| 基于宏块合并的H.264模式选择算法 |
| |
| 引用本文： | 赵晓焱,刘尚旺,毛文涛,李彤亮.基于宏块合并的H.264模式选择算法[J].郑州大学学报(自然科学版),2013(3):54-57. |
| |
| 作者姓名： | 赵晓焱 刘尚旺 毛文涛 李彤亮 |
| |
| 作者单位： | [1]河南师范大学计算机与信息工程学院,河南新乡453007 [2]郑州大学信息工程学院,河南郑州450001 |
| |
| 基金项目： | 国家自然科学基金资助项目,编号U1204609; 河南省重点科技攻关项目,编号102102210179; 河南师范大学青年科学基金资助项目,编号2012QK23 |
| |
| 摘 要： | H.264新技术的引入提高了压缩效率,但同时编解码器运算复杂度也成倍增加.为了减小H.264的编码算法复杂度,对编码选项和模式选择算法进行了优化.算法以运动矢量合并为基础,采用1/4像素精度的细化运动估计以减低码率,对P帧宏块是否采用帧内编码模式,利用平均比特率和宏块平均边缘差值进行预判断.实验结果表明,算法在不增加峰值信噪比和码率的基础上,平均节省运动估计时间35.19%,节省编码时间48.98%.
|
| 关 键 词： | 帧内预测 模式选择 运动估计 |
Algorithm of Mode Selection Based on the Macroblock Merger in H. 264 |
| |
| ZHAO Xiao-yanI,LIU Shang-wang,MAO Wen-tao,LI Tong-liang.Algorithm of Mode Selection Based on the Macroblock Merger in H. 264[J].Journal of Zhengzhou University (Natural Science),2013(3):54-57. |
| |
| Authors: | ZHAO Xiao-yanI LIU Shang-wang MAO Wen-tao LI Tong-liang |
| |
| Institution: | 1. College of Computer and Information Engineering, Henan Normal University, Xinxiang 453007, China; 2. College of Information Engineering, Zhengzhou University, Zhengzhou 450001, China) |
| |
| Abstract: | H. 264 adopted many advanced techniques to improve the compression efficiency, but codec operation complexity were multiplied. In order to reduce the coding algorithm, coding options were ana- lyzed and selected, and then a mode decision of optimization algorithm was proposed. Algorithm was based on merger of motion vector, and motion estimation of a quarter pixel accuracy was used to lower the code rate. Average bit rate AR and average marginal difference ABE of macro block were used to prejudge whether to adopt inter-prediction in P frame coding. Simulation experiment result showed that motion esti- mation time and encoding time would be lowered about 35.19% and 48.98% respectively in average while PSNR and code rate were also reduced. |
| |
| Keywords: | inter-prediction mode decision motion estimation |
| 本文献已被 维普 等数据库收录！ |
|
