EO> That's true..  I think the term 'letterboxing' might refer to widescreen
 EO> movies displayed on a 4:3 screen, but I'm not sure if there is an
 EO> official definition. And even on a widescreen TV, some widescreen movies
 EO> have black bars on the top & bottom because the movie was filmed with a
 EO> wider aspect ratio than the TV (which I think you were saying as well).

Letterboxing is when showing something wider than the screen such as 16:9 on
4:3 or cine 2.35:1 on 16:9.

Pillarboxing is when showing thing that isn't wide enough such as 4:3 on 16:9
or 16:9 on 2.35:1.

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