基于H.264预测模式选择的并行算法  

The Parallel Fast Prediction Mode Selection Algorithm Based on H.264

作　　者：卞凤杰 齐金鹏[1] 刘树娟[1] 李林鸽 

机构地区：[1]东华大学信息工程与科学技术学院,上海201600

出　　处：《电子科技》2017年第4期83-86,91,共5页Electronic Science and Technology

基　　金：国家自然科学基金(61104154);上海市自然科学基金(16ZR1401300;16ZR1401200)

摘　　要：针对H.264编码器提出了一种基于线程级别的并行化算法,用于快速RDO模式决策,可以有效地解决H.264编码器帧内模式决策和帧间模式决策之间的数据依赖性,开发出线性级别的并行快速模式决策算法。此外,该方法可以容易地映射到硬件架构,同时采用改进的比特率估计算法和低复杂性的整数失真估计方法。实验结果表明,文中算法减少了总编码时间,降低了运动估计ME的计算开销,同时保持较低的PSNR损失和比特率增加。A new fast RDO inter frame mode decision algorithm based on thread level parallelization is proposed in this paper. It can effectively solve the data dependence between H. 264 Intra Mode Decision and the inter frame mode decision,the fast RDO inter frame mode decision algorithm based on thread level parallelization can be proposed. In addition,the proposed method can be easily mapped to hardware architectures which use multi-core processors. The paper also uses the improved bit rate estimation algorithm and a low complexity integer distortion estimation method. Experimental results show that the algorithm in this paper reduces the total encoding time,and reduces the computational overhead of motion estimation ME,while maintaining very low PSNR loss and bit rate increment.

关 键 词：H.264/AVC 视频编码 帧内预测 帧间预测 并行 多核处理器 

分 类 号：TN919.81[电子电信—通信与信息系统]