Re: samples and blocks again

From: Eric Scheirer (eds@media.mit.edu)
Date: Thu Apr 23 1998 - 18:17:39 EDT

Juhana K Kouhia wrote:

> A FIR filter could be made with
> y = x(-1)*a + x(0)*b + x(1)*c;
> but I don't know if that is already possible. I'm not able to verify
> it from SAOL specs now.

Perhaps I don't understand what you are suggesting. It seems
like you suggest that this syntax could allow the implementation
of pre-causal filters! Surely, we can't implement the above
FIR filter except by adding a constant delay throughout, in
which case the implementation is just the regular FIR instruction

  y = FIR(x,a,b,c);

Can you explain again this idea?

Thanks and best regards,

 -- Eric 

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