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An evaluation of an adaptive multichannel system for speech enhancement with automatic phase alignment

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2 Author(s)
S. L. do N. Cunha Costa ; Dept. de Engenharia Eletrica, Univ. Federal de Pernambuco, Campina Grande, Brazil ; B. G. Aguiar Neto

This paper presents an evaluation of an adaptive multichannel system to enhancement of speech degraded by environment acoustic noise. The system input is a four microphone array connected to an automatic phase alignment unit which gives a gain of 2 to 4 dB. An estimation has been made of the spectral densities of speech and noise to be used as input to a Wiener filter, the coefficients of which are computed by a frequency domain algorithm. The signal estimated on filter output presents a total gain in the signal-to-noise ratio of about 10 dB. Informal subjective listening tests indicates an improvement in the signal quality and its intelligibility is considered very good

Published in:

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on  (Volume:1 )

Date of Conference:

9-12 May 1995