
GUIDE TO INSTALLATION AND OPERATION
XVP-3901-DPI |
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Note 1 – Auto mode: When Auto is selected, all the ARC values are automatically set based on the AFD flag
detected at the input, and the ARC controls and presets described below are disabled. Annex 2 shows the AFD
functions implemented. If no AFD flag is detected at the input, the card uses the Default AFD flag specified in the
AFD tab
Note 2 – Forced mode: Forced mode is useful when the input AFD flag is unreliable, missing or if the user wants a
simple way to force the aspect ratio conversion. The function is the same as the Auto mode, except that the
incoming AFD flag is ignored, and a user-specified forced flag is used instead. As in the Auto mode, the ARC
controls and presets described below are disabled.
The input screen shows how much of the input signal will appear at the output after the ARC processing in the XVP-
3901. It does so by showing any cropped portions of the image in blue.
The Output Screen
The output screen shows the final result of the ARC processing.
•
The side panels and letterbox regions are shown in the selected background color
•
The masks are shown in Gray
3G/HD output – A pull-down menu is at the bottom of the screen displays the format of the video output which fixed
according to the input video format according to the chart in Section 1.3. This value cannot be changed.
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. Note that limited
presets are available as input video format is limited to
HD/3D in the XVP-3901-DPI which the same aspect
ratio than the video output.
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.
Figure 5-12 Video Output 3G/HD - ARC tab
Summary of Contents for Grass Valley XVP-3901-DPI
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