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Method and device for incorporating additional information into main information through electronic watermarking technique

  • US 20010046298A1
  • Filed: 07/25/2001
  • Published: 11/29/2001
  • Est. Priority Date: 07/10/1997
  • Status: Active Grant
First Claim
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1. A method of incorporating, into data of first information, data of second information, the data of said first information including a group of data units, said method comprising the steps of:

  • selecting at least two of the data units of said first information and obtaining a data-related value that relates to respective values of said at least two data units;

    selecting, from among a group of the data of said second information, a particular data segment to be incorporated into one of the data units of said first information;

    generating substitute data to replace a content of the one data unit of said first information, on the basis of a predetermined function using, as variables, the data-related value and a value of the particular data segment; and

    replacing a content of the data unit corresponding to a predetermined one of said at least two data units of said first information, by the substitute data generated by said step of generating.

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