The Relationship Among Video Quality, Screen Resolution, and Bit Rate
The Relationship Among Video Quality, Screen Resolution, and Bit Rate
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DOI：
10.1109/tbc.2011.2121650
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发表时间：
2011-06-01
影响因子：
4.5
通讯作者：
Wolf, S.
中科院分区：
文献类型：
--
作者：
Cermak, G.;Pinson, M.;Wolf, S.
对于给定的屏幕分辨率，高质量视频需要多少带宽？在两个视频质量专家组（VQEG）项目中获得的数据至少可以部分回答这个问题。这项国际主观测试为屏幕分辨率QIF、CIF、VGA和HD产生了大量的平均意见得分（MOS）数据; 264和类似的现代编解码器;以及用于许多比特率。本报告汇总了这些数据。对于每个屏幕分辨率，MOS被绘制为比特率的函数。所有四个数据集的曲线图显示了在给定屏幕分辨率下实现给定视频质量水平所需的比特率。四个数据集之间的关系是有规律的，这表明跨屏幕分辨率的插值可能是合理的。根据这些数据，在给定屏幕分辨率的情况下选择比特率是合理的;在给定比特率的情况下选择屏幕分辨率是不合理的。
How much bandwidth is required for good quality video for a given screen resolution? Data acquired during two Video Quality Experts Group (VQEG) projects allow at least a partial answer to this question. This international subjective testing produced large amounts of mean opinion score (MOS) data for the screen resolutions QIF, CIF, VGA, and HD; for H. 264 and similar modern codecs; and for many bit rates. Those data are assembled in the present report. For each screen resolution, MOS is plotted as a function of bit rate. A plot of all four data sets together shows the bit rate that would be required to achieve a given level of video quality for a given screen resolution. Relations among the four data sets are regular, suggesting that interpolation across screen resolutions might be reasonable. Based on these data, it would be reasonable to choose a bit rate, given a screen resolution; it would not be reasonable to choose a screen resolution given a bit rate.