[Patents] Fwd: Patent problem

[rubini@gnu.org (Alessandro Rubini)]

I received this, I though it's of interest here.

> From: Juhana Sadeharju <kouhia@nic.funet.fi>
> Subject: Patent problem
> Date:         Mon, 26 Mar 2001 14:23:24 +0300
> 
> Hello. We have a problem.
> 
> A free software author has implemented a fast (using FFT) but low delay
> (using trickery) convolution algorithm. The algorithm is meant for real-time
> audio processing. There are papers from 1988 and 1990 on the algorithm.
> 
> Lake DSP has patented low delay convolution in 1992-1993. They also
> cover the prior art found from the above papers, and have now threatened
> the free software author with a lawsuit.
> 
> Would you have a possibility to find people who are interested in
> to read the prior art papers and the patents, and give comments?
> The story is at "http://www.funet.fi/~kouhia/convolver.html";.
> 
> I don't see any other way than to put the software available
> because the Lake DSP is very hostile.
> 
> Best regards,
> 
> Juhana

/alessandro