TY - GEN
T1 - Speech enhancement for nonstationary noises by wavelet packet transform and adaptive noise estimation
AU - Lei, Sheau Fang
AU - Tung, Ying Kai
PY - 2005/12/1
Y1 - 2005/12/1
N2 - This paper proposes a speech enhancement algorithm based on wavelet packet transform and adaptive noise estimation. The wavelet threshold in this algorithm is temporally adapted to SNR variations which can be calculated by adaptive noise estimation. Adaptive noise estimation can be computationally simple and reliable to estimate the noise levels from noisy signal itself without complicated speech pause detection. Thus the proposed algorithm can efficiently suppress the noise while reducing speech distortion. A speech signal corrupted by nonstationary noises is used for the performance evaluation of the proposed algorithm. Experimental results show that the proposed algorithm outperforms the conventional spectral subtraction and other wavelet based denoising approaches for speech enhancement.
AB - This paper proposes a speech enhancement algorithm based on wavelet packet transform and adaptive noise estimation. The wavelet threshold in this algorithm is temporally adapted to SNR variations which can be calculated by adaptive noise estimation. Adaptive noise estimation can be computationally simple and reliable to estimate the noise levels from noisy signal itself without complicated speech pause detection. Thus the proposed algorithm can efficiently suppress the noise while reducing speech distortion. A speech signal corrupted by nonstationary noises is used for the performance evaluation of the proposed algorithm. Experimental results show that the proposed algorithm outperforms the conventional spectral subtraction and other wavelet based denoising approaches for speech enhancement.
UR - http://www.scopus.com/inward/record.url?scp=33847209982&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33847209982&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33847209982
SN - 0780392663
SN - 9780780392663
T3 - Proceedings of 2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005
SP - 41
EP - 44
BT - Proceedings of 2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005
T2 - 2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005
Y2 - 13 December 2005 through 16 December 2005
ER -