Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!psuvax1!wuarchive!cs.utexas.edu!uunet!mcsun!sunic!draken!d88-jwa
From: d88-jwa@nada.kth.se (Jon W{tte)
Newsgroups: comp.dsp
Subject: Re: how oversampling works
Message-ID: <1809@draken.nada.kth.se>
Date: 28 Sep 89 14:44:35 GMT
References:  <1737@draken.nada.kth.se> <2757@phred.UUCP>
Reply-To: d88-jwa@nada.kth.se (Jon W{tte)
Distribution: rec.audio
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 22

In article <2757@phred.UUCP> jefft@phred.UUCP (Jeff Taylor) writes:
>In article <1737@draken.nada.kth.se> d88-jwa@nada.kth.se (Jon W{tte) writes:

>>The solution is to "fake" a higher sample pitch, causing the CD to
>>interpolate the samples between the actual samples. The waveform

>For every problem there is a simple, wrong,  solution. (sorry)

>Linear Interpolation introduces disortion (changes the spectrum).
>[which can be componsated for in a digital filter].  Adding zeros does not.
>(plus the calculations are so simple).  

[ Long description of bandwidth inverting/shifting and adding zeros ]

Ahem.. Yes, you might be right. Or the CD players use a curve-fitting
algorythm. Your method is, of course, theoretically correct, but do you
KNOW that this is the way it's done in a CD ? I remember hearing something
else...

h+@nada.kth.se
-- 
Say, kids, what time is it ? -It's time for a house !