摘要
根据H.264/AVC编码特点,该文提出了一种基于H.264/AVC平台的时域错误隐藏算法,该算法充分利用相邻宏块间运动矢量的空域相关性来恢复受损宏块的运动矢量。为了获得受损宏块更准确的运动矢量,将受损宏块分成16个4×4子块,然后通过本文算法获得每个子块的运动矢量,从而恢复出受损宏块的运动矢量信息。结果表明该算法的错误隐藏效果在主观质量和客观质量评价较BMA算法和Lagrange算法都具有明显的优越性。
According to characteristics of H.264/AVC, this paper proposes a time-domain error concealment algorithm, which is based on the H.264/AVC platform. This algorithm make full use of motion vectors between adjacent macroblocks of spatial correlation to restore the damaged macro block motion vector. In order to obtain more accurate motion vectors, this paper divides the damaged macroblock into 16 4 × 4 sub-blocks, and then the algorithm is used to obtain each sub-block motion vector, thereby restoring a damaged macroblock motion vector information. In compare with BMA algorithm and Lagrange algorithm, the experimental results demonstrate that the proposed algorithm provides acceptable performance both subjectively and objectively.
作者
刘鹏
LIU Peng (Shandong University of Science and Technology, QingDao, 266510, China)
出处
《电脑知识与技术（过刊）》
2010年第15期4270-4272,共3页
Computer Knowledge and Technology
