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3rd Annual Communication Networks and Services Research Conference (CNSR'05)
Wireless Video Graphics Array System Design
Halifax, N.S., Canada
May 16-May 18
ISBN: 0-7695-2333-1
Adam Sampson, Dalhousie University
Zhizhang (David) Chen, Dalhousie University
A novel system design to accommodate wireless computer video (WVGA) is presented. A simple, yet efficient variable threshold frame differencing scheme is developed in this paper that allows lossless computer video compression ratio?s up to 100%, depending on what occurs on the screen. Using this scheme, only the differences between frames are sent through the channel. The compressed video stream still requires a very high speed wireless link. A 360 Mbps wireless OFDM link is simulated to cover a distance of 6m in an indoor environment. The high bit rate comes at the expense of using 1/2 of the unlicensed band from 5.15 - 5.35 GHz (Lower UNII band) per user. There is a resulting user count of 2 per 6 meter cell. However, the data rate allows a user to play full screen video files. The scheme can be modified to accommodate a higher density network of users who spend a lot of time surfing the internet or word processing and who are not interested in viewing full screen video files all of the time.
Index Terms:
Wireless computer video, compression, decompression, dual-port ram, OFDM, Wireless Video Graphics Array
Citation:
Adam Sampson, Zhizhang (David) Chen, "Wireless Video Graphics Array System Design," cnsr, pp.163-166, 3rd Annual Communication Networks and Services Research Conference (CNSR'05), 2005
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