Presentation 2007-09-28
DCT-EMD Based Hybrid Soft-Thresholding Technique with a Sub-band Approach for Speech Enhancement
Erhan DEGER, M. K. Islam MOLLA, Keikichi HIROSE, Nobuaki MINEMATSU,
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Abstract(in English) This paper presents a two-stage soft-thresholding algorithm based on Discrete Cosine Transform (DCT) and Empirical Mode Decomposition (EMD). In the first stage, noisy speech is decomposed into eight frequency bands and a specific noise variance is calculated for each one. Based on this variance, each band is denoised using soft-thresholding in DCT domain. The remaining noise is eliminated in the second stage through a time domain soft-thresholding strategy adapted to the intrinsic mode functions (IMFs) of the first stage signal. Significantly better SNR improvement and perceptual speech quality results prove the superiority of the proposed algorithm over recently reported techniques.
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Keyword(in English) Speech enhancement / discrete cosine transform / empirical mode decomposition / soft-thresholding
Paper # SIP2007-96,SIS2007-32,SP2007-58
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Committee SIS
Conference Date 2007/9/21(1days)
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Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) DCT-EMD Based Hybrid Soft-Thresholding Technique with a Sub-band Approach for Speech Enhancement
Sub Title (in English)
Keyword(1) Speech enhancement
Keyword(2) discrete cosine transform
Keyword(3) empirical mode decomposition
Keyword(4) soft-thresholding
1st Author's Name Erhan DEGER
1st Author's Affiliation Graduate School of Information Science and Technology The University of Tokyo()
2nd Author's Name M. K. Islam MOLLA
2nd Author's Affiliation Graduate School of Information Science and Technology The University of Tokyo
3rd Author's Name Keikichi HIROSE
3rd Author's Affiliation Graduate School of Information Science and Technology The University of Tokyo
4th Author's Name Nobuaki MINEMATSU
4th Author's Affiliation Graduate School of Frontier Sciences The University of Tokyo
Date 2007-09-28
Paper # SIP2007-96,SIS2007-32,SP2007-58
Volume (vol) vol.107
Number (no) 237
Page pp.pp.-
#Pages 6
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