Webcast Lecture Archive Project

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Webcast Lecture Archive Project

• Status Report

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(No Transcript)
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User Software requirements

• Java-enabled Web Browser
• 97.5 of the internet users
• (Source WebSideStory, August 1999)
• RealPlayer (5.0 or greater) www.real.com
• Windows 3.x, 9x, NT, Red Hat Linux, MAC OS,
  Solaris, SCO Unix, Irix.

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User Network requirements

• 45 kbps (audiovideo)
• LAN (10/100 Mbps)
• E1 (2.048 Mbps) T1 (1.544 Mbps)
• xDSL
• ISDN BRI (1B64kbps)
• 56 kbps modem ITU V.90
• 28.8 and 33.6 kbps modem
• (bad video quality, good audio and slides quality)

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Access Statistics

• Amount of traffic per Directory on
  WEBCAST.CERN.CH
• ----- ------ ---------
• 87796 62.75 /Projects/
• 69373 36.08 /Projects/WebLectureArchive/
• 14414 18.99 /Projects/CSC99/
• 3219 7.63 /Projects/WebUniversity/
• 1295 not listed 5 directories
• http//webcast.cern.ch/Service/stats/
• (report of the 6 Dec. 1999, sum from 1st of
  September)
• more than 100 hosts with more than 100 requests
• 25 different countries with more than 200
  requests

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Production Process (1)
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Production Process (2)
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Directions

• Reduce the human-effort in production
• New integrated software
• RealProducer Active X
• COM PowerPoint presentation
• Zero Post-Production
• Auto tracking camera

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Work-Time (Now)
Total 3x
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Work-Time (Short-Term Target)
Total 1.5x
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Work-Time (Ideal)
Total 0.3x
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Ideal Solution

• The speaker use PowerPoint to make the
  presentation
• On the same machine the audio/video is captured
• Uploading starts immediately afterwards the
  lecture
• Autotracking camera follow the speakers

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Further improvements

• SMIL, Synchronized Multimedia Integration
  Language (W3C)
• Multi-format dynamic conversion
• Define a Lecture Repository Object
• Investigate how to extend toward interactivity

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The Final Bottleneck(Multiple Simultaneous Users
from internet)

• What is necessary to make a large scale solution
• Define the network requirements in terms of QoS
  parameters
• Data-Driven Multimedia Archive
• Define a mirrored Video-Servers architecture

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References

• Web Lecture Archive Project
• http//webcast.cern.ch/Projects/WebLectureArchive/
  
• Browser features (from WebReview)
• http//www.webreview.com/pub/1999/10/29/feature/in
  dex3b.html
• webcast.cern.ch server Statistics
• http//webcast.cern.ch/Service/stats/
• Sync-O-Matic 3000
• http//www.netfact.com/crs/projects/syncomat/
• Real Player
• http//www.real.com/player/
• Microsoft PowerPoint
• http//www.microsoft.com/office/powerpoint/
• SMIL
• http//www.w3.org/AudioVideo/