Aspect Ratio
The ratio of the width by the height on a monitor or television screen. Most TVs and monitors have a 4×3 aspect ratio–the screens are 4 units wide and 3 units high. A movie screen has an aspect ratio of 16×9 (a bit wider than 5×3), and that’s why we have letterboxed movies (when you show a movie in true form on a TV you get black boxes on the top and bottom of the screen). HDTV screens today and some monitors support 16×9 aspect ratios, but most televisions and monitors still retain the 4×3 aspect ratio.
The ratio of the width by the height on a monitor or television screen. Most TVs and monitors have a 4×3 aspect ratio–the screens are 4 units wide and 3 units high. A movie screen has an aspect ratio of 16×9 (a bit wider than 5×3), and that’s why we have letterboxed movies (when you show a movie in true form on a TV you get black boxes on the top and bottom of the screen). HDTV screens today and some monitors support 16×9 aspect ratios, but most televisions and monitors still retain the 4×3 aspect ratio.
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