计算机应用

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基于并行和预测的方向菱形运动估计算法

魏长虎 贾智平 程志   

  1. 山东大学计算机科学与技术学院 山东大学计算机科学与技术学院 山东大学计算机科学与技术学院
  • 收稿日期:2008-05-19 修回日期:2008-07-14 发布日期:2008-11-01 出版日期:2008-11-01
  • 通讯作者: 魏长虎

Directional diamond motion estimation algorithm based on parallelism and prediction

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  • Received:2008-05-19 Revised:2008-07-14 Online:2008-11-01 Published:2008-11-01
  • Contact: Chang-hu WEI

摘要: 对MPEG-4视频编码中的块运动估计算法进行分析,得出算法中存在的并行性。将多核并行计算的思想应用于方向菱形模板的运动估计算法中,并引入一种预测机制来充分提高并行性,得到基于多核并行预测的方向菱形运动估计算法(PPDDME)。在PC机和Omap5910 两个平台上的验证表明,该算法相比串行算法在保证了压缩质量的前提下,有效提高了编码速度。

关键词: MPEG-4, 运动估计, 并行计算, 预测

Abstract: The motion estimation algorithm in the MPEG-4 video encoding was studied and the potential parallelism in the algorithm was analyzed. Then the multi-core parallel computing concept was used in the directional diamond searching algorithm, and a prediction mechanism was introduced to improve the degree of parallelism. Then the directional diamond Motion estimation algorithm based on parallelism and prediction (PPDDME) was proposed. The experimental results coming from PC and the Omap5910 embedded platform show that the encoding speed is improved efficiently and the compression quality is the same as the serial algorithm.

Key words: MPEG-4, motion estimation, parallel computing, prediction