Digital watermark detection method and apparatus
    8.
    发明申请
    Digital watermark detection method and apparatus 失效
    数字水印检测方法及装置

    公开(公告)号:US20050053259A1

    公开(公告)日:2005-03-10

    申请号:US10808279

    申请日:2004-03-25

    CPC分类号: G06T1/0064 G06T2201/0052

    摘要: An image size reduction unit reduces the image size of an input image signal, thereby generating a size-reduced image signal. A specific frequency component extraction unit extracts a specific frequency component signal from the size-reduced image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes a cross-correlation value between the phase-controlled specific frequency component signal and size-reduced image signal. A watermark information estimation unit estimates, from the cross-correlation value, watermark information embedded in the input image signal.

    摘要翻译: 图像尺寸减小单元减小输入图像信号的图像尺寸,从而生成尺寸缩小图像信号。 特定频率分量提取单元从尺寸缩小图像信号中提取特定频率分量信号。 相位控制器控制特定频率分量信号的相位。 相关器计算相位控制特定频率分量信号和尺寸减小图像信号之间的互相关值。 水印信息估计单元从互相关值估计嵌入在输入图像信号中的水印信息。

    DATA MULTIPLEXING/DEMULTIPLEXING APPARATUS
    9.
    发明申请
    DATA MULTIPLEXING/DEMULTIPLEXING APPARATUS 失效
    数据多路复用/解复用器

    公开(公告)号:US20090154499A1

    公开(公告)日:2009-06-18

    申请号:US12390249

    申请日:2009-02-20

    IPC分类号: H04J3/24

    摘要: In generation of a system header included in an program stream of extended MPEG-2 Systems, when a basic stream ID is an extension ID and basic buffer size information represents 0 byte, extension buffer size information expressed by a total of 24 bits of an extension ID, a marker bit and an extension stream ID and a total of 24 bits including an extension stream ID, a marker bit and extension buffer bound scale information and required for reproduction of an elementary stream to be multiplexed using a pair of an extension ID and an extension stream ID is generated and recorded.

    摘要翻译: 在包括在扩展MPEG-2系统的节目流中的系统头部的生成中,当基本流ID是扩展ID并且基本缓冲器大小信息表示0字节时,扩展缓冲器大小信息由总共24位的扩展 ID,标记位和扩展流ID,以及总共24位,包括扩展流ID,标记位和扩展缓冲器绑定缩放信息,并且使用一对扩展ID和/ 生成并记录扩展流ID。