ABSTRACT: MVDR beamformer is a robust beamforming method to enhance a desired (speech) signal in the presence of stationary noise. This paper presents a modified Subband post-filtering approach for MVDR beamformer in microphone array system. The quality of the modified Subband post-filtering is studied in simulated rooms with different noise level and is compared to wiener post-filtering proposed in the literature. Experiments confirm the effectiveness of the proposed system.
Cognitive Informatics (ICCI), 2010 9th IEEE International Conference on; 08/2010