RE: [AVT] RTP/RTCP Timestamp and transmission time

Colin

Does the RTCP PPDV/jitter calculation accomodate this situation where a
burst of RTP packets with the same TS are sent (or RTP frames are not
transmitted with uniform spacing)?

Alan Clark
Telchemy

-----Original Message-----
From: avt-admin@ietf.org [mailto:avt-admin@ietf.org]On Behalf Of Colin
Perkins
Sent: Friday, September 19, 2003 7:31 PM
To: Lorenzo Polidori
Cc: avt@ietf.org
Subject: Re: [AVT] RTP/RTCP Timestamp and transmission time

On Friday, Sep 19, 2003, at 08:36 Europe/London, Lorenzo Polidori wrote:

> At 12.56 18/09/2003 +0100, Colin Perkins wrote:
>
>> You need to schedule the transmission time of the RTP packets
>> according
>> to their RTP timestamp. Since the packets are timed, there is a
>> correlation with the wall-clock.
>
> Ok, now it's clear, thanks all. But I have an other question. I must
> schedule  the transmission time of the RTP packets and the packets
> containing the same MPEG2 picture have the same RTP TS, since the time
> reference of the slides belonging to the same picture does not change.
> Am I
> obliged to send a burst of RTP data packets every MPEG2 scheduled
> picture,
> containing all the relative slides?

You are not obliged to send them in a burst, however RTP provides no
way for the receiver to distinguish sender-induced delay from
network-induced delay.

--
Colin Perkins
http://csperkins.org/

_______________________________________________
Audio/Video Transport Working Group
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_______________________________________________
Audio/Video Transport Working Group
avt@ietf.org
https://www1.ietf.org/mailman/listinfo/avt