@article{(Open Science Index):https://publications.waset.org/pdf/9998911, title = {Optimal Design of Two-Channel Recursive Parallelogram Quadrature Mirror Filter Banks }, author = {Ju-Hong Lee and Yi-Lin Shieh}, country = {}, institution = {}, abstract = {This paper deals with the optimal design of two-channel recursive parallelogram quadrature mirror filter (PQMF) banks. The analysis and synthesis filters of the PQMF bank are composed of two-dimensional (2-D) recursive digital all-pass filters (DAFs) with nonsymmetric half-plane (NSHP) support region. The design problem can be facilitated by using the 2-D doubly complementary half-band (DC-HB) property possessed by the analysis and synthesis filters. For finding the coefficients of the 2-D recursive NSHP DAFs, we appropriately formulate the design problem to result in an optimization problem that can be solved by using a weighted least-squares (WLS) algorithm in the minimax (L∞) optimal sense. The designed 2-D recursive PQMF bank achieves perfect magnitude response and possesses satisfactory phase response without requiring extra phase equalizer. Simulation results are also provided for illustration and comparison. }, journal = {International Journal of Computer and Information Engineering}, volume = {8}, number = {7}, year = {2014}, pages = {1224 - 1230}, ee = {https://publications.waset.org/pdf/9998911}, url = {https://publications.waset.org/vol/91}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 91, 2014}, }