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4. Operating
Barco – Argus X Terminal – DOC-3265-2 – user's manual – Revision 06 – February-2005
___________________________________________________________________
4-14
Amount of video and RGB windows
The number of video and RGB data that can be processed in one A
RGUS
O
MNI
B
US
underlies the bandwidth avail-
able on the O
MNI
B
US
. These are 400 MBps. The following table gives an overview about the bandwidth required
for some standard window sizes. In the last column there is in addition the value of maximal windows of that
type. This value is valid if only windows with the specified properties are displayed.
type
number of
pixels
frame rate
[fps]
color depth
[bpp]
bandwidth [MBps]
1:1 or higher / (2:1)
max. amount of windows
1:1 or higher / (2:1)
Sources of Quad Analog Video Card and Streaming Video Card
NTSC
640×480
30
16
19 / (5)
21 / (>68)
PAL/SECAM
720×540
25
16
20 / (5)
20 / (>68)
Sources of Dual RGB Input Card
XGA
1024×768
10
16
16 / (4)
25 / (> 34)
XGA
1024×768
15
16
24 / (6)
16 / (> 34)
XGA
1024×768
20
16
32 / (8)
12 / (> 34)
SXGA
1280×1024
10
16
27 / (7)
15 / (> 34)
SXGA
1280×1024
15
16
40 / (10)
10 / (> 34)
SXGA
1280×1024
20
16
53 / (14)
7 /
(30)
UXGA
1600×1200
10
16
39 / (10)
10 / (>34)
UXGA
1600×1200
15
16
58 / (15)
6 /
(27)
UXGA
1600×1200
20
16
77 / (20)
5 /
(20)
XGA
1024×768
10
24
24 / (6)
16 / (> 34)
XGA
1024×768
15
24
36 / (9)
11 / (> 34)
XGA
1024×768
20
24
48 / (12)
8 /
(33)
SXGA
1280×1024
10
24
40 / (10)
10 / (> 34)
SXGA
1280×1024
15
24
59 / (15)
6 /
(27)
SXGA
1280×1024
20
24
79 / (20)
5 /
(20)
UXGA
1600×1200
10
24
58 / (15)
6 /
(27)
UXGA
1600×1200
15
24
87 / (22)
4 /
(18)
UXGA
1600×1200
20
24
116 /(29)
3 /
(13)
Table 4-3
size of video/RGB data and number of displayable video windows in case that only this type of video window is displayed by that O
MNI
B
US
To calculate the bandwidth for windows of different sizes or frame rates the following formula can be used:
B = res
x
xx
x
* res
y
yy
y
* fr * cd
The abbreviations have the following meaning:
•
res
x
,
res
y
– resolution of the source in x- and y-direction in pixels
It is important to consider the final scaling used to display the window. Up-scaling of the input sources is per-
formed in the O
MNI
S
CALER
therefore data is transferred 1:1 and the original resolution must be inserted into
the formula. If the source is displayed smaller than 1:1 the source is downscaled directly in the input card.
The original size of the different video types can be read from the table above.
•
fr – frame rate
For video a frame rate of 25fps (PAL/SECAM) 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.