annotate dsp/cepstrum.m @ 47:82075c94eed1
adding a bunch of stuff, including graphics and pitch toolboxes.
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samer |
| date |
Sat, 17 Jan 2015 15:20:35 +0000 |
| parents |
c3b0cd708782 |
| children |
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line source |
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samer@32
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1 % cepstrum - generalised cepstral coefficients from warped power spectrogram
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2 %
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3 % cepstrum ::
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4 % [[M]->[K]] ~'which coefficients to compute',
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5 % [[K]] ~'edges for (K-2)-band filterbank',
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6 % [[N]] ~'centre frequencies of spectrum bins',
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7 % [[N,T]] ~'input spectra',
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8 % -> [[M,T]] ~'MFCCs for L time slices'.
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9 function y = cepstrum(MX,edges,fx,x)
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10 melW = tri_filterbank(edges,fx);
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11 dctW = dct(eye(size(melW,1)));
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12 y = dctW(MX,:)*log(melW*x);
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13 end
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