一种高效的抗误码能力强的图像编码方案  

AN EFFICIENT AND ROBUST SCHEME OF IMAGE-CODING

作　　者：顾炜[1] 胡波[1] 凌燮亭[1] 张立明[1] 

机构地区：[1]复旦大学电子工程系计算机辅助测试室,上海200433

出　　处：《红外与毫米波学报》2001年第3期189-193,共5页Journal of Infrared and Millimeter Waves

基　　金：复旦大学科学技术青年基金 (编号 EX86 30 1)资助项目&&

摘　　要：提出了一种新的图像编码方案 .对子波变换后的系数进行变系数定长编码 ,由符号概率表生成字典 ,并用类似算术编码的方法进行符号串和字典中码字的映射 ,同时采用一系列的纠错方法以进一步提高方案的抗误码能力 .模拟结果表明 ,该方案与其他方案相比 ,具有压缩比高 ,抗误码能力强等优点 .A new wavelet-based image-coding scheme was proposed. The Variable-Coefficient Fixed-Length (VCFL) Coding method was used to code the wavelet subband coefficients of the image. The codebook was obtained from symbol probability. By a way similar to Arithmetic Coding, a bunch of symbols was mapped to the code in the codebook. Several error-concealment methods were also adopted to improve the robustness. Simulation results show that our new scheme has higher compression ratio and robustness.

关 键 词：子波变换 算术编码 抗误码能力 变系数定长编码 

分 类 号：TN919.81[电子电信—通信与信息系统]