Miranda Imagestore HDTV, User Manual, Page: 42 / 102

Front Panel Operation Imagestore HDTV User Manual
Page 42 Miranda Technologies Ltd
A FADE transition is the gradual process of switching to the selected source
with rates adjustable between 1 and 300 fields (5 seconds @ 60Hz)
Cut Keyer Up
Displays the fill/key input source of Key Layer 0 over the background video.
Cut Keyer Down
Removes the fill/key input source of Key Layer 0 from being displayed over
the background video. The background video is passed unchanged.
Set Key Parameters
Source
Self key When the source option is set to self, the key data is derived from
the luminance content (Y value) of the "Fill" signal itself.
Separate key When the source option is set to separate, the key data is
derived from the luminance content (Y value) of the separate "Key" image.
None When the source option is set to none the key for an image is set to
white so that there is no image transparency.
Type
Full Key is where the foreground image is passed only where the key signal
is present.
Linear Key is where the background and foreground are summed and the
foreground is unaffected by the key.
Sense
Normal, a black-level key signal that will cause the "Fill" image to be fully
transparent and not appear over a background. A white-level key signal will
cause the "Fill" image to be opaque with no background appearing through.
Intermediate keying levels will produce a pro-rata transparency effect.
Invert reverses this effect and white-level key signals now create a fully
transparent "Fill" image with black-level signals producing an opaque "Fill"
image.