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KayakDD - Digital Production Switcher
2.9.5
Other Wipe Pattern Generator Uses
2.9.6
Preset Black
2.9.7
Fade to Black
2.9.8
Transition Rate
2.9.9
Flip Flop Background Buses
User Manual
Wipe pattern generator circuitry can be used for purposes that do not involve
transitions. Each KayakDD M/E has the two complex wipe pattern generators
described above, and each of its four Keyers also has a simple pattern generator and
a box pattern generator, making a total of six wipe generators. These pattern
generators can also be used for Preset Pattern, Masking, and Matte Washes.
Preset Black is a special type of transition, where the picture transitions to black, and
then transitions out of black to the new picture. Preset Black is really two transitions,
one to and one from black, and so requires two operator commands to complete.
Preset Black can be used with any transition type (cut, mix, or wipe). The entire picture
goes to black, even if all the transition elements involved in the picture were not
selected.
The Fade to Black control in the DSK allows the Program output of the switcher to be
brought down to black at a predetermined transition rate.
Cut transitions are instantaneous, but mix and wipe transitions have durations.
Transition durations can be set in advance to a specific transition rate, and be initiated
by pressing a button the control panel. It is also possible to manually control transitions
using a lever arm.
On the KayakDD system, one transition rate can be assigned to the main transition of
the M/E. This type of transition can be controlled by that M/E's lever arm. Each of the
four keyers on the M/E can also be assigned its own transition rate, initiated with a
separate Key Mix button.
At the completion of a transition, the background buses swap their source selections
(flip flop). This makes the upper bus always act as the on-air bus, and the lower bus
act as a preset bus. The operator can reliably setup the next source on the lower bus
without disturbing the source selected on the on-air upper bus.
For example, if a transition begins with source 1 on Background A and goes to source
2 on Background B, as soon at the transition to source 2 completes, source 2 will be
taken to the Background A bus (without disturbing the output of the M/E). The source 1
selection will also be immediately taken to the Background B bus.
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