The document discusses different types of broadcasting technologies and media, including electromagnetic waves, radio, TV, video tapes, satellites, and digital technologies. It also categorizes media as one-way or two-way, with examples such as print, audio, images, video, email, and blogs. Finally, it outlines asynchronous tools like discussion boards and blogs that enable delayed communication, as well as synchronous tools like audio/video conferencing and chat that allow for live interaction.

1. Prof. Gihan Wikramanayake University of Colombo School of Computing Broadcasting Technology: Overview

2. Developments Electromagnetism Electromagnetic waves Radio TV Colour Video Tapes Optical media Satellite Broadcasting Physics Science Technology Energy

3. Developments... Stereo Internet Digital High definition 3-D

4. Broadcasting Distribution of Audio signals Distribution of Video signals

5. Broadcasting... Distribution of Audio signals Distribution of Video signals

6. One-way Media Basic Text Print Audio Audio clip Images Photographs Video Video clips

7. One-way Media Basic Text Print Audio Audio clip Images Photographs Video Video clips Intermediate Web pages Podcasts CD/ DVD Annotations

8. One-way Media Basic Text Print Audio Audio clip Images Photographs Video Video clips Advanced Blogs ipod downloads Animations Vods

9. Two-way Media Basic Text e-mail Audio Telephone support Images Image banks Video Webcasts/ TV

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. 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. Communications Modes Asynchronous Delayed communication Synchronous Live

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. Asynchronous Tools... Tool Useful for "Learning objects" (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. 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