100 ____________________________________________________Barco - RHDM-2301 - User manual
Terminology
background is set too high. Clipping in the lowlights can occur when the background is set
too low.
Color working space
The color space is the full range of all different colors that are observable by humans. The
color space is determined by the tristimulus variables X, Y and Z or with corresponding R,
G and B values. The color space is often represented in a CIE[x,y] 2-dimensional
chromaticity diagram.
Color sub-sampling (chroma sub-sampling)
Color sub-sampling refers to the number of bits that are available to represent the Luma
and the Chroma of each pixel in 2x2 array. The notation 4:2:2 means that of the 2x2
pixels, each has a different Luma sample (4 samples), and that C
b
(C
r
) samples are the
same two by two (the C
b
and C
r
value changes every two pixels).
Gamut
The gamut is a set of colors in the X,Y,Z color space that can be generated by the display
unit. In the 2-dimensional x,y section, the gamut consists of all colors within a triangle
defined by the three primaries (red, green and blue).
Headroom
The headroom is defined as the region of the signal input code that exceeds the value of
reference white. For 10 bit signals, the headroom is defined between level 940 and level
1019.
Hue
$
The hue control is similar to the hue setting on a CRT display unit. Hue affects the C
B
and
C
R
components of the Y’C
B
C
R
according to the following formula:
The value of the hue control is expressed in degrees.
Figure 53: Hue and saturation control
Input signal description
The names of the input signals that are shown in the status bar or in the “select input”
toolbox are composed in the following way:
1
2
'
)
cos(
)
sin(
0
)
sin(
)
cos(
0
0
0
1
'
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎣
⎡
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎣
⎡
−
=
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎣
⎡
R
B
R
B
C
C
Y
C
C
Y
α
α
α
α
C
Saturation
Y'
Hue
B
C
R
