• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2015, Vol. 37 ›› Issue (06): 1208-1213.

• 论文 • 上一篇    下一篇

一种基于JMVC参考模型的运动估计优化算法

袁梅冷1,2,杨张2,雷海军2   

  1. (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)
  • 收稿日期:2014-03-23 修回日期:2014-09-16 出版日期:2015-06-25 发布日期:2015-06-25
  • 基金资助:

    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)

A motion estimation optimization algorithm
based on JMVC reference model   

YUAN Meileng1,2,YANG Zhang2,LEI Haijun2   

  1. (1.School of Computer Engineering,Shenzhen Polytechnic,Shenzhen 518055;
    2.College of Computer and Software Engineering,Shenzhen University,Shenzhen 518060,China)
  • Received:2014-03-23 Revised:2014-09-16 Online:2015-06-25 Published:2015-06-25

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。

关键词: 运动估计, 编码复杂度, 块匹配, TZSearch, 阈值, JMVC

Abstract:

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 algorithm 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.

Key words: motion estimation;coding complexity;block matching;TZSearch; threshold value;JMVC