desktop videoconferencing
Download
Skip this Video
Download Presentation
Desktop Videoconferencing

Loading in 2 Seconds...

play fullscreen
1 / 13

Desktop Videoconferencing - PowerPoint PPT Presentation


  • 132 Views
  • Uploaded on

Desktop Videoconferencing. by Gerald Knezek & Rhonda Christensen. Terminology. Teleconferencing audio combined audio/video videoconferencing implies audio also (continued). (continued) Desktop Videoconferencing One form of Teleconferencing Phone-line based

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Desktop Videoconferencing' - braden


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
desktop videoconferencing
Desktop Videoconferencing

by

Gerald Knezek

&

Rhonda Christensen

terminology
Terminology

Teleconferencing

  • audio
  • combined audio/video
  • videoconferencing implies audio also(continued)
slide3
(continued)
  • Desktop Videoconferencing
    • One form of Teleconferencing
      • Phone-line based
        • Lumaphone (black &white, $350)
        • Sony, ATT (color, $1K)(continued)
slide4
(continued)
  • Internet based
    • Audio system (Internet Phone, Mave, $0-100)
    • Video/keyboard typing system (Original CU SeeMe, free)
    • Combined Audio-Video (Commercial Systems, <$150)
videoconferencing distinctions
Videoconferencing Distinctions

Frame Refresh Rate

  • > 24 frames per second required to perceive full motion
  • full motion (TV) systems provide 30 FPS
  • partial motion systems provide about 15 FPS

(continued)

slide6
(continued)
    • internet based systems provide 5-15 FPS (CU SeeMe)
    • Slow-Scan TV provides 1 frame every 4 seconds
  • Cost
    • Higher fidelity requires more bandwidth
    • Color costs more
    • Usually trade off audio for video quality
ip addresses
IP Addresses
  • Unique Identifier (like phone number)
  • 129.120.20.91 for Mac Quadra in 322G
  • 129.120.20.127 for Mac Mac IIsi in 322

(continued)

slide8
(continued)
  • 129.120.20.2 for CECS Reflector
    • alias pizza.cecs.unt.edu
  • Similar addresses exist for hundreds of public reflectors
internet conferencing tools
Internet Conferencing Tools
  • CU SeeMe (v.68k0.80b2)
    • videoconferencing from Internet (T-1, SLIP, PPP)
    • point to point vs. reflector
      • max 2 participants with former
      • uninvited participants with latter

(continued)

slide10
(continued)
  • Maven/Internet Phone (v.2.0a37)
    • audioconferencing
    • takes priority over video
  • Special considerations
    • >8 Mb RAM (w/system 7.5) to run both
    • Audio input for AV machines
    • Camera technology
reflector site vs point to point
Reflector Site vs. Point-to-Point
  • Reflector Sites
    • Public
    • Usually allow max. of 8

(continued)

slide12
(continued)
  • Point-to-Point
    • Private
    • Allows max of 2 for CU SeeMe (Mac)
    • Allows max of 8 with Maven
  • Private Reflectors
    • restricted access through code
    • combines privacy and multiple access rights
ad