Unit 1

HideShow resource information
View mindmap
  • Unit 1
    • Bit
      • Binary digit
      • 0 or 1
    • Byte
      • A group of 8 bits
      • 01010101
    • Digital data
      • Can be represented by discrete bit patterns, can only take a finite number of definite fixed values
        • e.g. number of people in a room, sweets in a tin etc.
      • Digital to analogue converter (DAC)
        • A device for converting digital signals from the computer into analogue data
    • Analogue data
      • A continuous varying signal, represented using an infinite scale of values
        • e.g. sound
      • Key characteristic
        • If you have any two values, there is always a value between
      • To be stored and manipulated into a computer it must be converted to a digital representation
        • The height of the waveforms can be sampled at regular time intervals and is represented by a binary code in order to digitise the data
        • Analogue to digital converter (ADC or Digitiser)
          • A device which converts analogue signals into digital ones for subsequent computer processing
      • The height of the waveforms can be sampled at regular time intervals and is represented by a binary code in order to digitise the data

Comments

No comments have yet been made

Similar Computing resources:

See all Computing resources »See all The computational process using digital data resources »