FILTBANK
NAME
filt - general purpose filterbank analysis
SYNOPSIS
genfilt
(-i item) (-n numfilt) (-o order) (-r rate) (-3) file
DESCRIPTION
filterbank
is a program to design and apply a general linear filterbank
to a signal.
In normal model
filtbank
uses N bandpass filters linearly spaced of equal size
with matching 3dB points between 50Hz and (Fs/2)-50Hz.
In Third Octave mode (-3 switch)
filtbank
uses N constant Q filters of one-third octave spacing
starting at 100Hz.
Note that fewer than N third-octave filters may be
possible.
OPTIONS
-I
Identify program name and version number.
-i item
Select input item number.
-n numfilt
Select number of filters >= 2. Default 16.
-o order
Select filter order. Default 4. Maximum is 20.
-r rate
Output frame rate required. Energies are rectified then low-pass filtered
at half this rate before sampling.
-3
Use third-octave filters.
INPUT ITEMS
SP
Any speech item
LX
(optional) Any Lx item
OUTPUT ITEMS
CO
Filterbank energies.
HISTORY
numfilt=
number of filters
order=
order of filters
rate=
output frame rate
type=
third-octave
VERSION/AUTHOR
2.1
Mark Huckvale
BUGS
Fri Jul 09 14:54:34 2004