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CONTENT AUTHENTICATION AND RECOVERY USING DIGITAL WATERMARKS

8,032,758

10/4/2011 12:00:00 AM

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.