Method and apparatus for scene-based video watermarking
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United States of America Patent
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May 1, 2001
Grant Date -
N/A
app pub date -
Aug 27, 1997
filing date -
Aug 30, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for the scene-based watermarking of video data is disclosed. In one embodiment, each of a number of frames of a scene of video host data undergoes a temporal wavelet transform, from which blocks are extracted. The blocks undergo perceptual masking in the frequency domain, such that a watermark is embedded therein. Once the watermark block is taken out of the frequency domain, a spatial mask of the original block is weighted to the watermark block, and added to the original block to obtain the watermarked block.
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