基于H.264的误码隐藏技术

Error concealment method for H.264 video

为了在高误码环境下提高视频通信质量,提出一种改进的基于H.264的误码隐藏技术。对于帧内编码图像,根据图像直方图信息计算图像的光滑特性,然后自适应地选择线性插值的方法。对于帧间编码图像,根据不同大小块编码类型和多参考帧的特性,能够更准确地估计出丢失的MV,进行时域误码隐藏。实验表明,此方法同H.264参考软件JM11.0方法相比,具有更好的主客观图像恢复质量。

The error concealment method for the H.264 video is proposed to improve the communication quality.For intra frame, the spatial error concealment modes are adaptively selected between bilinear interpolation and directional interpolation according to the structure characters of the neighbor blocks.The smoothness characters are described by the histogram of the blocks.For inter frame,the motion vectors of 4×4 blocks in the missing frame and multi-reference frames are used to determine the method of temporal error concealment.Experimental results show that the proposed method has better recovery result than the one of H.264 reference software JM11.0,and improves the subjective and objective quality obviously.