Storage medium storing copy protection data in burst cutting area using the on-off keying modulation method
    39.
    发明授权
    Storage medium storing copy protection data in burst cutting area using the on-off keying modulation method 失效
    存储介质使用开关键控调制方式在突发切割区域中存储复制保护数据

    公开(公告)号:US07345979B2

    公开(公告)日:2008-03-18

    申请号:US10878555

    申请日:2004-06-29

    IPC分类号: G11B5/09

    摘要: 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.

    摘要翻译: 为了保护磁盘上的受版权保护的数据,提供了一种在盘上生成突发切割区域(BCA)以防止未经授权的复制的方法和装置,以及具有BCA的信息存储介质。 信息存储介质包括:用户数据记录区域; 以及通过使用开关键控(OOK)调制并记录控制信息的突发切割区域(BCA)。 根据该方法和装置,BCA数据调制之后的通道位通过在调制之前插入数据位而产生,使得不需要单独的调制表。 因此,BCA中的记录密度增加,并且通过使用起始模式,产生与数据可区分的同步模式,并且当数据恢复时可以用作锁相环(PLL)的信号。