| 基于AVS的快速亚像素运动估计算法 |
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| 引用本文： | 宋雪桦,包祥,吴问云. 基于AVS的快速亚像素运动估计算法[J]. 计算机工程与设计, 2012, 33(7): 2716-2720 |
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| 作者姓名： | 宋雪桦 包祥 吴问云 |
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| 作者单位： | 江苏大学计算机科学与通信工程学院,江苏镇江,212013 |
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| 基金项目： | 江苏省镇江市产学研基金 |
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| 摘 要： | 数字音视频编解码标准(AVS)采用了可变大小块以及1/4像素精度的运动估计技术以提高编码效率.针对视频编码中运动估计计算量大的问题,提出一种改进的亚像素快速搜索算法,该算法采用分象限预测策略,并通过阈值判断提前结束搜索.该算法可以有效地减少亚像素搜索点数,与AVS参考软件中的亚像素全搜索算法相比较,该算法在保证图像质量和编码效率的同时,亚像素搜索点数减少50％～81.25％,编码时间节省了25.36％～34.51％.
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| 关 键 词： | AVS 运动估计 亚像素 匹配误差曲面 搜索算法 |
Fast algorithm of sub-pixel motion estimation based on AVS |
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| SONG Xue-hua , BAO Xiang , WU Wen-yun. Fast algorithm of sub-pixel motion estimation based on AVS[J]. Computer Engineering and Design, 2012, 33(7): 2716-2720 |
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| Authors: | SONG Xue-hua BAO Xiang WU Wen-yun |
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| Affiliation: | (College of Computer Science and Telecommunications Engineering,Jiangsu University,Zhenjiang 212013,China) |
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| Abstract: | Variable block sizes and quarter-pixel motion estimation are applied in audio video coding standard(AVS) to improve coding efficiency.For motion estimation has high calculation capacity,an improved fast search algorithm is presented for sub-pixel,which mainly uses the sub-quadrant prediction strategy,and terminates the search through a threshold.This algorithm reduce the sub-pixel search points effectively.Compared with the sub-pixel full search algorithm of AVS reference software,this algorithm can achieve up to 50%~81.25% searching points reduction and save the encoding time by 25.36%~34.51% while maintaining the image quality and coding efficiency. |
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| Keywords: | AVS motion estimation sub-pixel matching error surface search algorithm |
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