We study a class of endomorphisms on the space of bi-infinite sequences over a finite set, and show that such a map is onto if and only if it is measure-preserving. A class of dynamical systems arising from these endomorphisms are strongly mixing, and some of them even m-mixing. Some of these are isomorphic to the one-sided shift on Zn in both the topological and measure-theoretical sense. Such dynamical systems can be associated to On, the Cuntz-algebra of order n, in a natural way.