文章基本信息

标题：An Improved Speech Enhancement Method based on Teager Energy Operator and Perceptual Wavelet Packet Decomposition
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作者：Zhao, Huan ; Peng, Xiujuan ; Hu, Lian 等
期刊名称：Journal of Multimedia
印刷版ISSN：1796-2048
出版年度：2011
卷号：6
期号：3
页码：308-315
DOI：10.4304/jmm.6.3.308-315
语种：English
出版社：Academy Publisher
摘要：According to the distribution characteristic of noise and clean speech signal in the frequency domain, a new speech enhancement method based on teager energy operator (TEO) and perceptual wavelet packet decomposition (PWPD) is proposed. Firstly, a modified Mask construction method is made to protect the acoustic cues at the low frequencies. Then a level-dependent parameter is introduced to further adjust the thresholds in light of the noise distribution feature. At last the sub-bands which have very little influence are set directly 0 to improve the signal-to-noise ratio (SNR) and reduce the computation load. Simulation results show that, under different kinds of noise environments, this new method not only enhances the signal-to-noise ratio (SNR) and perceptual evaluation of speech quality (PESQ), but also reduces the computation load, which is very advantageous for real-time realizing.
关键词：speech enhancement;perceptual wavelet packet decomposition;time adapted threshold;teager energy operator