A surprising amount of heat can be generated in video quality measurement not just between competing vendors but also champions of different algorithms. It has risen up the agenda, as was evident at this year’s NAB 2019, because of growing use of streaming over networks of varying capacity to devices of different types and resolutions. This makes it harder for broadcasters, operators and content owners to deliver a consistent viewing experience and has driven demand for better measurements of perceptual video quality against a constantly moving target. The field has attracted a number of start-ups and also standards initiatives, some from established bodies and others led by operators, aiming to emulate and automate human video perception. One problem has always…