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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.

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