ccldtmr/Signal_Denoising_using_wavelet_transform

In our project we are proposing a real time de-noising algorithm for audio signals based on the Wavelet Transform. White noise is omnipresent in the spectrum and is thus especially hard to filter. We use the locality of the wavelet function to single out the frequency domains of the signal itself and thereby able to de-noise it. Perfect denoising is not easy, the higher the threshold coefficient is set, the more the noise is detected, but the more the original signal is affected as well. We have implemented a flexible framework for denoising that includes hard and soft thresholding and different Wavelet Transforms. The presented de-noising algorithm is a comparative study of four different Wavelets and two Thresholds.

MATLAB