A new psycho-acoustic model For MPEG1 layer 3 coder using A dynamic Gammachirp wavelet

In this paper, we present an approach for the psycho-acoustic analysis of musical signals based on the Gammachirp wavelet packet transform following the model used in the standard MPEG-1 audio layer 3.The proposed method mimics the multiresolution properties of the human ear closer than other techniques and it includes simultaneous and temporal auditory masking. Its important characteristic is to propose an analysis of the frequency bands that come closer to the critical bands of the ear.This study shows the best performance of the Gammachirp coder