Barco - RHDM-2301 - User manual ___________________________________________________ 101
Terminology
Nr of active lines + Scanning Vertical frequency
e.g.: 720p23.98 can be translated to a format that has a resolution of 1280x720, a
progressive scan format with a vertical frequency of 23.98
Latency of the display unit
The latency is a specification of the time that is needed to convert the input signal into
light emitted from the LCD panel, expressed in milliseconds (ms). The latency shown in
the status bar is determined by the time difference between the receipt of the middle line
of the frame and the output on the screen of the middle line of the same frame. This time
already includes the latency of the LCD panel.
Lightness
Lightness (CIE L*) is the standard approximation to the perceptual response to
luminance. Lightness is obtained from a non linear transformation of luminance.
Light output
The luminance that is emitted by the display unit expressed in cd/m
2
.
Luma
Luma (Y’) is an engineering term that describes the non linear transformation of
luminance to a perceptual uniform space (not to be confused with lightness). Luma as a
weighted sum of the gamma corrected R’, G’ and B’ components.
Luminance
Luminance (Y) is a measure for the amount of light that is emitted from the LCD panel.
The units are cd/m
2
, or lm/sr.m
2
and is briefly called “nit”.
Monochrome
The function monochrome allows the user to exclude the components C
B
and C
R
from the
Y’C
B
C
R
signal that is displayed on the LCD panel. Only the luma (Y’) information is used to
display the image on the screen. The image is displayed in grey scale.
⎪
⎪
⎩
⎪
⎪
⎨
⎧
<
−
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
≤
=
n
n
n
n
Y
Y
Y
Y
Y
Y
Y
Y
L
008856
.
0
;
16
116
008856
.
0
;
3
.
903
*
3
1
