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A Design Method of Odd-Channel Linear-Phase Paraunitary Filter Banks with a Lattice Structure
Shogo MURAMATSU Hitoshi KIYA
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/05/25
Print ISSN: 0916-8508
Type of Manuscript: Category: Digital Signal Processing
multirate filter banks, paraunitary system, linear-phase filter, subband image coding, non-linear optimization,
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In this letter, a design method of linear-phase paraunitary filter banks is proposed for an odd number of channels. In the proposed method, a non-linear unconstrained optimization process is assumed to be applied to a lattice structure which makes the starting guess of design parameters simple. In order to avoid insignificant local minimum solutions, a recursive initialization procedure is proposed. The significance of our proposed method is verified by some design examples.