evertz 7700 - Setting the Key Gain; Setting the Key Offset; Setting the Key Threshold; Setting the Auto Key Enable

7700 Multiframe Manual
7725DSK-LG / 7725DSK-LG-HD HD/SD Logo Inserter & Media Keyer
VLPRO OPERATION Revision 1.4 Page 3-13
3.6.1.2. Setting the Key Gain
This option is used to modify the opacity (transparency) of the keyed object used in input key mode.
The default Key Gain value of 100 will leave the transparency of the keyed object unmodified from that
defined by the key signal. Lowering the Key Gain value will reduce the opacity of the keyed object (i.e.
make it more transparent). Increasing the Key Gain value will increase the opacity of the keyed object
(i.e. make it less transparent).
3.6.1.3. Setting the Key Offset
This option is used to modify the key offset value used in input key mode. This value is the level that
will be considered as black on the key input, and should not normally be changed from its default value
of 0.
3.6.1.4. Setting the Key Threshold
This option is used to modify the threshold value used in Self Key mode. The Self Key is a hard key
based on the luminance value of the fill signal applied to the FILL video input. All luminance values
that are above the Key Threshold will be keyed from the Fill signal. All values from the key that fall
below the Key Threshold will be keyed from the background video.
The default value for the Key Threshold is 4, which is black.
3.6.1.5. Setting the Auto Key Enable
Some automation systems do not create a distinction between the Media layer (used for keying logos)
and the Downstream Keyer layers. This control is provided to prevent the automation from turning the
Media layer on and off at the same time as the DSK layers. Verify the functionality of your automation
system before changing this menu item.