C-Series Acoustic Echo Canceller References - Polycom SoundStructure C16 Design Manual

C-Series Acoustic Echo Canceller References

As shown in the following figure, each submix signal from the matrix can be
processed with dynamics processing, parametric equalization, a fader, and up
to 1000 milliseconds of delay. Each SoundStructure device has as many sub-
mixes as there are inputs.
1
2
N
Submix Processing
Submix Input
Dynamics
from Matrix
Processing
In conferencing applications, an acoustic echo canceller removes the remote
site's audio that is played in the local room from being picked up by the local
microphones and sent back to the remote participants. The AEC
following figure removes the acoustic echo of the remote talker so it is not sent
back to the remote talker.
AEC reference for local room
Local Room
Acoustic echo cancellation processing is only required on the inputs that have
microphone audio connected that will "hear" both the local talkers' speech
and the acoustic echo of the remote talkers' speech.
Telco
Telco
Telco
Processing
Telco
Processing
Processing
Processing
Input
Processing
Input
Processing
Matrix
Input
Processing
SubMix
Submix
Processing
Processsing
Parametric
Fader
Equalization
AEC reference for remote room
SoundStructure Product Family
Output
1
Processing
Output
2
Processing
Output
N
Processing
Mute
Submix output
Delay
to Matrix
Local Room
Remote Room
in the
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