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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 72
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
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
supports color depths of 16 bpp or 32 bpp.
MNI
CALER
Together with Q
A
UAD
NALOG
effective bandwidth of 400 MBps, therefore for optimal performance the amount of transferred data in one
O
B
with Q
A
MNI
US
UAD
NALOG
400 MBps: :
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, Streaming 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, Streaming Video Card and Dual RGB Input Card
would be the result!
Barco – Argus Workstation for Windows – DOC-3266-2 – Revision 06 – April 2004
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.
V
C
, S
IDEO
ARD
TREAMING
V
C
, S
IDEO
ARDS
TREAMING
+ B
+ B
+ ... + B
1
2
n
V
C
and RGB I
IG
IDEO
ARDS
+ B
+ ... + B
1
2
n
video and RGB windows or different sized windows the follow-
C) is standard. For dynamic RGB input a frame rate of 20
V
C
and D
RGB I
IDEO
ARD
UAL
V
C
and D
RGB I
IDEO
ARDS
UAL
C
has a bandwidth of 100 MBps available:
NPUT
ARDS
__________________________________________________________________________
C
one O
B
NPUT
ARD
MNI
US
C
must not be bigger than
NPUT
ARDS
4. Operating
provides an
4-4
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