Rayleigh modeling of teager energy operated perceptual wavelet packet coefficients for enhancing noisy speech

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• 作者：Md Tauhidul Islam^a ; ^{tauhid@tamu.edu} ; Celia Shahnaz ; ^b ; ^{celia.shahnaz@gmail.com} ; Wei-Ping Zhu^c ; ^{weiping@ece.concordia.ca} ; M. Omair Ahmad^c ; ^{omair@ece.concordia.ca}
• 关键词：Speech enhancement ; Perceptual wavelet packet transform ; Teager energy ; Rayleigh ; Kullback&ndash ; Liebler divergence
• 刊名：Speech Communication
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：86
• 期：Complete
• 页码：64-74
• 全文大小：4529 K
• 卷排序：86

文摘

A statistical model for determining an adaptive threshold is proposed using Rayleigh distribution function of the teager energy (TE) operated perceptual wavelet packet coefficients. A custom thresholding function is proposed that combines µ-law and semisoft thresholding functions and is able to provide better thresholding than that provided by the thresholding functions described in the literature. Detail simulations have been carried out in order to investigate the performance of the proposed method in terms of objective and subjective senses. The performance of our proposed method is compared with state-of-the-art methods, namely Universal and SMPO. Simulation results show that the proposed method yields consistently better results in the sense of higher output segmental SNR improvement in dB, higher output PESQ, and lower WSS values than those of the existing methods.