Abstract
The design of modulated filter bank with nonuniform frequency allocations is considered. The nonuniform subband filters are formed by merging the subband filters of an uniform modulated filter bank. This simple merge preserved the spectral properties and the structure of the uniform modulated filter bank in the resulting nonuniform filter bank. The merge of subband filters of paraunitary modulated filter bank preserve the perfect reconstruction property. As a result, this seemingly idea gives rise to a simple design method for a large class of nonuniform modulate filter banks that are perfectly reconstruct. Design example of a nonuniform cosine modulated filter bank is derived. The performance of nonuniform cosine modulated filter bank under the presented framework is discussed.
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