# Translations:Prediction distance/18/en

It often is stated that gap deconvolution is a more generalized approach than spike deconvolution is. In fact, the opposite is often true. Let us explain. Some claim that the gap-deconvolution technique allows one to control the length of the desired output wavelet and hence to control the desired degree of resolution. In gap deconvolution, the desired output wavelet is the head of the wavelet. Thus, in gap deconvolution, the length of the desired output can be specified, but the shape cannot. Because often the head is not minimum phase, in such cases, gap deconvolution destroys the minimum-phase character of the seismic trace, and subsequent filtering operations, such as wavelet processing, are more difficult or even impossible to perform.