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What is the comfort noise level in VISM

In my VISM config

INMUMMGX01.1.3.VISM8.a dsplndsp 1

VismLineNum: 1

ECANEnable: enable

MaximumTail: 64 milliseconds

ResidualEcho: SuppressResidual

VoiceDetection: Enable

Can we say that we haven't configured comfort nosie ?

What exactly "suppressresidual" means?

Can someone tell me that what is the default comfort noise level for VISM.

Regards..

1 REPLY
Bronze

Re: What is the comfort noise level in VISM

Comfort noise is a addition signal generated by the voice equipments, which is utilized to reduce bandwidth consumption when there is a silence below a level nothing is send across, but this may make a feeling for the listener as if the line is disconnected, b'coz we are used to phones which has some noise , so an artifical noise is injected to avoid this .

Residual Echo Control (REC) instructs the canceller how to treat echo remaining after cancellation. When set to cancelOnly, REC is disabled. When set to suppressResidual, the residual echo is replaced with silence. When comfortNoise is chosen, noise is injected in place of residual echo at the same level as the ambient noise at the near end.

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