Titlebook: Mastering Global Information Systems; William Buchanan Textbook 1997Latest edition Macmillan Publishers Limited 1997 computer.control.info

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Data Compression,n systems have a limited data rate and data storage is restricted. For example an uncompressed digitized video stored on CD-ROM would only last 30 seconds (approximately 648 MB of data). Data compression normally involves analysing the source of the information and determining if there is redundant data in it

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Integrated Services Digital Network (ISDN),ed data tends to create a constant traffic flow whereas computer-type data has bursts of traffic. Sampled data normally also needs to be delivered within a given time but computer-type data needs reliable paths where delays are relatively unimportant.

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Digital Information,n a digital format, but analogue signals, such as speech and video, require to be sampled at fixed intervals and then converted to a digital form. This process is known as digitization. The advantages of converting analogue information into digital are that:

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The World Wide Web,nsmit data around the world. These servers run special programs which allow information to be transmitted to remote computers which are running a Web browser, as illustrated in Figure 4.1. The Internet is a common connection in which computers can communicate using a common addressing mechanism (TCP

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