Speech enhancement using weighting function based on the variance of wavelet coefficients

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題名:	Speech enhancement using weighting function based on the variance of wavelet coefficients
作者:	陸清達;Lu, Ching-Ta;王小川;Wang, Hsiao-Chuan
貢獻者:	資訊傳播學系
日期:	2003.09
上傳時間:	2013-12-26 10:31:01 (UTC+0)
摘要:	There are few works on the problem of heavy noise corruption in wavelet-based speech enhancement. In this paper, a new method is introduced to adapt the weighting function for wavelet coefficients (WCs) in each subband. The idea is based on that the change of WC variance in speech-dominated frames is larger than the change of WC variance in noise-dominated frames. We can define a weighting function for WCs in each subband so that WCs are preserved in speech-dominated frames and reduced in noise-dominated frames. Then a weighting function in terms of WC's variance is derived. The experimental results show that the proposed method is more robust than that of SNR adjusted speech enhancement system.
關聯:	2003 European Conference on Speech Communication and Technology
顯示於類別:	[資訊傳播學系] 會議論文

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