Optical disk, and method and apparatus for reproducing information recorded in optical disk
    4.
    发明授权
    Optical disk, and method and apparatus for reproducing information recorded in optical disk 有权
    光盘,以及用于再现记录在光盘中的信息的方法和装置

    公开(公告)号:US06661768B1

    公开(公告)日:2003-12-09

    申请号:US09677595

    申请日:2000-10-03

    IPC分类号: G11B724

    摘要: An optical disk is provided for recording data of a signal modulated according to a predetermined modulation method in a form of concavo-convex pits. The optical disk includes a first area having a reflecting film partly removed, and a second area for recording pits which are different from pits satisfying requirements of the predetermined modulation method. The first area having the reflecting film partly removed includes a portion which is formed by removing the reflecting film, and has a length longer than a maximum pit length determined by the modulation method in a circumferential direction of the optical disk. When the pits recorded on the optical disk are physically copied as they are, physical copying of the optical disk can be prevented by utilizing such a difference that the authorized optical disk differs from a pirated copy in a combination of the respective reproduced signals of the first and second areas.

    摘要翻译: 提供了一种光盘,用于记录根据预定调制方式调制的信号的数据,其形式为凹凸坑。 光盘包括具有部分去除的反射膜的第一区域和用于记录不同于满足预定调制方式的要求的凹坑的凹坑的第二区域。 具有部分去除反射膜的第一区域包括通过去除反射膜形成的部分,并且具有比在光盘的圆周方向上由调制方法确定的最大凹坑长度更长的长度。 当记录在光盘上的凹坑被物理地复制时,可以通过利用这样的差异来防止光盘的物理复制:授权的光盘与盗版的不同之处在于,将第一 和第二个地区。

    Optical disk, and method and apparatus for reproducing information recorded in optical disk
    7.
    发明申请
    Optical disk, and method and apparatus for reproducing information recorded in optical disk 有权
    光盘,以及用于再现记录在光盘中的信息的方法和装置

    公开(公告)号:US20050169145A1

    公开(公告)日:2005-08-04

    申请号:US11097263

    申请日:2005-04-04

    摘要: An optical disk is provided for recording data of a signal modulated according to a predetermined modulation method in a form of concavo-convex pits. The optical disk includes a first area having a reflecting film partly removed, and a second area for recording pits which are different from pits satisfying requirements of the predetermined modulation method. The first area having the reflecting film partly removed includes a portion which is formed by removing the reflecting film, and has a length longer than a maximum pit length determined by the modulation method in a circumferential direction of the optical disk. When the pits recorded on the optical disk are physically copied as they are, physical copying of the optical disk can be prevented by utilizing such a difference that optical disk differs from a pirated copy in a combination of the respective reproduced signals of the first and second areas.

    摘要翻译: 提供了一种光盘,用于记录根据预定调制方式调制的信号的数据,其形式为凹凸坑。 光盘包括具有部分去除的反射膜的第一区域和用于记录不同于满足预定调制方式的要求的凹坑的凹坑的第二区域。 具有部分去除反射膜的第一区域包括通过去除反射膜形成的部分,并且具有比在光盘的圆周方向上由调制方法确定的最大凹坑长度更长的长度。 当记录在光盘上的凹坑原样被物理地复制时,可以通过利用这样的差异来防止光盘的不同之处在于,光盘与盗版的不同之处在于将第一和第二的各个再现信号的组合 地区