tailieunhanh - Báo cáo hóa học: " Research Article Multimicrophone Speech Dereverberation: Experimental Validation"

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 Multimicrophone Speech Dereverberation: Experimental Validation | Hindawi Publishing Corporation EURASIP Journal on Audio Speech and Music Processing Volume 2007 Article ID 51831 19 pages doi 2007 51831 Research Article Multimicrophone Speech Dereverberation Experimental Validation Koen Eneman1 2 and Marc Moonen3 1 ExpORL Department of Neurosciences Katholieke Universiteit Leuven O N 2 Herestraat 49 bus 721 3000 Leuven Belgium 2 GroupT Leuven Engineering School Vesaliusstraat 13 3000 Leuven Belgium 3SCD Department of Electrical Engineering ESAT Faculty of Engineering Katholieke Universiteit Leuven KasteelparkArenberg 10 3001 Leuven Belgium Received 6 September 2006 Revised 9 January 2007 Accepted 10 April 2007 Recommended by James Kates Dereverberation is required in various speech processing applications such as handsfree telephony and voice-controlled systems especially when signals are applied that are recorded in a moderately or highly reverberant environment. In this paper we compare a number of classical and more recently developed multimicrophone dereverberation algorithms and validate the different algorithmic settings by means of two performance indices and a speech recognition system. It is found that some of the classical solutions obtain a moderate signal enhancement. More advanced subspace-based dereverberation techniques on the other hand fail to enhance the signals despite their high-computational load. Copyright 2007 K. Eneman and M. Moonen. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION In various speech communication applications such as teleconferencing handsfree telephony and voice-controlled systems the signal quality is degraded in many ways. Apart from acoustic echoes and background noise reverberation is added to the signal of interest as the signal propagates through the recording room and reflects off walls objects and

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