A new approach for speech enhancement based on the adaptive thresholding of the wavelet packets

2006 ◽  
Vol 48 (8) ◽  
pp. 927-940 ◽  
Author(s):  
Yasser Ghanbari ◽  
Mohammad Reza Karami-Mollaei
Keyword(s):  
Speech Enhancement ◽  
Wavelet Packets ◽  
Adaptive Thresholding ◽  
New Approach

The Energy Distribution of Tire-Road Noise and Noisy Speech Based on Wavelet Packet

2011 ◽  
Vol 464 ◽  
pp. 721-724 ◽  
Author(s):  
Zhi Yong He ◽  
Li Heng Luo
Keyword(s):  
Energy Distribution ◽  
Speech Enhancement ◽  
Mobile Communications ◽  
Wavelet Packet ◽  
Noise Signal ◽  
Wavelet Packets ◽  
Road Noise ◽  
Noisy Speech ◽  
Time Frequency ◽  
The Difference

Speech enhancement is very important for mobile communications or some other applications in car. The energy distribution of signal is the basis of algorithms which denoise noisy speech in time-frequency domain. In this work, the noise regarded is the tire-road noise when driving in expressway. Wavelet packets transform is used in the analysis. After decomposing noise signal and noisy speech signal by wavelet packet transform, the analysis for the difference of the energy distribution between noisy speech and noise is finished.

The Properties of Orthogonal Nonseparable Four-Dimensional Wavelet Packets

2010 ◽  
Vol 439-440 ◽  
pp. 944-949 ◽  
Author(s):  
Yong Jian Liu
Keyword(s):  
Iteration Method ◽  
Wavelet Packets ◽  
New Approach

In this article, the notion of orthogonal nonseparable four-dimensional wavelet packets, which is the generalization of orthogonal univariate wavelet packets, is introduced. A new approach for constructing them is presented by iteration method. The orthogonality properties of four-dimensional wavelet packets are discussed. Three orthogonality formulas concerning these wavelet packets are estabished.

The Fine Characters of a Sort of Biorthogonal Four-Dimensional Nonseparable Wavelet Packs

2010 ◽  
Vol 159 ◽  
pp. 7-12
Author(s):  
Hong Lin Guo ◽  
Yu Min Yu
Keyword(s):  
Iteration Method ◽  
Wavelet Packets ◽  
Sufficient Condition ◽  
Necessary And Sufficient Condition ◽  
Wavelet Frames ◽  
New Approach ◽  
Decomposition Scheme ◽  
Necessary And Sufficient

In this article, the notion of orthogonal nonseparable four-dimensional wavelet packs, which is the generalization of orthogonal univariate wavelet packs, is introduced. A new approach for constructing them is presented by iteration method and wavelets as well wavelet frames. The biorthogonality properties of four-dimensi- -onal wavelet packets are discussed. Three biorthogonality formulas concerning these wavelet packs are estabished. A necessary and sufficient condition for the existence of the pyramid decomposition scheme of space is presented.

The Nice Characters of Biorthogonal Four-Element Wavelet Packets with Two-Scale

2011 ◽  
Vol 460-461 ◽  
pp. 351-356
Author(s):  
Yu Li ◽  
Jin Shun Feng
Keyword(s):  
Iteration Method ◽  
Wavelet Packets ◽  
Constructive Method ◽  
Biorthogonal Wavelet ◽  
New Approach ◽  
Novel Approach ◽  
Affine Frames

In this article, the notion of orthogonal nonseparable four-dimensional wavelet packets, which is the generalization of orthogonal univariate wavelet packets, is introduced. A new approach for constructing them is presented by iteration method. A novel approach for constructing two-directional biorthogonal wavelet packets is developed. The biorthogonality property of four-dimensional wavelet packets is discussed. Three biorthogonality formulas concerning these wavelet packets are estabished. A constructive method for affine frames of is proposed.

The Optimal Intelligent Algorithm on Orthogonal Five-Variate Wavelet Packets

2010 ◽  
Vol 168-170 ◽  
pp. 1377-1380
Author(s):  
Lan Li
Keyword(s):  
Iteration Method ◽  
Wavelet Packets ◽  
Intelligent Algorithm ◽  
New Approach

In this article, the notion of orthogonal nonseparable four-dimensional wavelet packets which is the generalizaion of orthogonal univariate wavelet packets is introduced. A new approach for constructing them is presented by iteration method. The orthogonality properties of five-dimensional wavelet packets are discussed. Three orthogonality formulas concerning these wavelet packets are estabished.

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