Video Conferencing


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  • Video Conferencing

    1. 1. Videoconferencing <ul><li>Rich Phelps </li></ul><ul><li>TSM602 Session One </li></ul>
    2. 2. What is Video Conferencing? <ul><li>A videoconference is a set of interactive telecommunications technologies which allow two or more locations to interact via two way audio and video transmissions simultaneously. </li></ul><ul><li>Will also see video conferencing referred to as visual collaboration and a type of groupware. </li></ul><ul><li>Groupware – is a technology that integrates work on a single project by multiple concurrent users. </li></ul>
    3. 3. Benefits to Video Conferencing <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>
    4. 4. Video Conference Components <ul><li>Camera - to capture and send video from your local endpoint. </li></ul><ul><li>Video Display - to display video received from remote endpoints. </li></ul><ul><li>Microphone - to capture and send audio from your local endpoint. </li></ul><ul><li>Speakers - to play audio received from remote endpoints. </li></ul><ul><li>Broadband Connectivity – to exchange data packets between stations. </li></ul>All Videoconferencing systems have key pieces that make up a system. The components required for a videoconference system include:
    5. 5. Primary Videoconference Equipment <ul><li>Polycom is the market leader in endpoint video and voice communication </li></ul><ul><li>We have standardized on Polycom </li></ul><ul><li>Conference room units UK uses – ViewStation VSX 6000 and VSX 5000 </li></ul><ul><li>Personnel units Deployed – Via Video, CMA Desktop, and Polycom V500 units. </li></ul>
    6. 6. Polycom VSX 60005000 Systems cost between $4000-$6000
    7. 7. Polycom Personnel Solutions These solutions run between $400 - $2000
    8. 8. Codec, Coder-Decoder <ul><li>Videoconference hardware codes the outgoing video and audio signals and decodes the incoming signals. </li></ul><ul><li>Prior to transmission, the codec converts analog signals to digital signals and compresses. Incoming audio and video must be decompressed and converted from digital back to analog. </li></ul><ul><li>Makes the audio/video data “small enough” to be practical for sending real time data over a network connection. </li></ul>
    9. 9. Real-time Transport Protocol <ul><li>Developed in 1996 by IETF </li></ul><ul><li>Adopted as a standard in 1998 </li></ul><ul><li>Transmits packets over UDP </li></ul><ul><li>Media Stream – Separate RTP connection </li></ul><ul><li>What RTP doesn’t guarantee </li></ul>
    10. 10. H.323 and H.264 <ul><li>H.323 – Video Compression standard that allows a wide variety of videoconferencing systems to communicate over TCP/IP networks. </li></ul><ul><li>H.264 – A refinement of H.323 standard that allows for high quality sound and picture with less bandwidth than H.323 standard. </li></ul>
    11. 11. Components to support H.323 and H.264 <ul><li>Terminals </li></ul><ul><li>Gateways </li></ul><ul><li>Gatekeepers </li></ul><ul><li>MCU – Multipoint Control Units </li></ul>
    12. 12. QoS – Quality of Service Why do we need it? <ul><li>QoS refers to the capability of a network to provide better service to selected network traffic. </li></ul><ul><li>Classification </li></ul><ul><li>Scheduling </li></ul><ul><li>Provisioning </li></ul>Larger Input I.E Fewer Outputs More Inputs