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Implementation of Spectogram Code

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Partha
Partha 2014-11-15
编辑： Geoff Hayes 2014-11-15
Is there is any difference between the following codes?
NS = Noisy Signal;
windowsize = 128;
window = hanning(windowsize);nfft = windowsize;noverlap = windowsize-1;
[S_NS F_NS T_NS P_NS] = spectrogram(NS,window,noverlap,nfft,Fs,'yaxis');
AMP_NS = 10*log10(abs(S_NS));
imagesc(T_NS*1e3,F_NS*1e-6,AMP_NS)
and
spectrogram(NS,window,noverlap,nfft,Fs,'yaxis');

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