[PD] OT: faster than Fourier transform

[Mathieu Bouchard]

Le 2012-01-25 à 16:16:00, Charles Henry a écrit :

> I've wondered about that too-from a perceptual point of view.  There's 
> not much differentiation among noise signals.  They all mostly sound the 
> same

Well, the brain still has to extract enough info from them to have a 
general idea of what kind of noise it is (a rough shape of spectrum), and 
ESPECIALLY extract the non-noise portions of the spectrum.

> Even though there's a very large number of dimensions for variation, 
> they must have a sparse representation somewhere (in the brains... 
> brains...)
>
> but the FFT?  no way...

Well, there are perceptual models that try to separate «noise» from 
«non-noise» for easier encoding and stuff...

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