A Simplified Lattice Structure of Two Dimensional Generalized Lapped Orthogonal Transform

Taichi YOSHIDA  Seisuke KYOCHI  Masaaki IKEHARA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E94-A    No.2    pp.671-679
Publication Date: 2011/02/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E94.A.671
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Digital Signal Processing
two dimensional nonseparable filter banks,  paraunitary,  linear-phase,  

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In this paper, we propose a novel lattice structure of two dimensional (2D) nonseparable linear-phase paraunitary filter banks (LPPUFBs) called 2D GenLOT. Muramatsu et al. have previously proposed a lattice structure of 2D nonseparable LPPUFBs which have efficient frequency response. However, the proposed structure requires less number of design parameters and computational costs than the conventional one. Through some design examples and simulation results, we show that both filter banks have comparable frequency response and coding gain.