Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ukma!gatech!eedsp!bessel.eedsp.gatech.edu!jensen From: jensen@bessel.eedsp.gatech.edu (P. Allen Jensen) Newsgroups: comp.dsp Subject: Re: Adjust-Speed CD player?? Message-ID: <474@eedsp.gatech.edu> Date: 29 Sep 89 21:41:12 GMT References: <3441@abaa.UUCP> <6028@jpl-devvax.JPL.NASA.GOV> <89255.105143P85025@BARILVM.BITNET><7767@microsoft.UUCP> <89264.171306P85025@BARILVM.BITNET> <7813@microsoft.UUCP> Sender: news@eedsp.gatech.edu Reply-To: jensen@bessel.eedsp.gatech.edu (P. Allen Jensen) Organization: Georgia Institute of Technology Lines: 16 An FFT can be done in real-time if you assume that real-time can include a delay between input and output for startup. Then you get the first set of samples, do the FFT and get the next set of samples in paralle. The FFT must be done in less than or equal to the time to get the first set of samples. You then have a pipeline doing FFT and getting the next set of samples with a delay of one window (frame) time. Anyone see any problems with that ? P. Allen Jensen Georgia Tech, School of Electrical Engineering, Atlanta, GA 30332 USENET: ...!{allegra,hplabs,ihnp4,ulysses}!gatech!eedsp!jensen INTERNET: jensen@eedsp.gatech.edu