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LED-PRO • User’s Guide
4. Operation
Using the Expert Mode Menu
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From the
Input Setup Menu
, select
Aspect Ratio
to display the
Input Aspect Ratio
Menu
. This menu enables you to set the input source’s aspect ratio to a predefined or
custom ratio. LED-PRO selects and displays the source’s aspect ratio according to the
input format detected.
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Computer video at 1280x1024@60Hz defaults to 5:4.
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NTSC video default to 4:3.
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HDTV1080i video defaults to 16:9.
The figure below illustrates the
Input Aspect Ratio Menu
:
Figure 4-59.
Input Aspect Ratio Menu
Following are descriptions of each menu function:
•
Mode
— enables you to select an aspect ratio. Choices are 1:1, 3:2, 4:3, 5:4,
16:9 and Custom.
•
Ratio
— this function is only selectable when
Custom
is selected as the mode.
The ratio is a decimal number ranging from
0.750
to
3.000
. The default value
depends on the last predefined ratio selected, prior to selecting
Custom
.
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From the
Input Setup Menu
, select
Display Mode
to select one of two display modes:
•
Crop
— select this option to map the input (or a portion of the input) to the output
with no scaling (1:1). For proper results, the
Input Horizontal
and
Vertical
Actives
(size) must match the
Output Actives
. Then, using the
Vertical and
Horizontal Position
, locate the desired portion of the video to be displayed
•
Scale
— select this option to map an entire input video into the LED display.
Typically, this means that image will be down-scaled:
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1600x1200 input video mapped into an 800x600 LED display.
Note that
Input Position
adjustments may still be required.
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From the
Input Setup Menu
, select
Letterbox
to enable or disable the letterbox function:
•
Off
— the image fills the entire output raster.
•
On
— the top and bottom edges of the raster are cropped to a
16:9
ratio. This
feature is especially useful with widescreen DVDs, enabling you to process them
without seeing the black bars at the top and bottom of the image.
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