From: "James Turner" <james_turner_81@hotmail.co.uk>
Path: news.mathworks.com!newsfeed-00.mathworks.com!webcrossing
Newsgroups: comp.soft-sys.matlab
Subject: Re: Dummies guide to DCT
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Date: Thu, 16 Nov 2006 18:35:30 -0500
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sturlamolden wrote:
>
>
>
> James Turner wrote:
>
>> I was wondering if someone could explain to me the Discrete
> Cosine
>> Transform, in as simple as possible English.
>
> In the DCT the signal is decomposed into a sum of cosines, as
> opposed
> to the Discrete Fourier transform (DFT) where the signal is
> decomposed
> into a sum of sines and cosines.
>
>
  

Thanks for the respone guys, but I think I need even more reading. I
am lost at "the signal is decomposed into a sum of cosines". I don't
understand what a sum of cosines is! Is there not a way of explaining
DCT assuming that a person ONLY understands what a digital image is
(i.e. a collection of pixels described using bits)? I'm talking
simple so a kid could understand it kind of stuff!