87.1 Digital Filter Specifications As the impulse response corresponding to each of these ideal filters is noncausal and of infinite length, these filters are not realizable ●· In practice, the magnitude response specifications of a digital filter in the passband and in the stopband are given with some acceptable tolerances In addition a transition band is specified between the passband and stopband§7.1 Digital Filter Specifications • As the impulse response corresponding to each of these ideal filters is noncausal and of infinite length, these filters are not realizable • In practice, the magnitude response specifications of a digital filter in the passband and in the stopband are given with some acceptable tolerances • In addition, a transition band is specified between the passband and stopband