摘要
结合在差错信道下的视频传输模型,本文分析了在差错信道下传输H.264视频压缩数据存在的编码失真、传输误码失真及扩散失真问题;针对这个问题,讨论了H.264标准中基于宏块的误码掩盖技术及差错信道下基于全局率失真优化的宏块模式判决算法;并结合H.264SEI域的反馈机制和概率统计理论,提出了一种简单估算失真的方法。该模式判决算法较好地改善了抗误码性能。
Based on the video transmission model over error-prone channels, this paper analyzes the data distortion problem when transmiting H.264 coded video streams. And we also discuss a widely accepted technique that introduces more intra-coded information on the macroblock basis. Additionally,this paper introduces a rate-distortion-based optimized mode selection algorithm and a way to estimate the distortion based on statistics and SEI.This mode selection algorithm is very suitable to obtaining performance bounds.
出处
《计算机工程与科学》
CSCD
2005年第7期40-42,共3页
Computer Engineering & Science
