H.264的差错控制与错误隐藏技术研究

Error control and error concealment techniques used in H.264

针对无线应用中的传输错误和IP网络拥塞导致的视频数据包丢失,H.264采用了一系列的技术。介绍了H.264所使用的差错控制和错误隐藏技术,重点讨论了基于灵活宏块重排(Flexible Macroblock Ordering,FMO)的差错控制技术,及基于整帧丢失的帧拷贝(Frame Copy)和运动矢量拷贝(Motion Copy)错误隐藏技术和基于宏块丢失的帧内隐藏和帧间隐藏技术。在此基础上,利用ITU-T的误码模型(Error Pattern)对H.264的差错隐藏的性能进行了仿真,并对错误隐藏的效果进行了定量分析。

H.264 utilizes a series of technologies against the transmission errors in wireless environment and data loss caused by IP network＇s congestion.This paper introduces the error control and error concealment technologies in H.264,and focuses on Flexible Macroblock Ordering（FMO） and error concealment technologies such as Frame Copy and Motion Copy based on frame loss and intra concealment and inter concealment based on Macroblock loss.Based on them,the error patterns provided by ITU-T are used to simulate the wireless channel and the quantificational performance of the error concealment will be given out.