Windowboxing
From WSGFWiki
[edit] Definition
Windowboxing is when a picture is surrounded by black bars on all four sides, leaving much screen unused. It is usually the result of a letterboxed image becoming pillarboxed instead of anamorphic.
[edit] Examples
Some of the earlier widescreen DVDs, such as Robocop, Criterion Co. (pictured below), are not anamorphic. They will appear letterboxed on a 4:3 monitor and windowboxed on a widescreen monitor.
Some games with letterboxed cut-scenes, such as Age of Empires III, will appear windowboxed on widescreen monitors.
