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Method and system for generating a characteristic identifier for digital data and for detecting identical digital data

  • US 20010005823A1
  • Filed: 12/18/2000
  • Published: 06/28/2001
  • Est. Priority Date: 12/24/1999
  • Status: Active Grant
First Claim
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1. A method for generating a characteristic identifier for digital data, comprising the steps of:

  • mapping frequency coordinates and peak values, of a predetermined number of prominent peaks occurring in an energy spectrum generated from the digital data, into a number of equivalence classes, and wherein the peak values for all equivalent frequency coordinates are summed into one of the equivalence classes; and

    generating the characteristic identifier comprising results of the equivalence transformation.

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