Modulated, perfect reconstruction filterbanks with integer coefficients

摘要: We present design methods for perfect reconstruction (PR) integer-modulated filterbanks, including biorthogonal (low-delay) filterbanks. Both the prototype filter and modulation sequences are composed of integers, thus allowing efficient hardware implementations fast computation. To derive such we first start with PR conditions known cosine extend them to more general, integer schemes. For prototypes, a lifting strategy is introduced. find suitable schemes, new algebraic presented. show solutions where on filters matrices entirely decoupled some simple coupling even odd numbers channels considered. Design examples presented both cases.