| 改进型短时对数谱的语音增强算法的DSP实现 |
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| 引用本文： | 畅通,杜栓义.改进型短时对数谱的语音增强算法的DSP实现[J].现代电子技术,2007,30(5):166-168. |
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| 作者姓名： | 畅通 杜栓义 |
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| 作者单位： | 西安电子科技大学,ISN国家重点实验室,陕西,西安,710071 |
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| 摘 要： | 通过研究单通道条件下基于语音短时对数谱的最小均方误差（MMSE—LSA）估计的语音增强算法，简化了算法难度，改进了实时性。引入了最佳修正短时对数谱估计，能在信号存在的不确定性下最小化语音信号对数谱的均方误差。试验证明此方法的语音增强效果较好，尤其在较低信噪比时效果更明显。算法用浮点DSP TMS320VC33实现，能有效抑制背景噪声。
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| 关 键 词： | 语音增强 短时对数谱 最小均方误差 DSP |
| 文章编号： | 1004-373X（2007）05-166-03 |
| 收稿时间： | 2006-09-06 |
| 修稿时间： | 2006年9月6日 |
Implementing a Speech Enhancement with Optimally Modified Short Time Log Spectral Amplitude Estimator on DSP |
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| CHANG Tong,DU Shuanyi.Implementing a Speech Enhancement with Optimally Modified Short Time Log Spectral Amplitude Estimator on DSP[J].Modern Electronic Technique,2007,30(5):166-168. |
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| Authors: | CHANG Tong DU Shuanyi |
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| Affiliation: | CHANG Tong, DU Shuanyi ( National Key Lab. of Integrated Services Network, Xidian University, Xi＇ an, 710071, China ) |
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| Abstract: | In this paper,the authors study the speech enhancement algorithm based on Minimum Mean Square Error short time Log Spectral Amplitude estimation(MMSE-LSA) under the single channel condition,and simplify the algorithm in order to improve the real-time processing.We introduce an optimally-modified log spectral amplitude estimator,which minimizes the mean-square error of the log spectra for speech signals under signal presence uncertainty.Experiments show that the performance of the algorithm enhances the speech very well,especially in the conditions of low SNR.The algorithm is implemented on DSP TMS320VC33,and it can efficiently decrease background noise. |
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| Keywords: | DSP |
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