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System and method for identification of a speaker by phonograms of spontaneous oral speech and by using formant equalization using one vowel phoneme type

  • US 9,047,866 B2
  • Filed: 03/23/2012
  • Issued: 06/02/2015
  • Est. Priority Date: 09/24/2009
  • Status: Active Grant
First Claim
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1. A method for identification of a speaker by phonograms of oral speech, the method comprising:

  • Selecting, via a computing device, referential utterances of speech signals from a first phonogram of the speaker and a second, or sample, phonogram, wherein the referential utterances comprise formant paths of at least three formant frequencies, and values of the first two formants of the formant paths are within given typical variability limits of formant frequency values for a specific type of vowel phoneme in a given language;

    Comparing, via the computing device, out of the selected referential utterances those selected referential utterances comprising at least two formant frequencies having the same values;

    and evaluating, via the computing device, similarity of the compared referential utterances on the basis of comparison of other formant frequencies out of the at least three formant frequencies, wherein similarity of the phonograms is determined from evaluation of similarity of all the compared referential utterances.

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