Re: [Ekiga-list] echo canceller

[Damien Sandras <dsandras seconix com>]

Le dimanche 11 janvier 2009 à 17:39 +0100, Konrad Karl a écrit :
> On Sat, Jan 10, 2009 at 10:02:16PM +0100, Damien Sandras wrote:
> > Le samedi 10 janvier 2009 ?? 13:05 +0100, Judith Meili a ??crit :
> > > I have no echo problems with skype but with Ekiga there is a big echo 
> > > and the receivers of my calls complain. Is there no way to get rid of 
> > > this echo?
> > > 
> > 
> > Use Skype or buy a headset.
> 
> There may be better solutions... 
> 
> Below is a copy of a post I sent to this list about half a year ago
> (unfortunately I received zero comments :-( )
> 
> The skype "echo suppression" seems to work surprisingly well in
> practice. My brother-in-law is making frequently calls using
> skype and told me that both parties just use no headset, just
> the webcam mike and normal speakers and there is almost no
> echo noticeable.
> 
> still interested in comments, have very little time for research
> now unfortunately but this may improve.
> 
> Greetings,
> Konrad
> 
> <email> Hi,
> <email> 
> <email> recently I have been forced to use skype and discovered that they
> <email> have a quite well working echo suppressor. (my vis-a-vis used no
> <email> headset, only normal speakers and the microphone from the Logitech
> <email> QuickCam pro 9000)
> <email> 
> <email> I think the algorithm skype uses is quite simple: whenever sound
> <email> is coming from the other party and being output they just mute the
> <email> mike. Sometimes there are audible artifacts but it much better than
> <email> nothing. While I did not know about the pc speakers I was thinking
> <email> she/he used a head set until being told thats a simple speaker.
> <email> 
> <email> This means that its not easy to interrupt the vis-a-vis
> <email> while she/he is speaking w/o pauses, skype seems to use a rather
> <email> short time constant for muting the mike.
> <email> 
> <email> Perhaps there could be some audio threshold above which the
> <email> microphone could be enabled unconditionally so some loud
> <email> speak will make it to the other party.
> <email> 
> <email> I did not try with both parties using speakers so far, perhaps this
> <email> is asking for trouble...
> <email> 
> <email> Comments welcome.
> 

Wouldn't you get the same result if you enable silence suppression in
Ekiga ?
-- 
 _     Damien Sandras
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