exmp2_10.m

用dsp解压mp3程序的算法

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% exmp2_10.m - Generate and check the mean (0) and 
%              variance (1) of white noise
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N = 1024;                      % length of sequence
vn = (rand(1,N)-0.5)*sqrt(12); % zero-mean, unit variance
mx = mean(vn)                  % check if mean = 0?
variance = std(vn,1)^2         % check if variance = 1?