基于小波包最优基的网络数据的压缩

摘要

将紧支撑集正交小波包变换运用到网络数据压缩中来。研究了直接影响网络数据压缩质量的几个因素---域值，小波函数，分解级数，小波包基。在此基础上，选取域值熵作为优选指标，给出了取得最优方案的快速搜索方法。实验表明，选用的压缩方法提高了网络数据的压缩效果。%We use a wavelet packet transformation in order to improve the efficiency of data compression. This paper discusses some key factors that affect the performance of data compression based on wavelet transformation, such as threshold,wavelet function,proper level of decomposition and the basis of wavelet packet. We select the threshold entropy as standard and get the efficient compression result.