RE: [AVT] RTP streaming and adaptation to AVC of an SVC temporalscalable bitstream - Packet loss
<Ye-Kui.Wang@nokia.com> Sun, 19 August 2007 05:35 UTC
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Subject: RE: [AVT] RTP streaming and adaptation to AVC of an SVC temporalscalable bitstream - Packet loss
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Thread-Topic: [AVT] RTP streaming and adaptation to AVC of an SVC temporalscalable bitstream - Packet loss
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From: Ye-Kui.Wang@nokia.com
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OK, forget about my naïve question, because I found the following sentence in RFC 3550, "If multiple data packets are re-encoded into one, or vice versa, a translator MUST assign new sequence numbers to the outgoing packets." BR, YK >-----Original Message----- >From: Wang Ye-Kui (Nokia-NRC/Tampere) >Sent: Sunday, August 19, 2007 12:59 AM >To: 'ext Colin Perkins' >Cc: daniele@bsoft.info; avt@ietf.org >Subject: RE: [AVT] RTP streaming and adaptation to AVC of an >SVC temporalscalable bitstream - Packet loss > > >Hi Colin, > >Thanks for your clarification. But according to the following >sentence copied from Daniele's email, > >"... then the SVCtoAVC adapter doesn't know whether this loss >has to be signaled to the receiver, i.e. whether it must >insert a sequence number gap in the outcoming RTP stream...", > >the SVCtoAVC adapter uses a different RTP sequence number >value space for the outcoming RTP steam than the incoming RTP >stream. Is this what a translator can do? It is not clear how >the SVCtoAVC adapter handles the CC, SSRC and CSRC fields and >RTCP traffic, though. > >BR, YK > >>-----Original Message----- >>From: ext Colin Perkins [mailto:csp@csperkins.org] >>Sent: Saturday, August 18, 2007 9:07 PM >>To: Wang Ye-Kui (Nokia-NRC/Tampere) >>Cc: daniele@bsoft.info; avt@ietf.org >>Subject: Re: [AVT] RTP streaming and adaptation to AVC of an SVC >>temporalscalable bitstream - Packet loss >> >>On 18 Aug 2007, at 18:36, <Ye-Kui.Wang@nokia.com> wrote: >>> In your example the SVCtoAVC adapter is an RTP mixer, which >>terminates >>> the RTP session between the sender and itself and restarts >>another RTP >>> session between itself and the receiver. >>> Therefore the RTP sequence number needs to be updated for the base >>> layer packets anyway. >> >>If the SVCtoAVC adapter is a transcoder from an SVC stream to an AVC >>stream, it will be an RTP translator, not an RTP mixer. >>Neither an RTP translator or a RTP mixer terminate the RTP >session. RFC >>3550 and draft-ietf-avt-topologies-06.txt discuss this in more detail. >> >>-- >>Colin Perkins >>http://csperkins.org/ >> >> >> _______________________________________________ Audio/Video Transport Working Group avt@ietf.org https://www1.ietf.org/mailman/listinfo/avt
- [AVT] RTP streaming and adaptation to AVC of an S… daniele renzi (bsoft)
- RE: [AVT] RTP streaming and adaptation to AVC of … Thomas Schierl
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- Re: [AVT] RTP streaming and adaptation to AVC of … Colin Perkins
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- Re: [AVT] RTP streaming and adaptation to AVC of … daniele renzi (bsoft)
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- Re: [AVT] RTP streaming and adaptation to AVC of … daniele renzi (bsoft)
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- Re: [AVT] RTP streaming and adaptation to AVC of … daniele renzi (bsoft)
- Re: [AVT] RTP streaming and adaptation to AVC of … daniele renzi (bsoft)
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- Re: [AVT] RTP streaming and adaptation to AVC of … daniele renzi (bsoft)
- RE: [AVT] RTP streaming and adaptation to AVC of … Ye-Kui.Wang
- Re: [AVT] RTP streaming and adaptation to AVC of … daniele renzi (bsoft)
- Re: [AVT] RTP streaming and adaptation to AVC of … Thomas Wiegand
- Re: [AVT] RTP streaming and adaptation to AVC of … daniele renzi (bsoft)
- [AVT] Interop issue with H263-1998 Franceschini Guido
- RE: [AVT] Interop issue with H263-1998 Gary Sullivan
- Re: [AVT] Interop issue with H263-1998 Randell Jesup
- Re: [AVT] Interop issue with H263-1998 Colin Perkins
- Re: [AVT] Interop issue with H263-1998 Randell Jesup
- RE: [AVT] Interop issue with H263-1998 Even, Roni
- Re: [AVT] Interop issue with H263-1998 Randell Jesup
- RE: [AVT] Interop issue with H263-1998 Even, Roni
- RE: [AVT] Interop issue with H263-1998 Franceschini Guido
- RE: [AVT] Interop issue with H263-1998 Even, Roni
- RE: [AVT] Interop issue with H263-1998 Franceschini Guido
- RE: [AVT] Interop issue with H263-1998 Even, Roni
- RE: [AVT] Interop issue with H263-1998 Franceschini Guido