Discrete lattice wavelet transform

被引：10
作者：
Olkkonen, Juuso T. [1 ]
Olkkonen, Hannu
机构：
[1] VTT Tech Res Ctr Finland, SF-90571 Oulu, Finland
[2] Univ Kuopio, Dept Appl Phys, FIN-70211 Kuopio, Finland
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2007年 / 54卷 / 01期
关键词：
finite-impulse response (FIR) filters; lattice filters; quadrature mirror filters (QMFs); wavelet transform;
D O I：
10.1109/TCSII.2006.883097
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The discrete wavelet transform (DWT) has gained a wide acceptance in denoising and compression coding of images and signals. In this work we introduce a discrete lattice wavelet transform (DLWT). In the analysis part, the lattice structure contains two parallel transmission channels, which exchange information via two crossed lattice filters. For the synthesis part we show that the similar lattice structure yields a perfect reconstruction (PR) property. The PR condition can be used to design half-band filters, which effectively eliminate aliasing in decimated tree structured wavelet transform. The DLWT can be implemented directly to any of the existing DWT algorithms.
引用
收藏
页码：71 / 75
页数：5
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