请问如何调用这个函数提取MFCC参数？（有说明）

asaisaio

[y, sr, nbits] = wavread( 'filename.wav' );
...
for i = 1 : framenumber
        将第 i 帧存储至向量 x 中，帧长为 framelength;
        【调用 melfcc 函数提取第 i 帧（即x）的12维特征参数;】
end
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我的问题是，我看不懂下面这个函数说明，因此不会使用这个现成的 melfcc 函数，导致不会写上面那条函数调用语句“【调用 melfcc 函数提取第 i 帧（即x）的12维特征参数;】”
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函数说明如下：>> help melfcc
[cepstra,aspectrum,pspectrum] = melfcc(samples, sr[, opts ...])
   Calculate Mel-frequency cepstral coefficients by:
    - take the absolute value of the STFT
    - warp to a Mel frequency scale
    - take the DCT of the log-Mel-spectrum
    - return the first <ncep> components
   This version allows a lot of options to be controlled, as optional
   'name', value pairs from the 3rd argument on: (defaults in parens)
     'wintime' (0.025): window length in sec
     'hoptime' (0.010): step between successive windows in sec
     'numcep'     (13): number of cepstra to return
     'lifterexp' (0.6): exponent for liftering; 0 = none; < 0 = HTK sin lifter
     'sumpower'    (1): 1 = sum abs(fft)^2; 0 = sum abs(fft)
     'preemph'  (0.97): apply pre-emphasis filter [1 -preemph] (0 = none)
     'dither'      (0): 1 = add offset to spectrum as if dither noise
     'minfreq'     (0): lowest band edge of mel filters (Hz)
     'maxfreq'  (4000): highest band edge of mel filters (Hz)
     'nbands'     (40): number of warped spectral bands to use
     'bwidth'    (1.0): width of aud spec filters relative to default
     'dcttype'     (2): type of DCT used - 1 or 2 (or 3 for HTK or 4 for feac)
     'fbtype'  ('mel'): frequency warp: 'mel','bark','htkmel','fcmel'
     'usecmp'      (0): apply equal-loudness weighting and cube-root compr.
     'modelorder'  (0): if > 0, fit a PLP model of this order
     'broaden'     (0): flag to retain the (useless?) first and last bands
     'useenergy'   (0): overwrite C0 with true log energy
  The following non-default values nearly duplicate Malcolm Slaney's mfcc
  (i.e. melfcc(d,16000,opts...) =~= log(10)*2*mfcc(d*(2^17),16000) )
        'wintime': 0.016
      'lifterexp': 0
        'minfreq': 133.33
        'maxfreq': 6855.6
       'sumpower': 0
  The following non-default values nearly duplicate HTK's MFCC
  (i.e. melfcc(d,16000,opts...) =~= 2*htkmelfcc(:,[13,[1:12]])'
   where HTK config has PREEMCOEF = 0.97, NUMCHANS = 20, CEPLIFTER = 22,
   NUMCEPS = 12, WINDOWSIZE = 250000.0, USEHAMMING = T, TARGETKIND = MFCC_0)
      'lifterexp': -22
         'nbands': 20
        'maxfreq': 8000
       'sumpower': 0
         'fbtype': 'htkmel'
        'dcttype': 3