discrete Fourier transform

Computing Dictionary

discrete Fourier transform definition

(DFT) A Fourier transform, specialized to the case where the abscissas are integers.
The DFT is central to many kinds of signal processing, including the analysis and compression of video and sound information.
A common implementation of the DFT is the Fast Fourier Transform (FFT).
See also discrete cosine transform.
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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