Dual Channel Reduction of Rapidly Varying Harmonic and Random Noise Using a Spot Microphone

Authors:

Heese, F. ,  Esch, T. ,  Vary, P.

Book Title:

Konferenz Elektronische Sprachsignalverarbeitung (ESSV)

Organization:

ITG, DEGA

Publisher:

TuDPress Verlag der Wissenschaften GmbH

Series:

Studientexte zur Sprachkommunikation

Volume:

61

Pages:

p.p. 23-30

Address:

Aachen, Germany

Date:

Sep. 2011

ISBN:

978-3-94271-037-4

ISSN:

0940-6832

Language:

English

Abstract

This contribution presents a dual channel speech enhancement system that is operating in the frequency domain. State-of-the-art estimators usually rely on the assumption that the noise signal is stationary or only slightly time-varying. In this contribution we are explicitly considering rapidly time-varying harmonic noise (e.g., engine noise). Therefore we take a spot microphone into account enabling the exploitation of correlation between the main and the spot microphone signals. Our recently proposed noise power spectral density (PSD) estimator for rapidly varing harmonic and random noise is modified and combined with a coherence based noise PSD estimator. The performance of the proposed system provides consistently improved performance.

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