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Aspect Ratio

Audio/Video Glossary - Aspect RatioThe ratio between the width and height of the TV picture on the screen. In a normal TV set or monitor the aspect ratio is 4 to 3 (4:3). The new aspect ratio in HDTV* and IDTV/EDTV* is 16:9 which resembles the aspect ratio in a movie theatre (Widescreen). New TV systems support both 4:3 and 16:9 aspect ratios (PAL PLUS*) and can automatically switch between them.