Tvone Eclipse CS-450, Руководство пользователя

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The following table should help to explain the difference between these four modes of
operation.
Overlay mode Description Effect of fade
PC Out Outputs only the computer image. Video input is
ignored. Fades computer
image to black level.
Genlock Outputs only the computer image. All sync,
subcarrier and video levels are generated by the
scan converter, but locked to the video input.
This allows use in situations where a TV or video
monitor should be 'in-sync' with other equipment. Fades computer
image to black level.
Overlay Overlays computer image on top of video input,
based on Key Level and Keyer setting. Sync and
subcarrier signals are direct from the video input
(i.e. unit does not re-generate them). Fades computer
overlay image out, to
reveal video input
behind it.
Mix Overlays whole computer image (even black
areas) on top of video input. Sync and subcarrier
signals are direct from the video input (i.e. unit
does not re-generate them). Fades completely
between computer
image and video
input.
Overlay mode function
This is the most complex to understand, but in general:
The color content of a computer graphic pixel is ignored - the luminance is of sole
importance. White is the brightest (highest luminance), followed by yellow, cyan,
green, magenta, red, blue (and black).
Colors much brighter in luminance that the Key Level are overlaid - i.e. they
replace the video background.
Colors slightly above the Key Level are slightly transparent.
Colors at the Key Level are blended approximately 50% with the video
background.
Colors slightly below the Key Level are more transparent.
Colors well below the Key Level are not displayed at all.
The level at which colors become opaque or transparent is set by the Keyer value
(V.Soft / Soft / Normal / Hard).
With a Hard Keyer setting, color luminances do not have to be much higher or
lower than the Key Level to become fully overlaid or not displayed at all.
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