An event-based method for microphone array speech enhancement

Author

Brandstein, Michael S.

Author_Institution

Div. of Eng. & Appl. Sci., Harvard Univ., Cambridge, MA, USA

Volume

2

fYear

1999

fDate

15-19 Mar 1999

Firstpage

953

Abstract

This paper presents the multi-channel multi-pulse (MCMP) algorithm for the enhancement of speech degraded by reverberations and additive noise. The enhanced speech is synthesized from a sequence of impulses exciting a linear predictive filter. The excitation signal is computed from a nonlinear process which uses impulse clustering of the multi-channel speech data to discriminate portions of the linear prediction residual produced by the desired speech signal from those due to multipath effects and uncorrelated noise. The MCMP algorithm is shown to be capable of identifying and attenuating reverberant portions of the speech signal as well as reducing the effects of additive noise

Keywords

acoustic transducer arrays; array signal processing; filtering theory; linear predictive coding; microphones; multipath channels; noise; reverberation; speech coding; speech enhancement; LPC processing; MCMP algorithm; additive noise; event-based method; excitation signal; impulse clustering; impulse sequence; linear prediction residual; linear predictive filter; microphone array speech enhancement; multichannel multipulse algorithm; multichannel speech data; multipath effects; nonlinear process; reverberations; speech signal; uncorrelated noise; Additive noise; Clustering algorithms; Degradation; Microphone arrays; Reverberation; Signal processing; Signal synthesis; Speech enhancement; Speech processing; Speech synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on

Conference_Location

Phoenix, AZ

ISSN

1520-6149

Print_ISBN

0-7803-5041-3

Type

conf

DOI

10.1109/ICASSP.1999.759852

Filename

759852