基于时域相关性的快速HEVC帧间模式判决方法  

Fast Inter-mode Decision for HEVC Based on Temporally Correlation

作　　者：刘娟[1] 钟国韵[1] 王蕾[1] 刘梅锋[1] 徐洪珍[1] 

机构地区：[1]东华理工大学软件学院,江西抚州344000

出　　处：《电视技术》2014年第13期1-6,共6页Video Engineering

基　　金：国家自然科学基金项目(61262001);江西省自然科学基金项目(20114BAB201043);江西省科技支撑计划项目(20112BBE50048)

摘　　要：高效率视频编码（HEVC）相比目前的国际视频编码标准H.264/AVC,在压缩率方面有了较大的提高,但也带来了巨大的编码计算复杂度.为了降低HEVC的编码计算复杂度,提出了一种快速HEVC帧间模式判决方法.统计并分析了相邻两帧之间对应块的编码单元（CU）和预测单元（PU）的时域相关性,在此相关性基础上,跳过了一些冗余CU分割层和PU预测模式,CU层最多只取两种PU预测模式,从而大大减少了所需要进行的率失真代价计算的数量.实验结果显示,与HM7.0相比,该方法在仅损失了0.21％～1.66％的压缩率和0.01～0.09 dB的峰值信噪比的前提下,降低了52.3％～63.5％的编码时间.High efficiency video coding （HEVC） achieves higher compression ratio than the current international video coding standard H.264/AVC. However, it has brought about tremendous computational complexity than H.264/AVC. In order to reduce this eomplexity,a fast inter-mode decision for HEVC is proposed in this paper. The temporally correlation of coding unit （CU） and prediction unit（PU） between two adjacent frames is counted and analyzed. Based on this correlation, at most two PU prediction modes are selected for Rate Distortion（RD）cost calculation to skip the other modes,greatly reducing the number of the needed RD cost calculations. The experiment results show that the proposed algorithm reduces 52.3%-63.5% coding time with only 0.21%-1.66% compression ratio loss and 0.01=0.09 dB peak signal-to-noise ratiodegradation,compared to HM7.0.

关 键 词：效率视频编码 编码单元 预测单元 模式判决 

分 类 号：TN919.81[电子电信—通信与信息系统]