Speakerphones And Aec (Acoustic Echo Cancellation); Standalone Mode; External Dsp With Aec Mode - Extron electronics MediaPort 200 User Manual

Speakerphones and AEC (Acoustic Echo Cancellation)

When a microphone or microphone mix are connected to the MediaPort and the MediaPort
is connected to a sound system to amplify audio from the far end of the conference, the
MediaPort is functioning in the same way as a speakerphone. In a conference call, when
the far end talker is amplified in the local room, that signal has the potential of being picked
up by the local microphones and sent back to the far end. That audio is delayed and then
heard by the far end talker as an echo of their voice.
This echo is often referred to as "acoustic echo" because it travels through the acoustic
space from the sound system to the microphones. A specific type of processing, called
"acoustic echo cancellation", or AEC, is used to cancel the echo signal and prevent it from
being sent back to the far end.

Standalone Mode

In the Standalone audio mode, the computer recognizes the MediaPort as a Speakerphone.
In this mode,
in a soft conferencing application such as Skype for Business and in Windows. When a
speakerphone is the selected audio device, the host conferencing application will then use
its built-in AEC to cancel the acoustic echo.

External DSP with AEC Mode

In the External DSP with AEC audio mode, the computer recognizes the MediaPort as
an Echo Cancelling Speakerphone. In this mode,
MediaPort 200
such as Skype for Business and in Windows. When an echo cancelling speakerphone is
the selected audio device, the soft conferencing application's AEC should be turned off
automatically. In this case, an external DSP would be connected to the MediaPort Mic/Line
Input with the AEC applied in the external DSP processor.
Speakerphone – MediaPort 200
would be chosen as the audio device in a soft conferencing application
would be chosen as the audio device
Echo Cancelling Speakerphone –
MediaPort 200 • Theory of Operation 8