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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

Digital Video Over IP

정재훈 (paul@mmlab.snu.ac.kr)

이해원 (hwlee@mmlab.snu.ac.kr)서울대학교 멀티미디어 통신 연구실

SNU MMLAB


Contents
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


What is digital video
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


Application of digital video
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


Ieee 1394 1 3

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


Ieee 1394 2 3
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


Ieee 1394 3 3

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


H 323 1 2
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


H 323 2 2
H.323(2/2)

SNU MMLAB


Ibm videocharger 1 8
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


Ibm videocharger 2 8

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


Ibm videocharger 3 8
IBM VideoCharger(3/8)

SNU MPEG Experiment

SNU MMLAB


Ibm videocharger 4 8
IBM VideoCharger(4/8)

  • Live session

  • 3Mbps

MPEG1 Traffic

SNU MMLAB


Ibm videocharger 5 8
IBM VideoCharger(5/8)

  • Live session

  • 5Mbps

MPEG2 Traffic

SNU MMLAB


Ibm videocharger 6 8
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


Ibm videocharger 7 8
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


Ibm videocharger 8 8
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


Related digital video issues
Related Digital Video Issues

  • Internet2 QBone: DiffServ

  • MBone: Multicast

  • Internet2 DSI

SNU MMLAB


Future work of apan kr
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


Conclusion
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