CNG is a voice quality enhancement (VQE) feature provided by the UMG8900. V oice activity detection (V AD) aims to identify and eliminate the long silence from voice signals to save voice channels without compromising the service quality . In the muteperiods, the CNG technology is used to generate comfortablenoise so that the users willnot feel
unnatural in conversation or regard call interruption by mistake. Therefore, a comfort noise generator mustbe configured at the receiving end. The receiver adopts a mechanism to regenerate the main features of thebackground noise. In this way , the smooth assembling of voice segments and silence segments is ensured when the voice is restored.

 

Benifit or carriers:

In cooperation  with V AD, CNG can guarantee that the  voice quality is not af fected in the case of  the  bandwidth  of  IP  voice  streams  reduced  by  a  large  margin,  thus  enhancing  the  call experience of users. This  can  also  guarantee  that  users  do  not  hang  up  upon  the  misjudgment  that  the  voice channels  are  interrupted  when  they  hear  nothing  because  the  IP  bearer  network  breaks  down temporarily .

 

Is there any version dependency?

What is the main benefit of this?

Is there any dependency to gain CNG?

What is VAD?

From which board, we can get VAD?

From which board, we can get CNG?

Is there any version dependency?

zsiddique Posted on 2014-05-31 11:30

No

What is the main benefit of this?

prone Posted on 2014-05-31 15:01

Reduce the BW in huge margin

Is there any dependency to gain CNG?

prone Posted on 2014-05-31 15:02

No dependency, but the feature needs to enable in MSC