annotate arrows/dsp/apow2melspec.m @ 61:eff6bddf82e3
tip
Finally implemented perceptual brightness thing.
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samer |
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Sun, 11 Oct 2015 10:20:42 +0100 |
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672052bd81f8 |
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line source |
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samer@0
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1 % apow2melspec - arrow from power spectra to log mel spectra
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2 %
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3 % apow2melspec ::
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4 % N:natural ~'size of FFT used to compute spectra',
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5 % nonneg ~'sampling frequency',
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6 % [[1,2]->freq] ~'upper and lower frequency limits',
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7 % L:natural ~'number of mel bands to compute'
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8 % -> arrow( {[[dftbins(N)]]}, {[[L]]}, empty).
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9
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10 function o=apow2melspec(N,fs,flim,L)
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11 melW = tri_filterbank_aa(melspace(flim(1),min(flim(2),fs/2),L+2),binmap(0,fs/2,dftbins(N)));
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12 o=arr(@cc);
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13 function y=cc(x), y = log(melW*x+5e-9); end
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14 end
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