基于超高斯激励的噪声顽健语音线性预测分析算法
TN912.3; 针对传统的语音信号线性预测分析算法在噪声环境下性能恶化的问题,提出了一种新的基于超高斯激励的噪声顽健线性预测算法.该算法采用具有超高斯特性的学生 t 分布对语音信号线性预测激励建模,并显式地考虑环境噪声的影响,从而构建语音信号线性预测分析的概率图模型.在此基础上,利用变分贝叶斯的方法求解模型参数的近似后验分布,进而实现对带噪语音线性预测系数的最优估计.实验结果表明,该算法能够有效提高噪声环境下语音信号线性预测分析的顽健性....
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| Published in | 通信学报 no. 5; pp. 62 - 70 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
解放军理工大学 指挥信息系统学院,江苏 南京 210007
2013
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-436X |
| DOI | 10.3969/j.issn.1000-436x.2013.05.007 |
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| Abstract | TN912.3; 针对传统的语音信号线性预测分析算法在噪声环境下性能恶化的问题,提出了一种新的基于超高斯激励的噪声顽健线性预测算法.该算法采用具有超高斯特性的学生 t 分布对语音信号线性预测激励建模,并显式地考虑环境噪声的影响,从而构建语音信号线性预测分析的概率图模型.在此基础上,利用变分贝叶斯的方法求解模型参数的近似后验分布,进而实现对带噪语音线性预测系数的最优估计.实验结果表明,该算法能够有效提高噪声环境下语音信号线性预测分析的顽健性. |
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| AbstractList | TN912.3; 针对传统的语音信号线性预测分析算法在噪声环境下性能恶化的问题,提出了一种新的基于超高斯激励的噪声顽健线性预测算法.该算法采用具有超高斯特性的学生 t 分布对语音信号线性预测激励建模,并显式地考虑环境噪声的影响,从而构建语音信号线性预测分析的概率图模型.在此基础上,利用变分贝叶斯的方法求解模型参数的近似后验分布,进而实现对带噪语音线性预测系数的最优估计.实验结果表明,该算法能够有效提高噪声环境下语音信号线性预测分析的顽健性. |
| Abstract_FL | To overcome the problem that the performance of the traditional linear prediction (LP) analysis of speech dete-riorates significantly in the presence of background noise, a novel algorithm for robust LP analysis of speech based on super-Gaussian excitation was proposed. The excitation noise of LP was modeled as a Student-t distribution, which was shown to be super-Gaussian. Then a novel probabilistic graphical model for robust LP analysis of speech was built by in-corporating the effect of additive noise explicitly. Furthermore, variational Bayesian inference was adopted to approx-imate the intractable posterior distributions of the model parameters, based on which the LP coefficients of the noisy speech were estimated iteratively. The experimental results show that the developed algorithm performs well in terms of LP coefficients estimation of speech and is much more robust to ambient noise than several other algorithms. |
| Author | 张雄伟 赵改华 周彬 邹霞 |
| AuthorAffiliation | 解放军理工大学 指挥信息系统学院,江苏 南京 210007 |
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| DocumentTitle_FL | Noise-robust linear prediction analysis of speech based on super-Gaussian excitation |
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| Keywords | 变分贝叶斯 语音线性预测 super-Gaussian excitation 噪声顽健 noise-robust variational Bayes linear prediction of speech 超高斯激励 |
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| Title | 基于超高斯激励的噪声顽健语音线性预测分析算法 |
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