A New Speech Enhancement Method Based On Wavelet Packet Transform

In this paper, a new speech enhancement algorithm based on the wavelet packet transform is proposed to suppress the noise. Before decomposing the noisy speech into componets by the wavelet space, we select and construct a new window function, which is smoother than the Hamming window in frequency do...

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Main Authors: Wang, Jizeng, Wang, Chanfei
Format: Conference Proceeding
Language:English
Subjects:
Frequency domain analysis
Inspection
Partitioning algorithms
Spectrogram
Speech enhancement
Speech processing
Wavelet coefficients
Wavelet domain
Wavelet packets
Wavelet transforms
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Wang, Chanfei
description In this paper, a new speech enhancement algorithm based on the wavelet packet transform is proposed to suppress the noise. Before decomposing the noisy speech into componets by the wavelet space, we select and construct a new window function, which is smoother than the Hamming window in frequency domain to process the frame's partition, in order to improve the wavelet thresholding performance in the wavelet domain, we define a new parameter to adapt in time the thresholds according to a nonlinear function of the wavelet coefficient energies. Experimental results show that the proposed approach improves the naturalness, and does not cause annoying residual noise in the enhanced speech. Visual inspection of spectrograms and listening experiments are used to support the results.
doi_str_mv 10.1109/CISP.2008.410
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identifier ISBN: 9780769531199
ispartof 2008 Congress on Image and Signal Processing, 2008, Vol.4, p.261-265
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subjects Frequency domain analysis
Inspection
Partitioning algorithms
Spectrogram
Speech enhancement
Speech processing
Wavelet coefficients
Wavelet domain
Wavelet packets
Wavelet transforms
title A New Speech Enhancement Method Based On Wavelet Packet Transform
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