Scott,

> > That's called a "convolution", and is the basis for much digital signal
> > processing.  This is exactly the algorithm that DSPs are optimized for.  In
> > a DSP you want to do each multiply-accumulate in one cycle, including the
> > address advancing and loop termination check.
>
> Well... technically it's correlation, but yeah you're right.

why you sai it`s correlation ???
I remember from math that correlation is an average of a sample with
another sample with delat,
For istance I remember that
corr(x,y,tau)=<x(t)*y(t+tau)> averaged in t.

The stuff the guy described should be a particular convolution where the
kernel funciton is a FIR (casual).

I might be wrong, after all it`s a matter of words.

Thanks,

Stefano

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