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Streaming Video: Instructional Applications and Considerations

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Hardware/Software Needs. Network. Servers. User ... Testing. Cataloging. How to find the info one wants. Only full programs or clips within programs ... – PowerPoint PPT presentation

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Title: Streaming Video: Instructional Applications and Considerations


1
Streaming Video Instructional Applications and
Considerations
  • Faculty Development Institute
  • Summer 2000

2
The Quest for Scalable and Effective
Instructional Delivery Systems
3
Streaming Video Project Objectives
  • 1 Be on the cutting edge not the bleeding edge

4
Streaming Video Defined
  • One way compressed digital distribution
  • Live or on demand
  • Point-to-point
  • Multicast

5
Streaming Video Project Objectives
  • Distance Learning
  • Live streaming to the desktop
  • Anytime, anyplace video-on-demand
  • Use video-on-demand to replace videotape backup
  • Video-on-demand as supplement to web-based courses

6
Streaming Video Project Objectives
  • Campus
  • Incorporate into class presentations
  • Lecture review
  • Out of class video assignments

7
Streaming Video Project Objectives
  • Continuing Education on-demand seminars
  • Faculty and staff training
  • University marketing

8
Streaming Video Evaluations
  • High and Low Bandwidth Tests
  • Encoding methods
  • Storage requirements
  • Impact on campus local area network
  • Reliability over wide area network
  • Post-production capabilities
  • Support requirements

9
Streaming Tests
  • Real Networks G-2
  • 3CX
  • Cisco IPTV
  • Cam-Vision (MPEG II)
  • IBM Video Charger
  • FVC I -Studio
  • Quicktime
  • Microsoft Media Technology (ASF)

10
Hardware/Software Needs
  • Network
  • Servers
  • User Workstations
  • Application set

11
Quality of Service (QoS)
  • Ability to guarantee timely delivery of data
  • Important in Video
  • Video needs relatively large bandwidth
  • Cant tolerate delay
  • Data loss effects video and audio
  • No time to resend
  • Need priority routing

12
IP - Internet Protocol
  • PROS
  • Its Everywhere
  • Cheap
  • Well known
  • Flat Rate Pricing (Usually)
  • CONS
  • No QoS
  • Subject to information loss
  • Relies on public network

13
Video Quality
  • What quality is needed
  • Based on Bandwidth and QoS
  • Bandwidth Quality
  • Frame rate
  • Picture size (pixels)
  • Picture quality
  • Compression loss

14
Server Network
  • Usually only part of network you control
  • Must support all streams individually
  • Private modem pool?
  • Intranet
  • Extra capacity needed

15
Transport Network
  • Public networks
  • Intranet
  • Private

16
User Network (local ISP)
  • POTS and modems
  • ISDN
  • DSL, Cable modems, etc.
  • Intranet

17
Acquisition
  • Start with best quality
  • Live and/or for storage
  • Classroom feeds and Multimedia
  • Streaming speeds and formats must be decided
    before acquisition
  • Encoder Server/workstation
  • Possible local temporary storage
  • Send to archive storage by network

18
Storage
  • Large amounts required
  • High speed access
  • Expandable disk arrays
  • Server(s) to manage storage access
  • Network

19
Post Production
  • Adding links
  • Defining segments
  • Cataloging
  • Testing

20
Cataloging
  • How to find the info one wants
  • Only full programs or clips within programs
  • With application or external database
  • Web and other access methods

21
Retrieval/Broadcast
  • Security (who gets what)
  • Large delay on live feeds (20-30 seconds)
  • Streaming Server(s)
  • Network
  • Workstation software/hardware

22
Storage Requirements
  • Low bandwidth less than 1 mb per minute
  • High bandwidth 5 mb plus per minute
  • TV Broadcast 45 mb per second
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