H.264视频流自适应多纹理方向错误隐藏方案研究  

Project Study of Adaptive Error Concealment Based on Multi-texture Direction for H.264 Video Stream

作　　者：张小红[1] 胡婷[1] 

机构地区：[1]江西理工大学信息工程学院,江西赣州341000

出　　处：《系统仿真学报》2015年第3期571-578,共8页Journal of System Simulation

基　　金：国家自然科学基金(11062002;61363076);江西省教育厅科技项目(GJJ14465;GJJ14439);江西省研究生创新专项资金项目(YC2013-S197)

摘　　要：H.264标准的错误隐藏算法对于纹理信息复杂的错误宏块,视频图像恢复后的平滑性较差。针对H.264标准算法存在的不足,提出了一种自适应的视频流多纹理方向错误隐藏方案,采用两个阈值设定策略自适应的设定Sobel边缘检测算法的阈值,通过改进的Sobel算法,检测出错误宏块的相邻块可能边缘方向,同时结合边缘像素差值成本函数自适应的确定错误数据块中每个像素点的插值方向,并根据其插值方向进行方向插值来恢复。JM8.6仿真结果表明,与标准算法相比,其隐藏效果在主观视觉判断和客观数值计算上都有一定的提高。The smoothness of restored video is poor to the complex-texture block for the H.264 standard error concealment algorithm. Aiming at the H.264 questions, the project of adaptive error concealment based on multi-texture direction was proposed. Two thresholding methods were used to set the thresholding of Sobel edge detection algorithm, and the proposed Sobel algorithm was judged to detection the edges of adjacent. Cost function of the boundary pixel difference was combined with to determine the interpolation direction for each pixel of error block, and then, the error block was recovered by the interpolation direction of each pixel. JM8.6 simulation experiments show that the proposed method outperforms the standard algorithm based on subjective and objective measures.

关 键 词：H.264 错误隐藏 复杂纹理 自适应 方向插值 

分 类 号：TN919.81[电子电信—通信与信息系统]