Copyright (c) 1992 by Harald Ljoen, Norwegian Telecom Research.
   This code may be used and redistributed as described in the terms of the GNU
   General Public Licence as published by the Free Software Foundation.


pcmAlaw

   Purpose:    convert from linear or u-law PCM to and from A-law PCM
   Reference:  CCITT recommendation G.711
   Author:     Harald Ljoen, Norwegian Telecom Research
               E-mail: harald.ljoen@tf.tele.no, or hlj@nta.no
               Phone: +47 63 80 91 70, Fax: +47 63 81 00 76