Configuring an external AEC reference channel
With the TeamConnect Ceiling devices, you can use an external AEC reference channel for echo cancellation (remote participants / far end signal) to temporarily stop the automatic dynamic beamforming while the far end signal is being played back through the loudspeakers in the room.
In this far end mode, the dynamic beam is aligned 90° downward. This function can be useful in certain situations where the AEC algorithm has difficulties with the dynamic reference signal.
The external AEC reference channel is sent by the DSP to the Dante input of the TeamConnect Ceiling device.
Requirements
- Route the AEC reference channel to the microphone input using Audinate’s “Dante Controller” software.
Best practice recommendation
Note:
From our experience, the following procedure should work for most scenarios.
- Leave the Dante input level of your microphone at the factory default value of 0 dB.
- Start from a minimum output gain of the DSP on the reference channel so the automatic dynamic beamforming can work normally.
- Check this by speaking in the room and observing the beam position in the LUI. The far end must be inactive during this time.
- While the far end remains inactive, then slowly increase the DSP output gain until the beam alignment of the microphone drops/switches to 90°.
- At this point, reduce the output gain of the reference channel on the DSP by 15 to 18 dB to provide some headroom for far end detection.
- Optionally, you can set the Dante input level on the microphone if this is more practical than adjusting the output level on the DSP.