High-resolution formant estimation and its application in frequency scaling of speech
Douglas J. Nelson, Srinivasan Umesh, Leon W. Cohen · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
We present a method for accurate estimation of formant frequencies. The method is based on differentiating the phase of the short time Fourier transform. The motivation for the method is its application to the estimation of the recently introduced 'universal warping function' which is aimed at separating the speaker dependence from the phonetic content of a speech utterance. The universal warping function is determined by the nature of the relationship between formants of different speakers for phonetically similar sounds and requires an accurate estimate of formants. The proposed method provides sufficiently accuracy for its estimation.