Sony MVS-8000 User Manual page 140

Front Input: When this is on, the front image of the input video signal is
treated as shaped video.
Back Input: When this is on, the back image of the input video signal is
treated as shaped video.
Output: When this is on, the output video signal is treated as shaped video.
About on and off for shaped video input (Front Input/Back Input)
Switch shaped video on and off according to the input video signals.
For example, switch the shaped video input on when the input signal is a key
processed image such as computer graphics.
Switch the shaped video input off when the input signal is not key processed,
for example when a video signal taken with a camera is cut out with a title or
other key signal.
About on and off for shaped video output
Switch the shaped video output on and off to match the on and off state of the
switcher clean video mode.
Also, when the shaped video output is on, it is recommended that the switcher
key type be set to linear key.
About the relationship between shaped video output and effects
When the shaped video output is off, the video signal before key processing is
output. According to the selected effect, the following states may result.
(a) The output video signal is affected by the key signal.
(b) When key processing is done, a different image may appear in the parts
which are removed.
(c) There is no change in the output video signal for effects which are applied
to key signals only.
When multiple effects are applied, the order of priority is (a) > (b) > (c).
The following explains the relationship between effects and states (a), (b), and
(c).
(a) The output video signal is affected by the key signal
The output video signal is affected by the key signal when the following effects
are selected. To prevent the signal from being affected, set the DME key source
to Int Key, or choose an appropriate input key signal.
Page Turn, Roll, Cylinder, Sphere, Spotlighting, global effects (Combiner,
Brick, Shadow)
DME Special Effect Operations
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