What do you mean by aliasing in digital signal processing? How it can be avoided? | DSP LAB VIVA QUESTIONS

Aliasing refers to an effect due to which different signals become indistinguishable. It also refers to distortion in the reconstructed signal when it is reconstructed from the original continuous signal.
To avoid aliasing we can simply filter out the high freuency components of the signal by using antialiasing filter like optical antialiasing filter.

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