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针对视频传输中的丢包,空域误码掩盖技术使用丢失像素的相邻信息在解码端对它进行恢复。为了提高算法恢复的准确性,该文提出了一种内容自适应的H.264空域误码掩盖算法。该算法根据受损块的边缘像素和编码模式信息,将其内容分为平滑块和边缘块:对于平滑块采用双线形插值的方法;对于边缘块,则结合其边缘像素与编码模式信息选择较好的插值方向。仿真结果表明,对于多种视频序列和不同宏块丢失率,其性能均稳定地优于H.264标准的算法,在25%宏块丢失率下,恢复视频峰值信噪比相对H.264标准算法提高0.5～3dB。
For packet loss in video transmission, airspace bit error concealment technique uses adjacent information of the missing pixel to recover at the decoding end. In order to improve the accuracy of algorithm recovery, this paper proposes a content adaptive H.264 spatial error concealment algorithm. The algorithm divides the content into smooth blocks and edge blocks according to the information about the edge pixels and coding mode of the damaged block: the method of using bilinear interpolation for the smooth block, the edge pixels and the coding mode information Better interpolation direction. The simulation results show that the performance of the algorithm is better than that of the H.264 standard for a variety of video sequences and different macroblock loss rates, and the peak SNR of the video is restored at H.264 macroblock loss rate Algorithm to improve 0.5 ~ 3dB.