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Results tagged with dft
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user 4602
The Discrete Fourier Transform (DFT) is a mapping between a finite set of discrete points in a (primal) domain (time, space) and the dual frequency domain. DFT requires an input sequence which is discrete, such as a sampling from an analogue audio signal.
4
votes
1
answer
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Why is X(0) the DC component
Why exactly is X(0) the DC component of a signal?
How is it equal to N times x(n)'s average value and why it is at X(0)?
- 679
0
votes
2
answers
2k
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From time domain to frequency domain
I know the DFT is used, but what exactly is happening for it to be able to extract frequencies from amplitude values?
Is amplitude between -1 and 1 mapped from pressure levels? …
- 679