Technical Program

Paper Detail

Paper:	SLP-P2.4
Session:	Speech Production, Analysis and Modeling
Time:	Tuesday, May 16, 10:30 - 12:30
Presentation:	Poster
Topic:	Speech and Spoken Language Processing: Speech Analysis
Title:	OBTAINING LIP AND GLOTTAL REFLECTION COEFFICIENTS FROM VOWEL SOUNDS
Authors:	Huiqun Deng, INRS-EMT, Canada; Rabab K. Ward, Michael Beddoes, University of British columbia, Canada; Douglas O'Shaughnessy, INRS-EMT, Canada
Abstract:	Knowledge about lip and glottal reflection coefficients during phonation is needed to eliminate their distortion effects on the estimates of vocal-tract area functions and glottal waves from vowel sounds. Direct measurements of these coefficients at human mouths are difficult. This paper presents a method for estimating them from vowel sounds. The estimation encounters an ill-defined inverse problem: the number of unknowns is greater than the number of constrains, and non-unique solutions exist for a sound. To overcome this problem, this paper uses a vowel sound produced by a subject whose vocal-tract area function (VTAF) for the sound is known. The estimates of the lip and the glottal reflection coefficients are determined as those that lead to a VTAF solution most similar to the known VTAF for the sound. The lip and the glottal reflection coefficients obtained for /a/ and /i/ are presented.