Dale - Computer Science Illuminated 79

Dale - Computer Science Illuminated 79 - 52 Chapter 3 Data...

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Multimedia Several different media types Data compression Reducing the amount of space needed to store a piece of data Bandwidth The number of bits or bytes that can be transmitted from one place to another in a fixed amount of time 52 Chapter 3 Data Representation Goals After studying this chapter, you should be able to: ± distinguish between analog and digital information. ± explain data compression and calculate compression ratios. ± explain the binary formats for negative and floating-point values. ± describe the characteristics of the ASCII and Unicode character sets. ± perform various types of text compression. ± explain the nature of sound and its representation. ± explain how RGB values define a color. ± distinguish between raster and vector graphics. ± explain temporal and spatial video compression. 3.1 Data and Computers Without data, computers would be useless. Every task a computer under- takes deals with managing data in some way. Therefore, our need to repre- sent and organize that data in appropriate ways is paramount.
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