exmp2_1.m

用dsp解压mp3程序的算法

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% exmp2_1.m - Code for generate, plot, and save sinewave
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A = 2.0;              % amplitude of sinewave
w0 = 0.2*pi;          % frequency of sinewave
N = 128;              % length of sinewave
n = [0:N-1];          % time index
sn = A*sin(w0*n);     % sine function defined in (2.2.6)
save sn.dat sn -ASCII;% save the sequence in ASCII file
		              % sn.dat for later use
plot(n,sn)            % plot the sinewave
axis([0, 127, -inf, inf])
title('Sinewave');    % title of figure
xlabel('Time index, n'); ylabel('Amplitude');