Including a metric in a digital watermark for media authentication
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United States of America Patent
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Oct 20, 2009
Grant Date -
Oct 24, 2002
app pub date -
Oct 26, 2001
filing date -
Apr 20, 2001
priority date (Note) -
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Abstract
A method is provided for authenticating a media signal and related software, systems and applications. A digital watermark is embedded in the media signal. A metric is calculated for the digital watermark as embedded in the media signal. The resulting metric is then embedded in the media signal with the digital watermark. To detect a potential alteration, a detector computes the metric for a potentially corrupted version of the embedded media signal. The detector then compares its computed metric to the embedded metric to detect whether the alteration has occurred.
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