Synchronization of media signals

Details Synchronization of media signals Synchronization of media signals

2005-01-20

2010-11-23

Smithers, Matthew B (Department: 2437)

Cryptography

Video cryptography

Copy protection or prevention

C380S205000, C380S221000, C382S100000, C382S202000, C382S239000, C382S269000, C713S176000

Reexamination Certificate

active

07840005

ABSTRACT:
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.

REFERENCES:
patent: 6122403 (2000-09-01), Rhoads
patent: 6553129 (2003-04-01), Rhoads
patent: 2003/0133589 (2003-07-01), Deguillaume et al.

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