发明授权
- 专利标题: Synchronization of media signals
- 专利标题(中): 媒体信号的同步
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申请号: US11040168申请日: 2005-01-20
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公开(公告)号: US07840005B2公开(公告)日: 2010-11-23
- 发明人: Edward J. Delp , Eugene T. Lin
- 申请人: Edward J. Delp , Eugene T. Lin
- 申请人地址: US OR Beaverton
- 专利权人: Digimarc Corporation
- 当前专利权人: Digimarc Corporation
- 当前专利权人地址: US OR Beaverton
- 主分类号: H04N7/167
- IPC分类号: H04N7/167
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.
公开/授权文献
- US20050185819A1 Synchronization of digital watermarks 公开/授权日:2005-08-25
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