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Re: [Linphone-developers] Echo Canceler

From: Simon Morlat
Subject: Re: [Linphone-developers] Echo Canceler
Date: Mon, 7 Feb 2005 11:28:35 +0100
User-agent: KMail/1.7.1


I did not forget your echo canceler patch, however it is still not merged, 
lack of time to make the changes in mediastreamer to make the stream 
architecture more robust.
Thanks a lot for the update, I've downloaded the code.


Le Jeudi 3 Février 2005 16:31, Charles Eidsness a écrit :
> Hi All,
> Months ago I posted a patch to add an echo canceler to linphone version
> 0.12.2. After some more testing I discovered that my original patch
> wasn't very robust. Since no one had shown any interest in it I had
> simply pulled it off the web. In the meantime I've been able to sort out
> a lot of my issues and have gotten it to work a little better. You can
> find a patch that adds an echo-canceler module to linphone here:
> and you'll need my echo canceler library which you can find here:
> A few words of warning. This code should be considered a "alpha"
> release. This is not a drop in module. You will probably have to figure
> out how the echo canceler works and make changes to the code.
> My echo canceler library uses fixed point only, if you have an FPU I
> strongly recommend you use the floating point echo canceler you can find
> the reference directory of my library. You'll get way better
> performance. It's written in C++ and you'll probably want to convert it
> to C.
> My patch to linphone is a complete hack job. If you look at the code I'm
> sure it will jump out at you. My changes to linphone work but they
> aren't very elegant, getting a multi-input / multi-output module to work
> in the mediatstreamer took more effort than I had originally thought.
> I think that's about it. If you do manage to get it to work or make
> changes to it I'd appreciate you letting me know.
> Hope someone finds that useful :)
> Charles
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