Estimation of Vocal Tract Shape during Stop Closures
نویسندگان
چکیده
The display of intensity, pitch, and vocal tract shape is considered to be helpful in speech training of the hearing impaired. Vocal tract shape estimation, based on LPC and other analysis techniques, works satisfactorily for vowels but generally fails during stop consonants due to very low signal energy. Our estimation of vocal tract shape is based on reflection coefficients obtained from LPC analysis of speech. In order to study the consistency and dynamics of the vocal tract shape estimation with amplitude variation of vowels, and to study the transitions at vowel-consonant boundaries, we have used “areagram”, a spectrogram-like two-dimensional display of estimated vocal tract cross-sectional area as a function of time and position along the tract length. Display of areagram for vowel-consonant-vowel (VC-V) syllables is satisfactory for vowel part, but during stop closure, area values become random. Based on estimated vocal tract cross sectional area before and after stop closure, conic surfaces are obtained and used for estimation of vocal tract shape during stop closure by a two-dimensional interpolation.
منابع مشابه
Estimation of Place of Constriction during Stop Closures by Bivariate Surface Modeling
Speech-training systems providing visual feedback of vocal tract shape are found to be useful for improving vowel articulation. Estimation of vocal tract shape, based on LPC and other analysis techniques, generally fails during stop closures, due to low signal energy and unavailability of spectral information. A technique has been investigated for the estimation of place of constriction during ...
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The display of intensity, pitch, and vocal tract shape is considered to be helpful in speech training of the hearing impaired. A speech analysis package is developed in MATLAB for displaying speech waveforms, pitch and energy contours, spectrogram, and areagram (a two-dimensional plot of crosssectional area of vocal tract as a function of time and position along the tract length). While vocal t...
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A visual feedback of articulatory efforts can be used in speech-training aids for improving articulation by the hearingimpaired children. LPC-based estimation of vocal tract shape works satisfactorily for vowels but fails during stop closure. The vocal tract shape during the stop closures of vowelconsonant-vowel (VCV) utterances can be estimated by bivariate surface modeling of the vocal tract ...
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Speech-training systems providing visual feedback of vocal tract shape are found to be useful for improving vowel articulation. Estimation of vocal tract shape, based on LPC and other analysis techniques, generally fails during stop closures, due to very low signal energy and unavailability of spectral information. Based on estimated area values and line spectrum pair (LSP) coefficients before ...
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