Silenceit Additions; Detailed Description - Polycom MGC-25 Release Notes

SilenceIT Additions

A new mechanism is introduced, enabling fine tuning of the SilenceIT algorithm.

Detailed Description

In previous versions, in some cases, the SilenceIT algorithm was not sensitive enough to
the noise level causing speech to be muted, or not muting music and noise.
In version 9.0, the new mechanism enables the system to measure the audio energy, and
based on this measurement, fine-tune the system usage of the SilenceIT algorithm. To
reliably measure the audio energy and apply the new mechanism, speech and noise/music
must have sufficient energy, and be consistent across all audio ports.
The audio energy measurements are done by connecting an endpoint to an ongoing
conference, and using the IP Terminal to detect the noise/speech level. The values
measured are then compared to the values listed in Table 6 on page 1-28. Based on the
range of these values the user locates the corresponding parameter which is used to
configure a system.cfg flag.
To enable the SilenceIT algorithm and fine-tune its operation:
1.
2.
3.
4.
5.
6.
7.
Create an ongoing conference and connect an endpoint using a noisy line.
In the Cards section, locate the audio card used to handle the participant connection to
the conference and write down the slot and unit numbers.
Using the participant's endpoint place the call on-hold.
When the participant places the call on-hold music is heard.
Right-click the MCU icon, and then click IP Terminal.
The Donkey-COM window opens.
In the cmd> field enter the following command: Level -g <slot #> and then press
<Enter>.
In the command line enter: AM<slot#><unit #>CALCSTRMSTAT and press
<Enter>.
The message "Started gathering signal statistics" appears, indicating that the data
gathering process has started.
Wait 15 seconds for the data gathering process to complete.
Version 9.0 Detailed Description - General
27