Autodirective microphone systems for natural communication with speech recognizers

Authors:
J. L. Flanagan;R. Mammone;G. W. Elko
Affiliations:
-;-;-
Venue:
HLT '91 Proceedings of the workshop on Speech and Natural Language
Year:
1991

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Cited 2

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Experimental results for baseline speech recognition performance using input acquired from a linear microphone array

HLT '91 Proceedings of the workshop on Speech and Natural Language

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Abstract

Two technological advances support new sophistication in sound capture; namely, high-quality low-cost electret microphones and high-speed economical signal processors. Combined with new understanding in acoustic beamforming, these technologies permit spatially-selective transduction of speech signals several octaves in bandwidth. Spatial selectivity mitigates the effects of noise and reverberation, and digital processing provides the capability for speech-seeking, autodirective performance. This report outlines the principles of autodirective beamforming for acoustic arrays, and it describes two experimental implementations. It also summarizes the direction and emphasis of continuing research.