R49G Guard Phone Administrator Guide
AKUVOX SMART INTERCOM
www.akuvox.com
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10.3.VAD configuration
VAD
（
Voice Activity Detection) is a function used for the detection of the
existence of the audio signal during the call. When VAD detects a certain
interval of silence during the call, then it will replace the bigger audio packets
with the smaller packet of CNG packets, thus creating the CNG that you will
hear while reducing the data transmission cost and bandwidth consumption.
To enable VAD, you can press
and go to
Audio Settings
, then enable the
VAD.
Parameter Set-up:
VAD(Voice Activity Detection)
: Allow IP phone to detect the presence or
absence of human speech during a call. When detecting period of
“silence”, VAD replaces that silence efficiently with special packets that
indicate silence is occurring. It can facilitate speech processing, and
deactivate some processes during non-speech section of an audio
session. It can avoid unnecessary coding or transmission of silence
packets in VoIP applications, saving on computation and network
bandwidth.
