采用整数变换降低率失真运动估计失真度计算量的研究  

Studying of Computation Complexity Reduction of Rate-distortion Motion Estimation Using Integer DCT Transform

作　　者：王中元[1] 胡瑞敏[1] 田纲[1] 傅佑铭[1] 

机构地区：[1]武汉大学国家多媒体软件工程研究中心,湖北武汉430072

出　　处：《小型微型计算机系统》2007年第8期1520-1522,共3页Journal of Chinese Computer Systems

基　　金：国家自然科学基金(60472040)资助.

摘　　要：基于率失真的运动估计是提高视频编码器运动补偿精度的一个重要手段,但率失真失真度的计算太复杂,长期以来应用一直受限制.本文试用整型DCT变换代替DCT变换来优化计算失真度的纹理因子,从而提高计算速度.文章详细推导了优化计算公式,并用几组相关的实验数据来验证方法的有效性.Rate-distortion is one of the key tools minimizing the motion-compensation prediction error. But for the high computation complexity of it's distortion criterion ,it hasn't been widely used for a long time. In this paper , integer DCT is used to calculate the texture factor of distortion criterion replacing of the DCT transform in order to increase the computation efficiency. The proposed optimization formula is derived in detail by paper, and the validation of this approach is shown by several simulation results.

关 键 词：视频编码 运动估计 整数变换 率失真优化 

分 类 号：TN919.81[电子电信—通信与信息系统]