Recent Trends in the Design of Biorthogonal Modulated Filter Banks

Biorthogonal modulated lter banks when compared to paraunitary ones provide the advantage that the overall system delay can be chosen independently of the lter length thus resulting in low delay lter banks They have recently been studied by several authors In the paper we connect di erent design methods quadratic constrained least squares optimization cascade of sparse self inverse matrices and describe advan tages of the a factorization into Zero Delay and Maximum Delay matrices structure inherent perfect reconstruction no DC leakage of the lter bank low implementation cost