Hello,
I would like to analyse the RTP protocol with Ethereal, especially I am
concerned about the Jitter calculation. Below is the example of a RTP statistic
displayed with Ehereal.
Packet Sequence Delay Jitter
106 39378 0 0
107 39379 0.002983 0.001689
108 39380 0.006785 0.003034
109 39381 0.003869 0.004478
110 39382 0.004391 0.005798
As I read on the mailing list, the Jitter is calculated with the following
formula:
J = J + ( | D(i-1, i) | - J) / 16
where J is jitter and D is delay between two frames
If I apply this formula to the sequence above I don't get wright result
(for example: 0.001689+(0.006785-0.001689)/16=0.0020075<>0.003034)
Do you know where is the problem? Do you really use the above formula to
calculate the Jitter or I just apply it in a wrong way?
Thank's for the answers
regards
Simon
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