实验科学与技术2024，Vol.22Issue(3)：9-14,6.DOI:10.12179/1672-4550.20230345
量化参数对H.266压缩标准4K视频质量影响实验
Experiment on the Impact of Quantization Parameters on 4K Video Quality of the H.266 Compression Standard
摘要
Abstract
The versatile video coding(H.266/VVC)takes several improvements in each coding step,and the overall effect of many measures does result in a doubling of the coding efficiency compared to high efficiency video coding(HEVC).In this paper,several video sequences with different dynamic conditions(*.yuv)are compressed and decompressed using the H.266 codec,and the differences in coding efficiency and time loss after video compression are investigated by varying the quantization parameters(QP)values at different bit rates.Experiments show that for lower bit rates and near the bit rate commonly used for 4K video(20 Mbps),there is a significant advantage in both bit coding rate and peak signal to noise radio(PSNR),but at very large bit rates,both perform nearly identically.Calculations of the time multiplier and bitrate savings reveal a wide range of results for each video sequence,suggesting that coding complexity and coding performance are highly dependent on the selected video sequence itself.H.266 improves significantly for more complex video sequences,with a significant increase in coding complexity,up to 100x at some bitrates.H.266 also poses a significant challenge to hardware arithmetic,which will need to be further optimized in the future.关键词
多功能视频编解码方式/4K/超高清视频/量化参数/峰值信噪比Key words
H.266/VVC/4K/ultra high-definition/QP/PSNR分类
信息技术与安全科学引用本文复制引用
金伟正,宁明慧,王欣然,梁芳..量化参数对H.266压缩标准4K视频质量影响实验[J].实验科学与技术,2024,22(3):9-14,6.基金项目
国家重点研发计划(2018YFB1201602-05). （2018YFB1201602-05）
