RFC Errata
RFC 3611, "RTP Control Protocol Extended Reports (RTCP XR)", November 2003
Source of RFC: avt (rai)
Errata ID: 2262
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Kamil Sarac
Date Reported: 2010-05-14
Held for Document Update by: Robert Sparks
Section 4.6 says:
min_jitter: 32 bits The minimum relative transit time between two packets in the above sequence number interval. All jitter values are measured as the difference between a packet's RTP timestamp and the reporter's clock at the time of arrival, measured in the same units. max_jitter: 32 bits The maximum relative transit time between two packets in the above sequence number interval. mean_jitter: 32 bits The mean relative transit time between each two packet series in the above sequence number interval, rounded to the nearest value expressible as an RTP timestamp. dev_jitter: 32 bits The standard deviation of the relative transit time between each two packet series in the above sequence number interval.
It should say:
min_jitter: 32 bits The minimum jitter measured for a pair of packets in the above sequence number interval. The packet jitter is defined in [9, Section 6.4.1] and measured in timestamp units. max_jitter: 32 bits The maximum jitter measured for a pair of packets in the above sequence number interval. mean_jitter: 32 bits The mean jitter measured for a pair of packets in the above sequence number interval, rounded to the nearest value expressible as a timestamp. dev_jitter: 32 bits The standard deviation of the jitter measured for a pair of packets in the above sequence number interval.
Notes:
In the original RFC 3611 in Section 4.6 where it defines "min_jitter", the jitter definition is different from the one given in RFC3550. This errata report is to correct this difference by referring to RFC 3550 for the proper definition of jitter and revises the definitions of "min_jitter", "max_jitter", "mean_jitter", and "dev_jitter" fields.