Mercurial > hg > ishara

view dsp/mfcc.m @ 42:ae596261e75f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Various fixes and development to audio handling
author samer
date Tue, 02 Dec 2014 14:51:13 +0000
parents c3b0cd708782
children
line wrap: on
line source
% mfcc - Mel-frequency ceptral coefficients
%
% mfcc ::
%    [[M]->[40]] ~'which of 40 available coeffs to return',
%    N:natural ~'analysis window size',
%    [[T]]     ~'input signal',
%    nonneg    ~'sampling rate'
% -> [[M,L]]   ~'MFCCs for L time slices'.
function y=mfcc(MX,N,x,fs)
	[pow,fx]=powspec(spdiag(hamming(N,'periodic'))*buffer(x,N,floor(N/2)),2^nextpow2(N+1));
	y=cepstrum(MX,melspace(400/3,min(7000,fs/2),42),fs*fx,pow);
end