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

Author

Costa, Silvana L do N Cunha ; Neto, Benedito G Aguiar

Author_Institution

Dept. de Engenharia Eletrica, Univ. Federal de Pernambuco, Campina Grande, Brazil

Volume

1

fYear

1995

fDate

9-12 May 1995

Firstpage

844

Abstract

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

Keywords

Wiener filters; acoustic noise; adaptive filters; spectral analysis; speech enhancement; Wiener filter; adaptive multichannel system; automatic phase alignment; environment acoustic noise; estimation; filter output; frequency domain algorithm; informal subjective listening tests; intelligibility; signal quality; signal-to-noise ratio; spectral densities of speech; speech enhancement; Acoustic noise; Adaptive systems; Degradation; Frequency estimation; Microphone arrays; Phased arrays; Speech analysis; Speech enhancement; Wiener filter; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on

Conference_Location

Detroit, MI

ISSN

1520-6149

Print_ISBN

0-7803-2431-5

Type

conf

DOI

10.1109/ICASSP.1995.479826

Filename

479826