Images/Sound & Character Sets

• Colour depth


  The number of bits per pixel used to represent the colour of a single pixel in a digital image
• More bits per pixel


  More colours will be represented
• More bits per pixel

  Takes up more space
• Sample rate


  The number of samples recorded in a given period of time (seconds)
• Higher sample rate


  Better the quality of the sound
• Bit depth


  The number of bits used to record the sound
• More bits used to record

  More variety of sound and better quality
• Character set


  All the characters that a computer can use, stored as binary numbers
• Computers work in binary
• Resolution


  The number of pixels per inch (DPI)
• More pixels


  Better the quality of the image
• Image size


  The number of pixels that an image contains, expressed as height vs width