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1 © 1999, Cisco Systems, Inc. Course Number Presentation_ID Status Report on MP2T Extension to RTP Humphrey Liu/Steve Casner.

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Presentation on theme: "1 © 1999, Cisco Systems, Inc. Course Number Presentation_ID Status Report on MP2T Extension to RTP Humphrey Liu/Steve Casner."— Presentation transcript:

1 1 © 1999, Cisco Systems, Inc. Course Number Presentation_ID Status Report on MP2T Extension to RTP Humphrey Liu/Steve Casner

2 2 IETF-Washington © 1999, Cisco Systems, Inc. Review of the Extension This extension differs from RFC2250 in two aspects –Base frequency for timestamp increase to 27MHz –Introduction of “piece-wise” CBR Timestamp for every MPEG transport packet can be derived Ready for VBR MPEG-compliant traffic

3 3 IETF-Washington © 1999, Cisco Systems, Inc. Objective of the Prototype To demonstrate the feasibility of the draft To promote DTV delivery over IP network To prove that the output MPEG transport stream from RTP receiver is MPEG compliant, even with significant network traffic

4 4 IETF-Washington © 1999, Cisco Systems, Inc. Point of Verification Dejitter Buffer MPEG TS Buffer Muxing Buffer Elem. Buffer RTP Packet MPEG TS packet MPEG PES pkt MPEG comp. layer AT the output of dejitter buffer where MPEG2 transport stream is recovered Can be verified with MPEG2 analyzer

5 5 IETF-Washington © 1999, Cisco Systems, Inc. Test Environment FTP/Voice Over IP Traffic MPEG2 Source MPTS R2 Cat5000 Switch MPEG2 Analyzer IP/TV 3.0 Sever Cat5000 Switch IP/TV 3.0 Client PC Voice Over IP Client/FTP client R2 TT1100 MPEG Decoder ASI 100BT DS3 ASI BT Hub Sniffer Hub Sniffer RTP Sender RTP Receiver

6 6 IETF-Washington © 1999, Cisco Systems, Inc. R2 R2 is a PC with DVB-ASI PCI card running Linux. Each R2 has two 100BT Ethernet ports RTP based on the draft, RTSP, and IGMP have been implemented at R2. Also, TOS field is programmable for all RTP packets

7 7 IETF-Washington © 1999, Cisco Systems, Inc. Environment at Sender Side A prototype system based on the extension is implemented and under test –RTP extension –RTSP/SDP to support the extension –Integration of RTSP and multicast The prototype system has tested under multicast environment as well

8 8 IETF-Washington © 1999, Cisco Systems, Inc. The Experiment Source Configuration –MPEG/RTP sender (R2) Input MPEG stream: 30Mbps –Cisco IPTV server 5 IPTV streams totaling 7.5Mbps For RTP interoperability test For traffic loading test –FTP server For loading test –Future IP traffic Cisco’s Callgen, VoIP based on RTP implementation

9 9 IETF-Washington © 1999, Cisco Systems, Inc. The Experiment (Cont.) Destination Configuration –MPEG/RTP receiver –IPTV client –FTP client –Professional MPEG decoder For bitstream visual monitoring –MPEG Analyzer for rigid stream verification –Network sniffer To monitor IP traffic

10 10 IETF-Washington © 1999, Cisco Systems, Inc. Qualitative Result Successful operation test –RTP receiver doesn’t process any RTP packet until SDP is obtained and verified through RTSP Compliance test –No MPEG warning generated from MPEG analyzer even with high network traffic load –PCR jitter is within +/-250ns Quantitative result on dejitter buffer will follow

11 11Presentation_ID © 1999, Cisco Systems, Inc.


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