The Algorithm of Wavelet-Thresholding Denoising in Speech Encoding
Nian Shi · Microelectronics & Computer · 2009
In order to improve the encoding quality of speech signal and save the resource of bandwidth,we added the method of wavelet-thresholding denoising based on the traditional CVSD coding.We first present soft-thresholding and hard-thresholding denoising methods in wavelet thresholding denoising,then it presents a new thresholding function based on them,we add a factor to the modified project,which can be self-adaptivly reduce the fixed deviation in soft-thresholding function.Subsequently,we encode and decode the speech signal which has been reconstructed based on CVSD.In this paper,we validate the effectiveness and superority of the improved scheme by Matlab simulation.