Akuvox SP-R55P/G
Web interface
88
Sections
Description
Echo Canceller
Echo Canceller: To remove acoustic echo from a voice
communication in order to improve the voice quality .
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.
CNG(Comfort Noise Generation): Allow IP phone to
generate comfortable
background
noise
for
voice
communications
during
periods
of
silence
in
a
conversation. It is a part of the silence suppression or VAD
handling for VoIP technology. CNG, in conjunction with
VAD algorithms, quickly responds when periods of silence
occur and inserts artificial noise until voice activity
resumes. The insertion of artificial noise gives the illusion
of a constant transmission stream, so that background
sound is consistent throughout the call and the listener
does not think the line has released.
Jitter Buffer
Jitter buffer is a shared data area where voice packets can be
collected, stored, and sent to the voice processor in even
intervals. Jitter is a term indicating variations in packet arrival
