Journal of System Simulation ›› 2016, Vol. 28 ›› Issue (7): 1622-1627.

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Eigen-value Combination Approach for Speech Enhancement

Lu Huijuan1, Liu Yaqing1, Liu Yanqiu1, Guan Wei2   

  1. 1. College of Information Engineering, China Jiliang University, Hangzhou 310018, China;
    2. College of Moder Science and Technology, China Jiliang University, Hangzhou 310018, China
  • Received:2014-08-12 Revised:2015-02-01 Online:2016-07-08 Published:2020-06-04

Abstract: In order to further suppress noise, a kind of speech enhancement algorithm based on Eigen-value merge was proposed. Eigen-values combination was used to improve the speech quality on the basis of the classic embedded pre-whitening subspace methods. The study shows that, after decomposing the covariance matrix of speech signals with noise, the larger Eigen-value component mainly includes speech information, and the smaller Eigen-value component mainly contains noise. Sorted by Eigen-values from small to big, the adjacent large Eigen-value component replaces with small Eigen-value component, which can effectively suppress noise and improve the quality of speech. Compared with other speech enhancement algorithm, this algorithm based on Eigen value merger can work effectively in a variety of noisy environment, significantly improves the SNR, and has better speech intelligibility.

Key words: speech enhancement, subspace method, eigen-value decomposing, speech quality

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