Noriatsu kudo (kudo@sfc.wide.ad.jp) AI3 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

Overview of SOI ASIA Project Gateway Site (SFC) Asian Partner Sites Relaying lectures through SFC to all asian partners using multicast and satellite Participating in the lectures at the Partner 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 Contents Mirroring Learn through partner’s local mirror server

SOI ASIA class style 60minutes lecture 30minutes Q&A Windows Media 5minutes break 60minutes lecture 30minutes Q&A Windows Media BBS VIC/RAT/(polycom) IRC/RPT

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

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)

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

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

Windows Media version 8 and 9 is recommended Advantage Disadvantage 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) WMT encoder wmt server client Multicast stream 500kbsp Video & Audio 500kbps

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

RPT Power Point remote control tool Functions Advantage Disadvantage 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

polycom Polycom’s View station series Advantage Disadvantage Bandwidth 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

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

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

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

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

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

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

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

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