| 基于双模预测的精确码率控制 |
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| 引用本文： | 朱仲杰,白永强,蒋刚毅,粱 丰.基于双模预测的精确码率控制[J].中国图象图形学报,2010,15(4):541-546. |
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| 作者姓名： | 朱仲杰 白永强 蒋刚毅 粱 丰 |
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| 作者单位： | (1.浙江万里学院宁波市DSP重点实验室，宁波 315100;2.郑州大学物理工程学院，郑州 450001;3.宁波大学电路与系统研究所，宁波 315211） |
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| 基金项目： | 国家自然科学基金项目（60692066）；浙江省自然科学基金项目(Y107740);浙江省科技攻关项目（2008C31038）;宁波市自然科学基金项目(2008A610015) |
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| 摘 要： | 精确的码率控制是进行高效视频编码与传输的关键。针对现有码率控制技术的不足，提出了在视频编码中采用两个率失真模型进行码率预测的思想以提高码率控制的精度。对H.264的G012码率控制框架进行改进，给出一种基于双模预测的自适应码率控制方法。实验仿真结果显示，与传统的单模码率控制方法相比，基于双模预测的码率控制算法能保证在不影响编码质量的前提下有效地提高码率控制的精度。
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| 关 键 词： | 码率控制 率失真模型 双模预测 |
| 收稿时间： | 9/7/2008 12:00:00 AM |
| 修稿时间： | 2009/2/19 0:00:00 |
Accurate Rate Control by Using Two Rate distortion Models |
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| ZHU Zhongjie,BAI Yongqiang,JIANG Gangyi and LIANG Feng.Accurate Rate Control by Using Two Rate distortion Models[J].Journal of Image and Graphics,2010,15(4):541-546. |
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| Authors: | ZHU Zhongjie BAI Yongqiang JIANG Gangyi and LIANG Feng |
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| Affiliation: | ZHU Zhongjie 1),2),BAI Yongqiang 1),JIANG Gangyi 3),LIANG Feng 1)1)(Ningbo Key Laboratory of DSP,Zhejiang Wanli University,Ningbo 315100) 2)(Physical Engineering College,Zhengzhou University,Zhengzhou 450001) 3)(Institute of Circuits and Systems,Ningbo University,Ningbo 315211) |
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| Abstract: | Accurate rate control is a key technology for efficient video coding and transmission.In view of the drawbacks of existing rate control algorithms,a novel idea that implements rate control by using two rate-distortion models is introduced to enhance the rate-control precision.And a new double model based rate-control algorithm is proposed by adapting the G012 framework of H.264 standard.Experiments are conducted and the results reveal that,compared with the original G012 algorithm,the proposed algorithm can... |
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| Keywords: | rate control rate-distortion model prediction with two models |
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