A Study of High Frame Rate Video Formats

High frame rates are acknowledged to increase the perceived quality of certain video content. However the lack of high frame rate test content has previously restricted the scope of research in this area - especially in the context of immersive video formats. This problem has been addressed through the publication of a high frame rate video database BVI-HFR, which was captured natively at 120 fps. BVI-HFR spans a variety of scenes, motions and colours, and is shown to be representative of BBC broadcast content. In this paper temporal down-sampling is utilised to enable both subjective and objective comparisons across a range frame rates. A large-scale subjective experiment has demonstrated that high frame rates lead to increases in perceived quality, and that a degree of content dependence exists - notably related to camera motion. Various image and video quality metrics have been benchmarked on these subjective evaluations, and analysis shows that those which explicitly account for temporal distortions (e.g. FRQM) provide improved correlation with subjective opinions compared to generic quality metrics such as PSNR.