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Roadie HD+35K User Manual
020-100340-02 Rev. 1 (01-2010)
Section 2: Installation and Setup
Although image size and aspect ratio can be adjusted using projector software, it is still ideal to use a screen
with an aspect ratio that closely matches your likely source material. You can then more easily fill the screen
with the image without restricting either image size or content. For example, standard video from a VCR has a
4:3 ratio (approximately) and can fill a 4:3 screen without side-to-side stretching, whereas a high-definition
signal with a 16:9 aspect is largest on a 16:9 screen.
Figure 2-7 Aspect Ratios: Image vs. Screens
As shown in
Figure 2-7
, an obvious mismatch between source material and screen is characterized by "black
bars" on both sides of the image (if the screen is wider than the source material) or above and below the image
(if the source material is wider-typically called a letterbox display).
Alternatively, if the area of unused pixels is considered minimal, you may prefer to use the projector's software
control to slightly stretch the image either horizontally or vertically-enough to utilize the remaining pixels
while not noticeably distorting the image.
Using a Cinema "Flat" Screen (1.85 aspect ratio)
By default, source signals closely matching the projector's 2048 x 1080 display area will fill this area
accordingly. Signals with lower aspect ratios will automatically scale to be as large as possible while
maintaining their original aspect ratio. For details on resizing behavior, refer to
Section 3.6.3 Image Settings
Menu
.
Table 2.2 Typical Aspect Ratios
Application
Aspect Ratio
SXGA
1.25 (5:4)
35mm filmstrip
1.32 (4:3)
NTSC Video/XGA
1.33 (4:3)
PAL Video/XGA
1.33 (4:3)
HDTV Video
1.78 (16:9)
Letterbox Video/”Flat”
1.85 (2048 x 1080)
Roadie Native Resolution
1.89 (2048 x 1080)
Cinemascope
2.35
Image edge
Screen edge
Screen edge
Image edge
on
16:9 screen
5:4 image
on
5:4 screen
16:9 image
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