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A Stereo Input-Output Superdirective Beamformer for Dual Channel Noise Reduction

Authors:
Lotter, T.Sauert, B.Vary, P.
Book Title:
Proceedings of European Conference on Speech Communication and Technology (INTERSPEECH)
Organization:
ISCA
Pages:
p.p. 2285-2288
Address:
Lisboa, Portugal
Date:
Sep. 2005
Language:
English

Abstract

This contribution presents a stereo input-output beamformer for dual channel noise reduction. The computationally very efficient beamformer adapts superdirective filter design techniques to binaural input signals to optimally enhance signals from a given spatial direction. The beamformer outputs a stereo enhanced signal and thus preserves the spatial impression. Experiments in a real environment using a dummy head and various speech sources indicate that the proposed algorithm is capable of improving the speech intelligibility significantly.

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