Speech enhancement in short-wave channel based on empirical mode decomposition

Authors:
Li-Ran Shen;Qing-Bo Yin;Xue-Yao Li;Hui-Qiang Wang
Affiliations:
The College Of Computer Science and Technology, Harbin Engineering University, Harbin, China;The College Of Computer Science and Technology, Harbin Engineering University, Harbin, China;The College Of Computer Science and Technology, Harbin Engineering University, Harbin, China;The College Of Computer Science and Technology, Harbin Engineering University, Harbin, China
Venue:
CSR'06 Proceedings of the First international computer science conference on Theory and Applications
Year:
2006

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Abstract

A novel speech enhancement method based on empirical mode decomposition is proposed. The method is a fully data driven approach. Noisy speech signal is decomposed adaptively into oscillatory components called Intrinsic Mode Functions (IMFs) using a process called sifting. The empirical mode decomposition denoising involves thresholding each IMFs. A nonlinear function is introduced for amplitude thresholding. And then reconstructs the estimated speech signal using the processed IMFs. The experimental results show significant improvement in output SNR and quality as compared to recently reported results.