A broadband beamforming for speech enhancement in the reverberant environment

Abstract

A microphone array speech enhancement method based on blind broadband beamforming is introduced in this paper. The broadband signals are firstly divided into sub-bands in the frequency domain. Then the steering vector is then estimated by computing the singular value decomposition of the forth-order cross cumulant matrix. Finally, the sub-band speech signals are reconstructed and the corrupted speech is enhanced. Simulation results show that compared with some methods, the proposed method in the paper has good performance in the reverberation environments even without the information about direction of interest signal.