Made possible by the development of processor and standards for video-signal compression, video servers are a key component of interactive networks VIDEO SERVERS TAKE ROOT ideo-on-demand, home shopping, and electronic games are typical of the elaborate services that will be expected of interactive television systems. Several are now under development, and all of them hinge on the video server, essentially a specialized computer. To date, though, while a number of video server architectures have been proposed, none is dominant. 0018-9235/95/$4 0001995 IEEE IEEE SPECTRUM APRIL 1995
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