Letterbox Display - Crestron UPX-2 Operation Manual

Crestron UPX-2 Universal Presentation Processor
Figure 2. 16:9 Aspect Ratio
The UPX-2 supports 4:3 and 16:9 and can support other aspect ratios such as 15:9
using the custom output setting.
The UPX-2 can allow the simultaneous display of multiple formats. For example,
displaying a 4:3 image on a 16:9 plasma screen appears without image distortion. It
appears with black on the sides of the image, rather than top and bottom as in

letterbox display.

Figure 3. 4:3 Aspect Ratio Displayed on a 16:9 Display
4:3 Aspect Ratio on
a 16:9 Display
The UPX-2 displays a true 16:9 aspect ratio. The 16:9 aspect ratio is full screen; the
image fills the screen from edge to edge.
Letterbox Display
A letterbox image is scaled to fit within another aspect ratio, usually the standard
television format of 4:3, and has reduced vertical resolution.
NOTE: Letterbox (a 1.85 aspect ratio designed to fit within a 4:3 frame) and HDTV
16:9 (1.78) are not the same.
82 ¥ Universal Presentation Processor: UPX-2 Operations Guide – DOC. 6276B