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    • 33. 发明授权
    • Method and apparatus for protection of data carrying discs
    • 用于保护数据携带光盘的方法和装置
    • US07239584B2
    • 2007-07-03
    • US10382821
    • 2003-03-06
    • Richard A. A. Heylen
    • Richard A. A. Heylen
    • G11B5/09
    • G11B20/00123G11B7/0037G11B19/122G11B20/00086G11B20/00586G11B20/00601G11B20/0063G11B20/1217G11B27/3063G11B2020/1242G11B2020/1271G11B2220/2545
    • The method and apparatus described utilise the fact that CDs manufactured from the same master will have distinctive physical characteristics attributable to the physical manufacturing process of the master to distinguish counterfeit CDs from genuine discs. For a genuine disc, the relative angular orientation of specified sections of the recorded data are determined and recorded. The relative angular orientation of the same sections of data on a test disc are also determined. Where the relative angular orientations are the same it is concluded that the test disc derives from the same source as the genuine disc and is therefore bona fide. Where there is no correlation, the test disc may be identified as counterfeit. The relative angular orientations, or other physical characteristics of the discs, may be physically measured, or may be calculated from information gained by reading the data on the disc. The disclosed technique can also be used to copy protect discs.
    • 所描述的方法和装置利用这样的事实,即由相同主机制造的CD将具有归因于主机的物理制造过程的区别的物理特征,以将假冒的CD与真正的盘区分开。 对于真正的盘,确定并记录记录数据的指定部分的相对角度方向。 也确定了测试盘上的相同部分数据的相对角度取向。 在相对角度取向相同的情况下,得出结论,测试盘来自与原盘相同的来源,因此是真实的。 在没有相关性的地方,测试盘可能被认定为假冒。 可以物理地测量盘的相对角度取向或其他物理特性,或者可以通过读取盘上的数据获得的信息来计算。 所公开的技术也可用于复制保护盘。