Text, Sound and Images

• ASCII stands for American Standard Code for Information Interchange
• Why chose unicode over ASCII?

  It allows for a greater range of characters and symbols than ASCII, including different languages and emojis
• Whats one down side of Unicode?

  It requires more bits per character than ASCII
• Explain sampling

  Taking measurements of the sound wave at regular intervals and converting these measurements into binary data
• What does the quality of the digital sound depend on?

  The sample rate
• What other factor affects the quality of the digital sound?

  The sample resolution
• Sample resolution

  The number of bits per sample
• What does the sample resolution determine?

  The level of detail and accuracy of each sample
• What does a higher sample resolution result in?

  A more accurate representation of the sound wave, but also increases the file size of the digital sound
• What is a bitmap image made up of?

  A series of pixels
• Resolution

  The number of pixels in the image
• What does a higher resolution image mean?

  More pixels, sharper, more detailed, and requires more storage space.
• Colour depth

  Number of bits used to represent each colour.
• What does a higher colour depth mean?

  More colours can be represented, resulting in a more realistic image but requires more storage space