Computer ScienceCode 2210

Text, sound and images

What this topic asks you to be able to do

  • Understand why and how text is represented in a computer, and the part played by character sets, including Unicode and American standard code for information interchange (ASCII)
  • Understand why sound is represented in a computer and how this is done, including what difference sample rate and sample resolution make
  • Understand the method and purpose behind a computer's representation of an image, including how resolution and colour depth affect the outcome