[Asterisk-Users] Meetme echo cancellation

[SteveK]

On Feb 9, 2006, at 11:19 AM, Kevin P. Fleming wrote:

> Steven Langley wrote:
>
>> I am using IAX2 softphones dialing into a meetme conference. In my  
>> softphone
>> I was forcing uses to click on a button when they wanted to speak,  
>> enabling
>> their microphone and disabling their speakers. This way when a  
>> user was
>> speaking they did not hear their voice half a second later  
>> (because meetme
>> mixes the voice and sends to everyone in the conference).
>
> This is wrong. app_meetme does not send the speaker's own voice  
> back to
> them, because the mixing in Zaptel removes it for the speaker's  
> channel
> in the conference.

This is correct, but the other participant's softphones will get the  
speaker's voice, and if they are in the conference, they will echo  
the speaker's voice back to the conference.

The solution is echo cancellation in each participant's call.  In the  
case of softphones, the softphones themselves would be the place to  
do echo cancellation.

-SteveK