摘要
为提高H.264码流在无线传输中的鲁棒性,提出了一种基于数据分割和扩展窗喷泉(EWF)码的H.264视频的不等差错保护策略.通过H.264数据分割获取重要性不同的信息比特,采用EWF码对其进行分窗,分别采用鲁棒孤波度分布完成LT编码,实现不等差错保护.仿真结果表明,该算法具有较好的抗误码特性,可以提高重建图像的峰值信噪比值,从而保证了视频传输的可靠性.
In order to improve the robustness of H.264 coded video streams over wireless channel,an unequal error protection scheme was proposed on the basis of data partition and expanding window fountain（EWF）codes.Through H.264 data partitioning,differently important information bits were obtained and divided into different windows by using EWF codes.LT coding was completed with robust soliton distribution to implement the unequal error protection.Simulation results showed that the coding algorithm had excellent error-robustness and improved the peak signal-to-noise ratio（PSNR）of reconstructed images,thus ensured the reliable transmission of video over wireless channel.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2012年第4期309-313,共5页
Journal of Tianjin University(Science and Technology)
基金
国家高技术研究发展计划(863计划)资助项目(2009AA011507
2009AA01A336)
国家自然科学基金资助项目(60932007)
国家科技重大专项资助项目(2009ZX03004-006)
关键词
LT码
H.264
EWF
数据分割
不等差错保护
LT code
H.264
expending window fountain
data partition
unequal error protection
