36 ImagePRO-II • User’s Guide
4. Menu Orientation
Configuring Inputs
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1:1 Sample sets the sampling mode for the selected input. This option is either On or Off.
You can turn this option Off only for RGB and YP
b
P
r
analog inputs. For all other input
types, the sampling clock is inherently 1:1.
Image sampling occurs when an analog image is digitized, changing the analog signals
(Red, Green, and Blue, for example) into pixels stored in the ImagePRO-II’s image
memory. Using 1:1 sampling, the ImagePRO-II samples the analog video at exactly the
same rate as that of the original signal.
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The input Aspect Ratio Submenu, shown in the following illustration, provides one way to
affect aspect ratio. The ImagePRO-II selects and displays the input video aspect ratio
according to the selected input format.
Figure 4-3. The Aspect Ratio Submenu
The settings on this menu can be overridden by the input horizontal and vertical Zoom
settings. If you override the settings, this menu may not display the input’s actual aspect
ratio.
To select the Aspect Ratio Submenu from the Input Menu, scroll to Aspect Ratio and
press SEL. Then scroll to one of the following options:
• Set Mode — The Set Mode value is one of the following: 1:1, 3:2, 5:4, 16:9, or
Custom. The ImagePRO-II detects the input format, and displays the appropriate
aspect ratio.
Example: Computer video at 1280x1024 @ 60 Hz defaults to 5:4.
Example: NTSC video defaults to 4:3.
Example: HDTV1080i video defaults to 16:9.
• Ratio — This option is available only when Set Mode is set to Custom. It is a
decimal number ranging from 0.750 to 3.000.
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The Sizing Adjust Submenu lets you:
• Scale the selected input video up (or down) within the current active area.
• Mask (crop) an image, either one edge at a time, or by using preset masks of all
four edges to achieve a specific aspect ratio.
As you adjust sizing, the top and bottom portions of an image may fall outside of the raster,
for example, when a 4:3 image is scaled up to 16:9.
INPUT ASPECT RATIO
Set Mode 5:4
Ratio n/a
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