In Example 9.12, we could attempt to generalize the orthogonal realization of the LOT by allowing the matrix L 1 of Figure 9.45 to be a full matrix and design a simple biorthogonal filter. Will this solve the problem at hand? Justify your answer.
Propose an alternative and simpler structure to that of Figure 9.46 in Example 9.12. The simplified structure should be based on Equation (9.267).
Design a linear-phase lapped biorthogonal transform with M = 6 sub-bands aiming
at minimizing the stopband ripple of the sub-filters.