Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 71)

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Imagestore 750
User Manual
Defines whether the assigned keyer of the Imagestore 750 is cut up automatically when
there is some keyer activity on the co-processor layers.
• Setup > Slave > Keyer Follow Down
Defines whether the assigned keyer of the Imagestore 750 is cut down automatically when
there is no keyer activity on the co-processor layers.
• Setup > Slave > Fill&Key Input
Determines which external fill and key pair is routed to the assigned keyer for automatic
keyer management.
The status of the co-processor layers controlled by command forwarding can be monitored
from the Setup > Slave > Keyer Status front panel menu.
 Note: Automatic keyer management works correctly only when used in conjunction with
command forwarding. This is because the Imagestore 750 maintains the layer status
(including keyer arm states) of the graphics co-processor based on the automation
commands it forwards to the co-processor and the tallies that it receives from the co-
processor as the status of its layers changes. The Imagestore 750 always uses tallies from the
co-processor to determine exactly when slave layers cut down because they often contain
out-transitions of indeterminate duration.
In the master control environment, we recommend that ‘Keyer Follow Up’ be disabled so that
Intuition XG graphics can be previewed by iMC panel users without automatically appearing on-
air. Automation then must be responsible for cutting up the appropriate assigned DSK with
Intuition XG layers.
Example
Following is an example of automation cutting up two layers on a graphics co-processor by
using command forwarding through an Imagestore 750 with the following settings:
1 Cut up one co-processor layer ‘34 1’.
The Imagestore 750 maps the command ‘34 1’ to ‘30 1’ and forwards it to the co-processor.
The co-processor cuts up its first layer.
The Imagestore 750 performs ‘Load Live’ on DSK 1 using Fill-1/Key-1.
The Imagestore 750 cuts up its own DSK 1.
The co-processor output is now visible.
2 Cut up another co-processor layer ‘36 1’.
The Imagestore 750 maps the command ‘36 1’ to ‘32 1’ and forwards it to the co-processor.
The co-processor cuts up its third layer.
The Imagestore 750 does nothing with its own keying layers.
3 Cut down one of the co-processor layers ‘34 0’.
The Imagestore 750 maps the command ‘34 0’ to ‘30 0’ and forwards it to the co-processor.
Default Keyer Assign DSK 1 (which is initially cut down)
Keyer Follow Up Enabled
Keyer Follow Down Enabled
Fill & Key Input Fill-1/Key-1