ATEIS ECS - Manual (Page 34)

ECS MANUAL
Version EN.1
34
AEC WITH FULL EXAMPLE (2 mics, 2 lines, local amplification)
In this example we include 2 microphones and 2 audio sources (Radio and CD) in a system with codec
server.
Microphones:
Every microphone has to use the AEC before to be sent to the mixer 1 for the transmission. One
microphone needs one AEC channels.
The reference of these AEC channels is the Far-End signal after the AEC treatment.
If there is a local amplification, each microphone has to use a local echo suppressor before to be
sent to the mixer 2 for the local amplification.
Audio line:
The audio sources which are not microphones don't need use AEC.
They are directly sent to the mixer1 and 2, for the transmission and the local amplification.
Far-End signal:
If the transmission system use a codec server, then the Far-End signal has to use one AEC
channel.
The reference of this AEC channels is the mixed signal of all the local audio sources (output of
mixer 1).
Schematic:
As the AEC component contains four channels, all these three AEC modules (for mic 1, mic 2 and
far-end signal) are in one AEC component.