一种基于JMVC参考模型的运动估计优化算法  

A motion estimation optimization algorithm based on JMVC reference model

作　　者：袁梅冷[1,2] 杨张[2] 雷海军[2] 

机构地区：[1]深圳职业技术学院计算机工程学院,广东深圳518055 [2]深圳大学计算机与软件学院,广东深圳518060

出　　处：《计算机工程与科学》2015年第6期1208-1213,共6页Computer Engineering & Science

基　　金：国家自然科学基金-广东联合项目(U1301252);深圳市战略性新兴产业发展专项资金资助项目(JCYJ20120613113419607);校重点项目(2213k3190007)

摘　　要：运动估计(ME)是视频压缩编码中的关键技术,运动估计算法对视频质量、编码复杂度和码率都有直接影响。TZSearch算法是JMVC参考实现中一种基于混合模板的快速搜索算法。通过提高搜索起点准确度,采用基于视频运动特性的搜索策略,采取阈值设置和大小步长相结合等方法对算法进行优化。在多视点视频编码测试平台JMVC 8.5中对多视点视频序列BallRoom、Exit进行测试。实验结果表明,与JVMC的TZSearch算法相比,在保证视频重构质量和码率增加很少的情况下,本算法编码时间减少50%以上。Motion estimation is a key technique of video compression, which has an important impact on video quality, coding complexity and code rate. The TZSearch algorithm is a fast search algorithm based on hybrid template in the reference implementation of JMVC. We propose an optimization algo- rithm to improve the accuracy of the start search point by adopting the search strategies based on video motion characteristics and by setting the threshold according to the step size. Experiments through multi- view video test sequences of Ball-Room and Exit show that the proposed algorithm can reduce at least 50% encoding time compared with the original TZSearch algorithm while maintaining the reconstruction quality of the video with little increase of the code rate.

关 键 词：运动估计 编码复杂度 块匹配 TZSearch 阈值 JMVC 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]