Fig. 3
From: Significance-aware filtering for nonlinear acoustic echo cancellation
Example for partitioned block convolution using P = 2 blocks for partitioning the Impulse Response (IR) h(k): the summation during convolution is split into P = 2 partial sums of length M. Each partition of h(k) produces a sequence of M samples of its contribution to the convolutive product in an overlap-save manner in the DFT domain, where the block length is N = 2M. Summing up the second half of these partial results (free from cyclic convolution artifacts) yields a block of M output samples (see [22])