Extron Electronics IN1408 - Manual (Page 20)

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© 2002 - INLINE, Inc. IN1408 Operation Manual - V1.4 3/21/02 12:32 PM
Key Concept
Aspect Ratio – The aspect ratio controls can be used to vary the relative image width and height.
They can be used to accommodate various input signal aspect ratios as well as output device
aspect ratios. The output aspect ratio is selected by choosing the appropriate resolution in the
output menu (see Output Modes Section on page 27).
Standard: For Standard 1.33 input signals (sometimes referred to as full
screen).
Anamorphic: This setting provides vertical image squeezing to accommodate
anamorphically enhanced DVDs.
Wide Screen: For wide screen 1.78 input signals (letterbox).
Wider Screen: For wider screen 2.35 input signals (narrow letterbox).
Expand:
Designed for wide screen (letterbox) signals viewed on 4:3 aspect
ratio displays. Expand mode zooms in on the center of the image
and crops the image vertically and horizontally so that the black
bars above and below the image are removed. In this mode, some
image is also lost on the right and left hand edges.
Most DVDs and VCRs put out a 4:3 signal. How this signal is filled with video determines its
aspect ratio. In the following examples, four different input aspect ratios are shown on the left as
they would be displayed in their native 4:3 format. The same signals are shown on the right as
they would appear on the output after scaling.
It is critical that the signal format be selected properly for each input. If the
input is not properly configured to match the input signal, the scaler will not
function properly and will either display a distorted image or no image at all.
Using the on-screen menu, operators can set / change the input signal format
at any time, even when another input is active. For example: an operator
can configure the signal format for Input 1 while the display device is
presenting a signal that is passing through Input 3. This method is required
to deselect the RGB passive signal format, since the on-screen menu cannot
be seen while in this mode. These details are discussed in the Pass-Through
RGB Video Section on page 27.