Vingtor Stentofon ECPIR-3P, Technical Manual

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A100K11194
Turbine Station Configuration Guide
This feature must be used with caution as incorrect settings may severely degrade the
performance of the echo-cancelling algorithm.
Conversation Mode
For this parameter, there are five options:
- Full Open Duplex : Normal mode with echo cancellation
- Robust Duplex : Option used when open duplex fails due to excessive speaker loudness,
microphone overload or very high nonlinear distortions.
- Half Duplex Switching : Switches speech direction depending on who speaks the loudest
- Push-To-Talk : Half-duplex communication. Initially the microphone is shut off. Push the
M-button to open the microphone, and release to listen. (Only applicable to stations with
M-key)
- Open : Full Open Duplex without echo cancellation
Audio Profile
- Normal: Standard Acoustic Echo Cancelling (AEC) Profile with a few extra filters added to try
to minimize the effects on the voice-signal when operating in a standard environment.
- Noisy Environment: Environment with high noise levels but maximum speaker level is not
required.
- Very Noisy Environment: Extreme environment with very high noise level and maximum
speaker level is required.
Hardware DRC
Enables Dynamic Range Compression
Hardware AGC
Enables
Automatic Gain Control
. Options are
Disabled
,
Quit Area
,
Noisy Area
,
Manual Control
.
- When selecting Manual Control, there will be more advanced AGC parameters available.
Automatic Gain Control (AGC)
If speech level and environmental noise is very unstable, it may be turned on.
- AGC Speed : 0..3 selects different attack/release times. Lesser values mean faster attack and
slower release time.
- AGC Volume : 0..7 corresponds to -20..0 dBm
Audio Out Source
Main audio out (speaker) sources:
- Voice Audio : Plays audio from VoIP signal
- LineIn Idle : Plays audio from the Line IN input when the station is in idle. During a call, plays
audio from the VoIP signal.
- LineIn Idle + GPI0-6 : If input 6 is activated while the station is in idle, plays audio from the
Line IN input. Otherwise, plays audio from the VoIP signal.
Audio Input Source (Turbine Extended only)
-
Normal Microphone
(default): Select this option when using an electetret microphone as
audio source. On the TKIE kit, the microphone is connected to connector P6, pins 3 & 4.
-
Line In
: Select this option when using an external audio source with line level. On the TKIE kit,
the line Input is on connector J8, pins 8 & 9.
Line Out Source
Line Out can play audio either from VoIP signal or directly from microphone.
-
Audio Ch2
: Plays audio from VoIP signal.
-
Microphone before AEC
: The analog and digital (only 4.7 software) microphone signal is sent
to Line Out. The loudspeaker signal is picked up by the microphone through the air, and also
sent to the Line Out. There is no signal processing done.
-
Microphone after AEC
:
If the station is in Open Mode: The microphone signal is sent to Line Out. The speaker signal
is picked up by the microphone through the air, and also sent to the Line Out. Echo Canceling
won’t work, but Noise Reduction works. Audio from mic should be heard all the time on Line
Out, while audio from other party should be heard only when PTT is pressed by said party.
If the station is in Full Duplex Mode: The microphone signal is sent to Line Out.