1. Data Representation
IGCSE Computer Science (0478)
  • Data Representation
    • Introduction
    • Why computers use binary (how binary represents data)
    • Number system
      • Introduction
      • Number Conversions
      • Addition of Binary Numbers
      • Logical binary shifts (positive 8-bit integers)
      • Two’s Complement (Signed: Positive and Negative Numbers)
      • Use of the Hexadecimal System
    • Text, Sound and Image
      • Text, Sound and Images
      • File Types
    • Data storage and File compression
      • Measurement of the Size of Computer Memories
      • Lossless and Lossy File Compression
  1. Data Representation

Text, Sound and Image

Text, Sound and Images
Understanding How Computers Store Text 1. The Basic Idea Computers only understand numbers! So every letter, number, and symbol needs a number code. ...
File Types
Musical Instrument Digital Interface (MIDI) MIDI is a communication protocol that lets electronic musical instruments talk to each other. It stores ...
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Use of the Hexadecimal System
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Text, Sound and Images
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