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What is 4:3 – (synonyms: Full Frame,Fullscreen,Academy Ratio)?

4:3 refers to an Aspect ratio (AR) with a height that’s 3/4 the width. It’s also commonly referred to as 1.33:1 or simply 1.33, in reference to the width being approximately 1.33 times the height. This AR is also commonly referred to as fullscreen, referring to the fact that video with this Aspect Ratio fills the full screen of an analog TV. Widescreen video, on the other hand, must be letterboxed, or vertically compressed to be viewed properly on a 4:3 TV, resulting in only part of the screen being used for the image.

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