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Path: utzoo!watmath!watdcsu!herbie
From: herbie@watdcsu.UUCP (Herb Chong, Computing Services)
Newsgroups: net.audio
Subject: Re: Digital companding and dynamic range (followup to Shaun)
Message-ID: <509@watdcsu.UUCP>
Date: Mon, 15-Oct-84 14:16:33 EDT
Article-I.D.: watdcsu.509
Posted: Mon Oct 15 14:16:33 1984
Date-Received: Tue, 16-Oct-84 05:10:27 EDT
References: <569@ucbtopaz.CC.Berkeley.ARPA>, <570@ucbtopaz.CC.Berkeley.ARPA>
Organization: U of Waterloo, Ontario
Lines: 17

For those that are interested, dbx makes a delta-modulation PCM 
encoder/decoder that is capable of more dynamic range than a 16-bit
linear encoding can.  I believe that it is a 12-bit system, but I may
be wrong.  It is not terribly popular because it is incompatible with
everything else on the market.  I do not know how many bits they use
in the A/D and D/A converters, but they store fewer bits than used
by the converters.  For those that don't know, a delta-modulation
system records the difference signal between successive samples and
saves them onto the storage medium.  The dbx unit attaches to a VCR.

Herb...
Once a hack, always a hack...

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