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Efficient Convolution without Input-Output Delay

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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.

JAES Volume 43 Issue 3 pp. 127-136; March 1995
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