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An Efficient 2D Discrete Wavelet Transform Filter Design Using Lattice Structure  

Park, Tae-Geun (카톨릭대학교 컴퓨터전자공학부)
Jeong, Seon-Gyeong (카톨릭대학교 컴퓨터전자공학부)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.39, no.6, 2002 , pp. 59-68 More about this Journal
Abstract
In this paper, we design the two-dimensional Discrete Wavelet Transform (2D DWT) filter that is widely used in various applications such as image compression because it has no blocking effects and relatively high compression rate. The filter that we used here is two-channel four-taps QMF(Quadrature Mirror Filter) Lattice filter with PR (Perfect Reconstruction) property. The proposed DWT architecture, with two consecutive inputs shows an efficient performance with a minimum of such hardware resources as multipliers, adders, and registers due to a simple scheduling. The proposed architecture was verified by the RTL simulation, and utilizes the hardware 100%. Our architecture shows a relatively high performance with a minimum hardware when compared with other approaches. An efficient memory mapping and address generation techniques are introduced and the fixed-point arithmetic analysis for minimizing the PSNR degradation due to quantization is discussed.
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