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Apparatus and method of processing image data, transmission medium, and recording medium

  • US 6,404,926 B1
  • Filed: 09/01/1998
  • Issued: 06/11/2002
  • Est. Priority Date: 09/02/1997
  • Status: Expired due to Fees
First Claim
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1. An image data processing apparatus for processing an image data in which an accompany information is embedded as a watermark, comprising:

  • a first storage means for storing a pattern of said watermark;

    a second storage means for storing a relationship of a plurality of accompany information signals indicating respective copy protection states and a phase of said watermark, said phase of said watermark corresponding to a spatial position of said watermark;

    a selecting means for selecting a phase of said watermark corresponding to said accompany information signal;

    a phase setting means for reading a pattern of said watermark being stored in said first storage means, and for setting to a phase selected by said selecting means by spatially shifting said watermark stored in said first storage means; and

    an adding means for adding a watermark of said phase set by said phase setting means to said image data.

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