A block FFT implementation of convolution is vastly more efficient than the direct-form FIR filter. Unfortunately block processin incurs significant input-output delay, which is undesirable for real-time applications. A hybrid convolution method is proposed, which combines direct-form and block FFT processing. The result is a zero-delay convolver that performs significantly better than direct-form methods.

Author: Gardner, William G.
Affiliation: Perceptual Computing Section, MIT Media Lab, Cambridge, MA
JAES Volume 43 Issue 3 pp. 127-136; March 1995
Publication Date: March 1, 1995 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=7957

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