Sony DFS-700 - Manual (Page 59)

Chapter 3 Basic Operation
Chapter 3 Basic Operation
3-33
Inserting Characters and Graphics (1) — Title Key
You can insert (or superimpose) text and graphics into the background
image while applying effects. You can use either a luminance key or a
chroma key for this insertion.
Luminance Key
In a luminance key, a certain luminance level in the foreground image is
used as the threshold for creating the key signal, and the corresponding
part of the foreground image is inserted into the background image.
Normally the foreground image is on a black background, consisting of
bright text to be inserted in the background image.
Two-channel luminance keying
With the optional BKDF-711 2nd Channel DME Board installed, you can
also use a second luminance key channel.
When using two luminance keys, you must make both title 1 and title 2
settings in the TITLE section of the menu control section. Note that to
select the foreground signal used for the second luminance key, in the
delegation section press the FRGD 2 button, turning it on, then select the
desired video signal with one of the AUXILIARY buttons.
Background image Foreground image
Composite image formed by
luminance keying (program output)