Fast Rate Distortion Optimized Quantization Method for HEVC

被引:0
|
作者
Wang, Meng [1 ]
Xie, Xiaodong [1 ]
Fan, Hongfei [1 ]
Wang, Shanshe [1 ]
Li, Junru [1 ]
Dong, Shengfu [1 ]
Xiang, Guoqing [1 ]
Jia, Huizhu [1 ]
机构
[1] Peking Univ, Natl Engn Lab Video Technol, Beijing 100871, Peoples R China
基金
国家高技术研究发展计划(863计划); 美国国家科学基金会;
关键词
HEVC; RDOQ; video coding; fast algorithm; HM;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Rate-Distortion Optimized Quantization (RDOQ) brings significant improvement of coding performance in High Efficiency Video Coding (HEVC). However, it results in high computational complexity to determine the best quantization levels for each transform coefficient when applying rate and distortion optimization operation. In this paper, we firstly proposed an efficient way to skip the all zero coding units. Then we further propose a fast RDOQ scheme by skipping the optimization step of All Quantized Zero Blocks except DC Coefficient (AQZB-DC). Moreover, a rate difference model is established to select optimal quantization level for AQZB-DC blocks. Experiments are carried out on reference software HM 16.0 and the results show that the proposed method achieves 42.00% and 39.63% quantization time saving under Random Access (RA) and Low Delay (LD) configuration on average, while the BD-Rate loss is only 0.03% and 0.06%, respectively.
引用
收藏
页码:830 / 833
页数:4
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