北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (1): 88-91.doi: 10.13190/jbupt.200801.88.063

• 研究报告 • 上一篇    下一篇

面向H.264的码率控制优化算法

王丽丰1,2, 马 建1,3, 王文东1, 封化民2, 汪孔桥3, 肖 晨4   

  1. (1. 北京邮电大学 计算机学院, 北京 100876; 2. 北京电子科技学院 电子信息学院, 北京 100070;
    3.诺基亚(中国)研究中心,北京 100013; 4. 北京航空航天大学 计算机学院, 北京 100083)
  • 收稿日期:2007-02-06 修回日期:1900-01-01 出版日期:2008-02-28 发布日期:2008-02-28
  • 通讯作者: 王丽丰

An Optimized Rate Control Algorithm for H.264

WANG Li-feng1,2, MA Jian1,3, WANG Wen-dong1, FENG Hua-min2, WANG Kong-qiao3,XIAO Chen4   

  1. 1. School of Computer Science and Technology, Beijing University of Posts and Telecommunications, Beijing 100876;
    2.Department of Electronic and Information Engineering, Beijing Electronic Science and Technology Institute, Beijing 100070;
    3. Nokia research center, Beijing 100013; 4. School of Computer Science and Technology, Beijing Hang University, Beijing 100083
  • Received:2007-02-06 Revised:1900-01-01 Online:2008-02-28 Published:2008-02-28
  • Contact: WANG Li-feng

摘要:

基于视频图像编码前的参数信息和I帧图像复杂度的特征量分析,建立算法模型,提出了精确预测初始量化参数(IQPP)算法,该算法可准确预测初始量化参数. 实验结果表明,在低比特率视频应用中,IQPP算法对于视频图像的码率控制精度和率失真优化效果较以往方法有明显提高,而且可以获得较高的平均峰值信噪比(PSNR)值和稳定的重建图像质量.

关键词: 视频编码, 码率控制, H.264, 量化参数, 率失真优化

Abstract:

An initial quantity parameter (QP) prejudgment (IQPP) algorithm that can predict the initial QP precisely is proposed based on statistics of encoded frames and frame complexity eigenvalue of I frame. Experimental results show that IQPP algorithm will greatly enhance the performance of rate control and rate-distortion optimization (RDO). The average peak signal-to-noise ratio (PSNR) will be improved compared to traditional method and a constant picture quality has been achieved at low bit rates.

Key words: video encoder, rate control, H.264, quantity parameter, rate-distortion optimization

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