多级二维整数小波变换的FPGA 实现研究.doc

多级二维整数小波变换的FPGA实现研究*
谭会生
(湖南工业大学电气与信息工程学院, 株洲 412008)
摘要: 为了满足整数小波变换实时应用的需要, 研究了整数小波变换的FPGA实现问题。相对于DSP等传统实现方式, 用FPGA实现整数小波变换具有处理速度快, 可重新配置硬件, 易于修改移植等优点。论文首先描述了二维(5,3)整数小波变换的算法, 接着阐述了一种多级二维(5,3)整数小波变换的FPGA实现结构, 最后给出了硬件资源消耗、最大时钟频率和功能测试结果等FPGA实现结果。为了提高系统的处理速度, 降低系统的资源消耗, 本设计采用了参数可配置、共享一维小波变换单元等方法进行结构优化。实验结果证明了本设计结构的有效性, 逻辑功能的正确性, 修改移植方便, 具有良好的应用价值。
关键词: 图像无损压缩;多级整数小波变换;FPGA实现;共享硬件资源;参数可配置结构
中图分类号: TP391 文献标识码: A 国家标准学科分类代码:
FPGA implementation of multilevel two-dimension integer wavelet transform
Tan Huisheng
(School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412008, China)
Abstract: In order to meet the demand of real-time applications of integer wavelet transform (IWT), a FPGA implementation of IWT is researched. Comparing with classical implementation such as DSP etc, the FPGA implementation of IWT has the advantages such as higher processing speed, reconfigurable hardware, more easy to modify and transplant. First of all, this paper describes a two-dimensional (5,3) IWT algorithm, then proposes a FPGA implementation structure of a multilevel two-dimensional (5,3) IWT, and finally presents its experimental results such as hardware resource consumption, maximum clock frequency and function testing results. In order to improve the processing speed, and reduce the resource consumption, the proposed structure is optimized by