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Video and Text Conferencing

Video and Text Conferencing. By Isaac Roybal and Pancho Garcia. Video and Text Conferencing. What is Video and Text conferencing and how it works How does it work-An in-depth look Why and Where it is used How it affects your network. What is Video and Text Conferencing ?.

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Video and Text Conferencing

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  1. Video and Text Conferencing By Isaac Roybal and Pancho Garcia

  2. Video and Text Conferencing • What is Video and Text conferencing and how it works • How does it work-An in-depth look • Why and Where it is used • How it affects your network

  3. What is Video and Text Conferencing ? • Video conferencing- Communication of video, audio, and alphanumeric text in a real time environment. • Uses hardware and certain types software to relay the data over a network. • Microsoft NetMeeting, ICQ, Cu See ME, and Web phone- Examples of standard video and/or text conferencing software that may be download over the Internet. • Corporations have own conferencing software developed witch can be very expensive.

  4. How it works An in-depth look • The three basic ingredients needed- Input, Output, and Processor • Where it stands on the OSI model • It’s requirements and standards • What types of technology it uses

  5. Input, Output, and Process • Input- Usually the camera, microphone, and keyboard • Out put- Monitor and Speakers • Process- Software package and CODEC(coder/decoder). The CODEC is used for video digitization

  6. OSI model and Video/Text conferencing • Video and Text would fall in levels 3 and 4 on the OSI Model. • Level 3 would be in use because IP’s are used to make the connection between the PC’s, being point-to-point or client/server. • Level 4 would be in use because a Host-to-Host connection is made and also uses TCP.

  7. Requirements and Standards • Video uses frames/second to deliver the video data to be shown. • A frame is defined as the number of rows and columns of pixels • Required bandwidth for basic 30 frame/second video conferencing is usually about 80.64 Mb/s or two T-3 lines • H.261 standard-resolves video resolution formats, such as CIF(352x288) and QCIF(176X144) Needs less bandwidth. • MUX’s, MCU’s, and CSU/DSU- Multiplexers, Multipoint control units( Video router) , and CSU/DSU’s used in WAN Video Confrening. • H.243 standard deals with the interface between the MCU’s and the CSU/DSU

  8. What technologies are being used? • Video Compression-most important part of Video Conferencing to save bandwidth. Turns the need for two T-3 lines to the minimum of a dedicated 56k line. • Video Compression-Interframe coding and Motion compensation. Interframe coding just changes parts of the frame that change, cuts down of over head. • Multicast vs. Unicast- This is the way data is transported. Multicast is the transportation of data all at once to several different users, where unicast is only the on user at a time.

  9. Why and Where is Video Conferencing used? • Video conferencing is used to bring people together whether it be business, personal, or educational

  10. How Does all this affect a Network? • Bandwidth, Bandwidth, Bandwidth- Video and Audio requires a steady and constant bandwidth. • This can affect you two ways-One Network efficacy or Two cost of new leased lines and equipment.

  11. Conclusion • Video conferencing can be very strenuous and high in cost on your network. • So weight the Pros and Cons very carefully to see if it is right for your network.

  12. Thank You!

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