SPIHT编码图像传输的错误保护技术  

Error Protection Technique for SPIHT-based Image Transmission

作　　者：丁学文[1] 杨兆选[1] 曹继华[2] 郑宏兴[2] 苏育挺[1] 

机构地区：[1]天津大学电信学院,天津300072 [2]天津工程师范学院电子工程系,天津300222

出　　处：《中国图象图形学报》2007年第10期1802-1805,共4页Journal of Image and Graphics

基　　金：天津市重点基金项目(07JCZDJC05800);国家自然科学基金项目(60671009);劳动与社会保障部科技项目(LB200405)

摘　　要：提出了一种新的SPIHT编码图像传输错误保护算法。该算法采用数据隐藏技术,将纯2维小波最高一级分解的小波系数嵌入最高分辨率级数据重复传输,对码流中的低频和次低频子带系数进行错误保护;对于其他高频子带系数的修复,则利用子带内或者子带间相关性,通过线性数据内插的错误隐藏技术,对受损的小波系数进行修复。实验结果表明,该算法不增加数据冗余,能够有效提高重建图像质量。This paper presents an error protection technique for SPIHT-coded image transmission in etTor-prone network. For the lowest and next lowest frequency coefficients, protection scheme based data hiding is performed. The lowest and next lowest frequency coefficients, which are taken as the hidden data, are extracted from the compressed bitstream, and embedded back into the same bitstream. The restored hidden data is used to conceal errors. The coefficients that cannot be recovered in other high frequency coefficients reconstruction are predicted through linear interpolation based on intrasubband or inter-subband correlation. Experimental results show that the proposed method achieves good and stable error performance with minimal additional redundancy.

关 键 词：SPIHT编码 纯2维小波 错误保护 数据隐藏 错误隐藏 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]