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From: kunz@hplsle.UUCP (kunz)
Newsgroups: net.audio
Subject: Re: Carver CD Player & Technology
Message-ID: <5000002@hplsle.UUCP>
Date: Tue, 19-Mar-85 19:14:00 EST
Article-I.D.: hplsle.5000002
Posted: Tue Mar 19 19:14:00 1985
Date-Received: Thu, 21-Mar-85 03:35:57 EST
References: <14700008@hpfcms.UUCP>
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Nf-From: hplsle!kunz    Mar 19 17:14:00 1985


> Suppose your input signal is 17,18,17,18,17,18,...
> Whether your extra samples inserted before the digital averaging are
> 0's or repeats of the last sample makes no difference.  You still can
> get out a signal 17,17,17,17,18,18,18,18,17,17,17,17,... from this process,
> UNLESS you drop the lower two bits, in which case it will look flat.

It seems that we hit the topic of dithering... Now you've forced me to
learn something new (again -- I knew it in school).  Yes, I'll agree
that dithering noise in a sampled system can be a real problem and
probably can be eliminated by 16 bit DACs (for CDs) and then 'tossing' the 
LSB's.  This is what you mean, isn't it?  I wonder though, is that signal
down at -90 dB a concern.  I suppose for the purists it is!  :-)

This is a good discussion, I'd like to keep up the technical discussion
of CDs and related audio stuff in this category.  It keeps me up on
things.

--------------------------------------------------------------------------
Bob Kunz
{ihnp4!hplabs!hp-pcd, uw-beaver!fluke}!hplsla!kunz
Hewlett-Packard Lake Stevens Instrument Division
8600 Soper Hill Rd
Everett, Washington 98205-1298
(206) 335-2135