Tutorial T5 Video Over IP Magda ElZarki (University of California ...

Source: www.ics.uci.edu
Topic: SAP Tutorial

Short Desciption:
Outline of Tutorial. 1. Part 1:. 1. Overview of Video Compression. 2. The MPEG suite ..... (Sessions can be advertised using SAP email etc.) ...

 

Content Inside:
Tutorial T5 Video Over IP Magda ElZarki (University of California at Irvine) Monday 23 April 2001 MorningPage 1Infocom 2001VIP Magda El ZarkiIII.1Tutorial T5Video Over IPMagda ElZarki (University of California at Irvine)Monday 23 April 2001 MorningPage 2MPEG4 over IP Part 3Magda El ZarkiDept. of ICSUC Irvineelzarki@uci.eduPage 3Infocom 2001VIP Magda El ZarkiIII.3Outline of Tutorial1. Part 1:1. Overview of Video Compression2. The MPEG suite3. Video Quality2. Part 2:1. MPEG43. Part 3:1. MPEG4 Delivery over IP4. ConclusionsPage 4Infocom 2001VIP Magda El ZarkiIII.4MPEG4 Delivery over Internet TCP/IP SLpacket over UDP RTP/UDP/IP Signaling MPEG4 Delivery ArchitecturePage 5Infocom 2001VIP Magda El ZarkiIII.5TCP/IP Not suitable for realtime Retransmissions can lead to high delayand cause delay jitter Does not support multicast Congestion control mechanism (slowstart) not suitable for AV mediaPage 6Infocom 2001VIP Magda El ZarkiIII.6SLpacket over UDP/IP SL provides: Timing Sequence numbering UDP provides: Multiplexing Length field Checksum service SL+UDP as transport protocol?Page 7Infocom 2001VIP Magda El ZarkiIII.7Some of the Problems when usingSL/UDP/IP No other media stream can be synchronized with MPEG4 datacarried directly over UDP The dynamic scene and session control concepts cannot beextended to nonMPEG4 data No defined technique for synchronizing MPEG4 streams fromdifferent servers Streams from different servers may collide (their sources maybecome unresolvable at the destination) in a multicast session Mechanisms need to be defined to protect sensitive MPEG4data (RTP supports FEC) A feedback channel must be defined for quality controlPage 8Infocom 2001VIP Magda El ZarkiIII.8RTP & RTCP Real time Transport Protocol Real time Transport Control Protocol A session consists of an RTP/RTCPpair of channels Usually works over UDP/IP Can work with other protocols Endtoend protocolPage 9Infocom 2001VIP Magda El ZarkiIII.9RTP Supports: Multicasting Payload type ...

 

 

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