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RGB
1600×1200
To calculate the bandwidth for a combination of video and RGB windows or different sized windows the follo
ing formula can be used:
B = res
* res
* fr * cd
x x x x
y y y y
The abbreviations have the following meaning:
•
res
, res
- resolution of the source in x- and y-direction in pixels
x
y
It is important to consider the final scaling when displayed. Up-scaling of the input sources is performed in
the O
S
therefore data is transferred 1:1 and the original resolution must be inserted into the formula.
MNI
CALER
If the source is displayed smaller than 1:1 the source is downscaled directly in the input card. Original resolu-
tion of PAL and SECAM is 720×540 pixels and of NTSC it is 600×450 pixels. This means when displaying PAL
with a scaling factor of 1/2 only a res
•
fr - frame rate
For video a frame rate of 25fps (PAL) and 30fps (NTSC) is standard. For dynamic RGB input a frame rate of 20
fps in normal cases gives an acceptable performance. If the RGB-source is mostly static even lower frame
rates can be selected.
•
cd - color depth
The O
S
displays video and RGB in the color depths 16 bpp or 32 bpp depending on the settings of the
MNI
CALER
X server, please refer to section
Together with Q
A
UAD
NALOG
400 MBps, therefore for optimal performance the amount of transferred data in one
Q
A
V
C
UAD
NALOG
IDEO
ARDS
400 MBps = 3200 Mbps = B
An O
B
equipped with B
MNI
US
100 MBps = 800 Mbps = B
It is recommended not to mix Quad Analog Video Cards and Dual RGB Input Cards with Big
Video Cards and RGB Input Cards within one system. A reduction of bus bandwidth for Quad
Analog Video Card and Dual RGB Input Card would be the result!
Barco – Argus X Terminal – DOC-3265-2 – user's manual – Revision 04 – May-2004
10/16
15/16
20/16
10/32
15/32
20/32
M is 720×540 pixels and of NTSC it is 600×450 pixels. This means when displaying PAL
/2 only a resolution of 360x270 must be considered.
4.2.2 Color capabilities of
V
C
and D
IDEO
ARD
UAL
mal performance the amount of transferred data in one O
and D
RGB I
C
UAL
NPUT
ARDS
+ B
+ B
+ ... + B
1
2
n
V
C
and RGB I
IG
IDEO
ARDS
+ B
+ ... + B
1
2
n
-
10
-
6
-
5
-
5
-
3
-
2
number of displayable video sources depending on the input card
video and RGB windows or different sized windows the follow-
C) is standard. For dynamic RGB input a frame rate of 20
Argus.
RGB I
C
one O
NPUT
ARD
MNI
must not be bigger than 400 MBps:
C
has a bandwidth of 100 MBps available:
NPUT
ARDS
________________________________________________________________________
-
-
-
-
-
-
B
provides an effective bandwidth of
US
vailable:
GB Input Cards with Big
4. Operating
>17
>17
20
20
13
10
Table 4-3
B
with
MNI
US
4-15
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