| 基于H.264/AVC的一种新的帧一层码率控制算法 |
| |
| 引用本文： | 王昭顺,张平.基于H.264/AVC的一种新的帧一层码率控制算法[J].计算机应用,2005,25(12):2800-2802. |
| |
| 作者姓名： | 王昭顺 张平 |
| |
| 作者单位： | 1.北京科技大学信息工程学院； 2.北京科技大学计算机系 |
| |
| 摘 要： | 在参考软件Joint Model(JM)8.4中已给出了码率控制算法JVT-017的提案。由于该算法采用线性模型预测平均绝对差Mean Absolute Difference(MAD),运算量较大且存在一定的误差,为此提出了一种新的帧一层的非线性量化级计算模型。仿真结果显示,与JVT-H017码率控制算法相比,采用改进算法的H.264编码器在在相同条件下码率控制得更准确, 并能获得较高的峰值信噪比PSNR和主观视觉质量,特别在有场景切换的情况下缓冲区并未出现上溢和下溢现象。
|
| 关 键 词： | H.264 码率控制 平均绝对差 QP值 目标比特数 |
| 文章编号： | 1001-9081（2005）12-2800-03 |
| 收稿时间： | 2005-06-23 |
| 修稿时间： | 2005-06-232005-09-11 |
New frame-layer rate control algorithm based on H.264/AVC |
| |
| WANG Zhao-shun,ZHANG Ping.New frame-layer rate control algorithm based on H.264/AVC[J].journal of Computer Applications,2005,25(12):2800-2802. |
| |
| Authors: | WANG Zhao-shun ZHANG Ping |
| |
| Affiliation: | 1.School of Information Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Department of Computer Science,University of Science and Technology Beijing,Beijing 100083,China |
| |
| Abstract: | Rate control algorithm(JVT-H017) has been given in encoder reference software JM(Joint Model) 8.4.However,in JM a linear model is used to predict the MAD,which costs too much operations and exists deviations.A new frame-layer non-linear quantization parameter calculation model was proposed.Simulation results show that,comparing with JVT-H017,the H.264 coder using the proposed algorithm can control the bit rate more accurately and obtain a higher PSNR and visual quality.Especially when the two schemes are applied to the sequence with scene changes,no buffer overflow or underflow is guaranteed. |
| |
| Keywords: | H 264 rate control Mean Absolute Difference(MAD) QP value target bits |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《计算机应用》浏览原始摘要信息 |
|
点击此处可从《计算机应用》下载全文 |
