| 内存受限系统下的VxWorks映像压缩算法 |
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| 引用本文： | 黄海宇,姜连祥,杨勤荣,李华旺.内存受限系统下的VxWorks映像压缩算法[J].计算机测量与控制,2010,18(2). |
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| 作者姓名： | 黄海宇 姜连祥 杨勤荣 李华旺 |
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| 作者单位： | 1. 中国科学院上海微系统与信息技术研究所,上海,200050;中国科学院研究生院,北京,100039
2. 中国科学院上海微系统与信息技术研究所,上海,200050 |
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| 摘 要： | 针对VxWorks自带压缩算法在内存受限系统下的缺陷,提出一种基于Huffman编码的VxWorks映像压缩算法;该算法利用VxWorks映像文件的格式,结合处理器指令集的特点,通过分段和分字节两种策略对VxWorks映像文件进行压缩;以SPARC V7指令集为例,对该算法测试压缩性能,实验结果表明,使用分段和分字节策略后的Huffman压缩率为67.6%,略高于VxWorks自带压缩算法,但占用内存仅为1.5kB,为VxWorks自带压缩算法的1/10。
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| 关 键 词： | VxWorks Huffman编码 代码压缩 |
Compression Algorithm for VxWorks Image in Memory Limited System |
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| Huang Haiyu,Jiang Lianxiang,Yang Qinrong,Li Huawang.Compression Algorithm for VxWorks Image in Memory Limited System[J].Computer Measurement & Control,2010,18(2). |
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| Authors: | Huang Haiyu Jiang Lianxiang Yang Qinrong Li Huawang |
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| Affiliation: | 1.Shanghai Institute of Micro-system and Information technology/a>;Chinese Academy of Sciences/a>;Shanghai 200050/a>;2.Graduate School/a>;Beijing 100039/a>;China |
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| Abstract: | A compression algorithm for vxWorks image based on Huffman coding was proposed to overcome the shortage of the vxWorks'compression algorithm.The algorithm utilized the format of vxWorks image and instruction set of processor to compress the image by section separation and byte separation.According to the experiments on SPARC V7 instruction set,the compression rate of the algorithm was about 67.6% which was slightly higher than the rate of original algorithm,however,the memory requirement of new algorithm is... |
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| Keywords: | vxWorks Huffman coding code compression |
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