Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Incorporating the Conditional Speech Presence Probability in Multi-Channel Wiener Filter Based Noise Reduction in Hearing Aids | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 930625 11 pages doi 2009 930625 Research Article Incorporating the Conditional Speech Presence Probability in Multi-Channel Wiener Filter Based Noise Reduction in Hearing Aids KimNgo EURASIP Member 1 Ann Spriet 1 2 Marc Moonen EURASIP Member 1 Jan Wouters 2 and Soren Holdt Jensen EURASIP Member 3 department of Electrical Engineering Katholieke Universiteit Leuven ESAT-SCD KasteelparkArenberg 10 B-3001 Leuven Belgium 2 Division of Experimental Otorhinolaryngology Katholieke Universiteit Leuven ExpORL O. N2 Herestraat 49 721 B-3000 Leuven Belgium 3 Department of Electronic Systems Aalborg University Niels Jernes Vej 12 DK-9220 Aalborg Denmark Correspondence should be addressed to Kim Ngo Received 15 December 2008 Revised 30 March 2009 Accepted 2 June 2009 Recommended by Walter Kellermann A multi-channel noise reduction technique is presented based on a Speech Distortion-Weighted Multi-channel Wiener Filter SDW-MWF approach that incorporates the conditional Speech Presence Probability SPP . A traditional SDW-MWF uses a fixed parameter to a trade-off between noise reduction and speech distortion without taking speech presence 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. Incorporating the conditional SPP in SDW-MWF allows to exploit the fact that speech may not be present at all frequencies and at all times while the noise can indeed be continuously present. In speech dominant segments it is then desirable to have less noise reduction to avoid speech distortion while in noise dominant segments it is desirable to have as much noise reduction as possible. Experimental results with hearing aid scenarios demonstrate that the proposed SDW-MWF incorporating the conditional SPP improves the .
