Sony BRS-200 - Manual (Page 87)

87
Using the Downstream Key (DSK) to Add Characters or Graphics
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You can change the transition time for executing the transition by pressing the
DSK AUTO button.
For details, see “Setting the Transition Time” on page 80.
Composing Video Using the Luminance Key
A video is created by detecting the differences of the components of brightness
(luminance) to cut unwanted portions from the DSK FILL video. This method
is referred to as “luminance key.”
Generally, the bright characters on a black background are cut out of the DSK
FILL video and superimposed on a background video.
In the example below, the character string “LESSON 1” cut from the DSK FILL
video is composed with the background video.
Basic operation of luminance keying
1
Press to light up the SW mode button to set the switcher to SW mode.
2
Press to light up the DSK button.
Note
LESSON 1 LESSON 1
Background video DSK FILL video
Luminance key
composition
Black background
Set the switcher to SW mode.
Press the DSK button.
Select “Lum” for “TYPE” on menu page 710.
Select a DSK FILL video with one of the DSK/AUX 1 to 12 buttons.
Adjust the video to be composed on menu page 720.
Execute downstream key composition with the DSK AUTO button.