FPGA Design and Implementation of Real-time 2D-DWT in Space Image Compression System

WANG Ming-zhe; XUE Chang-bin; ZHANG Xue-quan

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FPGA Design and Implementation of Real-time 2D-DWT in Space Image Compression System

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- FPGA Design and Implementation of Real-time 2D-DWT in Space Image Compression System
- Vol. 34, Issue 7, Pages: 33-36(2017)
- 作者机构：
  
  1. 中国科学院大学机构,北京,101408
  2. 中国科学院机构国家空间科学中心,北京,100190
- 作者简介：
- 基金信息：
- DOI：
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- Published：2017
- 稿件说明：
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王鸣哲, 薛长斌, 张学全. 星载图像压缩系统中实时二维小波变换的FPGA设计与实现[J]. 微电子学与计算机, 2017, 34(7): 33-36, 41.

WANG Ming-zhe, XUE Chang-bin, ZHANG Xue-quan. FPGA Design and Implementation of Real-time 2D-DWT in Space Image Compression System[J]. 2017, 34(7): 33-36.
王鸣哲, 薛长斌, 张学全. 星载图像压缩系统中实时二维小波变换的FPGA设计与实现[J]. 微电子学与计算机, 2017, 34(7): 33-36, 41. DOI：

WANG Ming-zhe, XUE Chang-bin, ZHANG Xue-quan. FPGA Design and Implementation of Real-time 2D-DWT in Space Image Compression System[J]. 2017, 34(7): 33-36. DOI：

摘要

CCSDS空间图像压缩标准中采用了三级二维小波变换

此变换适合在可编程逻辑电路上实现.本文提出了一种能够满足实时处理要求的二维5/3小波变换的硬件架构.该架构利用了小波变换的局域性

采用流水线设计

实现了行变换与列变换的同时执行

并且在多级小波变换的架构中也采用了流水线设计.本文架构能够显著减少对图像的反复缓存所造成的时间延迟和片外RAM的使用量

提高了变换速率

并且充分利用了FPGA片内资源

降低片外RAM的使用需求.本文架构经验证能够为后续的数据编码和传输提供有利条件

可以满足对图像进行实时处理的速度要求.

Abstract

The standard recommended by CCSDS for space image compression includes a three-level two-dimensional discrete wavelet transform

which is suitable for design and implementation on logical circuit. In this article

a VLSI architecture of 5/3 2D-DWT is proposed

which can meet the demand of real-time processing. This structure adopts pipelined designing and uses the localization of wavelet to compute row and column transform in the same time. As for three-level discrete wavelet transform

this structure adopts pipelined designing either. This structure can reduce the memory usage and the delay of read and write

increase the speed of wavelet transform

make full use of logical resources of FPGA

and reduce the demand of external RAM. Experiment results show that this structure can meet the demand of real-time processing entirely

and provided favorable conditions for coding and transmission.

关键词

Keywords

references

CCSDS. Recommended standard for image data compression[S]. Washington DC, USA: CCSDS 122.0-B-1, 2005.

张旭东. 图像编码基础和小波压缩技术[M]. 北京: 清华大学出版社, 2004.

Chakrabarti C, Vishwanath M, Owens R M. Architectures for wavelet transforms: a survey[J]. Journal of VLSI Signal Processing Systems for Signal Image and Video Technology, 1996, 14(2): 171-192. DOI: 171

Weeks M, Bayoumi M. Discrete wavelet transform: architectures, design and performance issues[J]. Journal of VLSI Signal Processing Systems for Signal Image and Video Technology, 2003, 35(2): 155-178. DOI: 155

Skodras A, Christopoulos C, Ebrahimi T. The JPEG 2000 still image compression standard[J]. IEEE Signal Processing Magazine, 2010, 18(5): 36-58. DOI: 36

CCSDS. Report concerning image data compression, [R]. Washington DC, USA: CCSDS 120.1-G-1, 2007.

张学全, 陈晓敏. CCSDS中二维整数小波变换的FPGA实现方法[J]. 半导体光电, 2012, 33(5): 747-751. DOI: 747

任思颖. JPEG 2000中5/3离散小波多层变换FPGA实现研究[J]. 现代电子技术, 2011, 34(12): 75-82. DOI: 75

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