Freeswitch parameter "energy-level" when using WebRTC?

[insightc...@t-online.de]

I'm trying to solve a problem I had on our first 0.9-beta test conference: We had too much background noise when using WebRTC (e.g. hearing people typing on keyboard even when they were using a headset) so I wanted to fix this using the energy-level parameter in

/opt/freeswitch/conf/autoload_configs/conference.conf.xml

and set it to a higher value. I assumed that WebRTC uses <profile name="cdquality"> but I also tried with all other profiles and even when I raised the level from 100 to 1000 this did not change anything.

What would be the right place to try to resolve this?

Are there other parameters to make adjustments to the auto gain so that it is not maxing out completely when people are actually silent?

Thanks for any hints
Oliver

[Richard Alam]

On Sat, Sep 6, 2014 at 3:16 PM, <insightc...@t-online.de> wrote:

I'm trying to solve a problem I had on our first 0.9-beta test conference: We had too much background noise when using WebRTC (e.g. hearing people typing on keyboard even when they were using a headset) so I wanted to fix this using the energy-level parameter in

/opt/freeswitch/conf/autoload_configs/conference.conf.xml

and set it to a higher value. I assumed that WebRTC uses <profile name="cdquality"> but I also tried with all other profiles and even when I raised the level from 100 to 1000 this did not change anything.

What would be the right place to try to resolve this?

Did you try restarting FreeSWITCH? Or "reload xml" but not sure if it'll reload conference.xml.

 

Are there other parameters to make adjustments to the auto gain so that it is not maxing out completely when people are actually silent?

Thanks for any hints
Oliver

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[insightc...@t-online.de]

Yes I actually restarted BBB entirely to be sure but could not find any effect, even the smallest background noise will trigger the microphone to broadcast it and the only thing that helped was having everybody on mute all the time

Best regards
Oliver

[Calvin Walton]

On Sat, 2014-09-06 at 12:16 -0700, insightc...@t-online.de wrote:
> I'm trying to solve a problem I had on our first 0.9-beta test
> conference:
> We had too much background noise when using WebRTC (e.g. hearing
> people
> typing on keyboard even when they were using a headset) so I wanted
> to fix
> this using the energy-level parameter in
>
> /opt/freeswitch/conf/autoload_configs/conference.conf.xml
>
> and set it to a higher value. I assumed that WebRTC uses <profile
> name="cdquality"> but I also tried with all other profiles and even
> when I
> raised the level from 100 to 1000 this did not change anything.
>
> What would be the right place to try to resolve this?

I believe this is actually more of a web browser bug than something
that can be fixed in FreeSWITCH, unfortunately.

All of the web browsers with WebRTC support are doing automatic gain
control, and if nobody is talking into the microphone for a while, the
browser will increase the gain such that the background noise is loud
enough to go over FreeSWITCH's energy level threshold.

It would be a good idea to see if Chrome or Firefox have this issue in
their respective bug trackers.

--
Calvin Walton <calvin...@kepstin.ca>
BigBlueButton developer

[HostBBB.com]

Oliver,

 I haven't looked too close at this,  but you may be able to edit the webrtc javascript to disable AGC altogether, and still get echo cancellation.

http://www.webrtc.org/reference/webrtc-internals/voeaudioprocessing#TOC-SetAgcStatus 

this shows you some specifics on attempting.   Not sure if is the sip.js stack or the bbb-webrtc.js that would need to be modified.

Let us know if you try this and how it works.

Regards,

Stephen

hostbbb.net