Status Input Document Title Evaluation of Scalable versus Single Layer Compression on Consumer HDR Displays

In this work, we evaluate the compression of HDR content using either a single layer or scalable approach. Content were evaluated on a 10-bit per channel, P3 display with a peak luminance of 1,000 nits. Evaluated content was graded on a display with higher peak luminance than the one used in this work. Simulations were compliant with the anchors defined in the HDR Call for Evidence (CfE) [1] and the subjective evaluations followed the guidelines of the CfE. Results point towards a higher efficiency of the single layer compression scheme, however the amount of increased efficiency was really hard to judge since the CfE suggested tests conditions were not suited for the task in hand. More specifically, for three out of five sequences, the single layer tends to outperform the scalable approach. For the other two sequences, the difference in quality between the lower and higher bit rates is not significant enough to reach any conclusion. Furthermore, comparison with tests performed on the SIM2 shows that using a display with lower peak luminance can smooth out compression artifacts. We plan to address the above challenges in future contributions