On the basis of linear phase and perfect reconstruction characteristics of M-channel LPPRFB
not only is the necessary and sufficient condition for choosing analysis filters’symmetry polarities and lengths found
but also the permissible combinations of analysis filters and the relation of analysis filters’lengths are derived. Consequently
a general method for choosing analysis filters’symmetry polarities and lengths of M-channel LPPRFB is proposed. The generality and availability of the method is verified by the strict derivations and the results of M-channel LPPRFB reported in the literature.