With the quick increase of network' s information, data compression is paid more and more attention by people. Data compression can be divided into two types, one is called lossless compression, and the other is called loss compression. It takes lossless data compression as main line. According to different compression technology of lossless data compression, from two aspects of statistic and dictionary ideas, it introduces some representative lossless data compression approaches and analyzes these kinds of data compression algorithms' advantages and disadvantages. Gather some mature betterment algorithm based on dictionary compression algorithm together and introduce them;It is facilitate reference for people who is interest in lossless data compression technology.%随着网络承载的信息量的飞速增长,数据压缩必然会备受人们重视.数据压缩可分成两种类型,一种叫做无损压缩,另一种叫做有损压缩.文中主要介绍目前用得最多和技术最成熟的无损数据压缩技术,按照无损压缩方法采用的压缩技术的不同,从基于统计的压缩思想和基于字典的压缩思想两个方面对其中最具有代表性的无损数据压缩方法进行了详细的分类讨论和优缺点比较,并对基于字典压缩算法的一些成熟的改进算法进行了汇总介绍,便于对无损数据压缩技术感兴趣的同志学习参考.
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