Underscan

A video or computer image reduced so that all four edges are visible on-screen, leaving it surrounded by black borders.

The opposite of overscan. In underscan, a video or computer image is reduced so that all four edges are visible on-screen, leaving it surrounded by black borders. Underscan is used to show what is happening in the blanking period and at the beginning and end of scan lines and frames. Underscanning can uncover latent image problems for identification and correction.

Last modified on September 1, 2019, 1:40 am
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