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spectogram
2008 May 31
0
FFT Resampler spectrograms
...MATLAB snippet:
fnames={'chirp','perfect','block','filter'}
for k=1:length(fnames)
fn=fnames{k};
myfile=fopen([fn, '.fl'], 'r', 'ieee-le');
x=fread(myfile, Inf, 'float32', 0, 'ieee-le');
fclose(myfile);
X=specgram(x,2048,1,kaiser(2048,14));
spectrogram_floor=-96;
pcolor(max(spectrogram_floor,20*log10(abs(X(end:-1:1,:)))));
shading flat
colorbar
print('-dpng','-r300', [fn, '.png'])
end
['Done']
I've posted the output for the filter-based and block-based...