SPATIALLY PRE-PROCESSED SPEECH DISTORTION WEIGHTED MULTI -CHANNEL WIENER FILTERING FOR NOISE REDUCTION IN HEARING AIDS
Ann Spriet, Marc Moonen, Jan M Wouters · 2003
In this paper we establish a generalized noise reduction scheme, called the Spatially Pre-processed Speech Distortion Weighted Multi-channel Wiener filter (SP-SDW-MWF), that encompasses the Generalized Sidelobe Canceller (GSC) and a recently developed Multi-channel Wiener Filtering (MWF) technique as extreme cases and allows for in-between solutions. Compared to the widely studied GSC with Quadratic Inequality Constraint (QIC-GSC), the SP-SDW-MWF achieves a better noise reduction performance, for a given maximum speech distortion level.