Monday, June 13, 2011
Tutorial T5 video in IP Magda El-Zarki
2001 VIP – Magda El Zarki III. 6 SL-package over UDP/IP • SL provides: time-numbering • UDP provides: Multiplexing – a field-length checksum service • SL + UDP as the transport protocol? Infocom 2001 VIP – Magda El Zarki III. 7 some problems when using SL/UDP/IP • not other media stream can be synchronized with the MPEG-4 data transferred directly UDP • dynamic scene and concepts for the control of the session could not be extended to not MPEG-4 data •, there is no defined technique for synchronizing MPEG-4 streams from other servers • flows from different servers may face (their sources may be unresolvable destination) in the multicast session • mechanisms must be established for the protection of sensitive data, MPEG-4 (RTP supports Addressed) •, feedback channel must be established for quality control, Infocom 2001 VIP – Magda El Zarki III. 8 RTP and RTCP • real time Transport Protocol, • control protocol transport of real-time • a session consists of a pair of RTP/RTCP channels • usually work over UDP/IP — you can work with other protocols •-to-end protocol, Infocom 2001 VIP – Magda El Zarki III. 9 RTP supports: • Multicasting • load type identification • time stamping • series numbering ...
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Number of pages: 64
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