Matrox Electronic Systems Matrox RT.X2 - Manual (Page 48)

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Chapter 3, Defining Your Adobe Premiere Pro Settings
¦ Note The higher the DC precision value that’s used to capture or render
your video, the more likely that the DC content will be increased at the expense
of the AC content in the encoded stream. This may result in lowering the
overall quality of the compressed stream at a specified data rate.
6 Under Zig Zag Type , select one of the following:
$
Regular Sets the regular (default) zig zag scanning pattern of the AC
coefficient of the DCT block as defined in the ISO/IEC 13818-2 (figure
7-2) specification documentation.
$
Alternate Sets an alternate zig zag scanning pattern of the AC coefficient
of the DCT block as defined in the ISO/IEC 13818-2 (figure 7-3)
specification documentation. Use this setting when capturing or rendering
video at a high data rate (that is, at a data rate of about 25 Mb/sec for SD
video, or 90 Mb/sec or higher for HD video).
7 Select the Force Frame-based DCT setting to render macroblocks as
frames rather than as fields. In some cases, graphics will yield less artifacts if
this option is selected.
8 Click OK to save your settings.