Re: long FIR filters
Re: long FIR filters
- Subject: Re: long FIR filters
- From: Chris Liscio <email@hidden>
- Date: Fri, 2 Feb 2007 07:44:57 -0500
Cor,
I've thought about this before (FuzzMeasure can measure and produce
the impulse responses that can be used in convolutions like this),
and came across an article and technique that might help you out.
Check out "Efficient Convolution without Input-Output Delay" which is
available from the online AES e-library -- http://www.aes.org/e-lib/
browse.cfm?elib=7957. That article discusses a very clever technique
for accomplishing this, and will probably lead you to find other
sources as well.
I'd suggest joining the AES if you're planning on doing more research
like this, since buying articles can add up quickly. It's like the
iTunes Music Store for research articles!! :)
Cheers,
Christopher Liscio
http://www.SuperMegaUltraGroovy.com
http://www.FuzzMeasure.com -- Award Winning Acoustic Measurement
Software for Mac OS X
On 2-Feb-07, at 3:47 AM, Cor Jansen wrote:
Hello all,
I would like to implement a very long FIR filter for a room
correction application (about 10.000 taps).
I know the PowerPC chips has the Altivec module to do this kind of
tasks efficiently.
But I have an Intel Mac.
How can I write this FIR filter such that it is most efficiently
handled on a Intel mac and
preferable also efficient on a PowerPC mac?
Does anyone has any experience with this? And how many taps can be
done in real time?
Thanks,
Cor.
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