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さんへんかん 離散変換
Noun
1. discrete Fourier Transform; DFTMathematics
Wikipedia definition
2. Discrete Fourier transformIn mathematics, the discrete Fourier transform (DFT) is a specific kind of discrete transform, used in Fourier analysis. It transforms one function into another, which is called the frequency domain representation, or simply the DFT, of the original function (which is often a function in the time domain). The DFT requires an input function that is discrete. Such inputs are often created by sampling a continuous function, such as a person's voice.
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