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Seminar - An Overview of Communications Technologies


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Module 12 - Enterprise/SOHO Communications Needs and Solutions                                           Slide 17 of 30                                                                                                    ________________

                               Applications and Bandwidth Requirements

Applications Analogue or Digital Bandwidth
TV Channel Analogue 6.0 M Hz
NTSC Video Channel Analogue 4.95 M Hz
C-band Satellite Transponder Analogue 24 M Hz
CD (single speed) Digital 150 K bytes/sec
CDx2 (double speed) Digital 300 K bytes/sec
Video Telephony Digital 56 - 128 K bps
Video Conferencing Digital 256 K bps - 1.5 M bps
Video Compressed  
     - Low Quality

     - Medium Quality

     - High Quality		 Digital 100 K to 1.5 M bps
Digital 1.5 M - 6 M bps
Digital 6 M - 24 M bps

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Bandwidth requirement varies with the application. Bandwidth requirement can be minimized by using compression technologies (in digital format) by compromising with the QOS.