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[Linphone-users] Re: [Linphone-developers] Re: Mesuring speech quality w
[Linphone-users] Re: [Linphone-developers] Re: Mesuring speech quality with linphone
Thu, 22 Sep 2005 14:06:45 -0400
2005/9/14, Clement Chen <address@hidden>:
> Hi, Eduardo,
> I had some tests and here are my comments FYI:
> - From the view of testing, I suggest to add commands like "qos_mon start",
> "qos_stop stop", or so to let the qos logging more flexible to measure only
> part of a conversation instead of the whole conversation. The reason is that
> sometimes, a phone may reach AutoAttendent or IVR first, and then enter the
> main conversation...
Yes, I agree with you. Could be very interesting logging only some parts
of the call. But you should be careful with this pieces of the call.
if you have a call with 4 minutes of duration and you log only the second
and the last minute, you cannot join the two logs to have just one MOS
You can have one MOS pontuation for each log.
> - If the other party enabled VAD (let's say in a linphone-to-hard_phone
> case), the measured score would get worse. I know that results from this
> model which considers majorly packet loss and packet delay. Is there any way
> to deal with such scenarios to exclude the VAD periods?
The model implemented on the tools that I suggested you also considers the
codec behaviour. If the codec has VAD, the model will decrease the R factor
based on some tabled values (ITU-T G.113).
> I will try to do a patch for #1.
> On 9/8/05, Eduardo Bezerra <address@hidden> wrote:
> > Suggestions are welcomed.
> > 2005/9/8, Eduardo Bezerra <address@hidden >:
> > > Hi all,
> > >
> > >
> > > Regeane Aguiar (address@hidden), Alexandre Passito
> > > and I developed a patch to linphone 1.0.1 to measure speech quality
> > > the tool available in
> > > The patch-qosfile-050721 file makes modifications on oRTP to
> > > generate the trace
> > > file and the patch-linphonec-qosfile-050721 modifies linphonec to
> > > accept aditional
> > > options about the speech measurement.
> > >
> > > --
> > > Eduardo Bezerra Valentin
> > > Bacharelado em Ciência da Computação - DCC - UFAM
> > > Laboratório de VoIP - GRSD - UFAM
> > >
> > >
> > >
> > --
> > Eduardo Bezerra Valentin
> > Bacharelado em Ciência da Computação - DCC - UFAM
> > Laboratório de VoIP - GRSD - UFAM
> > _______________________________________________
> > Linphone-developers mailing list
> > address@hidden
Eduardo Bezerra Valentin
Bacharelado em Ciência da Computação - DCC - UFAM
Laboratório de VoIP - GRSD - UFAM
[Linphone-users] Re: [Linphone-developers] Mesuring speech quality with linphone, Simon Morlat, 2005/09/14