Speech modeling with time varying amplitude and phase

Author

Giannakis, Georgios B. ; Zhou, Guotong

Author_Institution

Dept. of Electr. Eng., Virginia Univ., Charlottesville, VA, USA

fYear

1994

fDate

25-28 Oct 1994

Firstpage

604

Lastpage

607

Abstract

Formant transitions contain important information related to hearing and perception. The concept of moving poles is used in this paper in relation to the time-varying impulse response model of the vocal tract and describes the trajectory of a formant. The model allows for amplitude modulation as well as other nonstationarities present such as formant bandwidth variations. The moving poles are modeled as polynomial functions of time, whose linear (albeit suboptimal) estimates ate obtained from the higher-order ambiguity function. An overall optimal but nonlinear least squares scheme is developed to improve upon the linear estimates and both algorithms are tested by simulations

Keywords

amplitude estimation; amplitude modulation; least mean squares methods; phase estimation; poles and zeros; polynomials; speech processing; transient response; algorithms; amplitude modulation; formant bandwidth variations; formant trajectory; formant transitions; hearing; higher-order ambiguity function; linear suboptimal estimates; moving poles; nonstationarities; optimal nonlinear least squares; perception; polynomial time functions; simulations; speech modeling; time varying amplitude; time varying phase; time-varying impulse response model; vocal tract; Auditory system; Bandwidth; Frequency modulation; Least squares methods; Linear predictive coding; Polynomials; Shape; Speech; TV; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Time-Frequency and Time-Scale Analysis, 1994., Proceedings of the IEEE-SP International Symposium on

Conference_Location

Philadelphia, PA

Print_ISBN

0-7803-2127-8

Type

conf

DOI

10.1109/TFSA.1994.467279

Filename

467279