AI3 meeting(Work Shop)

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

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

Q&A

Any questions?

soi-asia@soi.wide.ad.jp