一种用于H.264视频容错转码的帧内宏块刷新算法  

Error Resilience Transcoding Using Macroblock Intra-refresh Algorithm for H.264 Video Streaming

作　　者：龚婷[1] 宋建新[1] 

机构地区：[1]南京邮电大学图像处理与图像通信实验室,江苏南京210003

出　　处：《电视技术》2012年第1期30-33,共4页Video Engineering

摘　　要：无线网络信道具有误码率高、延时抖动等不稳定的特性。为了保证视频信息从有线网络到无线网络中传输的质量,需要对视频进行容错转码。基于H.264容错转码系统,利用转码结构中解码部分的运动矢量信息,自适应地在编码部分进行帧内刷新,以提高视频的抗误码能力。实验结果对比表明,该帧内刷新算法能够以较少的比特率为代价,有效地提高了接收端的视频质量。The wireless network channel has instable characteristics with high bit error rate and delay jitter. In order to ensure the quality, the video streaming need to be error-resilience transcoded before the transmission from wired network to wireless network. In this paper, the algorithm based on H. 264 error-resilience transcoding system can refresh the macroblocks adaptively at the coder using motion vector extracted from the decoder for impro- ving the video robustness. The experimental results demonstrate that the intra-refresh algorithm can effectively improve the video quality in the receiver with the low cost of bit rate.

关 键 词：H.264标准 容错转码 帧内刷新 

分 类 号：TN919.81[电子电信—通信与信息系统]