7800/7700 MultiFrame Manual
7812UDXD Series 3G/HD Up/Down/Cross Converter with Simultaneous Dual Format Outputs and AES I/O
Page - 80
Revision 1.1.1
6.23.3.2. User Aspect Ratio Setting
There are four registers for each input video standard that set the portion of the input picture that will be
converted. These register settings do not have any effect when the pre-defined aspect ratios are used.
Input H Start/ Input H
Stop:
The
Input H Start
and
Input H Stop
define the horizontal portion of the
input image to process to the output raster.
Input V Start/ Input V
Stop:
The
Input V Start
and
Input V Stop
define the vertical portion of the
input image to process to the output raster.
When operating with
User Defined
aspect ratio conversions, there are four registers for each output video
standard that defines the size of the output image and how to place the resulting image on the output
video raster.
Output H Start/ Output
H Stop:
The
Output H Start
and
Output H Stop
define how to scale the cropped
input image horizontally and where to position it horizontally on the
output raster. The image will be stretched to fill the width. (i.e. For
1080i the range of values are 0 to 1919. The range of values for 720p
output is 0 to 1279).
Output V Start/ Output V
Stop:
The
Output V Start
and
Output V Stop
define how to scale the cropped
input image vertically and where to position it vertically on the output
raster. The image will be stretched to fill the height. (i.e. For 1080i, the
range of values are 0 to 539. The range of values for 720p output is 0
to 719).
6.24. NOISE CONTROL TAB
The
Noise Control
tab is used to configure parameters associated with the video noise reduction
processing. There are three different types of noise reduction supported in the 7812UDXD series products
including
Mosquito Noise Reduction
(MNR),
Block Artifact Reduction
(BAR) and
General Noise Reduction
.
The
General Noise Reduction
section is a motion adaptive spatial-temporal and recursive noise filter.
Figure 6-30: Noise Control Tab
6.24.1. Noise Reduction Levels
The
General Noise Reduction
, the
BAR noise reducer
and the
MNR noise reducer
all have the same
controls;
Bar Level
, and the
MNR Level
. For the sake of brevity, only the
General Noise Reducer
will be
discussed in this manual.
