Wavelet analysis of speech signal

This paper concerns the issue of wavelet analysis of signals by continuous and discrete wavelet transforms (CWT – Continous Wavelet Transform, DWT – Discrete Wavelet Transform). The main goal of our work was to develop a program which, through the CWT and the DWT analyses, would obtain graph of time-scale changes and would transform it into the spectrum, that is a graph of frequency changes. In this program we also obtain spectra of Fourier Transform and Linear Prediction. Owing to this, we can compare the Wavelet Transform results to those from the Fourier Transform and Linear Prediction.