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10. Chromakey
The chromakey method of key signal creation, which uses a chroma component instead of a
luminance component, is mostly used to composite moving subjects such as a person inside a
virtual background environment. For example, to place a person over a virtual background, first film
the person standing in front of a background such as a blue screen. The blue part of the filmed
image is detected and will be used to create the key signal.
The switcher has a single chromakey generator, which generates chromakey Fill and Key
signals by specifying a video signal and chromakey color. The Fill and Key signals can be output
respectively from AUX outputs, and assigned to any KEY or DSK on the switcher to display the
output onto the background video.
This chapter explains how to create and combine a chromakey with background video and adjust
the appearance using KEY1 as an example .
10-1. Creating a Chromakey
Setting Up KEY1
(1) Select a signal to be used as a background on the PGM bus.
(2) Double-press KEY1 above the KEY/AUX block to display the [KEY1 SETUP] menu
(3) Turn F1 to select INS/SRC, and press F1 or the page down button.
(4) The [KEY1 - INS/SRC] menu is displayed. Turn F1 to set TYPE to BUS.
(5)Turn F2 to set INSERT to CKFL and turn F3 to set SOURCE to CKKY.
KEY1 : TYPE :INSERT :SOURCE :INVERT : 1/4
INS/SRC : =BUS : >CKFL : =CKKY : =OFF :
(6) Press the KEY1 transition button in the bottom right of the control panel to display KEY1 on
the PGM image.
USB MEMORY
DIGIT AL VIDEO SW ITCHER HVS-
XT
SIZE
(PUSH to DEF)
1 2 3 4 5 6 7 8
USER BUTTON
REV NOR/REV
DIRECTION
BLACK
TRANS
BKGD KEY1 KEY2
NEXT TRANSITION
MIX WIPE
KEY1 KEY2
TRANSITION TYPE
AUTO CUT DSK1 DSK2
ALARM
F1 F2 F3 F4
PAGE
1 1 1
1
2 2 2 3 4
2 3 4 5 6 7 8 9 10 11 12
KEYER DSK AUX
KEY/AUX
PGM PREV CLEAN MV
PGM
PST
1 2 3 4 5 6 7 8 9 10 11 12
ME NU A TT A CH
DIR ECT
PA TT
DE TA CH
SETUP
KEY1
POSITION
POS R OT
2D DVE
WIP E
POS
ME NU
JOYSTICK
8 9
4 5 6
STILL MATT F ILE
KEY2 DSK1 DSK2
EV ENT
MA CRO
1 2 3
0
CLEAR
RECA LL STORE
ENTER
CK EF FECT
TRANS RATE WIP E
SELECT/KEYPAD
±
7
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