Multi-Channel Speech Enhancement in a Car Environment using Wiener Filtering and Spectral Subtraction

Authors:

J. Bitzer, K.U. Simmer, K.-D. Kammeyer, K. U. Simmer

Abstract:

This paper presents a multichannel-algorithm for speech enhancement for hands{free telephone systems in cars. This new algorithm takes advantage of the special noise characteristics in fast driving cars. The incoherence of the noise allows to use adaptive Wienerfiltering in the frequencies above a theoretically determined frequency. Below this frequency a smoothed spectral subtraction (SSS) is used to get an improved noise suppression. The algorithm yields better results in noise reduction with significantly less distortions and artificial noise than spectral subtraction or Wienerfiltering alone.

Document type:

Conference Paper

Publication:

Munich, Germany, 21. - 24. April 1997

Conference:

IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 97)

Pages:

1167-1170

Volume:

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