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RGB
10/16
1600×1200
15/16
20/16
10/32
15/32
20/32
To calculate the bandwidth for a combination of video and RGB windows or different sized win-
dows the following formula can be used:
B = res
* res
* fr * cd
x
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
be inserted into the formula. If the source is displayed smaller than 1:1 the source is down-
scaled directly in the input card. Original resolution 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 resolution of 360x270 must be considered.
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
MNI
CALER
Together with Q
UAD
an effective bandwidth of 400 MBps, therefore for optimal performance the amount of transferred
data in one O
B
MNI
US
be bigger than 400 MBps:
400 MBps = 3200 Mbps = B
An O
B
equipped with B
MNI
US
100 MBps available:
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!
DOC-3266-2
Argus Workstation for Windows
number of displayable video windows depending on the input card
S
therefore data is transferred 1:1 and the original resolution must
MNI
CALER
supports color depths of 16 bpp or 32 bpp.
A
V
C
and D
NALOG
IDEO
ARD
with Q
A
V
UAD
NALOG
+ B
+ ... + B
1
2
n
V
C
IG
IDEO
ARDS
+ B
+ ... + B
1
2
n
December-2003
-
10
-
6
-
5
-
5
-
3
-
2
RGB I
C
UAL
NPUT
C
and D
IDEO
ARDS
UAL
and RGB I
C
NPUT
-
>17
-
>17
-
20
-
20
-
13
-
10
Table 4-2
one O
B
provides
ARD
MNI
US
RGB I
C
must not
NPUT
ARDS
has a bandwidth of
ARDS
4-4
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