ATEIS ECS User Manual
Page 24
ECS MANUAL
Version EN.1
24
Audio lines:
If there are audio lines (like CD/DVD/Radio, etc) in more than the microphones, they don't need
to pass through an AEC.
They are directly sent to the transmission and the local amplification through mixer if necessary.
Far-End signal:
If the transmission system use a codec server, then the Far-End signal must be treated on one
AEC channel.
The reference of this AEC channels is the mixed signal of all the local audio sources (output of the
local mixer).
After proper adjustment of the level (in the input component, and in the mixer) the volume
control of the Far-End signal has to be done with the Near-End Volume parameter of the AEC
component.
Local amplification:
If there is a local amplification, then each microphone has to pass through a local echo
suppressor before to be sent to the local amplification.