Performing An Upstream Luma/Linear Key - Blackmagic Design ATEM Mini Manuel D'installation Et D'utilisation

Performing an Upstream Luma/Linear Key

Since luma and linear keys use the same parameters, they are set up on the software control
panel and broadcast panel using a common menu, called the luma key menu. What defines the
key as being either luma or linear is in the selection of fill and key sources. In a luma key, fill and
key sources are the same. For a linear key, fill and key sources are different.
To set up a luma/linear key on the upstream keyer in ATEM Software Control:
1 Expand the upstream key 1 palette and select luma tab.
2 Select the fill source and key source.
If performing a luma key, select the same source for both fill and key.
Adjust the key parameters to refine the key. For a description of luma key parameters, refer to
the table below.
Select sections of the Palette you wish
to reset from the reset menu
Upstream key luma/linear key parameters:
Mask
Pre-Mult
Clip
Gain
Invert Key
Flying Key
Enables a rectangular mask that can then be adjusted using the top,
bottom, left and right parameters.
Identifies the key signal as a pre-multiplied key.
The clip level adjusts the threshold at which the key cuts its hole.
Decreasing the clip level reveals more of the background. If the
background video is completely black then the clip value is too low.
The gain adjustment electronically modifies the angle between on and
off thereby softening the edges of the key. Adjust the gain value until
the edge softness is desirable but the background video luminance or
brightness is not affected.
Inverts the key signal.
Enables/disables DVE effects.
Keying using ATEM Mini 92