| 适于PCT编码的低内存通用树状多带滤波器组实现 |
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| 引用本文： | 张雄明,卢焕章,成礼智.适于PCT编码的低内存通用树状多带滤波器组实现[J].国防科技大学学报,2008,30(3):59-64. |
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| 作者姓名： | 张雄明 卢焕章 成礼智 |
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| 作者单位： | 1. 国防科技大学,ATR实验室,湖南,长沙,410073
2. 国防科技大学,理学院,湖南,长沙,410073 |
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| 基金项目： | 国家自然科学基金
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国家高技术研究发展计划(863计划) |
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| 摘 要： | 基于常用的多带滤波器组的紧支撑性及FIFO(First-in First-out)缓存技术提出了一种具有低内存需求的通用树状多带滤波器组(Tree-structured Filter Bank,TSrS)的实现方法SBFB.该方法具有两大特点:(1)生成与全局变换法相同的子带系数,但是内存需求大大减小且仅与图像宽度及采用的TSFB相关;(2)在FIFO缓存中直接生成父子树(Parent-children Tree,PCT).基于PCT的编码器可直接对位于缓存中的PCT进行编码,而无须在SBFB与编码器之间引入中间缓存.通过分析TSFB的各分解层中的数据流,给出了样本点与子带系数之间的时序关系,并且使用该关系从数学上严格证明了SBFB的正确性.
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| 关 键 词： | 树状多带滤波器组 低内存实现 父子树结构 |
| 收稿时间： | 2007/12/1 0:00:00 |
Low-memory Implementation of Generic Tree-structured Filter Banks for PCT-based Image Coders |
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| ZHANG Xiongming,LU Huanzhang and CHENG Lizhi.Low-memory Implementation of Generic Tree-structured Filter Banks for PCT-based Image Coders[J].Journal of National University of Defense Technology,2008,30(3):59-64. |
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| Authors: | ZHANG Xiongming LU Huanzhang and CHENG Lizhi |
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| Institution: | ZHANG Xiong-ming1,LU Huan-zhang1,CHENG Li-zhi2(1.ATR Lab,National Univ.of Defense Technology,Changsha 410073,China,2.College of Science,China) |
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| Abstract: | Based on the compact support property of popular multi-channel filter banks,a low-memory implementation of generic tree-structured filter banks(TSFBs),called the stripe-based tree-structured filter bank (SBFB),is presented by utilizing the first-in first-out(FIFO) buffer technique.The SBFB has two advantages:(1) It produces exactly the same sub-band coefficients as the conventional global implementation of TSFB does,while the memory budget is unrelated to the image height and only dependent on the image wid... |
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| Keywords: | tree-structured filter bank low memory implementation parent-children tree |
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