[Ekiga-list] echo suppression when using speakers

[Konrad Karl <kk_konrad gmx at>]

Hi,

recently I have been forced to use skype and discovered that they
have a quite well working echo suppressor. (my vis-a-vis used no
headset, only normal speakers and the microphone from the Logitech 
QuickCam pro 9000)

I think the algorithm skype uses is quite simple: whenever sound
is coming from the other party and being output they just mute the
mike. Sometimes there are audible artifacts but it much better than
nothing. While I did not know about the pc speakers I was thinking
she/he used a head set until being told thats a simple speaker.

This means that its not easy to interrupt the vis-a-vis 
while she/he is speaking w/o pauses, skype seems to use a rather
short time constant for muting the mike.

Perhaps there could be some audio threshold above which the
microphone could be enabled unconditionally so some loud
speak will make it to the other party.

I did not try with both parties using speakers so far, perhaps this
is asking for trouble...

Comments welcome.

Greetings,
Konrad