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

[daniel huhardeaux <devel tootai net>]

Mark Hellman a écrit :

> daniel huhardeaux wrote:
>
> > It change nothing: echo cancellation is to limit echo from hardware 
> > but you will always have the sound going out from loudspeakers and 
> > coming back to your microphon. This echo (reverberation) will never 
> > be cancelled by the echo cancellation feature as it is part of user 
> > audio (as would be the music from your radio if you don't switch it 
> > off  when your in conversation ;-))
>
>
> But how come we hear no echo when using H323 appliances like the ones 
> made by Aethra or Polycom?  How do they do it? And how can we achieve 
> similar performance without spending hundreds of dollars?

Sound is coming to your hear (like headset), not in the room.  This 
noise is not coming back to microphon (like POTS)

--
Daniel