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Lecture 3: Sampling and Aliasing (67)
CeHao1

Basically, the sampling theorem is called 'Nyquist–Shannon sampling theorem'

More details can be found here:https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem

This can be explained that the sampling frequency will determine the frequency distance between two signals and if their maximum frequency 2 * f_max > f_sample, their figures will overlap in the frequency domain. So finally, we cannot inversely derive the temporal signal from the frequency domain. The high-frequency part will have overlap and resonance to cause periodical textures like jaggies.

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