Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 255

If you don't see an entry for the output type that you want to simulate, you can create your own output
Custom
simulation preset by choosing Custom. You can specify a profile to use for each of the conversion or reinterpretation
steps.
• To preview how a movie will look if you output the movie to a device and view it on that device, use the same value
for Output Profile and Simulation Profile.
• To preview how a movie will look if you output the movie to one device and then view it on another, color-
managed device, use different values for Output Profile and Simulation Profile, and deselect Preserve RGB.
• To preview how a movie will look if you output the movie to one device and view it on another device, use different
values for Output Profile and Simulation Profile, and select Preserve RGB.
You can choose an output simulation preset for each view. Custom output simulation settings are shared between all
views.
Simulate an output type in a movie rendered for final output
Color management for output simulation is only for previews, but you can render a movie with a look that simulates
a particular output type. For example, you can render a movie for HDTV that simulates a film appearance. This is
especially useful for creating dailies when doing film work.
1 Choose Layer > New > Adjustment Layer to create a new adjustment layer at the top of your composition.
Choose Effect > Utility > Color Profile Converter to apply the Color Profile Converter to the adjustment layer.
2
3 Choose Edit > Duplicate to duplicate the effect.
In the Effect Controls panel, set the following options for the first instance of the effect:
4
Project Working Space
Input Profile
The type of output to simulate; for example, a film printing density profile, such as Kodak 5218/7218
Output Profile
Printing Density
Absolute Colorimetric
Intent
In the Effect Controls panel, set the following options for the second instance of the effect:
5
The type of playback to simulate; for example, a theater preview profile
Input Profile
The color space of the output medium; for example HDTV (Rec. 709)
Output Profile
Relative Colorimetric
Intent
To enable and disable this kind of output simulation, you can turn the adjustment layer on and off by selecting and
deselecting its Video switch in the Timeline panel.
Broadcast-safe colors
Analog video signal amplitude is expressed in IRE units (or volts in PAL video). Values between 7.5 and 100 IRE
units are considered broadcast-safe; colors in this range do not cause undesired artifacts such as audio noise and color
smearing. (In practice, some spikes over 100 IRE are legal, but for simplicity 100 IRE is considered legal here.) This
range is equivalent to a range from black to white of 64-940 in 10-bpc values for Y' in Y'CbCr, which corresponds to
16-235 in 8-bpc values. Therefore, many common video devices and software systems interpret 16 as black and 235
as white, instead of 0 and 255. These numbers don't directly correspond to RGB values.
AFTER EFFECTS CS3 249
User Guide