一种适于移动视频通信的运动估值算法  

A Motion Estimation Algorithm for Mobile Video Communications

作　　者：陈国斌[1] 刘济林[1] 姜超[1] 王正友[1] 

机构地区：[1]浙江大学信息与电子工程系,浙江杭州310027

出　　处：《电路与系统学报》2004年第5期34-37,共4页Journal of Circuits and Systems

摘　　要：在视频通信中,由于移动终端的处理能力、电池容量和存储空间的限制,降低视频编码计算量成为实时视频通信急需解决的问题。运动估值作为视频编码算法中最耗时的模块,直接影响着整个编码算法的性能和重建视频质量。本文在分析低码率压缩码流运动矢量场以及误差曲面性质的基础上,提出一种基于时空预测的快速运动估值方法。仿真结果表明:与 MVFAST 相比,本文方法不需要另增存储开销,将计算复杂度降低了 35%以上,而视频质量仅下降 0.1dB 左右。同时它结构简单,比较易于硬件实现。In mobile multimedia communications, there is a heavy demand for low computational complexity of video coding due to the limited mobile terminals’ processing power, battery life and memory capacity. Motion estimation is the most intensive computational process in video coding. It affects not only the encoder’s performance, but also the reconstructed video quality. In this paper, based on the analysis of the characteristics of error surface and motion vector field, we propose a fast search strategy for motion estimation is proposed. Simulation results show that compared with MVFAST, no any extra memory is required in the proposed algorithm, the computational complexity will decrease over 35% at the expense of only slight degraded image quality.

关 键 词：运动估值 误差曲面 SAD 

分 类 号：TN941.1[电子电信—信号与信息处理]