Methods for reading watermarks in unknown data types, and DVD drives with such functionality

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8374491
APP PUB NO 20050008334A1
SERIAL NO

10841970

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Abstract

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To prevent playback of pirated, non-encrypted video, a DVD-based system examines data read from a DVD disk for MPEG-like characteristics. If such attributes are detected, the data is examined for the presence of a video usage-control watermark. The presence of such watermark indicates that the video should be distributed only in encrypted form, so playback of video from the disk is prevented.

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Patent Owner(s)

  • DIGIMARC CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rhoads, Geoffrey B West Linn, US 694 76442

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