Method and apparatus for embedding second code into optical disc data by data modulation rule variation
    1.
    发明授权
    Method and apparatus for embedding second code into optical disc data by data modulation rule variation 有权
    通过数据调制规则变化将第二代码嵌入光盘数据的方法和装置

    公开(公告)号:US07928865B2

    公开(公告)日:2011-04-19

    申请号:US12308281

    申请日:2006-06-12

    IPC分类号: H03M5/00

    摘要: There are provided a method and apparatus for embedding a second level code into a first level code of an optical disc by data modulation rule variation. The apparatus includes a multi-level, varying rule based modulator (199) for modulating the first level code to obtain a channel bit stream representative of the first level code and having the second level code embedded therein. The multi-level, varying rule based modulator modulates the first level code using modulation rules respectively having different statistical properties of pit-land length distributions that preserve a readability of the first level code and that are distinguishable at readout of the optical disc. The different statistical properties represent binary or multilevel data of the second level code.

    摘要翻译: 提供了一种通过数据调制规则变化将第二级代码嵌入到光盘的第一级代码中的方法和装置。 该装置包括用于调制第一级代码以获得代表第一级代码并且嵌入其中的第二级代码的通道位流的多级变化规则调制器(199)。 基于多级变化规则的调制器使用调制规则调制第一级代码,该调制规则分别具有不同的凹坑间距长度分布的统计特性,这保持了第一级代码的可读性,并且在读出光盘时是可区分的。 不同的统计属性表示第二级代码的二进制或多级数据。

    Disc Authentication by Grayscale Image in Data Area Obtained by Modulation Rule Variation (Old Title)
    3.
    发明申请
    Disc Authentication by Grayscale Image in Data Area Obtained by Modulation Rule Variation (Old Title) 失效
    通过调制规则变化获得的数据区域中的灰度图像的光盘认证(旧标题)

    公开(公告)号:US20090122684A1

    公开(公告)日:2009-05-14

    申请号:US12227463

    申请日:2006-06-15

    IPC分类号: G11B7/00

    摘要: The present principles provide a way to place a multilevel grayscale image, visible with the bare eye in the data area of an optical disc. This feature can be used to authenticate a legitimate disc, since the image features are lost when copying a disc either with a PC recording drive or by a pirate creating a data set to be used on a laser beam recorder to produce forged ROM discs. The modulation rules are selectively varied during disc writing in a way to change the distribution of pit/land lengths, so that the at three (3) different diffraction properties are generated, and therefore produce at least three (3) distinct looks to the bare eye.

    摘要翻译: 本原理提供了一种将裸眼可见的多级灰度图像放置在光盘的数据区域中的方法。 该功能可用于认证合法光盘,因为当使用PC记录驱动器或由创建要在激光束记录器上使用的数据集的盗版者复制光盘时,图像特征丢失,以产生伪造的ROM光盘。 在盘写入期间,调制规则被选择性地改变,以改变凹坑/平台长度的分布,使得产生三(3)个不同的衍射特性,因此产生至少三(3)个不同外观的裸露 眼。

    Disc authentication by grayscale image
    6.
    发明授权
    Disc authentication by grayscale image 失效
    通过灰度图像进行光盘认证

    公开(公告)号:US08379501B2

    公开(公告)日:2013-02-19

    申请号:US12227463

    申请日:2006-06-15

    IPC分类号: G11B7/00

    摘要: The present principles provide a way to place a multilevel grayscale image, visible with the bare eye in the data area of an optical disc. This feature can be used to authenticate a legitimate disc, since the image features are lost when copying a disc either with a PC recording drive or by a pirate creating a data set to be used on a laser beam recorder to produce forged ROM discs. The modulation rules are selectively varied during disc writing in a way to change the distribution of pit/land lengths, so that the at least three (3) different diffraction properties are generated, and therefore produce at least three (3) distinct looks to the bare eye.

    摘要翻译: 本原理提供了一种将裸眼可见的多级灰度图像放置在光盘的数据区域中的方法。 该功能可用于认证合法光盘,因为当使用PC记录驱动器或由创建要在激光束记录器上使用的数据集的盗版者复制光盘时,图像特征丢失,以产生伪造的ROM光盘。 在盘写入期间,调制规则被选择性地变化,以便改变凹坑/平台长度的分布,从而产生至少三(3)个不同的衍射属性,因此产生至少三(3)个不同的外观 裸眼

    Method and apparatus for embedding second code into optical disc data by data modulation rule variation
    8.
    发明申请
    Method and apparatus for embedding second code into optical disc data by data modulation rule variation 有权
    通过数据调制规则变化将第二代码嵌入光盘数据的方法和装置

    公开(公告)号:US20100188272A1

    公开(公告)日:2010-07-29

    申请号:US12308281

    申请日:2006-06-12

    IPC分类号: H03M5/02

    摘要: There are provided a method and apparatus for embedding a second level code into a first level code of an optical disc by data modulation rule variation. The apparatus includes a multi-level, varying rule based modulator (199) for modulating the first level code to obtain a channel bit stream representative of the first level code and having the second level code embedded therein. The multi-level, varying rule based modulator modulates the first level code using modulation rules respectively having different statistical properties of pit-land length distributions that preserve a readability of the first level code and that are distinguishable at readout of the optical disc. The different statistical properties represent binary or multilevel data of the second level code.

    摘要翻译: 提供了一种通过数据调制规则变化将第二级代码嵌入到光盘的第一级代码中的方法和装置。 该装置包括用于调制第一级代码以获得代表第一级代码并且嵌入其中的第二级代码的通道位流的多级变化规则调制器(199)。 基于多级变化规则的调制器使用调制规则调制第一级代码,该调制规则分别具有不同的凹坑间距长度分布的统计特性,这保持了第一级代码的可读性,并且在读出光盘时是可区分的。 不同的统计属性表示第二级代码的二进制或多级数据。