102 ____________________________________________________Barco - RHDM-2301 - User manual
Terminology
Opto-Electric Transfer Function (OETF)
The opto-electric transfer function is a power function that defines the display luminance
as function of the input signal level.
On Screen Display (OSD) menu
Menu which appears on the screen by pressing the button
that allows additional
administrative settings of the display unit.
Overscan
The size of the image is cropped to 96% compared to the native image and subsequently
stretched to be displayed on the same screen area.
Pan & Zoom
Viewing setting of the display that shows both video signals selected by window 1 and
window 2 next to each other in native format. The video signal is (in most cases)
cropped. It is possible to pan the image and to zoom in on the image.
Picture
!
The picture control is similar to the contrast setting on a CRT display unit. Picture drives
the power of the backlights in the display unit. It acts as a multiplication factor of the
luminance at each grey level, and is thus similar to gain or contrast. Not only the white
level, but also the black level is affected when the picture is adjusted. The value of the
picture is expressed in cd/m
2
for 100% video signal.
Figure 54: Picture control
Pixel Map
The input signal is mapped to the LCD screen 1:1.
Pixel shape (resizer setting)
LCD panel pixels are square. To represent an image on an LCD panel, the original image
needs to be sampled with a certain spatial resolution. This results in a collection of values
which are taken from a ”point” in the image, and mapped to the LCD panel pixels. The
square form of the LCD panel pixel can introduce pixel shape artefacts in the image. A
setting in the “resizer settings” OSD menu is available to correct these type of artefacts.
Video signal
Black
0 %
White
100 %
Black
offset
80 cd/m²
100 cd/m²
50 cd/m²
+ 20
- 30
Luminance
