> -----Original Message----- > [mailto:[EMAIL PROTECTED] On Behalf Of Guy Harris > > daniel zhang wrote: > > > 1. MOS > > Voice quality was traditionally reported as a Mean Opinion > Score (MOS) > > on a scale from 1-5 where 1 is the lowest and 5 the highest. > > I am not an expert on this but I think probably we could > add the MOS > > into Ethereal. > > At least according to the Wikipedia article on the Mean Opinion Score: > > http://en.wikipedia.org/wiki/Mean_Opinion_Score > > the score comes from people listening to particular phrases > and giving their 1-to-5 rating of the quality of the sound, > not from a calculation you could perform on a raw digital > signal. > [...]
That's true, but there have been many attempts to model MOS from raw data directly. The most prominent being the ITU G.107 "E-Model". But still, the model includes parameters like the audio characteristics of the end devices, jitter buffer implementations and so on, so MOS cannot be calculated from a network trace without making specific assumptions on the end devices and audio path. Best regards, Lars Ruoff _______________________________________________ Wireshark-dev mailing list [email protected] http://www.wireshark.org/mailman/listinfo/wireshark-dev
