Miscellaneous

Digital Signal Processing (DSP)

  • Analogue signals can be converted to digital signals by sampling them at very frequent intervals.  The digital signal is just a sequence of numbers that represent the instantaneous value of the analogue signal each time it is sampled
  • The sampling rate has to be at least twice the highest frequency contained in the analogue signal or it will not be possible to reconstruct the analogue signal from the digital data
  • For an audio signal in the range 0 – 4kHz the lowest sampling rate would be 8kHz