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From: ron@brl-sem.ARPA (Ron Natalie <ron>)
Newsgroups: net.analog
Subject: Re: Oversampling in CD players
Message-ID: <175@brl-sem.ARPA>
Date: Tue, 29-Apr-86 11:37:58 EDT
Article-I.D.: brl-sem.175
Posted: Tue Apr 29 11:37:58 1986
Date-Received: Fri, 2-May-86 09:39:17 EDT
References: <241@ur-tut.UUCP> <285@mit-vax.UUCP>
Organization: Ballistic Research Lab (BRL), APG, MD.
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> Every now and then, sombody comes up with some sort of interpolation
> scheme. These invariably warp the spectrum and therefore don't work. The
> point of oversampling is that you have "data to burn" so you can afford
> to miss a few samples here and there.
> 
This is wrong.  The only reason for oversampling (which is really not
really sampling many times but running the output D-to-A's at a higher
rate than the original sampled material) is because good digital filtering
is easier (read CHEAPER) than good analog filtering.

-Ron