学习目标

After studying this chapter, you should be able to :

• distinguish between analog and digital data.

• explain data compressio ad calculate compression ratios.

• explain the binary formats for negative and floating-point values.

• describe the charateristics of the ASCII and UNICODE character sets.

• perform various types of text compression.

• explain how RGB values define a color

• distinguish between raster and vectir graphics.

• explain temporal and spatial video compression