I was reading an advertizing code which specifies:
""For TV Advertisements the size of the “Supers” shall be of minimum 12 pixel height....."
This got me thinking: If readability / legibility is the goal, does it make sense to specify a pixel size? i.e. Won't the same font display as varying numbers of pixels depending on what kind of TV it is shown on?
If ensuring readability was the concern what would be the best way to specify the font size? A fraction of the total frame? Or something like
"....to show up as at least 12 pixel on a 1080 pixel display"