Matrox Electronic Systems Matrox RT.X2 - Manual (Page 163)

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Before you start rendering
particular codec, they are also set for the other codecs that support those
options.
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Standard Renders video using standard broadcast luminance levels.
Super black and super white luminance levels are clipped.
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DV-compliant Renders video using luminance levels appropriate for DV
material. This ensures that the super white luminance levels of your video
are retained.
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Expanded Renders video using the full range of luminance levels. Super
black and super white luminance levels are retained. You may want to use
this setting, for example, to render material on which you’ll be applying
luminance key effects.
¡ Important When rendering RGB graphics, selecting Expanded or
DV-compliant will create super black and/or white in your rendered images.
For example, if you select Expanded , all black in your RGB graphics will
become super black, and white will become super white. To render your
RGB graphics with standard black and white levels, set your luminance
range to
Standard .
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Chroma filtering and Chroma interpolation Select these options to
adjust the chroma bandwidth of RGB graphics. This improves images that
have abrupt changes between different colors, such as a blue box on a black
or white background. You should select these options for most animation
and compositing work (computer-generated material). For most video
editing programs, however, it’s best that you not select these options. If you
find that your rendered images appear to be blurred, try clearing one or both
of these options.
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Chroma sampling for fast-motion video Select this option to help
eliminate artifacts such as jagged edges and unwanted lines at the edges of
fast-motion video (for PAL video only).
¡ Important When rendering graphics and titles, make sure that Chroma
sampling for fast-motion video is not selected, as this option can cause
jagged edges to appear in your rendered images.
6 Click OK to save your settings. Any change you make to your selected
luminance range setting (such as switching from Standard to Expanded )
will only take effect the next time you start your VFW program.