aspect ratio

picture tube aspect ratios for SDTV and HDTV Since some of the picture information flows off the top, sides, and bottom of a television screen, the safe action area (A) is actually 90 percent of the transmitted picture. The safe title area (B) is the 80 percent of the transmitted picture that is assumed not to be hidden behind the decorative mask around the receiver tube.

aspect ratio, when describing the visible field of an image, such as a motion picture screen, a computer display, or a television, the aspect ratio is the ratio of image width to image height.

This article was most recently revised and updated by Michael Ray.
Citation Information
Article Title: aspect ratio
Website Name: Encyclopaedia Britannica
Publisher: Encyclopaedia Britannica, Inc.
Date Published: 15 February 2025
Access Date: February 22, 2025