this post was submitted on 06 Jul 2024
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Science Memes

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Sub Sampling (mander.xyz)
submitted 4 months ago by [email protected] to c/[email protected]
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[โ€“] [email protected] 13 points 4 months ago (1 children)

The Nyquist theorem, in very simple terms, describes the minimum measurements you need to take to capture all the information in a signal. It turns out, if you have special information about what signal you expect to see, you can still figure it out using fewer measurements.

Generally speaking, it tells you how many measurements you need to take to capture the whole signal.

[โ€“] [email protected] 8 points 4 months ago

Or in terms of practical applications, it explains why CDs are "good enough" and audiophile stuff is very often bullshit.