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					High Quality Video Broadcast
        System for
  Next Generation Internet
         Kazunori Sugiura(CRL)
     Motonori Nakamura(Kyoto Univ.)
       Akihiko Machizawa(CRL)_
      Takahiro Kikuchi(RCAC,TDI)
        Naoto Morishima(NAIST)
        Shin-ichi Nakagawa(CRL)


                            With cooperation of: WIDE Project
      Characteristics of Internet
• best effort basis network
• Network Characteristics…
  –   Jitter
  –   Network Packet losses
  –   Congestion Control
  –   affects Stream media(Stream packet)
       Current Internet Video
       Broadcasting System
• Limitation in Network Bandwidth
• Massive compression of Video and Audio
  data
• Realtime Teleconferencing System
  – High cost equipment
      Requirements(Request)
• High Quality Picture
     • NTSC Quality Video
• High Quality Sound
     • CD Quality Audio
• Delayless transfer
• low cost solution
• Mid range bandwidth( 10Mbps and higher )
       Required Network Bandwidth
               is expanding
Amount of network bandwidth(Byte)

1G
100M

10M

1M

100K

10K


               1990     1994        1998   2002         2004
                                                  (Year)
     Development of Network
           Bandwidth
• Use of Mid-High speed network becomes
  realistic
• appearance of high-speed networks
  – ATM
  – WDM
• High Speed LANs
  – 100BaseT, Gigabit Ethernet
Internet Live Broadcasting
          System




          Internet


PC                      Router
                   Internet Live
            Broad and Multi-cast System

        PC Monitor
                                       Wireless Mic.
                                       Audio Selector
         Keyboard

 DV Video recorder                     Video Input

                                       Monitor, Antenna
   RealServer
                                       DV Video Recorder
     Real Client
                                       Video Selector
NTSC PAL SECAM
RGB Scan Converter
                                       Main Power Supply
Main Power Supply

                     Rack 1   Rack 2
  Internet Connection from KRP(19990727)
              2/166                  2/166                  1/166

   NTT                 Tokyo Univ.            Tokyo Univ.           Tokyo Univ.
Atomis 7M               Megalink                 aa03                  aal3

      0/166
                                                                             1/166
  KDD                    KDD
Atomis 7M              Cisco7507                                       JGN
              1/166
                                                                      FORE
                                              Internet
                                                                             1/166

   3F KRP      1/155     3F KRP      24/155    ASTEM        24/155 Kyoto Univ.
  Cisco7206             Atomis 7m             Atomis 7m                 7m



                                                                        ATM Line
                KRP
                                                                       100BaseTX
                                                                       Ethernet
Octets
         Network Traffic




                           Time
         DV Conference System
Output
           Network Traffic
Octets




                                Time

				
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posted:6/3/2013
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