AI3 meeting(Work Shop)
Noriatsu kudo ([email protected])
Today’s agenda
SOI ASIA class styleApplications for real time classAudio Video settings in class room
Overview of SOI ASIA Project
SOI ContentsMirroring
Giving Lectures from sites with wide network
Asian Partner Sites
SOI Mirror Server
LANLAN
Gateway Site (SFC)
The InternetThe Internet
Participating in the lectures at thePartner Institutions
Relaying lectures through SFC to allasian partners using multicast and satellite
Giving Lectures from sites any place on the Internet (Japan, US and so on)
Learn through partner’s local mirror server
SOI ASIA class style
60minuteslecture
30minutesQ&A
Windows Media
BBS
VIC/RAT/(polycom)
5minutes break
IRC/RPT
Lecture
Components Video
WMT VIC/RAT
Material PowerPoint PDF
Staff communication IRC( recommended) MSN messenger Yahoo messenger
material video
Break
Change codec from WMT to VIC/RATCollect 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 PlayerVIC/RATRPTPolycomIRC
Windows Mediaversion 8 and 9 is recommendedAdvantage 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 client clientclient
Multicast stream 500kbsp
Video & Audio
500kbps
VIC/RATTo 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)
Vic/rat encoder
client client clientclient
Video & Audio
1.5M video512k audio
64kbps-128kbps
RPT
Power Point remote control toolFunctions Send and receive timing info via IRC Record timing info for archive
Advantage Doesn’t need multicast
Disadvantage Require IRC
connection
client client clientclient
IRC network
polycom
Polycom’s View station seriesAdvantage 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
MicrophoneAudio mixerEcho cancellerDV cameraSpeakeretc
Standard AV layout for remote classrooms
Audio mixer
Vic/rat
Echo canceller
(1)
(1)
(2) (3)
(4) (5)
(2)(3) (4)(5)
(6)
(6)
(7)
(7)
(8)
(8)
speaker
Power ampClass roomPA system
orSpeaker + power amp
(9)
(9)
(10) (11)
(10) (11)
Class roomPA system
ormicrophone
Ver1.0 6/3 by Noriatsu Kudo
Video camera
projector
Audio mixer
Control all of audio equipmentsRequirements At least 2 mic input/2 Line input At least 2-bus
Recommendation Behringer MX1604A Behringer UB1204FX-PRO
Echo Canceller(1)
Power Amplifier
Power Amplifier
ー ー
Acoustic echo
internet
Echo Canceller(2)
Power Amplifier
Power Amplifier
ー
Acoustic echo
internet
line echo
Echo canceller(3)
Acoustic echo cancellerrecommendation Behringer DSP 1124p Feedback
destroyer pro Polycom EF400 Polycom EF2280( line echo canceller)
Other equipments
DV camera 8mm,VHS is OK
Microphone Wireless or wired
Speaker and power amp