Xref: utzoo comp.compression:351 alt.comp.compression:210
Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!ugle.unit.no!agulbra
From: agulbra@siri.unit.no (Arnt Gulbrandsen)
Newsgroups: comp.compression,alt.comp.compression
Subject: Re: Compression of 16-bit sound files.
Message-ID: <1991Apr15.132014.20432@ugle.unit.no>
Date: 15 Apr 91 13:20:14 GMT
References: <rog.670692773@system> <1991Apr11.141742.13069@mintaka.lcs.mit.edu>
Sender: news@ugle.unit.no
Organization: University of Trondheim
Lines: 10


  Most sound data doesn't include much in the top octave, so you can
compress the sound data to a bit over 50% by adding together two
items. The result needs one bit more, has half as may items and sounds
much the same. 16-bit 44kHz becomes 17-bit 22kHz (or 18-bit 11kHz, but
then the signal starts to deteriorate.)

Arnt Gulbrandsen,
University of Trondheim, Norway
agulbra@siri.unit.no