| 结合听觉掩蔽效应的时频自适应小波阈值增强 |
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| 引用本文： | 丁卫,王忠. 结合听觉掩蔽效应的时频自适应小波阈值增强[J]. 计算机工程与设计, 2011, 32(11): 3768-3771,3856 |
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| 作者姓名： | 丁卫 王忠 |
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| 作者单位： | 四川大学电气信息学院,四川成都,610064 |
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| 基金项目： | 国家自然科学基金项目，中国博士后基金项目，四川科技厅应用基础基金项目 |
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| 摘 要： | 针对浊音、清音和噪声的不同特性,结合听觉掩蔽并使用随尺度变化的多阈值对语音信号进行处理.提出了多小波门限估计法,该方法针对不同声音成分,使用不同的与尺度有关的缩小因子调节门限值；通过估计各频带内的信噪比,实现了阈值的时频自适应变化；用巴克小波包分解法模拟人耳临界带特性,用小波谱减法对带噪语音进行预增强,采用Johnst...
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| 关 键 词： | 语音增强 Bark小波包变换 噪声估计 小波阈值处理 掩蔽效应 |
Speech enhancement using time-frequency wavelet threshold with auditory masking |
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| DING Wei,WANG Zhong. Speech enhancement using time-frequency wavelet threshold with auditory masking[J]. Computer Engineering and Design, 2011, 32(11): 3768-3771,3856 |
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| Authors: | DING Wei WANG Zhong |
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| Affiliation: | DING Wei,WANG Zhong(School of Electrical Engineering and Information,Sichuan University,Chengdu 610064,China) |
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| Abstract: | For the different characteristics of voiced speech,unvoiced speech and noise,a multi-threshold with auditory masking de-pendent on the wavelet packet scale is used.Firstly,the multi-threshold estimation based on wavelet is proposed,combined with a variety of methods on threshold estimation changing with the scale.This threshold is adjusted by different reduction factor related to the scale,according to the different components of voice.Secondly,by estimating the signal to noise ratio in different frequency ... |
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| Keywords: | speech enhancement Bark wavelet packet transform noise estimation wavelet threshold processing auditory masking |
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