l_p approximation of the group delay response of one- and two-dimensional filters
G. Maria, Moustafa M. Fahmy · IEEE Transactions on Circuits and Systems · 1974
An algorithm is developed to design all-pass filters that best approximate in thel_{p}, sense a prescribed group delay response. This algorithm can be used for both the cases of one- and two-dimensional filters. To illustrate the method, several examples for designing one- and two-dimensional filters are solved.