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A FLEXIBLE SPEECH DISTORTION WEIGHTED MULTI-CHANNEL WIENER FILTER FOR NOISE REDUCTION IN HEARING AIDS

Full Paper at IEEE Xplore

Signal Separation

Presented by: Kim Ngo, Author(s): Kim Ngo, Marc Moonen, Katholieke Universiteit Leuven, Belgium; Søren Holdt Jensen, Aalborg University, Denmark; Jan Wouters, Katholieke Universiteit Leuven, Belgium

In this paper, a multi-channel noise reduction algorithm is presented based on a Speech Distortion Weighted Multi-channel Wiener Filter (SDW-MWF) approach that incorporates a flexible weighting factor. A typical SDW-MWF uses a fixed weighting factor to trade-off between noise reduction and speech distortion without taking speech presence or speech absence into account. Consequently, the improvement in noise reduction comes at the cost of a higher speech distortion since the speech dominant segments and the noise dominant segments are weighted equally. Based on a two-state speech model with a noise-only and a speech+noise state, a solution is introduced that allows for a more flexible trade-off between noise reduction and speech distortion. Experimental results with hearing aid scenarios demonstrate that the proposed SDW-MWF incorporating the flexible weighting factor improves the signal-to-noise-ratio with lower speech distortion compared to a typical SDW-MWF and the SDW-MWF incorporating the conditional speech presence probability (SPP).


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  Lecture Information

Recorded: 2011-05-27 10:30 - 10:50, Club E
Added: 20. 6. 2011 00:25
Number of views: 27
Video resolution: 1024x576 px, 512x288 px
Video length: 0:20:37
Audio track: MP3 [6.97 MB], 0:20:37