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

Qiaobing Xie <Qiaobing.Xie@motorola.com> Sun, 11 February 2007 21:12 UTC

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Date: Sun, 11 Feb 2007 15:11:57 -0600
From: Qiaobing Xie <Qiaobing.Xie@motorola.com>
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To: Tom-PT Taylor <taylor@nortel.com>
Subject: Re: [AVT] Re: Review requested: draft-ietf-avt-rtp-toffset-04.txt
References: <4586E60E.20408@nortel.com> <4586E8D6.2070903@nortel.com> <4586E73C.50901@nortel.com> <p06230912c1d2511793b0@[10.0.1.33]> <45ACF914.8040700@nortel.com> <p062309a0c1dcda6fe8ca@[10.0.1.33]> <E319D2A3-2E44-4795-86D8-63465DDC300B@csperkins.org> <p062309c2c1e37868bb4e@[10.0.1.33]> <4A9A2D76-48B4-4C8A-8D29-3B2497C055F1@csperkins.org> <45CBB657.4010200@nortel.com>
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I agree. The proposed changes address my comments sufficiently.

regards,
-Qiaobing

Tom-PT Taylor wrote:
> 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).
> 
> 
> 
> ------------------------------------------------------------------------
> 
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> Audio/Video Transport Working Group
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