New Wavelet Shrinkage De-Noising Thresholding Technique for Speech Enhancement

Wavelet shrinkage de-noising provides a new way to reduce noise present in signals. The wavelet has ability to analyze different parts of signal at different scales. The author reviews the wavelet shrinkage de-noising principal and different thresholding techniques. This paper compares the performance of different thresholding technique used in wavelet shrinkage de-noising for speech enhancement. A new thresholding technique is proposed which performs better compared to existing thresholding technique. The enhanced speech quality is measured using metric segmental- SNR.