Measuring and Predicting Perceptions of Video Quality Across Screen Sizes with Crowdsourcing

A large-scale crowdsourcing experiment was carried out to study how changes in screen size affect perceptions of video quality. By rescaling video stimuli to different canvas sizes on participants' devices, we collected responses that enabled us to study how encoding artifact visibility is influenced by changes to the screen size. We collected ratings on 1,674 distorted videos from 14,450 participants from four countries and found the data to be reliable and largely consistent. With these data, we evaluated state-of-the-art subjective modeling techniques and benchmarked several objective quality models across screen sizes.