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

Authors:

Thomas Lotter, Bastian Sauert, and Peter Vary

Book Title:

Proceedings of European Conference on Speech Communication and Technology (INTERSPEECH)

Venue:

Lisboa, Portugal

Event Date:

4.9.2005-8.9.2009

Organization:

ISCA

Date:

Sept. 2005

Pages:

2285–2288

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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