System and method for identification of a speaker by phonograms of spontaneous oral speech and by using formant equalization using one vowel phoneme type
First Claim
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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Abstract
A system and method for identification of a speaker by phonograms of oral speech is disclosed. Similarity between a first phonogram of the speaker and a second, or sample, phonogram is evaluated by matching formant frequencies in referential utterances of a speech signal, where the utterances for comparison are selected from the first phonogram and the second phonogram. Referential utterances of speech signals are selected from the first phonogram and the second phonogram, where the referential utterances include formant paths of at least three formant frequencies; wherein the first two formants are within typical variability limits for one vowel phoneme type. The selected referential utterances including at least two identical formant frequencies are compared therebetween. Similarity of the compared referential utterances from matching other formant frequencies is evaluated, where similarity of the phonograms is determined from evaluation of similarity of all the compared referential utterances.
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Citations
15 Claims
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1. A method for identification of a speaker by phonograms of oral speech, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A system for identification of a speaker by phonograms of oral speech, the system comprising:
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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;select 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; compare out of the selected referential utterances those selected referential utterances comprising at least two formant frequencies values having the same values; and evaluate 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. - View Dependent Claims (7, 8, 9, 10)
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11. A system for identification of a speaker by phonograms of oral speech, the system comprising:
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means for selecting 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 the given typical variability limits of formant frequency values for a specific type of vowel phoneme in a given language; means for comparing out of the selected referential utterances those selected referential utterances comprising at least two formant frequencies having the same values; and means for evaluating similarity of the compared referential utterances on the basis of comparison of other formant frequencies out of the at least at least three formant frequencies, wherein similarity of the phonograms is determined from evaluation of similarity of all the compared referential utterances. - View Dependent Claims (12, 13, 14, 15)
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Specification