## MFCC

### 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) (-d1|-d2) 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 coefficients. 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.

**-i** *item*
Select input item number.

**-n** *ncoeff*
Select number of coeffients to calculate. Default: 16.

**-l** *low_frequency*
Specify lowest frequency of filterbank. Default: 0Hz.

**-h** *high_frequency*
Specify highest frequency of filterbank. Default: half input sample rate.

**-r** *frame_rate*
Specify frame rate for output. Default 100 frames/sec.

**-e**
Append the log signal energy to the output frame.

**-F**
Store filter output rather than cepstral coefficents;

**-p**
Do not pre-emphasise signal.

**-d1**
Add first order delta cepstral coeffs to output vector.

**-d2**
Add first and second order delta cepstral coeffs to output vector.

### INPUT ITEMS

*1.xx*
Any speech waveform.

### OUTPUT ITEMS

*11*
Mel-scaled cepstral coefficients.

### VERSION/AUTHOR

1.2 - Mark Huckvale

_{Fri Jul 09 14:54:38 2004
}