Title :
Separation of excitation source and vocal tract transfer function via an MVDR analysis of speech
Author :
Santarelli, Alberto ; Omologo, Maurizio ; Armani, Luca
Author_Institution :
ITC-irst, Trento, Italy
Abstract :
The usage of MVDR (minimum variance distortionless response) spectrum estimation for separating excitation source from vocal tract transfer function in speech analysis is discussed. It is shown how an MVDR all-pole model and its inverse filter for source deconvolution can easily be derived by applying spectral factorization. We outline the theory of the Bauer method for spectral factorization, presenting examples of the application to real data recorded by distant microphones and giving insights on this technique.
Keywords :
FIR filters; deconvolution; parameter estimation; poles and zeros; signal reconstruction; spectral analysis; speech processing; transfer functions; Bauer method; FIR filter; MVDR spectrum estimation; all-pole model; excitation source separation; inverse filter; source deconvolution; spectral factorization; speech analysis; speech reconstruction; vocal tract transfer function; Equations; Filters; Inverse problems; Microphones; Predictive models; Resonance; Speech analysis; Speech processing; Transfer functions; Transforms;
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics, 2003 IEEE Workshop on.
Print_ISBN :
0-7803-7850-4
DOI :
10.1109/ASPAA.2003.1285833
