WANG Xiaofei, GUO Yanmeng, FU Qiang, et al., “Speech Enhancement Using Multi-channel Post-Filtering with Modified Signal Presence Probability in Reverberant Environment,” Chinese Journal of Electronics, vol. 25, no. 3, pp. 512-519, 2016, doi: 10.1049/cje.2016.05.017
Citation: WANG Xiaofei, GUO Yanmeng, FU Qiang, et al., “Speech Enhancement Using Multi-channel Post-Filtering with Modified Signal Presence Probability in Reverberant Environment,” Chinese Journal of Electronics, vol. 25, no. 3, pp. 512-519, 2016, doi: 10.1049/cje.2016.05.017

Speech Enhancement Using Multi-channel Post-Filtering with Modified Signal Presence Probability in Reverberant Environment

doi: 10.1049/cje.2016.05.017
Funds:  This work is supported by the National Natural Science Foundation of China (No.11161140319, No.91120001, No.61271426), the Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDA06030100, No.XDA06030500), the National High Technology Research and Development Program of China (863 Program) (No.2012AA012503) and the Chinese Academy of Sciences Priority Deployment Project (No.KGZD-EW-103-2).
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  • Corresponding author: FU Qiang received the Ph.D. degree in electronic engineering from Xidian University, Xian, in 2000. From 2001 to 2002, he was working as a senior research associate in Center for Spoken Language Understanding (CSLU), OGI School of Science and Engineering at Oregon Health & Science University, Oregon, USA. From 2002 to 2004, he was working as a senior postdoctoral research fellow in Department of Electric and Computer Engineering, University of Limerick, Ireland. He is currently a professor in Institute of Acoustics, Chinese Academy of Sciences, China. His research interests are in speech analysis, microphone array processing, far-distant speech recognition, audio-visual signal processing, machine learning for signal processing, etc. Dr. Qiang Fu is a member of IEEE Signal Processing Society.
  • Received Date: 2014-04-15
  • Rev Recd Date: 2014-09-09
  • Publish Date: 2016-05-10
  • In this paper, a multi-channel post-filtering approach in reverberant environment based on detection and estimation scheme is presented. A modified Signal presence probability (SPP), which is in consideration of reverberation, is proposed with a novel estimator Direct-toreverberate ratio (DRR) to adapt to distant-talking scene. SPP is known a key estimator to instruct the updating of transient noise or residual directional interference and form gain function in the time-frequency domain, consequently a new desired signal detection scheme is proposed to improve its accuracy. Appropriate spectral enhancement technique is applied to the noisy speech signal taking advantage of the modified SPP estimator. The proposed multi-channel post-filtering is tested in different nonstationary noisy and reverberant environments. Experimental results show that it achieves considerable improvement on signal preservation of the desired speech with more noise reduction over the comparative algorithms.
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