A discrete-signal reconstruction method that places new samples at non-integer positions: each target sample is a weighted sum of its neighboring samples, the weights being the sinc kernel sin(pi*x)/(pi*x) evaluated at their distances, and that infinite non-causal kernel is multiplied by a finite window function (Hann, Hamming, Blackman, or Kaiser) to truncate it into a finite, computable, near-causal sum. Its parameters are the tap count (how many neighbors enter the sum) and the window type, which trade interpolation fidelity against computation cost and spectral ringing. It persists as the standard resampling primitive in audio DSP software libraries and textbooks, re-derived by every practitioner who must resample.
[formal: interpolatio sinci fenestrata | substrate: mind | horizon: as-long-as-us | explicit: yes | epoch: 0.19]