GUIDE TO INSTALLATION AND OPERATION
XVP-3901 |
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5.4.1 3G/HD Output – ARC tab
Under the ARC (Aspect Ratio Conversion) tab, several sub-
sections are found allowing extended control over how the
output will be displayed. For convenience, ARC presets are
available for frequently-encountered aspect ratio
conversions.
•
These controls are disabled when the ARC Mode
pulldown on the Input Screen is set to
Auto
or
Forced
You can configure the ARC parameters differently for an SD
input than for a 3G/HD input. The card will remember the
different parameters and will load them automatically without
user intervention based on whether the video input is SD or
3G/HD. Ensure the card has a video signal of the desired
format before changing the configuration.
When using manual aspect ratio mode (AFD mode is 4:3 or
16:9), the card will remember automatically all the
parameters for the different combinations of input/output
aspect ratio conversions (see the combinations below). This means you can configure the card once for each type of
conversion and then the card will restore the configuration automatically when the proper input format and
input/output aspect ratio is encountered.
•
SD 4:3 to 3G/HD 16:9
•
SD 16:9 to 3G/HD 16:9
•
3G/HD 16:9 to 3G/HD 16:9
5.4.1.1 Input sub-section
Input: Crop – Horizontal and Vertical
The crop controls allow selection of a portion of the original image – the amount of horizontal and vertical cropping is
expressed as a percentage of the size of the original image.
The user can manually adjust the level of horizontal and vertical cropping. Horizontal cropping is done on an 8-pixel
basis. Vertical cropping is done on 4-line basis. To achieve non-symmetrical vertical or horizontal cropping, uncheck
the
Center
box underneath and position the image using the
Tilt
function described below.
Input cropping changes the scaling factor between the input and the output. If we crop the input (H&V) by 10%, the
output image is resized and scaled by +10%. By providing different H and V cropping, the user can produce an
anamorphic image.
The padlock icon appearing next to the data window allows the data to be “locked”. See the paragraph
Locking
controls
under
Output sub-section
below for a discussion of this option.
Input: Tilt
Once a smaller window has been established by cropping the input signal, it can be moved vertically (
Tilt
, expressed
in lines) within the original image to place the desired portion of the image in view. By default, a
Center
check box
beneath the Tilt scroll box forces the cropping window to be centered on the input window. When it is checked, the
necessary Tilt value will be calculated and displayed in the Tilt data window. You cannot tilt if the cropping value is
zero.
Figure 5.12 Video Output 3G/HD - ARC tab