DISCAS (Display Image Size for 2D Content in Audiovisual Systems) is an AVIXA standard (ANSI/AVIXA V202.01) that provides a method for determining appropriate display image size based on the farthest viewer's distance and the type of content being viewed.
DISCAS distinguishes Analytical Decision Making — content viewers must read in detail, like spreadsheets — from Basic Decision Making, where viewers only need to recognize what is shown. AVIXA describes a viewing ratio calculated as the farthest viewer distance divided by image height, and publishes free calculators based on the standard.
Where this matters: AV system design — see how AV Company New York applies this in real New York projects.
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Defined by Gerson Carrillo, Director of Professional Services, D.I.S.T. · Last reviewed · Editorial policy