dec-ep.sh

Reference Implementation of G.711 standard and other voice codecs

#!/bin/bash 
#--------------------------------------------------------------------
# This is an example of how to decimate an FER pattern by a factor
# of 2. In this case, FER patterns designed for 20ms frames are
# converted into EPs for 40ms frames. Utilities bin2asc, asc2bin,
# and sh2chr are available in the unsup directory.
#
# Simao
#--------------------------------------------------------------------

for f in *-20ms.ep 
do 
  bin2asc -h $f | \
  gawk '{print ($1=="2021"||$1=="2120"||$1=="2020")?"6B20":"6B21"}' | \
  asc2bin -h - ${f%-20ms.ep}-40ms.ep.g192
done

for f in *40ms*.g192 
do
 sh2chr $f ${f%.g192} 
done