This is a very infuential video. I often see it referenced when digital audio gets explained.
It is also very insiduously misleading in a way that is hard to fault it for.
That "band limited signal" that uniquely satisfies Niquist theorem? That is an infinite, periodic signal.
No finite (e. g. a song), aperiodic signal can be band limited. That includes any signal with transients.
Well, how big is the difference? How much overhead/error/lookahead is needed to approach the Niquist result? It is never mentioned by people referring to this theorem when talking about audio signal sampling!
And I wish it was mentioned and explained.
A classic. I wish Xiph developed Daala into a fully functional video codec.
This is a very infuential video. I often see it referenced when digital audio gets explained.
It is also very insiduously misleading in a way that is hard to fault it for.
That "band limited signal" that uniquely satisfies Niquist theorem? That is an infinite, periodic signal.
No finite (e. g. a song), aperiodic signal can be band limited. That includes any signal with transients.
Well, how big is the difference? How much overhead/error/lookahead is needed to approach the Niquist result? It is never mentioned by people referring to this theorem when talking about audio signal sampling!
And I wish it was mentioned and explained.
A classic. I wish Xiph developed Daala into a fully functional video codec.