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

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

3. 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

4. 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

5. Lecture Components Staff communication material video Video Material
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. 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

10. 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

11. 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

12. 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

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

14. 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

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 ー ー internet Power Amplifier
                                                      
Acoustic echo
Power Amplifier
Power Amplifier ー
internet ー

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

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 Microphone Speaker and power amp
8mm,VHS is OK
Microphone
Wireless or wired
Speaker and power amp

20. Q&A
Any questions?