ATEIS ECS User Manual
Page 38
ECS MANUAL
Version EN.1
38
AEC COMPONENT PARAMETERS
This component is used to avoid reflected signals caused by acoustic echo between microphones and
speakers, in remote conference applications.
The control window of the "AEC" module
is opened by a double click on the icon in the
DESIGN AREA and appears like this:
AEC Parameters
Parameter
Range
Comment
Echo Detect
led
This led lit when an echo is detected.
Signal
led
This led lit when an audio signal is detected.
ERLE (dB)
Echo Return Loss Enhancement.
The decrement of echo, it indicates the quality
of the AEC.
AEC Coefficient
Selector:
Perform,
Bypass, Hold
Function supplied for AEC controlled status. It
offers 4 functions:
•
Perform: turn on the AEC function
•
Bypass: turn off the AEC function
•
Hold: hold the parameters of the echo
coefficient
Reset
Button
Reset the echo cancellation on the channel
Far-End
Volume
Vu-meter
(dB)
Audio volume of the Far-end audio signal.
Near-End
Volume (dB)
Vu-meter
(dB)
Audio volume of the Near-end audio signal.
Near-End Level -90 to 20 (dB) volume adjustment of the near end audio signal
NLP
Selector:
Soft,
Medium,
Aggressive,
Off
NonLinear Process.
The purpose is to suppress the remain echo in
complex environment.
It offers four functions
：
•
off: NLP function off
•
soft
： weak intensity of remain
echo suppression.
•
medium
： medium intensity of
remain echo suppression.
•
aggressive
：aggressive intensity of
remain echo
suppression.
NLP Threshold
(dB)
-90 to 20 (dB)
The threshold value of the Nonlinear Process.
Noise
Reduction
Enable
Button
Enable the noise gate
NR Threshold
-90 to 20 (dB)
Threshold of the noise gate