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AI 3 meeting(Work Shop)

AI 3 meeting(Work Shop). Noriatsu kudo (kudo@sfc.wide.ad.jp). Today ’ s agenda. SOI ASIA class style Applications for real time class Audio Video settings in class room. Gateway Site (SFC). Overview of SOI ASIA Project. Asian Partner Sites.

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AI 3 meeting(Work Shop)

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  1. AI3 meeting(Work Shop) Noriatsu kudo (kudo@sfc.wide.ad.jp)

  2. Today’s agenda • SOI ASIA class style • Applications for real time class • Audio Video settings in class room

  3. Gateway Site (SFC) Overview of SOI ASIA Project Asian Partner Sites Relaying lectures through SFC to allasian partners using multicast and satellite Participating in the lectures at thePartner Institutions The Internet SOI Mirror Server Giving Lectures from sites with wide network LAN Giving Lectures from sites any place on the Internet (Japan, US and so on) SOI ContentsMirroring Learn through partner’s local mirror server

  4. 60minuteslecture 30minutesQ&A SOI ASIA class style 5minutes break Windows Media BBS VIC/RAT/(polycom) IRC/RPT

  5. material video Lecture • Components • Video • WMT • VIC/RAT • Material • PowerPoint • PDF • Staff communication • IRC（recommended） • MSN messenger • Yahoo messenger

  6. Break • Change codec from WMT to VIC/RAT • Collect questions from student • For Interactive • Tell staff about it via IRC • For non interactive • Submit questions to BBS • Tape change(SFC ONLY)

  7. Q&A • Three ways to ask question • Audio and Video (interactive) • BBS • IRC/MSN(not recommended)

  8. Applications for real time class • Windows Media Player • VIC/RAT • RPT • Polycom • IRC

  9. Video & Audio wmt server WMT encoder Multicast stream 500kbsp client client client client Windows Media • version 8 and 9 is recommended • Advantage • Multicast ready • Stable streaming with "un-stable-" or "non-" return path. • Disadvantage • Delay(30-60seconds) • Windows only • Future work • IPv6 support • Bandwidth • 500kbps(audio+video) 500kbps

  10. Vic/rat encoder Video & Audio client client client client VIC/RAT To send and receive video and audio • Advantage • No delay • FreeBSD,Linux,solalis support • Multicast ready • IPv6 support • Disadvantage • Require return path • Bandwidth • 1.5Mbps(video) • 512kbps(audio) 64kbps-128kbps 1.5M video512k audio

  11. RPT Power Point remote control tool • Functions • Send and receive timing info via IRC • Record timing info for archive • Advantage • Doesn’t need multicast • Disadvantage • Require IRC connection IRC network client client client client

  12. polycom Polycom’s View station series • Advantage • Built-in echo canceller • All in one system • Multipoint support(up to 4 site) • Disadvantage • Doesn’t support multicast • Doesn’t support asymmetric link • Bandwidth • 64kpps-3Mbps • For multipoint 512kbps is maximum 64k-512kbps

  13. AV equipments for class room • Microphone • Audio mixer • Echo canceller • DV camera • Speaker • etc

  14. Standard AV layout for remote classrooms Echo canceller Audio mixer Power amp speaker Video camera (3) (2) (5) (4) Vic/rat projector Class roomPA systemor microphone (1) (9) (10) (11) (9) (7) (6) (10) (11) (1) (7) (6) Class roomPA systemor Speaker + power amp (2) (3) (4) (5) (8) (8) Ver1.0 6/3 by Noriatsu Kudo

  15. Audio mixer • Control all of audio equipments • Requirements • At least 2 mic input/2 Line input • At least 2-bus • Recommendation • Behringer MX1604A • Behringer UB1204FX-PRO

  16. Echo Canceller(1) Acoustic echo Power Amplifier Power Amplifier ー internet ー

  17. Echo Canceller(2) Acoustic echo line echo Power Amplifier Power Amplifier internet ー

  18. Echo canceller(3) • Acoustic echo canceller • recommendation • Behringer DSP 1124p Feedback destroyer pro • Polycom EF400 • Polycom EF2280（line echo canceller)

  19. Other equipments • DV camera • 8mm,VHS is OK • Microphone • Wireless or wired • Speaker and power amp

  20. Q&A Any questions? soi-asia@soi.wide.ad.jp

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