ITRW on Non-Linear Speech Processing (NOLISP 05) Barcelona, Spain April 19-22, 2005

Voiced Excitation Models for Speech Production Based on Time Variable Volterra Systems

Karl Schnell, Arild Lacroix

Institute of Applied Physics, Goethe-University Frankfurt, Frankfurt am Main, Germany

The speech production can be modeled by linear and nonlinear systems. In this contribution a time variable nonlinear Volterra system is used to model the fluctuations of the voiced excitation while a linear system models the resonances of the speech production system. The estimation of the Volterra system is performed by a prediction algorithm. This is enabled by a description of the prediction problem as an approximation by a series expansion. Speech examples show that the use of a time variable Volterra system improves the naturalness of the synthetic speech.

Full Paper

Bibliographic reference.  Schnell, Karl / Lacroix, Arild (2005): "Voiced excitation models for speech production based on time variable Volterra systems", In NOLISP-2005, 184-187.