摘要
为了提高质量可伸缩高性能视频编码(SHVC)的编码速度,提出一种基于质量SHVC的帧内预测算法。首先,利用层间相关性来预测可能的深度,排除可能性较小的深度;其次,对可能的编码深度,采用层间预测(ILR)模式进行编码,并对得到的残差系数进行分布拟合检验,判断是否满足拉普拉斯分布从而跳过帧内模式;最后,对深度编码得到的深度残差系数判断是否满足深度提前终止判断条件,如果满足该条件则提前终止以提高编码速度。实验结果表明,所提算法能够在保证编码效率损失很小的情况下使编码速度提高79%。
To increase the coding speed of the quality Scalable High efficiency Video Coding(SHVC),a new intra prediction algorithm based on quality SHVC was proposed.Firstly,the potential depth was predicted by using inter-layer correlation,and the depths with low possibility were eliminated.Secondly,for the likely depth,Inter-Layer Reference(ILR)mode was used to code and examine the residual distribution by using distribution fitting to determine whether the residuals follow a Laplace distribution.If the residual followed the Laplace distribution,intra prediction was skipped.Finally,the depth residual coefficient of depth coding was tested to determine whether to satisfy the depth of early termination,if the condition was met,the code process would be terminated to improve the coding speed.The experimental results show that the proposed algorithm can improve the coding speed by 79%with negligible coding loss.
作者
刘妍君
赵志强
刘艳
崔盈
汪大勇
冉鹏
郭毅军
LIU Yanjun;ZHAO Zhiqiang;LIU Yan;CUI Ying;WANG Dayong;RAN Peng;GUO Yijun(School of Bioinformatics,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Information Science&Engineering,Rizhao Polytechnic,Rizhao Shangdong 276800,China;School of Automation,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
出处
《计算机应用》
CSCD
北大核心
2018年第10期2960-2964,共5页
journal of Computer Applications
基金
重庆自然科学基金资助项目(cstc2016jcyjA0543)~~
关键词
可伸缩高性能视频编码
深度预测
层间预测模式
分布拟合
提前终止
Scalable High efficiency Video Coding(SHVC)
depth prediction
Inter-Layer Reference(ILR)mode
distributed fitting
early termination
