JPEG2000编码算法中上下文关系的改进  

IMPROVEMENT OF THE CONTEXT IN JPEG2000

作　　者：孙亚明[1] 杨春玲[1] 

机构地区：[1]华南理工大学电信学院,广东广州510640

出　　处：《计算机应用与软件》2005年第12期110-111,144,共3页Computer Applications and Software

摘　　要：通过研究SPIHT和EBCOT(JPEG2000核心算法)编码算法,分析它们所用的小波系数的不同性质,本文提出了把SPIHT算法用到的小波系数父子关系特性也用在EBCOT编码中的思想,并提出一种上下文关系的改进方法。在JPEG2000框架下对改进算法进行了仿真实验。理论分析和实验结果显示,改进的上下文关系优于JPEG2000中采用的上下文关系。By reseaching SPIHT and EBCOT（the core of JPEG2000）, analyzing the different wavelet coefficients features they used, it is proposed in this paper that the relationship between father and children which is better used in SPIHT can be used into EBCOT, and an improved method of the context in JPEG2000 is given. Experimental simulation is implemented by modifying JPEG2000 programme. The simulation results and theoretical analysis show that the improved context is better than that used in JPEG2000.

关 键 词：JPEG2000 最优截断嵌入式块编码(EBCOT) 等级树集分割编码算法(SPIHT) 上下文关系 

分 类 号：TN919.81[电子电信—通信与信息系统]