[Asterisk-Users] MOS Scores and LCR

[Florian Overkamp]

Hi,

trixter aka Bret McDanel wrote:
> MOS (Mean Opinion Score) is generally a bunch of people sitting there
> listening to audio and rating it 1-5 (there is a newer method that is
> "twice as good" becuase it goes 1-10, basically all values are double).
> Its their opinion.  This generally cant be dont automagically and still
> be MOS.  You can try to track frame drops and other things on your end
> to rate call quality and try to come up with something, but that
> technically isnt MOS.
> 
> AFAIK asterisk doesnt keep statistics of jitter, frame drops or anything
> else, that might be a good project for someone to take on, especially if
> you have multiple providers so you can rate quality in a more meaningful
> way.  The human ear really isnt the best tool for much of this.

There are ways to guesstimate MOS scores on a call by continuously 
getting some decent statistics from the jitterbuffer. We've had an 
intern do some work on this using IAXclient.

http://www.speakup.nl/en/opensource/jitterbuffer/

Florian