Noisy Speech Enhancement Using Soft Thresholding on Selected Intrinsic Mode Functions

Signal Processing: An International Journal

Noureddine Ellouze¹  Aïcha Bouzid¹  Hadhami Issaoui¹ 

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关键词: Empirical Mode Decomposition;    Speech Enhancement;    Soft thresholding;    Mode-Selection;   

DOI  :  

学科分类：物理（综合）

来源: Computer Science Journals

【 摘 要 】

In this paper, a new speech enhancement method is introduced. It is essentially based on the Empirical Mode Decomposition technique (EMD) and a soft thresholding approach applied on selected modes. The proposed method is a fully data driven approach. First the noisy speech signal is decomposed adaptively into intrinsic oscillatory components called Intrinsic Mode Functions (IMFs) by using a time decomposition called sifting process. Second, selected IMFs are soft thresholded and added to the remaining IMFs with the residue to reconstitute the enhanced speech signal. The proposed approach is evaluated using speech signals from NOISEUS database corrupted with additive white Gaussian noise. Our algorithm is compared to other state of the art algorithms.

【 授权许可】

Unknown