Parametric approaches based on a priori models of the speech are often used in the framework of speech enhancement using a single microphone. When the speech is modeled by means of a stationary autoregressive (AR) process, a frame-by-frame approach is usually considered. However, it requires the unbiased estimations of the autoregressive parameters and of the noise variances for the subsequent implementation of a filter (Kalman, H-infinity, etc.). The purpose of this paper is twofold. Firstly, we propose to view the AR parameter estimation as an errors-in-variables issue. Secondly, we implement an optimal smoothing procedure based on a constrained minimum variance estimation of the signal. Then, we test the procedure based on both steps in the field of speech enhancement.

Errors-in-variables based identification of autoregressive parameters for speech enhancement using one microphone / W. Bobillet; E. Grivel; M. Najim; R. Diversi; R. Guidorzi; U. Soverini. - ELETTRONICO. - (2006). (Intervento presentato al convegno 2nd IEEE International Symposium on Communications, Control and Signal Processing tenutosi a Marrakech, Marocco nel 13-15 Marzo 2006).

Errors-in-variables based identification of autoregressive parameters for speech enhancement using one microphone

DIVERSI, ROBERTO;GUIDORZI, ROBERTO;SOVERINI, UMBERTO
2006

Abstract

Parametric approaches based on a priori models of the speech are often used in the framework of speech enhancement using a single microphone. When the speech is modeled by means of a stationary autoregressive (AR) process, a frame-by-frame approach is usually considered. However, it requires the unbiased estimations of the autoregressive parameters and of the noise variances for the subsequent implementation of a filter (Kalman, H-infinity, etc.). The purpose of this paper is twofold. Firstly, we propose to view the AR parameter estimation as an errors-in-variables issue. Secondly, we implement an optimal smoothing procedure based on a constrained minimum variance estimation of the signal. Then, we test the procedure based on both steps in the field of speech enhancement.
2006
Proceedings of ISCCSP 2006
Errors-in-variables based identification of autoregressive parameters for speech enhancement using one microphone / W. Bobillet; E. Grivel; M. Najim; R. Diversi; R. Guidorzi; U. Soverini. - ELETTRONICO. - (2006). (Intervento presentato al convegno 2nd IEEE International Symposium on Communications, Control and Signal Processing tenutosi a Marrakech, Marocco nel 13-15 Marzo 2006).
W. Bobillet; E. Grivel; M. Najim; R. Diversi; R. Guidorzi; U. Soverini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/27848
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