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Suppression of coherent and incoherent noise using a microphone array

Suppression du bruit cohérent et incohérent en utilisant un réseau de microphones

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Abstract

In this paper we present a multimicrophone array for adaptive speech processing in a multipath and reverberant environment. Our proposed system for noise reduction consists of two stages: first the incoherent noise components are removed by Wiener filtering of the received signals. In a second step the possible coherent noise sources, which cannot be suppressed by the Wiener filtering are removed by an additional multichannel noise canceller. A theoretical description of the proposed system is given which shows that this method is able to reduce incoherent as well as coherent noise components and is therefore applicable in realistic conditions.

Résumé

Dans cet article, une méthode de suppression adaptative du bruit en présence de trajets multiples et de réverbération en utilisant un réseau de quatre microphones est présentée. Le système de traitement des signaux de parole est réalisé en deux étapes. La première étape est un filtrage de Wiener pour suppression du bruit incohérent des signaux reçus. La seconde étape utilise un système à canaux multiples pour la suppression du bruit cohérent. Les auteurs présentent les résultats d’une étude théorique de ce système et discutent l’amélioration du rapport signal sur bruit cohérent et incohérent obtenue.

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Authors and Affiliations

  1. Department of Physics and Electrical Engineering, University of Bremen, P.O. Box 330 440, D-28334, Bremen, Allemagne

    Klaus Uwe Simmer, Sven Fischer & Alexander Wasiljeff

Authors
  1. Klaus Uwe Simmer
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  2. Sven Fischer
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  3. Alexander Wasiljeff
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Simmer, K.U., Fischer, S. & Wasiljeff, A. Suppression of coherent and incoherent noise using a microphone array. Ann. Télécommun. 49, 439–446 (1994). https://doi.org/10.1007/BF02999432

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  • DOI: https://doi.org/10.1007/BF02999432

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