Transmarking of multimedia signals
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United States of America Patent
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May 13, 2008
Grant Date -
Nov 22, 2001
app pub date -
Mar 16, 2001
filing date -
Sep 25, 1998
priority date (Note) -
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Abstract
A method of transmarking a watermarked media signal to adapt the watermark to the robustness and perceptibility constraints of a new environment. This transmarking method detects the first digital watermark in the media signal. It then embeds message information from the first digital watermark into a second digital watermark in the media signal before the media signal undergoes a transformation process. The second digital watermark is adapted to survive the transformation process. A variation of this method detects the first digital watermark in the media signal, converts the media signal to a different format, and embeds message information from the first digital watermark into a second digital watermark in the converted media signal. The second digital watermark is adapted to robustness or perceptibility parameters associated with the new format.
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