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Broadcasting Technology: Overview

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UNESCO-ABU ICT Roadshow in Sri Lanka, 25-26 June 2010

Published in: Technology, Business
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Broadcasting Technology: Overview

  1. 1. Prof. Gihan Wikramanayake University of Colombo School of Computing Broadcasting Technology: Overview
  2. 2. Developments <ul><li>Electromagnetism </li></ul><ul><li>Electromagnetic waves </li></ul><ul><li>Radio </li></ul><ul><li>TV </li></ul><ul><li>Colour </li></ul><ul><li>Video Tapes </li></ul><ul><li>Optical media </li></ul><ul><li>Satellite Broadcasting </li></ul>Physics Science Technology Energy
  3. 3. Developments... <ul><li>Stereo </li></ul><ul><li>Internet </li></ul><ul><li>Digital </li></ul><ul><li>High definition </li></ul><ul><li>3-D </li></ul>
  4. 4. Broadcasting <ul><li>Distribution of Audio signals </li></ul><ul><li>Distribution of Video signals </li></ul>
  5. 5. Broadcasting... <ul><li>Distribution of Audio signals </li></ul><ul><li>Distribution of Video signals </li></ul>
  6. 6. One-way Media Basic Text Print Audio Audio clip Images Photographs Video Video clips
  7. 7. One-way Media Basic Text Print Audio Audio clip Images Photographs Video Video clips Intermediate Web pages Podcasts CD/ DVD Annotations
  8. 8. One-way Media Basic Text Print Audio Audio clip Images Photographs Video Video clips Advanced Blogs ipod downloads Animations Vods
  9. 9. Two-way Media Basic Text e-mail Audio Telephone support Images Image banks Video Webcasts/ TV
  10. 10. Two-way Media Basic Text e-mail Audio Telephone support Images Image banks Video Webcasts/ TV Intermediate Computer conferencing Telephone conferencing Share and edit Skype
  11. 11. Two-way Media Basic Text e-mail Audio Telephone support Images Image banks Video Webcasts/ TV Advanced Wikis Blogs Audio graphics Simulations/ games Video conferencing
  12. 12. Communications Modes <ul><li>Asynchronous </li></ul><ul><li>Delayed communication </li></ul><ul><li>Synchronous </li></ul><ul><li>Live </li></ul>
  13. 13. Asynchronous Tools Tool Useful for Discussion boards Dialogue that takes place over a period of time Web logs (Blogs) Sharing ideas and comments Messaging (e-mail) One-to-one or one-to-many communications Streaming audio Communicating or teaching Streaming video Communicating or teaching Narrated slideshows Communicating or teaching
  14. 14. Asynchronous Tools... Tool Useful for &quot;Learning objects&quot; (Web-based training) Teaching and training Document libraries Managing resources Databases Managing information and knowledge Web books Teaching and training Surveys and polls Capturing information and trends Shared Calendars Coordinating activities Web site links Providing resources and references
  15. 15. Synchronous Tools Tool Useful for Audio conferencing Discussions and dialogue Web conferencing Sharing presentations and information Video conferencing In-depth discussions with higher-touch interactions Chat Information sharing of low-complexity issues Instant messaging Ad hoc quick communications White boarding Co-development of ideas Application sharing Co-development of documents

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