计算机应用与软件2016，Vol.33Issue(8)：183-184,259,3.DOI:10.3969/j.issn.1000-386x.2016.08.041
一种 HEVC 码率控制改进算法
AN IMPROVED ALGORITHM FOR HEVC RATE CONTROL
摘要
Abstract
The rate control algorithm based on R-λmodel adopted by HEVC (High Efficiency Video Coding)has achieved great performance in both controlling the accuracy of output bitrate and improving coding efficiency.But it does not consider the influence brought forward by scene changes in practical video coding.This paper proposes a new rate control algorithm for scene changes.We first detect whether there are the scene changes by the difference of luma between frames and the variation tendency of the difference.When the scene change occurs,the parameters in rate control and coding structure will be all adjusted instantly and adaptively.Experiment shows that comparing with the rate control in HEVC itself,ours can handle with scene changes in video sequences effectively.The quality is raised and the coding complexity is decreased,while the accuracy of output bitrate is still maintained.关键词
码率控制/场景切换/HEVC 编码Key words
Rate control/Scene change/HEVC分类
信息技术与安全科学引用本文复制引用
周建政..一种 HEVC 码率控制改进算法[J].计算机应用与软件,2016,33(8):183-184,259,3.基金项目
杭州市重大科技创新项目（20142011 A07）。 （）
