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DIGITAL WATERMARK EMBEDDING APPARATUS, DIGITAL WATERMARK EMBEDDING METHOD, AND DIGITAL WATERMARK DETECTION APPARATUS

  • US 20120163653A1
  • Filed: 12/20/2011
  • Published: 06/28/2012
  • Est. Priority Date: 12/28/2010
  • Status: Active Grant
First Claim
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1. A digital watermark embedding apparatus comprising:

  • an interface unit which acquires video data and digital watermark information; and

    a processing unit which embeds the digital watermark information into the video data, whereinthe processing unit is adapted to cause the area of a watermark pattern formed by a plurality of pixels having a prescribed value, and superimposed on each image contained in the video data, to vary the area of the watermark pattern in periodic fashion over time according to the value of a symbol contained in the digital watermark information, andcorrect, using the prescribed value, the value of each pixel contained in a region where each image in the video data and the watermark pattern corresponding to the each image overlap each other.

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