Microphone array speech enhancement in overdetermined signal scenarios

Authors:
Raymond E. Slyh;Randolph L. Moses
Affiliations:
Department of Electrical Engineering, The Ohio State University, Columbus, Ohio and U. S. Air Force, AL/CFBA, Wright-Patterson AFB, Ohio;Department of Electrical Engineering, The Ohio State University, Columbus, Ohio
Venue:
ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: speech processing - Volume II
Year:
1993

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Abstract

We consider the problem of enhancing noisy speech by using a microphone array. We present an algorithm, called the Graphic Equalizer (GEQ) array, which trades off signal degradation for additional interference suppression. The algorithm is based upon the concept of directly modifying the short-time spectral magnitude of the sum of the received signals. We include simulation results that illustrate the advantages of using the GEQ array for diffuse-noise scenarios and for scenarios involving more interference signals than array degrees of freedom.