Re: [AVT] Clock skew and RTP

[Colin Perkins <csp@isi.edu>]

--> Dominique Fober writes:
>Thanks a lot for your replies. It answers my question: resuming the
>thread, it appears that RTP provides a mean to detect the clock skew to
>NTP synchronized hosts via the SR RTCP packets, but don't include (itself
>or using a dedicated payload) an explicit solution.

The mapping in RTCP SR packets is used for lip-synchronization, but is not
needed to estimate clock skew between sender and receiver. The receiver can
estimate skew by looking at the relative offset between the RTP timestamps
in packets it receives, and its local media clock.

Colin
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