Ross Vision - Video Layering

Vision Operator’s Manual (v12.0 MD) Switcher Basics • Ops 4–3
Figure 4.2 Frame — Video Routing
All the video signals are routed to the Video Input with Crosspoint Board. The video signals
can include Global-Store images from the Frame CPU Board and the MLE-Store images from
the XFX Card on the Video Processor Board. Depending on what is selected on the crosspoint
buses of the switcher, the video signals are routed to the Video Processor Board to be mixed for
a transition, or keyed. If a Squeeze & Tease effect is selected, the video signals will be routed to
the Squeeze & Tease Carrier Board. After all the video has been manipulated, it is sent back
through the Video Input with Crosspoint Board to be routed to the required output on the Video
Output Board. All this happens in real-time.
For More Information...
• on video routing, refer to the section “Video Routing” on page Eng 2-19.
Video Layering
How video is layered in the output of the Vision switcher depends on how each MLE is re-entered
onto the other, and what keyers are on-air for the MLE. If we assume that each MLE has all
keyers on-air, and that each MLE is re-entered into the MLE below, the layering will start with
MLE 1 Background and progress to MLE 4 Keyer 4 (Figure 4.3).
Figure 4.3 Video Layering (4-Keyer, 8-MLE Shown)
Note — Re-entry chains of more than 4 MLEs can cause line drops. Any combination of MLEs
can be re-entered safely, as long as there are less than 5 MLEs in the chain.
The priority of the MLEs on the switcher, or how they are layered, can be altered by changing
how the MLEs are re-entered on the switcher. For example, if MLE 3 is re-entered into MLE 1,
then MLE 3 will appear behind MLE 1 in the video layering.
Video Input
/Crosspoint
Board
Video
Processor
Board
Frame CPU
Board
Squeeze &
Tease Carrier
Board
Video Output
Board
Video Input 1
Video Input 2
Video Input 3
Program Out
Preview Out
MLE1 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4
MLE2 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4
MLE3 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4
MLE4 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4
MLE5 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4
MLE6 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4
MLE7 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4
MLE8 Background
Keyer 1
Keyer 2
Keyer 3
Keyer 4