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Abstract
MATLAB is very powerful and practical engineering software which is used in data
analysis and processing fraction and use it to analysis and process voice signal which is
very convenient。
This paper describes the Matlab environment how to collect and process speech signal
and through example analysis of the speech signal processing in Matlab。
Then take the Matlab simulation of ideal sinusoid texture image and analysis of its
spectrum characteristics for example; basic principles and process of analyzing the texture
image based on Fourier energy spectrum were described。 The program was written for obtaining
spatial domain texture image with ideal sinusoid distribution. And its spectrum
characteristics were analyzed。 Moreover, according to the definition of DFT, a calculation
method of amplitude spectrum for periodic signal is derived in this paper. Through
simulation of amplitude spectrum calculation in MATLAB, the efficiency of the method is
validated to satisfy the need for project。 In the end, the problems of spectrum leakage and
picket fence effect are explained and the corresponding solution is proposed.
Keywords: MATLAB; Spectrum Analysis FFT; signal analysis