (Note) -
Expired
status (Latency Note)
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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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