GUIDE TO INSTALLATION AND OPERATION
30
| XVP-3901
5.4.1.3 Presets
sub-section
For convenience in manual operation, several of the most common conversion situations are pre-programmed into the
XVP-3901, and can be quickly accessed. The available Presets change according to the AFD mode and Output
Format selections made using the pulldowns on the input and output screens.
The chart in Figure 5.12 illustrates graphically the effect of each preset on the input image.
•
Only those presets for which an
output is shown will appear on the
Video Output panel.
•
For example, when the input and
output formats are the same, only
the
Bypass
button will appear
•
In all cases, a button labeled
Custom
will appear, and will be
selected whenever the parameter
settings do not correspond exactly
to one of the available presets
The advantage of using Presets is to
provide a unique conversion without
having to specify the H&V scaling
factor or the percentage of
cropping/side panels and
anamorphism. When an ARC Preset
is selected, it re-centers the output
picture in case of side panels or
letterbox, but it does not affect the
output masks.
5.4.1.4 Masks
sub-section
Mask: Horizontal and Vertical
Sometimes with aspect ratio
conversion, some of the edges of the
original image are exposed in the
output signal. Often, there will be
artifacts in the source along these
edges, extending for several lines
vertically or several pixels horizontally
after conversions. Masks are
adjustable “curtains” which can be
used to frame the output image,
covering up the edge artifacts and
leaving a clean transition from image
to mask.
Four scroll boxes with data windows for reporting and direct data entry are used to set the mask position on the four
sides of the output image. Top and bottom position are set in lines, while left and right position are set in pixels.
Masks should be adjusted by viewing the output on a video monitor and positioning the masks to cover edge effects
with a minimum loss of clean picture content. Usually masks are the final adjustment to be made. The masking is
shown on the top right Output screen by graying out the masked portion. Note that mask – or Background - color may
be changed in the
Advanced
tab. The maximum amount of masking that can be introduced depends on the image
Output Format 16:9
Input
Format
(selected by AFD Mode pulldown)
4:3
16:9
Presets
Output after ARC processing
Figure 5.12
Available Presets for various AFD Mode selections
(16:9 output)
