基于多模式叠加的H.264时域隐藏算法

Temporal error concealment for H.264 based on multi-mode overlapping

为在高误码环境下提高视频通信中重建图像的质量,根据最新H.264标准的特点,提出了一种基于多模式叠加的时域错误隐藏算法。该算法以不同的模式对丢失宏块进行4次掩盖,得到4个隐藏块,以各隐藏块的加权和作为丢失宏块的最终替代块。仿真结果表明,由于利用了宏块模式信息,该算法在不同测试序列及丢包率下的性能均优于传统叠加算法,显著提高了掩盖效果。

To improve the quality of the reconstructed picture in video communication,a new temporal error concealment algorithm for H.264 based on multi-mode overlapping is proposed.In this new method,the corrupted MB is concealed four times,each with different mode.And＇ the weighted superposition of the four concealing MBs is the final replacement of the corrupted MB.Simulation results show that,for different test sequence and packet loss rate,the new method outperforms the traditional overlapping algorithm,greatly enhances the performance of the concealment.