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

A system for identification of a speaker by phonograms of oral speech, the system comprising:

• a computer memory configured to store digital audio signal files representative of a plurality of phonograms converted into digital form;
• a computing device configured to:
• evaluate similarity between a first phonogram of the speaker and a second phonogram by matching formant frequencies in referential utterances of a speech signal, wherein the utterances for comparison are selected from the first phonogram and the second phonogram;
• select referential utterances of speech signals from the first phonogram and the second phonogram, wherein the referential utterances comprise formant paths of at least three formant frequencies;
• compare therebetween the selected referential utterances comprising at least two identical formant frequencies;
• and
• evaluate similarity of the compared referential utterances from matching other formant frequencies, wherein similarity of the phonograms is determined from evaluation of similarity of all the compared referential utterances.

A system for identification of a speaker by phonograms of oral speech, the system comprising:

• means for evaluating similarity between a first phonogram of the speaker and a second, or sample, phonogram by matching formant frequencies in referential utterances of a speech signal, wherein the utterances for comparison are selected from the first phonogram and the second phonogram;
• means for selecting referential utterances of speech signals from the first phonogram and the second phonogram, wherein the referential utterances comprise formant paths of at least three formant frequencies;
• means for comparing therebetween the selected referential utterances comprising at least two identical formant frequencies;
• and
• means for evaluating similarity of the compared referential utterances from matching other formant frequencies, wherein similarity of the phonograms is determined from evaluation of similarity of all the compared referential utterances.