Barco LED-PRO, Руководство пользователя

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76 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:
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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:
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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
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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:
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Off — the image fills the entire output raster.
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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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