Article View: comp.dsp
Article #431Re: Hartley xform
From: Kok Chen
Date: Wed, 04 Oct 1989 23:45
Date: Wed, 04 Oct 1989 23:45
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steve+@andrew.cmu.edu (Stephen Webster) writes: >* The FHT uses a purely real kernel (sin + cos) instead of the FFT's >imaginary kernel (sin + j cos). (Yes, ``j'', dammit. I'm an engineer.) ^^^^^^^^^ ^^^ ^^^ But... even engineers use (cos + i sin) as the kernel instead of (sin + i cos), I hope! :-) :-) :-) And, don't forget the real part of the complex kernel. I.e., exp(0) = 1, not sqrt( -1 ). Regards (from an engineer), Kok Chen kchen@apple.COM Apple Computer, Inc. -- ---- Kok Chen kchen@apple.COM Apple Computer, Inc.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!apple!kchen From: kchen@Apple.COM (Kok Chen) Newsgroups: comp.dsp Subject: Re: Hartley xform Message-ID: <35286@apple.Apple.COM> Date: 4 Oct 89 23:45:25 GMT References: <wZ_UwgC00UkM8KM0RN@andrew.cmu.edu> Organization: Apple Computer Inc., Cupertino, CA Lines: 20