Zero-delay convolution usually follows a hybrid approach with convolution processing steps in both the time and the frequency domain [Gardner, J. Audio Eng. Soc., vol. 43, 127-136 (1995 Mar.)]. Implementations are likely to ask for dynamic coding, and related workload estimations are focused on efficiency and are limited to the hybrid approach. This paper considers simpler implementations of segmented convolution that work in the frequency domain only and that achieve acceptable low delay for real-time applications when processing several seconds of impulse-response in FIR mode. Workload and memory demand are estimated for this approach in the context of likely application parameters.
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