/**MAN





























































SFS                     Last change: UCL                        1






MFCC(1)                  USER COMMANDS                    MFCC(1)



NAME
     mfcc - compute mel-scaled cepstral coefficients

SYNOPSIS
     mfcc (-i item) (-n ncoeff) (-l low_freq) (-h high_freq)  (-r
     frame_rate) (-e|-F) (-p) sfsfile

DESCRIPTION
     mfcc designs a mel-scaled filterbank for the supplied number
     of  channels  and  processes the input speech signal through
     the filterbank into a set  of  mel-scaled  cepstral  coeffi-
     cients.  The method is based on that described in Deller, et
     al, Discrete Time Processing of Speech Signals.  It  uses  a
     Hamming  window  and  a  forward  FFT  and and a specialised
     inverse DFT.

     Options and their meanings are:

     -I         Identify program and version number.

     -iitem     Select input item number.

     -nncoeff   Select  number  of   coeffients   to   calculate.
                Default: 16.

     -llow_frequency
                Specify lowest frequency of filterbank.  Default:
                0Hz.

     -hhigh_frequency
                Specify   highest   frequency   of    filterbank.
                Default: half input sample rate.

     -rframe_rate
                Specify  frame  rate  for  output.   Default  100
                frames/sec.

     -e         Store the log signal energy as the  last  coeffi-
                cient.

     -F         Store filter output rather than cepstral  coeffi-
                cents;

     -p         Do not pre-emphasise signal.

INPUT ITEMS
     1.xx       Any speech waveform.

OUTPUT ITEMS
     11         Mel-scaled cepstral coefficients.





SFS                     Last change: UCL                        1






MFCC(1)                  USER COMMANDS                    MFCC(1)



VERSION/AUTHOR
     1.0 - Mark Huckvale */

SOURCE
     /users/mark/sfs/man/../contrib/asr/mfcc.c


















































SFS                     Last change: UCL                        2



