摘要
为保证星载遥感图像压缩传输的可靠性,针对常用的错误保护方法不考虑码流不同部位不同的错误敏感度,码流重要信息得不到重点保护的问题,提出了基于JPEG2000标准第11部分(即JPEG2000无线传输(JPWL))的遥感图像JPEG2000压缩码流的错误保护方案。根据错误敏感度描述符提供的码流错误敏感度,利用错误保护块对码流执行不等错误保护;在解码时应用残余错误描述符提供的码流残余错误信息进行错误隐藏。仿真结果表明,与常用方法相比,该方案不仅以较小的代价极大地提高了解码率,而且能够有效地纠正传输误码、降低误码影响,提高恢复图像质量,较适合用于星载遥感图像的压缩传输。
Since traditional error protection methods often neglect the difference of error sensitivity in different parts of codestream, and might lead the leakage of protection for important information, an error protection scheme of JPEG2000 codestream of remote sensing image was designed based on JPEG2000 part II, namely JPEG2000 Wireless （JPWL） to achieve reliable transmission of the image over satellite channel and more protections for important parts of codestream. According to error sensitivity information provided by Error Sensitivity Descriptor （ESD）, Error Protection Block （EPB） was applied to perform unequal error protection （UEP） for the codestream. Error concealment method was used on the basis of the residual error information provided by Residual Error Descriptor （RED） when decoding. Experiment results show that, compared with the traditional methods, the proposed scheme not only can clearly improve decoding ability with reduced overhead cost, effectively correct transmission error and decrease their impact on decoding, but also largely upgrade the decoded images quality. Thus this scheme proves to be adaptive to remote sensing image compression and transmission.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2007年第6期1441-1446,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金资助项目(60472048)
