EUROSPEECH '89
First European Conference on Speech Communication and Technology

Paris, France
September 27-29, 1989

Automatic Formant Frequency Extraction by Moment Calculation of Speech Spectrum

Shuichi Itahashi (1), Kazuyuki Takagi (2)

(1) Institute of Information Sciences and Electronics, University of Tsukuba, Tsukuba, Japan
(2) IBM Japan, Ltd.

A revised algorithm of the spectrum moment method for formant frequency estimation is proposed. Second-order and third-order spectrum moments, which reflect the variance and skewness of a spectrum pattern, respectively, are utilized to adjust the frequency regions of centroid calculation. This adjustment improves estimation precision. Experiments using model spectra with an all-pole model gave an estimation error of 1.43 %(male) and 1.07 %(female). Speech material of nineteen kinds of utterances - five Japanese vowels, three kinds of connected vowels and eleven short interrogative sentences - spoken by five male and five female speakers were analyzed. The results gave a mean estimation error of 4.45 % for the male speakers and 7. 30 % for the female speakers.

Full Paper

Bibliographic reference.  Itahashi, Shuichi / Takagi, Kazuyuki (1989): "Automatic formant frequency extraction by moment calculation of speech spectrum", In EUROSPEECH-1989, 2207-2210.