VWC-44
12
5.2
Case C: High resolution Edge Blending with multi-windows display card
a.
Usually, each full HD signal can feed up to 3- 4x projectors for 10m screen and still keep acceptable
video quality (it will also depend on the watching distance).
b.
Many video cards can easily provide upto 4x 3840x1080 outputs for
VWC-44
c.
Each PC output is fed into one
VWC-44
, then to two projectors. 4 outputs will be fed to 8 projectors.
d.
If the overlap pixels is 250, then it can provide a video wall with 13,610x1080 output resolutions.
e.
If the watching distance is 5m, the video pixel pitch can be about 5mm. In this case, the total screen
size can be up to 13610x5mm=68m and still keep acceptable video quality.
f.
The display card should have the function to set overlapped pixels between two output ports. In the
case of four output display card, PC should be able to set overlapped pixels between output P2/P3,
P4/P5 and P6/P7. The overlapped pixels should be up to about 20%-25% of the output resolution.
The
rest overlap areas (P1/P2, P3/P4, P5/P6, P7/P8) can be set by
AV-BOX
.
g.
If the display card doesn’t have above mentioned overlap setting function, then user needs to create a
content with some overlapped pixels up to about 20%-25% between outputs.
h.
AV-BOX
can do geometry alignment, split the image, assign image for each projector and capture
the
right size of the image for edge blending.
i.
If one output can be connected to two
VWC-44
through daisy chain connection, one 3840x1080
output
can be connected to 4 projectors and total projectors will become 16. If one PC output can
be daisy
chain connection to 3x
VWC-44
, then 4 output will connect up to 24 projectors and the total
video wall
can be more than 50m and still with good video quality.
j.
The advantage for this kind of application is high output resolution. However, it still has some
limitations.
The major input source shall come from PC but not from multiple input sources
The PC shall have enough processing power to handle multiple output windows. More video
output ports from display card will occupy more PC resource.
Different playing contents may also require different CPU resource. User needs to test before
