| 基于压缩感知过程的语音增强 |
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| 引用本文： | 周小星,王安娜,孙红英,杨鸿武.基于压缩感知过程的语音增强[J].清华大学学报(自然科学版),2011(9):1234-1238. |
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| 作者姓名： | 周小星 王安娜 孙红英 杨鸿武 |
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| 作者单位： | 东北大学信息科学与工程学院;西北师范大学物理与电子工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(60875015) |
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| 摘 要： | 压缩感知(compressive sensing,CS)是一种基于信号稀疏性的采样方法,可以有效提取信号中所包含的信息。该文提出了一种基于CS过程的语音增强新算法。算法利用语音在离散余弦变换(discrete cosine transform,DCT)域下的稀疏性,采用Hadamard矩阵对带噪语音进行压缩测量,通过改进的正交匹配跟踪(orthogonal matching pursuit,OMP)算法恢复语音信号,实现语音增强。与经典谱减法和子空间算法进行实验对比分析,结果表明:该算法在降噪性能上优于经典谱减法和子空间算法。
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| 关 键 词： | 语音增强 压缩感知 离散余弦变换 Hadamard矩阵 正交匹配跟踪 |
Speech enhancement based on compressive sensing |
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| ZHOU Xiaoxing,WANG Anna,SUN Hongying,YANG Hongwu.Speech enhancement based on compressive sensing[J].Journal of Tsinghua University(Science and Technology),2011(9):1234-1238. |
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| Authors: | ZHOU Xiaoxing WANG Anna SUN Hongying YANG Hongwu |
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| Institution: | ZHOU Xiaoxing1,WANG Anna1,SUN Hongying2,YANG Hongwu2(1.College of Information Science and Engineering,Northeastern University,Shenyang 110819,China,2.College of Physics and Electronic Engineering,Northwest Norm University,Lanzhou 730070,China) |
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| Abstract: | Compressive sensing(CS) which is a sampling method based on the signal sparseness,can efficiently extract information contained in a signal.This paper presents a speech enhancement algorithm based on CS using a Hadamard matrix to compress the noisy speech using the sparseness of the speech in a discrete cosine transform(DCT).The speech signal is then restored using the modified orthogonal matching pursuit(OMP) by setting the iterative threshold to realize speech enhancement.Tests show that the algorithm out... |
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| Keywords: | speech enhancement compressive sensing discrete cosine transformation Hadamard matrix orthogonal matching pursuit |
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