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This chapter is from the book

What You Should Remember

The concepts you should remember from this chapter are:

  • We experience signals throughout our daily lives, usually in the form of analog sound and light signals.
  • There is a way to convert analog signals, such as sound or light signals, into digital signals (sequences of numbers) that are stored in an electronic device. The digital signals contain all the information of the original analog signals.
  • The numbers in a digital signal can be mathematically modified to improve some important characteristic of the signal, or reduce unwanted noise that contaminates it.
  • The processed (modified and improved) digital signal can be converted back into an analog signal if necessary.
  • The applications of DSP are many and varied. We may not always see where this phantom technology of DSP is used, but our lives would be very different without it.
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