An efficient approach to the calculation of the E-entropy is proposed. The
method is based on the idea of looking at the information content of a stri
ng nf data hv annalyzing the signal only nt thp instants when the fluctuati
ons are larger than a certain threshold is an element of, i.e., by looking
at the exit-time statistics. The practical and theoretical advantages of ou
r method with respect to the usual one are shown by the examples of a deter
ministic map and a self-affine stochastic process.