Title :
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
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5041-3
DOI :
10.1109/ICASSP.1999.759852
