摘要
为了减小可伸缩视频编码(SVC)的编码复杂度,提出了一种H.264 SVC快速模式选择算法.通过分析SVC各编码模式的使用频率和条件概率情况,对出现概率高的模式进行优先搜索,当满足局部最优和率失真代价单调性条件时,提早结束模式搜索.同时,利用层间模式相关性,除去不适用的模式.缩小候选模式搜索范围.实验结果表明,与模式全搜索方法相比,本文算法在图像质量和码率损失极小的前提下,编码速度显著提高.
To reduce the computational complexity of scalable video coding（SVC）,a novel fast mode decision algorithm for H.264 scalable video coding is proposed.First,according to the analysis of mode occurrence frequency and conditional probability,the frequently occurred modes were examined at priority.If both the local-optimal condition and the monotony of rate-distortion cost condition were satisfied,the mode search process was terminated.Moreover,the candidate modes were selected based on the inter-layer mode correlation and the not suitable modes were eliminated.Comparing with the full mode search method,the proposed method accelerates the coding speed remarkably with negligible loss of quality and bit-rate.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2012年第2期129-133,共5页
Journal of Harbin Institute of Technology
基金
国家自然科学基金重大科研仪器设备研制专项(40927001)
浙江省重大科技专项(2009C11035)
中央高校基本科研业务费专项资金资助项目
关键词
可伸缩视频编码
模式选择
提早退出
层间模式相关性
scalable video coding
mode decision
early-termination
inter-layer mode correlation
