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 !