Hello,
I am a scientist at the Fraunhofer Heinrich Hertz Institute
in Berlin. We use Linphone to control drones via the voice channel of mobile network. This has the advantage that voice data is prioritized in the mobile
network and thus a short latency is guaranteed.
https://www.hhi.fraunhofer.de/en/press-media/news/2018/call-a-drone-controlling-drones-via-voice-channels.html
To communicate with the drones, we use Linphone on the
ground station side. But now we have the problem that not all voice comfort
functions can be switched off. We already have some settings in the Linphonerc
file:
[sound]
ec_filter=MSWebRTCAEC
playback_dev_id=WASAPI: Lautsprecher (VB-Audio Virtual Cable)
capture_dev_id=WASAPI: CABLE-A Output (VB-Audio Cable A)
ringer_dev_id=WASAPI: VoiceMeeter Input (VB-Audio VoiceMeeter
VAIO)
echocancellation=0
echolimiter=0
agc=0
remote_ring=C:\Program Files
(x86)\Linphone\share/sounds/linphone/ringback.wav
playback_gain_db=0.000000
mic_gain_db=0.000000
Using only this Codec:
[audio_codec_4]
mime=PCMA
rate=8000
channels=1
enabled=1
We really only want to send and receive the data 1:1 as we
generate it on the PC. However, it seems that the reception and the
transmission signal influence each other in some way at the moment.
Can you tell me how to disable the corresponding functions
in Linphone?
Kind regards
Tom Piechotta