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Reference.org
Sliding DFT
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<p>In applied mathematics, the sliding discrete Fourier transform is a <a href="/facts/Recursive/CxSKxJoW">recursive</a> algorithm to compute successive STFTs of input data frames that are a single sample apart (hopsize − 1). The calculation for the sliding DFT is closely related to <a href="/facts/Goertzel_algorithm/QMrSIQjm">Goertzel algorithm</a>. </p>