COMPAND
NAME
compand -- compand (compress dynamic range) speech signals
SYNOPSIS
compand
(-r dbrange) (-c mu-value) (-i item) file
DESCRIPTION
compand
is a program to demonstrate the effects of dynamic range
compression on speech signals. The normal dynamic range of a
16-bit signal (90dB) can be compressed by non-linear amplitude
mapping either (i) to a smaller dynamic range, or (ii) to a
mu-law compression function: outmag = log(1+mu*inpmag)/log(1+mu).
Options
and their meanings are:
-I
Identify program and exit.
-i item
Select input item.
-r dbrange
Select dynamic range compression. Default 90dB. Maximum 90dB.
-c mu-value
Select mu-law compression. Mild compression mu=10. Strong compression
mu=100.
INPUT ITEMS
1.xx
Any speech item.
OUTPUT ITEMS
SPEECH
Companded signal.
HISTORY
dbrange=
Output dynamic range.
mu=
Mu-law compression value.
VERSION/AUTHOR
1.1 - Mark Huckvale.
Fri Jul 09 14:54:37 2004