**2. Lifting wavelet transform (***LWT***)**

The Lifting Wavelet Transform (*LWT*) becomes a powerful tool for signal analysis due to its effective and faster implementation compared to the Discrete Wavelet Transform (*DWT*). In the domains of the signal denoising, signal compression and watermarking, the *LWT* permits to obtain better results compared to the *DWT* . The *LWT* permits to saves times and has a better frequency localization *Speech Enhancement Based on LWT and Artificial Neural Network and Using MMSE Estimate… DOI: http://dx.doi.org/10.5772/intechopen.96365*

feature that overcomes the shortcomings of *DWT*. The Signal decomposition using *LWT* needs three steps: splitting, prediction and update.
