GUIDE TO INSTALLATION AND OPERATION
36
| XVP-3901
Film mode:
When The Film Mode selection is set to ON, the XVP-3901 monitors the input for film-based sequences
and applies the proper algorithm.
Film detection is provided for 3:2, 2:2 (59Hz and 50 Hz sources) and 5:5 sequences.
Video Over Film:
When the film mode is enabled, turn ON the Video-Over-Film (VOF) function to detect and bypass
field-merging on certain video regions such as scrolling video characters over an entire film frame, thereby preventing
any unwanted combing effects.
There is only one de-interlacer on the card. Any changes made within this tab will be copied over to the De-interlacer
tab in the Video Output (SD) panel.
5.5 Video Outputs panel – SD Output tab
This panel allows control over several aspects of the
standard definition video output:
•
aspect
ratio
conversion
•
timing
control
•
image quality processing
•
metadata
insertion.
The upper portion of the panel is occupied by two video
screen images, labelled
Input
and
Output.
These screens do
not show the actual video being processed by the XVP-
3901, but rather show graphic images that represent the
geometric aspects of the input signal and the output that
results after it is exposed to the current ARC processing
functions. The image is a green circle on a white
background; the circle is used because it is easy to see if it
is asymmetrical. Lines on the images indicate protected
areas for the AFD implementation.
Aspect Ratio Conversion (ARC) modifies the video active
picture shape as the signal is converted between SD at 4:3
aspect ratio and HD/SD at 16:9 aspect ratio. If the input is
simply stretched or squeezed to fit the output, the image will
be asymmetrically distorted; this is called
anamorphic
distortion. If the image is expanded or contracted
symmetrically, it must be cropped, and/or have new blank background segments added to it, in order to fill the output
picture. The ARC processing in the XVP-3901 allows a wide range of symmetrical and asymmetrical picture size
modification, coupled with cropping and background addition, to be applied to an input signal.
When the Input AFD Mode is set to
Auto
, all the ARC settings are set automatically according to the AFD flag (see the
table in Annex 2 beginning on page 127) and cannot be changed by the user.
•
There are some exceptions – with certain input AFD codes the masks can be customized. Each mask can be
customized for each different AFD code allowing different mask settings according to each specific code. For
certain AFD codes that are less used, the masks cannot be configured and will be de-activated.
The Input Screen
The
Input
preview screen shows the portion of the input image which will be presented at the XVP-3901 output. It has
a pull-down
AFD Mode
menu at the top left corner through which the user selects the aspect ratio of the input signal.
Available choices are: [4:3, 16:9, Auto, Forced] for SD inputs and [16:9, Auto, Forced] for HD inputs.
Figure 5.21
Video Outputs – SD Output
