Digital watermarking systems and methods
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United States of America Patent
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Aug 16, 2011
Grant Date -
May 21, 2009
app pub date -
Oct 14, 2008
filing date -
Jul 27, 1995
priority date (Note) -
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Abstract
The present invention relates to watermarking of compressed audio or video files. One claim recites a method including: obtaining a copy of a compressed audio or video file; decompressing the compressed audio or video file to yield decompressed audio or video content; determining a first watermarking component for the decompressed audio or video content, the first watermarking component intended to be steganographically hidden in the audio or video content; storing the first digital watermarking component separately from the compressed audio or video file; and then providing the stored first watermarking component, a unique plural-bit watermark identifier, and the compressed audio or video file to a remote location. Other claims and combinations are provided as well.
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