MOTU HD Express User Manual page 29

480i Component Levels
The 480i Component Levels option (Figure 6-4) lets
you specify the voltage level standard for the
HD Express's SD component inputs and outputs
when running at 480i (NTSC). Choices are: EBU
N10, Sony Beta, Sony Beta Japan and Panasonic
MII. Choose the format that best matches the
device(s) connected to the SD component input
and output.
Color grading
In the Color Grading section (Figure 6-4), there are
ten parameters which define a color transfer
function, as defined by the American Society of
Cinematographers Color Decision List (ASC CDL)
specification.
The color grading controls in the Setup tab
(Figure 6-4) define a transfer function which
applies to the output on playback. The controls in
the Preview pane (Figure 6-9) define a transfer
function which applies to the input on capture. In
this case, it affects pass through as well as capture.
The power switch icon (Figure 6-8) is an enable/
bypass control. Click it to turn the color grading on
or off.
Enable/disable color grading
Figure 6-8: Color lookup table controls.
The Reset button resets the transfer function to its
default, which passes through each pixel
unchanged, and also switches to bypass mode.
Changing any control automatically enables the
transfer function, but you can also toggle between
Enabled and Bypassed by clicking on the enable/
bypass control.
M O T U V I D E O S E T U P
The Sat parameter is ASC CDL Saturation. A value
of 1.0 passes each pixel through unchanged. Values
below 1.0 will desaturate, with 0.0 resulting in a
monochrome image. Values greater than 1.0
increases saturation. The maximum legal value is
10.0, which produces extreme results.
The Slope, Offset, and Power parameters for each
component define a transfer function for that
component, as per the ASC CDL specification.
Offset ranges from -1 to +1, with a default of 0.
Power and Slope range from 0.10 to 10.00, with a
default of 1.0.
Each of the numeric controls may be modified in
three ways:
If the console window is in front, click on a
■
control to select it, and type a new value
Click and drag up or down
■
Use the mouse wheel
■
The latter two methods will work even if the
window is not in front (which is useful for
adjusting playback controls, because it can be done
while another application such as Final Cut
remains the front-most application).
The capture color correction controls (in the
Preview tab) only appear over the preview when
the mouse is over the preview. The panel holding
the capture color correction controls can be
dragged around within the preview pane, allowing
you to see any part of the preview while adjusting
the controls. To drag it, click on any part of the
panel other than one of the buttons or numeric
controls.
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