Sony MKS-2017 User Manual

Ch
ap
te

r 

6  
 A
d

v

a

nc
ed
 O
p

er

at

io

ns

107

Advanced Key Operations

If the foreground image includes shades of the background 
color, turn this function on to remove the color from the 
foreground image.

In the Key >M/E Key1 >Chroma Key menu, turn [Key 
Active] off, and turn [Color Cancel] on.

Set the following parameters with the knobs.

a) Set to 1 for through processing, with no filter applied. The filter 

becomes stronger as larger numbers are specified

Turn [Key Active] on.

The video composed with chroma key reappears on 
the monitor.

Adjusting the key signal for color cancel
When color cancel is on, you can adjust the key signal for 
color cancel.

In the Key >M/E Key1 >Chroma Key menu, press 
[Cancel Key], turning it on.

The color cancel function is turned on.

Set the following parameters with the knobs.

Make the following settings as required.

In the Key >M/E Key1 >Chroma Key menu, press [CC 
Window], turning it on.

Set the following parameters with the knobs.

a) See the figure in “To adjust the window.”

In the Key >M/E Key1 >Chroma Key menu, press [CC 
Key Pos], turning it on.

Set the following parameters with the knobs.

By using the Y balance function on a color cancel key, 
colors of the same hue as the background (typically blue) 
can be output in the foreground without being cancelled.

In the Key >M/E Key1 >Chroma Key menu, press [CC 
Y Balance], turning it on.

Set the following parameter with the knob.

Chroma keying generates a key signal based on a 
particular color (reference color) in the foreground 
(typically a plain blue background). The “window” refers 
to the range of colors which are regarded as matching this 
specified reference color to create the key signal.
As seen on a vectorscope, the range for this matching 
corresponds to a truncated sector (see the following 
figure). This range is specified by two parameters: the 
“Angle” parameter, which determines the range of the hue 
parameter, and the “Crop” parameter, which determines 
the degree of truncation.

1 (Lum)

Luminance

0.00 to 100.00

2 (Sat)

Saturation

0.00 to 100.00

3 (Hue)

Hue

359.99 to 0.00

4 (Filter)

Filter coefficient

1 to 9

 a)

1 (Clip)

Reference level 
of color cancel 
key

0.00 to 100.00

2 (Gain)

Key gain

–100.00 to +100.00

1 (Crop)

Crop value 

a)

100.00 to 0.00

2 (Angle)

Angle value 

a)

180.00 to 0.00

1 (Left Pos)

Move the left edge of 
the color cancel key.

–3.00 to +3.00

2 (Right Pos)

Move the right edge 
of the color cancel 
key.

–3.00 to +3.00

3 (H Phase)

Horizontal position of 
the color cancel key.

Left Pos value 
shown

1 (Mixture)

Y balance key ratio

0.00 to 100.00