采用运动矢量的视频快速运动估计算法

Fast Motion Estimation Algorithm Based on Motion Vector

提出了利用运动矢量来解决视频编码时间过长的观点。结合H.264标准的UMHexagons算法,在起始点预测和搜索模板部分做出了优化,能够有效地降低搜索过程中的搜索点,提高视屏编码效率。通过对5种运动程度不同的视频序列进行测试,实验证明,对比原算法,优化后的算法视频的信噪比只下降了0.01～0.02dB,运动估计时间却减少了10%～30%。

Motion vector is proposed to solve the problem that video coding is very time-cunsuming.Combined with UMHexagons algorithm of H.264 standard,the starting point prediction and search template is optimized,which can effectively reduce the search points in the search process and improve the efficiency of video coding.Five video sequences with different motion levels are tested.The experimental results show that compared with the original algorithm,the SNR of the optimized algorithm decreases only-0.01 dB ~0.02 dB,but the motion estimation time decreases by 10%~30%.