Definition of - Aspect Ratio

Aspect Ratio

Aspect ratio looks at picture sizes and how the ratio of the width compares to the height. In HDTV sets and PC monitors the aspect ratio's are generally 4:3 and 16:9. Movies are generally in the 16:9 aspect and when shown on a TV result in a letterbox effect showing black bars at top and bottom.

See also, widescreen

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