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SPIHT编码图像传输的错误保护技术

丁学文,杨兆选,曹继华,郑宏兴,苏育挺(天津大学电信学院,天津 300072;天津工程师范学院电子工程系,天津 300222)

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人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。
关键词
Error Protection Technique for SPIHT-based Image Transmission

DING Xue-wen, YANG Zhao-xuan , CAO Ji-hua , ZHENG Hong-xing, SU Yu-ting,DING Xue-wen, YANG Zhao-xuan , CAO Ji-hua , ZHENG Hong-xing, SU Yu-ting,DING Xue-wen, YANG Zhao-xuan , CAO Ji-hua , ZHENG Hong-xing, SU Yu-ting,DING Xue-wen, YANG Zhao-xuan , CAO Ji-hua , ZHENG Hong-xing, SU Yu-ting,DING Xue-wen, YANG Zhao-xuan , CAO Ji-hua , ZHENG Hong-xing, SU Yu-ting()

Abstract
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.
Keywords
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