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Objectives After studying this chapter, the student should be able to: � List five different data types used in a computer. � Describe how different data is stored inside a computer. � Describe how integers are stored in a computer. � Describe how reals are stored in a computer. � Describe how text is stored in a computer using one of the various encoding systems. � Describe how audio is stored in a computer using sampling, quantization and encoding. � Describe how images are stored in a computer using raster and vector graphics schemes. � Describe how video is stored in a computer as a representation of images changing in time. 3.2
3.3 3-1 INTRODUCTION Different forms including numbers, text, audio, image and video (Figure 3.1). i Figure 3.1 Different types of data The computer industry uses the term “multimedia” to define information that contains numbers, text, images, audio and video.
Page 1: 3.1 3 Data Storage Foundations of C
Page 5 and 6: 3.5 Figure 3.3 Storage of different
Page 7 and 8: Error detection and correction Anot
Page 9 and 10: 8 = 00001000 -8 11110111 11111000 P
Page 11 and 12: 3.11 i Figure 3.4 Fixed point repre
Page 13 and 14: Example 3.1 Store 7 in an 8-bit mem
Page 15 and 16: Example 3.3 What is returned from a
Page 17 and 18: Sign-and-magnitude representation I
Page 19 and 20: Example 3.5 Store −28 in an 8-bit
Page 21 and 22: Example 3.7 Retrieve the integer th
Page 23 and 24: Two’s complement representation A
Page 25 and 26: One’s Complementing The first is
Page 27 and 28: Two’s Complementing The second op
Page 29 and 30: Example 3.12 Store the integer 28 i
Page 31 and 32: Example 3.14 Retrieve the integer t
Page 33 and 34: 3.33 i There is only one zero in tw
Page 35 and 36: Storing reals A real is a number wi
Page 37 and 38: Floating-point representation The s
Page 39 and 40: Example 3.19 Show the number 3.39
Page 41 and 42: Example 3.21 Show the number 3.41
Page 43 and 44: 3.43 i Note that the point and the
Page 45 and 46: Example 3.22 We can express sixteen
Page 47 and 48: IEEE Specifications 3.47
Page 49 and 50: Example 3.24 Show the Excess_127 (s
Page 51 and 52: Example 3.26 The bit pattern (11001
Page 53 and 54:
We can represent each symbol with a
Page 55 and 56:
Codes 3.56 � ASCII � Unicode
Page 57 and 58:
3.58 Figure 3.15 An audio signal
Page 59 and 60:
Quantization The value measured for
Page 61 and 62:
Standards for sound encoding Today
Page 63 and 64:
Resolution We need to decide how ma
Page 65 and 66:
Indexed color The indexed color—o
Page 67 and 68:
Standards for image encoding Severa
Page 69:
3.70 3-6 STORING VIDEO Video is a r
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