# Translations:Model-driven predictive deconvolution/23/en

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Let us summarize. A spike-deconvolution filter is the special case of a gap-deconvolution filter with the gap equal to one time unit. It often is stated that gap deconvolution with gap shortens an input wavelet of arbitrary length to an output wavelet of length (or less). Because an arbitrary value of can be chosen, it follows that resolution or wavelet contraction can be controlled by use of gap deconvolution. In general, this characterization of gap deconvolution is true for arbitrary if and only if the wavelet is a minimum-delay wavelet (i.e., minimum phase).