User guide

114
Chapter 6, Setting Up Realtime Effects with Adobe Premiere
Saturation control to move the dots closer to or farther from the center of
the graph.
8 You can also check the white levels in your color bar pattern. From the
Scope View Settings menu, choose Y Waveform. The gray or white color
bar corresponds to a line on the waveform (usually the first line at the left).
The IRE or mV level of this line should match the type of color bars you are
using. If needed, use the
Brightness and Contrast proc amp controls so
that the proper IRE or mV level is set. For example, when using
NTSC/EIA
75% color bars
, adjust the Brightness control so that the level of IRE for
the gray portion of your color bars is set to 75.
¥Tip You can save these modifications as a custom effect so that you can
quickly calibrate all your clips from the same source tape. For details on how
to save your effect for future use, see “Common controls on the Custom
pages” on page 87.
Ensuring legal colors for broadcast
Many television studios require that a video clip’s luminance (Y) and
chrominance (C) values don’t exceed 100 IRE on an NTSC system, or 700 mV
on a PAL system. These are the highest “legal” levels for broadcast video. To
ensure that your clip’s levels are legal for broadcast:
1 Place your clip on the Timeline and apply the Matrox color correction effect
to the clip.
2 Select an effect from the Effect List.
3 Click the Custom Color Corrections tab, then click Scopes. On the
Image View page, select Analyze image.
4 Double-click the Scope View tab to display the Matrox scopes in a separate
window.
5 From the Scope View Settings menu, choose YC Waveform.
6 Scrub through your clip, and make sure that there are no red dots in the
waveform monitor (levels exceeding 100 IRE or 700 mV show as red).
7 If needed, lower the Brightness and/or Saturation proc amp controls, until
there are no red dots in the waveform monitor.
Dot aligned in blue target