Gain Control (AGC), Voice Activity Detection (VAD), Comfort Noise Generation (CNG) and jitter
buffer.
Topics
Acoustic Echo Cancellation (AEC)
Noise Suppression
Background Noise Suppression (BNS)
Automatic Gain Control (AGC)
Voice Activity Detection (VAD)
Comfort Noise Generation (CNG)
Jitter Buffer
Halo series phones employ advanced AEC for hands-free operation. The AEC feature can remove
the echo of the local loudspeaker from the local microphone without removing the near-end
speech.
The impact noise in the room is picked-up, including paper rustling, coffee mugs, coughing, typing,
and silverware striking plates. These noises, when transmitted to remote participants, can be very
distracting. It is default applicable to Halo series phones.
Background noise suppression (BNS) is designed primarily for hands-free operation and reduces
background noise to enhance communication in noisy environments.
Automatic Gain Control (AGC) is applicable to the hands-free operation and is used to keep audio
output at nearly a constant level by adjusting the gain of signals in some circumstances. This
increases the effective user-phone radius and helps with the intelligibility of soft-talkers.
VAD can avoid unnecessary coding or transmission of silence packets in VoIP applications, saving
on computation and network bandwidth.
Topic
VAD Configuration
The following table lists the parameter you can use to configure VAD.
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