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    Synchronization of Digital Watermarks
    4.
    发明申请
    Synchronization of Digital Watermarks 有权
    数字水印的同步

    公开(公告)号：US20110123063A1

    公开(公告)日：2011-05-26

    申请号：US12951843

    申请日：2010-11-22

    申请人： Edward J. Delp ,  Eugene T. Lin

    发明人： Edward J. Delp ,  Eugene T. Lin

    IPC分类号： G06K9/00

    CPC分类号： H04N5/04 ,  G06T1/0028 ,  G06T1/0064 ,  G06T2201/0051 ,  G06T2201/0052 ,  H04N5/4401 ,  H04N19/467 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/44008 ,  H04N21/8358

    摘要： A method for synchronization of a digital watermark generates a digital watermark based on feature extraction and a key generator. The synchronization method is adapted for both temporal and spatial synchronization. Statistical features of the watermarked signal along with key generators are used to compute keys used to detect embedded digital watermarks that vary over time or space. For spatial synchronization, spatial redundancy is used to detect geometric distortion of a signal in which the watermark is embedded using an autocorrelation method to detect peaks caused by the redundancy of the watermark structure. These peaks are then analyzed with a histogram method to detect rotation and scaling of the host media signal. The spatial synchronization process is applied to watermarks for both intra-coded frames of video (I-frames) as well as still images.

    摘要翻译： 一种用于数字水印同步的方法基于特征提取和密钥生成器生成数字水印。 同步方法适用于时间和空间同步。 水印信号与密钥生成器的统计特征被用于计算用于检测随时间或空间变化的嵌入式数字水印的密钥。 对于空间同步，使用空间冗余来检测使用自相关方法嵌入水印的信号的几何失真，以检测由水印结构的冗余引起的峰值。 然后用直方图方法分析这些峰，以检测主媒体信号的旋转和缩放。 空间同步过程被应用于视频（I帧）的帧内编码帧以及静止图像的水印。

    Temporal synchronization of video and audio signals
    5.
    发明授权
    Temporal synchronization of video and audio signals 有权
    视频和音频信号的时间同步

    公开(公告)号：US07886151B2

    公开(公告)日：2011-02-08

    申请号：US10349322

    申请日：2003-01-21

    申请人： Edward J. Delp ,  Eugene T. Lin

    发明人： Edward J. Delp ,  Eugene T. Lin

    IPC分类号： H04L9/32

    CPC分类号： G06T1/0028 ,  G06T1/0064 ,  G06T2201/0051 ,  G06T2201/0052 ,  H04N5/04 ,  H04N5/4401 ,  H04N19/467 ,  H04N21/23418 ,  H04N21/242 ,  H04N21/8358

    摘要： A protocol for temporal synchronization of media signals with temporal components is used for digital watermarking and other applications. The synchronization protocol achieves initial synchronization by finding an initial synchronization key through analysis of a temporal media signal stream. It then uses features of the stream and a queue of one or more keys from previous frames to derive subsequent keys to maintain synchronization. If synchronization is lost due to channel errors or attacks, for example, the protocol uses the initial synchronization key to re-establish synchronization. In digital watermarking applications, the synchronization protocol is agnostic to the watermark embedding and reading functions.

    摘要翻译： 用于时间分量的媒体信号的时间同步协议用于数字水印和其他应用。 同步协议通过分析时间媒体信号流来找到初始同步密钥来实现初始同步。 然后，它使用流的特征和来自先前帧的一个或多个密钥的队列来导出后续密钥以维持同步。 如果由于信道错误或攻击而导致同步丢失，例如，协议使用初始同步密钥来重新建立同步。 在数字水印应用中，同步协议与水印嵌入和读取功能无关。

    Synchronization of media signals
    6.
    发明授权
    Synchronization of media signals 有权
    媒体信号的同步

    公开(公告)号：US07840005B2

    公开(公告)日：2010-11-23

    申请号：US11040168

    申请日：2005-01-20

    申请人： Edward J. Delp ,  Eugene T. Lin

    发明人： Edward J. Delp ,  Eugene T. Lin

    IPC分类号： H04N7/167

    CPC分类号： H04N5/04 ,  G06T1/0028 ,  G06T1/0064 ,  G06T2201/0051 ,  G06T2201/0052 ,  H04N5/4401 ,  H04N19/467 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/44008 ,  H04N21/8358

    摘要： A method for synchronization of a media signal computes features of the media signal and determines redundancy of the features to establish synchronization. The synchronization method is adapted for both temporal and spatial synchronization. For spatial synchronization, spatial redundancy is used to detect geometric distortion of a signal using an autocorrelation method to detect peaks caused by the redundancy of features of the signal. These peaks are then analyzed with a histogram method to detect rotation and scaling of the host media signal. The spatial synchronization process is applied for both intra-coded frames of video (I-frames) as well as still images.

    摘要翻译： 媒体信号的同步方法计算媒体信号的特征并确定特征的冗余以建立同步。 同步方法适用于时间和空间同步。 对于空间同步，使用空间冗余来使用自相关方法检测信号的几何失真，以检测由信号特征的冗余引起的峰值。 然后用直方图方法分析这些峰，以检测主媒体信号的旋转和缩放。 空间同步过程被应用于视频（I帧）的帧内编码帧以及静止图像。

    Synchronization of digital watermarks
    7.
    发明授权
    Synchronization of digital watermarks 有权
    数字水印同步

    公开(公告)号：US08370635B2

    公开(公告)日：2013-02-05

    申请号：US12951843

    申请日：2010-11-22

    申请人： Edward J. Delp ,  Eugene T. Lin

    发明人： Edward J. Delp ,  Eugene T. Lin

    IPC分类号： H04L9/32

    CPC分类号： H04N5/04 ,  G06T1/0028 ,  G06T1/0064 ,  G06T2201/0051 ,  G06T2201/0052 ,  H04N5/4401 ,  H04N19/467 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/44008 ,  H04N21/8358

    摘要： A method for synchronization of a digital watermark generates a digital watermark based on feature extraction and a key generator. The synchronization method is adapted for both temporal and spatial synchronization. Statistical features of the watermarked signal along with key generators are used to compute keys used to detect embedded digital watermarks that vary over time or space. For spatial synchronization, spatial redundancy is used to detect geometric distortion of a signal in which the watermark is embedded using an autocorrelation method to detect peaks caused by the redundancy of the watermark structure. These peaks are then analyzed with a histogram method to detect rotation and scaling of the host media signal. The spatial synchronization process is applied to watermarks for both intra-coded frames of video (I-frames) as well as still images.

    摘要翻译： 一种用于数字水印同步的方法基于特征提取和密钥生成器生成数字水印。 同步方法适用于时间和空间同步。 水印信号与密钥生成器的统计特征被用于计算用于检测随时间或空间变化的嵌入式数字水印的密钥。 对于空间同步，使用空间冗余来检测使用自相关方法嵌入水印的信号的几何失真，以检测由水印结构的冗余引起的峰值。 然后用直方图方法分析这些峰，以检测主媒体信号的旋转和缩放。 空间同步过程被应用于视频（I帧）的帧内编码帧以及静止图像的水印。