[Asterisk-Dev] Echo cancellation on GPU

[John Todd]

At 8:09 PM +0200 on 9/25/05, steve at daviesfam.org wrote:
>Hi,
>
>I've been thinking off and on about echo cancellation and the use of a GPU
>board to run it.
>
>The idea is to use "inexpensive" commodity graphics card in the box, and
>offload the "dsp"-style work to the GPU.
>
>I just now came across this new research paper in which an FIR filter is
>implemented on a GPU:  http://www.ecsl.cs.sunysb.edu/fir/fir.ps
>
>FIR filter is at the core of most echo cancellation algorithms - so this
>looks like a head-start on such a project.
>
>Dunno if you have comments, Steve Underwood?
>
>Regards,
>Steve


Just as a reference, there was some mumbling about this earlier in 
the year, but no conclusive comments either way:

http://lists.digium.com/pipermail/asterisk-dev/2005-January/thread.html#8863

I don't have a link offhand, but I remember someone being very 
dismissive of the idea with a set of reasonable arguments.  However, 
I also know that ignoring people who tell you things are impossible 
is one of the best things a programmer can do...

Additionally:
http://www.ecsl.cs.sunysb.edu/fir/  (general project)
http://lists.digium.com/pipermail/asterisk-users/2004-June/049298.html
http://gpgpu.org/forums/viewtopic.php?p=3583&sid=8509723b6c1ba42424fd68149c71b0b6
   http://www.bionicfx.com/info.html
   http://www.pjwstk.edu.pl/~s1525/index.html#msc


JT