Belden Grass Valley XVP-3901-DPI, Руководство по установке и эксплуатации, Страница: 33 / 87

GUIDE TO INSTALLATION AND OPERATION
XVP-3901-DPI | 27
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
format, and is measured starting from the edges of the displayed image, as shown in the following table. Masks can
cover a maximum of 25% of the active area.
Note : all masks are adjusted in steps of 2 pixels or 2 lines. Available Presets for various AFD Mode selections (16:9
output)
5.4.2 3G/HD Output – Timing tab
The Timing tab provides access to timing adjustments which
affect the signal outputs. There are two slider controls, each
with a data reporting box which shows the current value, and
into which values can be typed directly. The total delay is
reported at the top of the window.
Vertical (lines) : With this adjustment, a value ranging from –
16 to +15 lines compared to the reference or the processing
delay, may be set. This adjustment can be used in
conjunction with the horizontal timing adjustment.
Horizontal (µs): With this adjustment, a value ranging from
zero to the equivalent of 1 horizontal line in the current output
format compared to the reference or the frame boundary may
be set.
Additional Frame Delay : This parameter affects the overall processing delay of the card. It adds supplemental frame
delay to the current processing delay. This parameter will add a delay ranging from 0 to 15 interlaced frames (steps of
33 ms in 59.94 Hz and 40 ms in 50 Hz) to the current processing delay. Without a reference, the normal processing
delay is 1 frame. You can extend this delay up to16 frames if the additional delay is 15. With a reference, up to 15
frames can be added to the frame sync delay which depends on the timings between the input and the reference.
Note that, in order to compensate for the processing delay of a Dolby-E/Dolby Digital decoder or a Dolby-E encoder
installed on the XVP-3901-DPI or on the companion audio card, the additional frame delay must be set to at least one
(1) frame. On the other hand, if a Dolby Digital encoder is installed, the additional frame delay must be set to at least
six (6) frames for 59.94 Hz formats and at least five (5) frames for 50 Hz formats.
5.4.3 3G/HD Output – Advanced tab
The
Advanced tab provides controls over the type and level of detail enhancement that will be performed, and the
color of the mask. The panel differs between 3G/HD output and SD output
Figure 5-13 Video Output 3G/HD - Timing