Datavideo TVS-1000 Instruction Manual page 58

A view after a Garbage mask correction with the keying algorithm switched off
After enabling the chroma keying function, the following effect is obtained.
A view after the Garbage mask correction with the keying algorithm switched on
Comments: It should be kept in mind that in this case the object may only move within the area
of the cut off mask – otherwise the object will disappear.
Furthermore, if the Garbage mask sliders are used, it is possible to check whether the previous
settings were correct and whether they had any influence on the final look of the virtual
background. By moving for instance the Left slider within its full range, no noise, colour shifts or
changes in the background grayness should be visible.
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