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DVTS UPDATE

DVTS UPDATE. Keio University / WIDE Project DVTS Consortium Kazunori Sugiura Ph.D. ( uhyo@sfc.wide.ad.jp ) January 23, 2007. Brief update of DVTS for WindowsXP. DVTSng Rev.2. Merge DVTS and HiDVTS applications on one package DV -> use DV mode application

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DVTS UPDATE

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  1. DVTS UPDATE Keio University / WIDE Project DVTS Consortium Kazunori Sugiura Ph.D. ( uhyo@sfc.wide.ad.jp ) January 23, 2007

  2. Brief update ofDVTS for WindowsXP

  3. DVTSng Rev.2 • Merge DVTS and HiDVTS applications on one package • DV -> use DV mode application • JVC HDV -> use HDV-JVC mode application • Sony HDV -> use HDV-SONY mode application • IPv6 multicast (ASM/SSM) update • Rev.1 cannot use IPv6 multicast function • getaddrinfo() doesn’t run -> re-enable • Download URL • http://beta.dvts.info/setup-0.0.0-2.exe other device will be supported on next revision

  4. DV Mode Application Support IEEE1394 output Not support IEEE1394 output Please use HDVout tool instead!! HDV Mode Application

  5. HiDVTS / Camera Output Tool • Functions • HDV(MPEG2) RTP data receive • IPv4, IPv6 • receive port • unicast, multicast (ASM/SSM) • IEEE1394(HDV device) output • only support SONY device (maybe) • Download URL • http://beta.dvts.info/hdvout-setup-1.0.0-1.exe

  6. Select HDV device (camera/VCR) Start/Stop running Select IP version Quit application If you want to use multicast, Specify multicast address, interface and source address (SSM)

  7. MacOS X

  8. New DVTS for Mac-OSX • Was not available in Christmas • Some of the patent issues • Will be available soon  • Totally new code • Internal monitoring and IEEE1394 Output

  9. DVTS with FEC

  10. motivation • Supportive packet loss avoidance mechanism for DVTS with minimal quality loss • Using the network resource effectively • help reducing quality losses • Hopefully collaborate within other packet @ Internet • Dynamic FEC with rate control Mechanism • Dynamically adapting FEC rate to check network bandwidth capability • Frame rate control method reducing bandwidth and quality of video frames in case of fatal bandwidth conditions • Dynamic bandwidth proving via FEC

  11. Practical transport technique FEC rate bandwith Transmission rate Packet loss rate Consumed bandwidth 1/1rate 1/2rate Rate control Rate control FEC 1/3rate FEC Time

  12. DVRelay AIT / Thailand

  13. DVRelay • Frame Reduction • Motion Detection • Packet Loss

  14. dvrelay receiver thin out sender DVTS Receiver DVTS Sender DVRelay • combination of dvsend and dvrecv • Thin-out module is added • Receives DV stream in full-rate (≈30 Mbps) • send in a lower data rate • Used on the path from sender to receiver • It can be cascaded • narrower network can receive lower frame rate

  15. DVTS Receiver Internet DVTS Sender dvrelay DVTS Receiver Frame Reduction (1) • Frame Reduction • Some frames are selected to be dropped • Ranges from 1 to 30 based on quality required • dvrelay thins-out only video portion

  16. Frame Reduction (2) • One DV frame consist from 1500 DIF blocks (NTSC format) • Audio, video, and control blocks • Video blocks are dropped from selected frames • Audio and controls blocks are relayed to keep audio quality intact • Frames are selected based on RTP timestamp • It increases 3003 for every frame • IP packet can carry maximum 17 DIF blocks • With 1500 bytes MTU H: header, S: subcode, VA: auxiliary audio, A: audio, V: video

  17. Frame Reduction (3) • Result • dvsend sends full-rate DV stream • dvrelay thin-outs frames from 30fps to 10fps • dvrecv receives 10fps DV stream

  18. - = Motion Detection(1) • Bandwidth consumption can be improved by exploiting the motion in DV stream • Sometimes DV stream does not contains much mobility • Like power-point presentations, face to face conferencing • Dynamically adjust frame rate based on amount of motion • Two required elements: • Motion Detection Mechanism • Frame Rate Adjustment Mechanism

  19. Motion Detection (2)

  20. Packet Loss (1) • dvrelay • Simply sends all the DIF blocks from non-discarded frames while it sends only the audio and control blocks from the discarded frames -- at incoming rate • This behavior creates traffic fluctuation in the network which generates bursty traffic hence packet loss for narrowband networks • Packet loss means incomplete VDO frames

  21. Packet Loss (2) • To prevent traffic fluctuation • A application level queue is added in dvrelay outgoing interface • First In First Out (FIFO) • Send packets a in constant bit rate • Packet sending rate is calculated from the outgoing frame rate of dvrelay

  22. Packet Loss (3) • Network operation on narrow bandwidth networks (eg. Satellite Link) • Queuing mechanism like ALTQ is used maintain the priorities for various kinds of traffic • Network administrators try to assign highest priority to DVTS streaming traffic to prevent packet loss

  23. Future Works

  24. What (DVTS) need to do • Vista capability check • Conference XP Collaboration • AccessGrid Collaboration • MPEG2 and QT

  25. Some Demos

  26. Network Collaboration Game“Andrew Rivolski” • Andrew Rivolski is a multiplayer network game played in an environment consisting of multiple displays over the Internet. • Various demos • Collaboration with USC, RZC • Demo during SIGGRAPH 2006 • DMC Symposium 2006

  27. Multi Screen Network CollaborationGame • “Andrew Rivolski” • Maneuver satellite by using the foot panel • Avoid hit by the meteors • 2 different Player A Satellite Player B

  28. Practical Demo • Remote Conference Studio@SIGGRAPH 06 • Andrew Rivolski Network Game • DMC Symposium 2006 Fall

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