关于空间数据系统无损压缩算法的零值块研究  

Research of zero block in lossless data compression algorithm for space data system

作　　者：徐志立[1] 苏依拉[2] 

机构地区：[1]北京青年政治学院网络中心,北京100102 [2]内蒙古工业大学计算机系,内蒙古呼和浩特010062

出　　处：《计算机工程与设计》2007年第14期3416-3418,共3页Computer Engineering and Design

摘　　要：通过对CCSDS(国际空间数据系统咨询委员会)建议的无损数据压缩标准的研究,以及对目前常用压缩算法的调查,它阐述了一种具有延迟小速度快抗差错能力强等特点的无损数据压缩算法,即Rice压缩算法,压缩率超过50%以上,而且对多种类型的数据都会达到满意的效果。它对算法中的零值块部分作了较为详细地阐述,因为经过预处理过的数据通常都很小,对于图像来说有相当多的零值。因此,对零值较多的情况下采取零值块压缩处理,效果很好,经过软件测试,结果符合CCSDS的要求标准。To the research of lossless data compression standard recommended by the CCSDS （consultative committee for space data system）, and by the research of common compression algorithm presently, one lossless data compression algorithm is described, which had the character of little delay, soon rapidity and strong anti-jamming etc, namely rice compression algorithm, compression rate exceeds 50 percent, and it has a better compression effecting to numerous data type. It detailedly the aspect of zero block compression in the algorithm, for the data which is processed by the preprocessing is very little, hasing very more zero data to the image, in the case of more zero data, using the zero block compression would have a better effecting, it has passed the software test, which is true of the standard requested by CCSDS.

关 键 词：无损压缩 预处理器 自适应熵编码器 零值块压缩 国际空间数据系统咨询委员会 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]