Methods and Apparatuses for Robust Watermarking in Multimedia Content
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United States of America Patent
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Issued Date -
Oct 8, 2015
app pub date -
Apr 5, 2014
filing date -
Apr 5, 2014
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Abstract
Methods and apparatuses for embedding watermark information into multimedia contents like audio, imagery or video, and for detection of such watermarks from embedded multimedia content. A two step embedding approach is proposed wherein the watermark bits are first used to construct a modulation signal. Said modulation signal is used to modify certain selected characteristics of the media content. A detector is then used to first extract the modulation signal from embedded media content, and then to extract watermark information from the modulation signal extracted. This current invention enhances watermark robustness against classes of attacks that prior arts are vulnerable to resist. Current invention is novel and useful in any multimedia application fields, including but not limited to the identification, distribution tracking and copyright protection of audio, imagery and video contents.
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