基于位长四叉树的EZBC改进算法  

An improved EZBC algorithm based on bit-length quadtree

作　　者：王仁龙[1] 阮双琛[1] 刘承香[1] 陈俊伟[2] 

机构地区：[1]深圳市激光工程重点实验室深圳大学电子科学与技术学院先进光学精密制造技术广东普通高校重点实验室,深圳518060 [2]深圳大学机电与控制工程学院,深圳518060

出　　处：《深圳大学学报（理工版）》2012年第5期412-416,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：武器装备预研基金资助项目(914***101);深圳市双百计划资助项目~~

摘　　要：基于位长四叉树结构,提出一种嵌入零块和上下文模型的图像编码(embedded zeroblockcoding and context modeling,EZBC)改进算法,其仅利用位长四叉树就可以完成编码,并形成算术编码器所需的上下文,不仅可以获得与EZBC算法基本一致的压缩性能,且相对EZBC算法可节约90%的内存.通过位长四叉树对小波系数进行快速定位和重要性判断,不再采用链表操作,加快了编码速度,有利于算法的硬件实现.An improved embedded zeroblock coding （ EZBC ） and context modeling algorithm based on a bit length quadtree is proposed in this paper. The bit length quadtree is used to complete the coding process and create the output context for Arithmetic Coder. The same performance of compression is achieved as EZBC while the memory used during encoding decreased by more than 90% compared to that required in can be used to quickly determine the location of the wavelet coefficients and their lists usually used in EZBC. The encoding speed is implementation. EZBC. The bit length quadtree significance instead of the linked significantly increased, which is helpful for its hardware

关 键 词：图像编码 位长四叉树 离散小波变换 多媒体信号处理 图像处理 零块结构编码 

分 类 号：TN919.81[电子电信—通信与信息系统]