[AVT] Re: Review requested: draft-ietf-avt-rtp-toffset-04.txt

["Tom-PT Taylor" <[e-mail]>]

Here is what I hope is the last word on the topic: Dave's actions.

Dave Singer wrote:
-------------------

OK, changed the first sentence:

In the RTP specification <xref target="RFC3550"/> network jitter
calculations are based on the presumption that packets are
transmitted essentially in accordance with their RTP timestamps.

and added

The RTP specification does not define a transmission timestamp, and
nor does this specification.  This specification merely provides
information on the relationship between the relative transmission
times and relative RTP timestamps.

and

The reported transmission time T1 of a packet with timestamp R1 and
an offset of O1, from the above equations, is T1 = R1+O1 (though of
course the transmission time values only have meaning when two or
more are compared).

and

The content is exactly that number of interarrival jitter
calculations, calculated using the same formula as for sender and
receiver reports, but taking into account the transmission offsets
for the streams (if any);  that is, using the values T1=R1+O1, T2
etc. as defined above, instead of R1, R2 etc..

I then re-named the symbols to be in accord with the RTP spec (i.e.
using Si for RTP timestamp, not Ri).


-- 
David Singer
Apple Computer/QuickTime

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