Aspect ratio measures the relationship between the width and height of a display, sensor, or image. A common aspect ratio is 16:9, which means it's 16 units wide and 9 units high. There are many ...

Back in the day (until around 2003), every PC display was produced in the almost-square 4:3 aspect ratio. Not coincidentally, that’s the same aspect ratio of old-school TVs. At the time, when ...