annotate dsp/mfcc.m @ 61:eff6bddf82e3
tip
Finally implemented perceptual brightness thing.
| author |
samer |
| date |
Sun, 11 Oct 2015 10:20:42 +0100 |
| parents |
c3b0cd708782 |
| children |
|
| rev |
line source |
|
samer@32
|
1 % mfcc - Mel-frequency ceptral coefficients
|
|
samer@32
|
2 %
|
|
samer@32
|
3 % mfcc ::
|
|
samer@32
|
4 % [[M]->[40]] ~'which of 40 available coeffs to return',
|
|
samer@32
|
5 % N:natural ~'analysis window size',
|
|
samer@32
|
6 % [[T]] ~'input signal',
|
|
samer@32
|
7 % nonneg ~'sampling rate'
|
|
samer@32
|
8 % -> [[M,L]] ~'MFCCs for L time slices'.
|
|
samer@32
|
9 function y=mfcc(MX,N,x,fs)
|
|
samer@32
|
10 [pow,fx]=powspec(spdiag(hamming(N,'periodic'))*buffer(x,N,floor(N/2)),2^nextpow2(N+1));
|
|
samer@32
|
11 y=cepstrum(MX,melspace(400/3,min(7000,fs/2),42),fs*fx,pow);
|
|
samer@32
|
12 end
|
