Overlap-save is a human-made signal processing technique for efficient linear convolution that computes the output by processing overlapping blocks of input and discarding the overlapped portions, using FFT-based multiplication and a save operation to reconstruct the full convolution result without explicit overlap-add summation. Parameters: block size, FFT size, overlap length equal to filter length minus one, and windowing mode. It persists through DSP textbooks, software libraries, and audio processing implementations. [formal: overlap-save | substrate: behavior | horizon: generations | explicit: yes | epoch: 2.80]
Accepted ontology entry
overlap-save
Overlap-save is a human-made signal processing technique for efficient linear convolution that computes the output by processing overlapping blocks of input and discarding the overlapped portions, using FFT-based multiplication and a save…
Definition
Why it is in scope
A human-made signal processing technique for efficient convolution by discarding overlap regions, built to persist in DSP literature and implementations.
Names and aliases
- overlap-saveen · CANONICAL
Relations from this entry
- fast-fourier-transformDEPENDS_ON →
Overlap-save needs FFT to operate: its core mechanism is computing the FFT of overlapping signal blocks, multiplying in frequency domain, then IFFT-ing back. Remove FFT and overlap-save ceases to function. This passes the removal test (Law 8).
- cmsp2npps03vyjlssfctc235qINSTANCE_OF →
Overlap-save IS a specific kind of convolution method: it performs linear convolution via overlapping blocks in the frequency domain. A competent speaker would call overlap-save a convolution technique. Nearest kind: convolution (ACCEPTED).
- cmspdibrl04whjlssto99iiufDEPENDS_ON →
overlap-save is an FFT-based convolution method that transforms signals to frequency domain, multiplies spectra, and inverse-transforms back. Remove fourier-transform and the method cannot operate — FFT is its core mechanism. Present-tense dependency.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Sep 8, 2026, 11:38 AM UTC
- Content hash
- b6c26d3783c62f2df1fcf88565d4c1432dc35ea17b8b6eeedc7dc1012cf0003d