The width-to-height ratio of a picture or video frame. TV broadcasts at a 4:3 (1.33:1) aspect ratioAspect ratioThe width-to-height ratio of a picture or video frame. TV broadcasts at a 4:3…//read more ; digital TV will be broadcast with a 16:9 (1.78:1) ratio; and most feature films are shot in at least a 1.85:1 ratio. IMUs have an aspect ratio of 6:5 (330x 250; 336 x 280; and 180 x 150).