Content authentication and recovery using digital watermarks
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United States of America Patent
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Jun 17, 2008
Grant Date -
Oct 10, 2002
app pub date -
Oct 18, 2001
filing date -
Nov 8, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The disclosure describes methods for using digital watermarking to authenticate digital media signals, such as images, audio and video signals. It also describes techniques for using embedded watermarks to repair altered parts of a media signal when alteration is detected. Alteration is detected using hashes, digital watermarks, and a combination of hashes and digital watermarks.
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