A class of generalized cosine-modulated filter bank
Truong Q. Nguyen · 2003
It is well known that FIR (finite impulse response) filter banks which satisfy the perfect reconstruction (PR) property can be obtained by cosine modulation of a linear-phase prototype filter of length N=2mM, where M is the number of channels. Moreover, the overall delay of this system is (2mM-1) samples. The author presents a PR cosine-modulated filter bank in which its overall delay is (2( alpha +1)M-1) samples, where alpha is a positive integer in the range 0>