I think it all goes back to the earliest MOS tests ("Hold up the number of
fingers for how good the sound is") and every once in a while somebody actually
does some testing to look for correlations.
Thought it's 15 years old, I like this thesis for the writer's reporting:
https://scholarworks.gsu.edu/cgi/viewcontent.cgi?article=1043&context=cs_theses
In particular, this table shows the correlation, and is consistent with what I
would expect.
[cid:image001.png@01D9EBA9.A25944E0]
Lee
From: NANOG <nanog-bounces+leehoward=hilcostreambank....@nanog.org> On Behalf
Of Dave Taht
Sent: Tuesday, September 19, 2023 8:12 PM
To: NANOG <nanog@nanog.org>
Subject: what is acceptible jitter for voip and videoconferencing?
This message is from an EXTERNAL SENDER - be CAUTIOUS, particularly with links
and attachments.
Dear nanog-ers:
I go back many, many years as to baseline numbers for managing voip networks,
including things like CISCO LLQ, diffserv, fqm prioritizing vlans, and running
voip networks entirely separately... I worked on codecs, such as oslec, and
early sip stacks, but that was over 20 years ago.
The thing is, I have been unable to find much research (as yet) as to why my
number exists. Over here I am taking a poll as to what number is most correct
(10ms, 30ms, 100ms, 200ms),
https://www.linkedin.com/feed/update/urn:li:ugcPost:7110029608753713152/
but I am even more interested in finding cites to support various viewpoints,
including mine, and learning how slas are met to deliver it.
--
Oct 30: https://netdevconf.info/0x17/news/the-maestro-and-the-music-bof.html
Dave Täht CSO, LibreQos
