Re: [GnomeMeeting-list] Re: Re: PC-to-PC calls using Quicknet hardware?

[Malcolm Caldwell <malcolm caldwell ntu edu au>]

On Fri, 2004-08-20 at 14:25 +0200, Damien Sandras wrote:
> Le vendredi 20 ao�04 �3:20 +0100, Mark Hellman a �it :
> > Damien Sandras wrote:
> > 
> > > They have very good hardware chipsets. I believe that quicknet hardware
> > > should cancel echo when using Webcam + loudspeakers, but I have never
> > > tried myself, I far prefer using a headset or a normal phone with my
> > > quicknet card.
> > 
> > Headphones are not very suitable when there is more than one person on one
> > side. For instance, to establish a videoconference between two groups of
> > people the ability to use loudspeakers is vital. So far, I have only seen
> > expensive H323 hardware appliances (Aethra, Polycom, etc.) doing a decent
> > job in this scenario. I don't know if there is something special about the
> > hardware or about software running inside those appliances, but I still
> > haven't found software (for Windows or Linux) that matches their
> > performance even close. That's why I was hoping that some owner of a
> > Quicknet card shared his experience on the subject of echo cancellation.
> > 
> > 
> 
> 
> What you need is a special micro/speaker system with echo cancellation.
> That exists in various shops.
> 
> That's the only way I think.

Perhaps not the only way...  Outside of gnomemeeting it may be possible.

There has been some echo cancellation code posted to the openh323 list
(the latest version is the last few days)  which is reported to work
with simpleh323.  In theory it *could* be ported to work with
gnomemeeting.

Additionally, I have heard that Windows XP has echo cancellation built
in - I don't know much about it because I don't run XP!

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