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arXiv 1609.09231cs.SD
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基于在线估计字典的低秩稀疏分析语音增强

Low Rank and Sparsity Analysis Applied to Speech Enhancement via Online Estimated Dictionary

Pengfei Sun, Jun Qin

摘要:

提出了一种基于在线估计字典的单通道语音增强算法,该算法主要针对低秩稀疏矩阵分解。在该算法中,带噪语音谱矩阵被认为是低秩背景噪声分量和在线语音词典的激活的总和,在其上施加低秩和稀疏性约束。这种分解利用了局部估计字典对语音分量的高表达能力。该算法利用语音幅度谱的广义Gamma先验,通过期望最大化算法估计语音的存在概率,得到局部字典。实验结果表明,与其他四种语音增强算法相比,该算法具有明显的性能改善。

英文摘要:

We propose an online estimated dictionary based single channel speech enhancement algorithm, which focuses on low rank and sparse matrix decomposition. In this proposed algorithm, a noisy speech spectral matrix is considered as the summation of low rank background noise components and an activation of the online speech dictionary, on which both low rank and sparsity constraints are imposed. This decomposition takes the advantage of local estimated dictionary high expressiveness on speech components. The local dictionary can be obtained through estimating the speech presence probability by applying Expectation Maximal algorithm, in which a generalized Gamma prior for speech magnitude spectrum is used. The evaluation results show that the proposed algorithm achieves significant improvements when compared to four other speech enhancement algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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