EFFICIENT CONVOLUTION WITHOUT INPUT-OUTPUT DELAY

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