Performance Analysis of Qmf Filters Obtained by the Inverse Block Wavelet Transform

In this work, coding performances are analyzed for filter banks obtained from inversion of Block Wavelet Transforms (BWT) that match to specific Karhunen–Loeve Transforms (KLT). BWTs are orthogonal matrix transforms that can be obtained from orthogonal subband filter banks. Although the construction methodology of BWT is clear, the reverse operation was not researched. Here, the filters of the decomposition are obtained by matching the parameterized filter coefficients to the corresponding KLT matrix terms. Specific performance examples are presented.