overview of vedio conferencing


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overview of vedio conferencing

  1. 1. Videoconferencing Nwal said alghafri U082932
  2. 2. &quot;Facing the Challenge of a New Age&quot; <ul><li>“ This new world of geographical togetherness has been brought about, to a great extent, by man's scientific and technological genius. Man has been able to dwarf distance, place time in chains and carve highways through the stratosphere. Through our scientific genius, we have made the world a neighborhood…” </li></ul><ul><li>Martin Luther King, Jr., December, 1956 </li></ul>
  3. 3. Videoconferencing – What Is It? <ul><li>“ Video conferencing in its most basic form is the transmission of image (video) and speech (audio) back and forth between two or more physically separate locations.” </li></ul>
  4. 4. Videoconferencing Components <ul><li>Cameras (to capture and send video from your local endpoint) </li></ul><ul><li>Video displays (to display video received from remote endpoints) </li></ul><ul><li>Microphones (to capture and send audio from your local endpoint) </li></ul><ul><li>Speakers (to play audio received from remote endpoints) </li></ul>
  5. 5. Two Additional Requirements: <ul><li>Codec - &quot;compressor/de-compressor“ - makes the audio/video data &quot;small enough&quot; to be practical for sending over expensive network connections. A codec takes analog signals, compresses and digitizes them, and transmits the signals over digital phone lines. </li></ul><ul><li>The Supporting System and the Network Connection </li></ul>
  6. 6. But It’s Much More Than Video: <ul><li>Computer presentations </li></ul><ul><li>Other media </li></ul><ul><ul><li>CDs, DVDs, </li></ul></ul><ul><li>ELMO visual presenter (hardcopies, photos) </li></ul>
  7. 7. Various Uses: <ul><li>Presentations </li></ul><ul><li>Virtual meetings </li></ul><ul><li>Videoconference-based learning </li></ul><ul><li>JIT (just in time) events </li></ul><ul><li>Recruitment/search committees </li></ul><ul><li>General meetings </li></ul>
  8. 8. Additional Uses: <ul><li>Project coordination </li></ul><ul><li>Informal work sessions </li></ul><ul><li>Alumni relations </li></ul><ul><li>Question and answer sessions </li></ul>
  9. 9. Videoconferencing <ul><li>Traditional videoconferencing was about audio-video communications to facilitate meetings without the burden of travel. </li></ul><ul><li>Visual collaboration is much more; it is the combination of audio and video and data in both real-time and store-and-forward applications. </li></ul><ul><li>It’s not just about meetings anymore. </li></ul>
  10. 10. Benefits of Videoconferencing <ul><li>Can improve work quality </li></ul><ul><li>Increase productivity </li></ul><ul><li>Reduce costs </li></ul><ul><li>Improves communication </li></ul><ul><li>Groups can meet more frequently </li></ul><ul><li>Critical meetings can be convened in less time </li></ul><ul><li>More faculty and staff can be involved </li></ul>
  11. 11. Benefits of Videoconference-based Learning <ul><li>Closely resembles traditional classroom-based education; permits learners to be active participants in the process </li></ul><ul><li>Faculty and staff needs can be met more quickly through just-in-time training </li></ul><ul><li>More faculty and staff can be trained faster without increasing training resources </li></ul><ul><li>Guest lecturers can be easily integrated into the course </li></ul>
  12. 12. Benefits of Videoconference-based Learning <ul><li>Enables any site to be the provider of the learning activities. </li></ul><ul><li>Videoconferencing is cost-effective, when you consider the traveling costs for traditional training. </li></ul><ul><li>Videoconference-based learning exploits the already acquired videoconferencing technologies and network infrastructure. </li></ul>
  13. 13. Limitations of Videoconferencing <ul><li>The initial cost of the equipment and leasing the lines to transmit conferences may be prohibitive. </li></ul><ul><li>Unless a strong effort is made by the instructor, students not located with the instructor may remain uninvolved in the course. </li></ul><ul><li>If visuals, like handwritten or copied materials, are not properly prepared, students may have a difficult time reading them. </li></ul>
  14. 14. Limitations of Videoconferencing <ul><li>If the “pipe” that carries the transmission among sites is not large enough, the students may observe “ghost images” when rapid movement occurs in “real time” </li></ul><ul><li>If the system is not properly configured, class members may observe an audio “echo” effect. The result is audio interference that detracts from the learning environment. </li></ul>
  15. 15. Limitations of Videoconferencing <ul><li>The absence of QOS (Quality of Service) provides virtually no guarantee of a satisfying and successful experience </li></ul><ul><li>Though the technology is improving, a successful videoconference is dependent upon the connections and technologies at all of the participating sites, AND the network infrastructure </li></ul><ul><li>Security issues </li></ul>
  16. 16. Start you work <ul><li>At the beginning of a videoconference make sure that participants introduce themselves. It is often helpful to have a sign in the background that gives your location. </li></ul><ul><li>Look directly at the camera as often as possible when speaking. </li></ul><ul><li>Wear neutral, solid colors. Avoid checks and stripes. Avoid white and shades of red. Red is not codec-friendly. Bright fluorescent objects also cause halo effects and other distracting artifacts. </li></ul>
  17. 17. Start your work <ul><li>Be natural, but try to minimize motion. </li></ul><ul><li>Try to arrange a simple, uncluttered, static background in neutral or darker solid colors. Do not sit in front of windows. Tilt pictures, framed degrees, awards or any other glass-covered wall hanging downward to eliminate reflection and glare. </li></ul>
  18. 18. Start your work <ul><li>Try to have direct light on the face of the person speaking. Too much light from behind causes silhouetting, too much from above causes shadows under the eyes. </li></ul><ul><li>Avoid placing videoconferencing equipment in rooms prone to echo effects or exposed to outside noise. Eliminate in-room sources of extraneous noise. On multipoint video conferences mute your location when not speaking. </li></ul>
  19. 19. Start your work <ul><li>Be aware of the transmission delay ... pause for others to comment. </li></ul><ul><li>When asking questions in a group conference, direct the question to a specific individual if possible. </li></ul><ul><li>Use a real or even a fake plant to humanize the setting. </li></ul>
  20. 20. Videoconference-based Learning Strategies <ul><li>Establish Class Expectations </li></ul><ul><ul><li>It ain’t MTV </li></ul></ul><ul><ul><li>At the begging of the session, prepare the preparing learners for an active experience </li></ul></ul><ul><li>Reduce Distractions </li></ul><ul><li>Engage Students with Variety and Interaction </li></ul><ul><li>Encourage Dialogue </li></ul>
  21. 21. Using videoconferencing in open university in uk http:// www.open.ac.uk / The course, &quot;You, Your Computer and the Net&quot; (OU code T171 (
  22. 22. <ul><li>In open university there courses are uploaded within the website using several types of delivery system including videoconferencing . </li></ul><ul><li>They use it for many reasons : </li></ul><ul><li>Deliver learning materials </li></ul><ul><li>Enhance discussions and communication </li></ul><ul><li>Provide learners with different resources of learning </li></ul><ul><li>Uploading messages from the university to their participants. </li></ul>
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