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Digital Video Over IP

Digital Video Over IP. 정재훈 ( paul@mmlab.snu.ac.kr) 이해원 ( hwlee@mmlab.snu.ac.kr) 서울대학교 멀티미디어 통신 연구실. Contents. What is Digital Video? Applications of Digital Video IEEE 1394 H.323 Video Charger Related Digital Video Issues Future Work of APAN-KR Conclusion. What is Digital Video?.

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Digital Video Over IP

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  1. Digital Video Over IP 정재훈 (paul@mmlab.snu.ac.kr) 이해원 (hwlee@mmlab.snu.ac.kr)서울대학교 멀티미디어 통신 연구실 SNU MMLAB

  2. Contents • What is Digital Video? • Applications of Digital Video • IEEE 1394 • H.323 • Video Charger • Related Digital Video Issues • Future Work of APAN-KR • Conclusion SNU MMLAB

  3. What is Digital Video? • Definition • Representation or encoding of the video signal inthe digital bits for storage, transmission and display • Category • Live Transmission, Video Conference ,Video Broadcasting , Video on Demand • Characteristics • Common Protocol Stacks : RTP/UDP/IP • High Bit Rate : CBR vs VBR • Long-lived Flows • Communication • Unicast vs Multicast SNU MMLAB

  4. Application of Digital Video • Live Transmission (Remote Education) • IEEE 1394 • Video Conference • MBone: sdr, vic, vat, nte, wb • ISABEL • H.323 : MS NetMeeting, PictureTel • Video Broadcasting • IBM Videocharger, RealMedia • Video on Demand • IBM Videocharger SNU MMLAB

  5. DV Camcoder orDV recorder deck DV Camcoder IEEE1394 Internet IEEE1394 PC PC IEEE1394 Interface cardNetwork Interface cardServer Application IEEE1394 Interface cardNetwork Interface cardClient Application Server Client IEEE1394 RTP RTP IEEE1394 UDP UDP IP IP Ethr Ethr DV stream/IEEE1394 DV stream/RTP/UDP/IP/Ethernet DV stream/IEEE1394 IEEE 1394(1/3) SNU MMLAB

  6. IEEE 1394(2/3) • Environment • OS: FreeBSD-3.4 Release • IEEE 1394 Device Driver: Katsushi Kobayashi • Application Programs: Akimichi Ogawa • http://www.sfc.wide.ad.jp/DVTS/ • Applications • Live Transmission (http://coral.apan.snu.ac.kr) • Remote Education • Distance Education b/w USA & Japan • Course: Introduction to Computer Networks • Joining Organizations: WISC, KEIO, NAIST • Term: 2nd Term, 1999 • Limitation • Large Bandwidth: 25Mbps(Full rate) SNU MMLAB

  7. KU Machine 1 SNU Machine 1 SNU ATM Switch KU ATM Switch Seoul APATM Switch SNU Machine 2 KU Machine 2 IEEE 1394(3/3) • Participant University: SNU, Korea Univ. • Test Date: 1999.8.2 19:30~22:30 • netperf measurement : +55Mbps ttt mrtg SNU MMLAB

  8. H.323(1/2) • ITU-T standard for multimedia communicationsservices on packet-switches networks • Software only • Microsoft NetMeeting, PictureTel, Intel, MAXPC • Hardware Assisted • VCON Escort 25, Zydacron Z350 • MEGACONFERENCE • A permanent, ongoing multipoint H.323 Internetvideo conference • http://www.mega-net.net/megaconference/ SNU MMLAB

  9. H.323(2/2) SNU MMLAB

  10. IBM VideoCharger(1/8) Features • Stored session • VOD • Unicast/Multicast • Live session • Video Broadcasting, Remote education, … • Multicast • FutureTel Primeware or Optibase encoder • Web-based interface for playback SNU MMLAB

  11. To Seoul XP Satellite MPEG1/2 Encoder Video Server Multicast Router TV Camcorder IBM VideoCharger(2/8) System Configuration • MPEG 1/2 Encoder • FutureTel Primeware NS-325 • Streaming Server • NT 4.0 • IBM VideoCharger ver 2.0 + service level 4 + TTL bug patch • Client • IBM VideoCharger player ver 2.0 • Windows 95/98/NT SNU MMLAB

  12. IBM VideoCharger(3/8) SNU MPEG Experiment SNU MMLAB

  13. IBM VideoCharger(4/8) • Live session • 3Mbps MPEG1 Traffic SNU MMLAB

  14. IBM VideoCharger(5/8) • Live session • 5Mbps MPEG2 Traffic SNU MMLAB

  15. IBM VideoCharger(6/8) Remote Education Multicast Router Multicast Router Tunnel VC Server Tunnel Multicast Router Tunnel • A/V : MPEG1/2 • (Up to 8Mbps) • Data : Web, • Powerpoint • Remote Presentation, • NTE, WhiteBoard, ... Multicast Router SNU MMLAB

  16. IBM VideoCharger(7/8) Current Problem & Future Plan • VideoCharger problem • MPEG2 live session playback error • Unstable • Future Plan • MPEG2 live session experiment with VC • RealServer + Bitcasting MPEG1 plugin experiment SNU MMLAB

  17. IBM VideoCharger(8/8) Related Activities • Internet2 DVI(Digital Video Initiatives), Digital Video Network(DVN) • Research TV • Video Development Initiative • iCAIR • CANARIE, SURFnet, etc. SNU MMLAB

  18. Related Digital Video Issues • Internet2 QBone: DiffServ • MBone: Multicast • Internet2 DSI SNU MMLAB

  19. Future Work of APAN-KR • I2-DSI storage services • support content delivery to local servers(delegate servers) • Digital Bitcasting Server • IBM Research • developing an I2-DSI-friendly import function to enable IBM VideoCharger servers to serve as streaming video delegates • Future Work • DSI Service at APAN-KR SNU MMLAB

  20. Conclusion • Next-generation Knowledge in Internet • Digital video over IP • Advanced Applications/Users Push Network Evolutions • Short Term • Selection of applications compatible with the target • Long Term • Continuous effort to develop the DV applications • Need to Support Digital Video Applications • QoS • Storage • Multicast SNU MMLAB

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