We conducted a large-scale study of human perceptual quality judgments of High Dynamic Range (HDR) and Standard Dynamic Range (SDR) videos subjected to scaling and compression levels and viewed on three different display devices. While conventional expectations are that HDR quality is better than SDR quality, we have found subject preference of HDR versus SDR depends heavily on the display device, as well as on resolution scaling and bitrate. To study this question, we collected more than 23,000 quality ratings from 67 volunteers who watched 356 videos on OLED, QLED, and LCD televisions, and among many other findings, observed that HDR videos were often rated as lower quality than SDR videos at lower bitrates, particularly when viewed on LCD and QLED displays. Since it is of interest to be able to measure the quality of videos under these scenarios, e.g. to inform decisions regarding scaling, compression, and SDR vs HDR, we tested several well-known full-reference and no-reference video quality models on the new database. Towards advancing progress on this problem, we also developed a novel no-reference model called HDRPatchMAX, that uses a contrast-based analysis of classical and bit-depth features to predict quality more accurately than existing metrics.

中文翻译：

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HDR 还是 SDR？缩放和压缩视频的主观和客观研究


我们对经过缩放和压缩级别并在三种不同显示设备上观看的高动态范围 (HDR) 和标准动态范围 (SDR) 视频进行了人类感知质量判断的大规模研究。虽然传统预期 HDR 质量优于 SDR 质量，但我们发现主体对 HDR 与 SDR 的偏好在很大程度上取决于显示设备以及分辨率缩放和比特率。为了研究这个问题，我们收集了 67 名志愿者在 OLED、QLED 和 LCD 电视上观看了 356 个视频的 23,000 多个质量评级，除此之外，我们还发现，在较低比特率下，HDR 视频的质量通常低于 SDR 视频，尤其是在 LCD 和 QLED 显示器上观看时。由于能够测量这些场景下的视频质量很有意义，例如为有关缩放、压缩以及 SDR 与 HDR 的决策提供信息，因此我们在新数据库。为了推进这个问题的进展，我们还开发了一种名为 HDRPatchMAX 的新型无参考模型，该模型使用基于对比的经典和位深度特征分析来比现有指标更准确地预测质量。