<div dir="ltr">Thank you Martin,<br><br>So the MOS-LQE does not inform bout payload itself but predicts the MOS based on networks metrics and P862 and P863 uses also payload (voice) to calculate the MOS. Is it true what I have understood.<br>
<br>Best regards.<br><br><div class="gmail_quote">On Sat, May 8, 2010 at 1:17 PM, Martin Vit <span dir="ltr"><<a href="mailto:vit@lam.cz">vit@lam.cz</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello,<br>
<br>
I've choosen only MOS-LQE because it is calculated only on network<br>
parameters, which is loss, burstinnes and delay (which is converted to<br>
loss by jitterbuffer simulator). It does not takes into account voice<br>
(payload). There is no effective objective methods (today) which<br>
predicts MOS. Only ITU-T P.862 and P.563 which is patented and it can<br>
analyze only 20 seconds samples. I've tried implementing P.563 and it<br>
is not usable for real live use, only for automated tests which is not<br>
in my interest now (and because of patents). I've calibrated MOS-LQE<br>
with polynomial functions using P.862 PESQ. I will write more on<br>
<a href="http://voipmonitor.org" target="_blank">voipmonitor.org</a> documentation once I've found more time.<br>
<br>
I'm using voipmonitor on central gateway and succesfully monitoring<br>
all SIP traffic and filtering calls by the worst MOS. So yes, you can<br>
use that tool for measuring quality of IP network in realtime. If you<br>
save PCAP files, you can analyze it with wireshark in more depth.<br>
<div><div></div><div class="h5"><br>
<br>
<br>
<br>
<br>
On Sat, May 8, 2010 at 1:42 PM, mosbah abdelkader<br>
<<a href="mailto:mosbah.abdelkader@gmail.com">mosbah.abdelkader@gmail.com</a>> wrote:<br>
> Hello,<br>
><br>
><br>
> First, thank you for your great job.<br>
><br>
><br>
> I want to know why you have choosed to calculate only MOS-LQE. Why you have<br>
> only used G107. Is that model suitable for VoIP operators to have a<br>
> calculated QoS value so they can confirm their quality.<br>
><br>
><br>
> Thanks again and best regards.<br>
><br>
</div></div></blockquote></div><br></div>