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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 processing 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.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=6335

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