Chroma Keying - Sony DFS-700 Service Manual
Dme switcher, digital/analog input board, analog composite input board, digital multi effects board, 3d video mapping effects board
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Also See for DFS-700:
- Operating instructions manual (212 pages) ,
- Specifications (8 pages)
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Inserting Characters and Graphics (1) — Title Key
Chroma Keying
In chroma keying, a key signal is created based on a specific reference
color in the foreground image, and used to replace the corresponding parts
of the foreground image by the background image. Normally, the
foreground image is created with a plain blue background, which is then
replaced by the background image.
Background image
In this system, you can use either of the following methods to carry out
chroma keying.
• Auto chroma keying
You point the cursor at part of the background, thus specifying the keying
color. This is the quick and easy way to make a composite image.
• Manual chroma keying
You specify the keying color by manual adjustment. This allows you
finer control than with auto chroma keying.
By starting with auto chroma keying, then using manual chroma key
adjustments as required, you can get the optimum composite image
efficiently.
Two-channel chroma keying
With the optional BKDF-711 2nd Channel DME Board installed, you can
use a second chroma key channel.
To use two chroma key channels, set both title 1 and title 2 in the TITLE
section of the menu control section. To select the foreground image used
for the second chroma key channel, press the FRGD 2 button in the
delegation section, turning it on, then with one of the AUXILIARY
buttons select the desired video signal.
To use a normal effect for a title key
In this case, use one of the buttons in column 1 of the TITLE section to
recall the title 1 setting menu (T1LUM, T1CRK, or T1MSK), and make
the settings.
3-36
Chapter 3 Basic Operation
Foreground image
Composite image formed by chroma
keying (program output)
Auto chroma keying
To combine the background image and foreground image by auto chroma
keying, use the following procedure.
4
1
TITLE
EDITOR
LUM
GPI
CRK
SET UP
MASK
SHIFT
CCR
1
AUXILIARY
BLACK
1
BACKGROUND
1
BLACK
FOREGROUND
BLACK
1
2
1
Select the background image with the BACKGROUND bus buttons.
The selected background image appears on the program monitor.
2
Select the foreground image with the FOREGROUND bus buttons.
If a preview monitor is connected, the selected foreground image
appears in the preview monitor.
3
Select the effect pattern, and press the TITLE button in the effect
transition section, turning it on.
Note
Depending on the effect pattern, it may not be possible to use chroma
keying. If such a pattern is selected, the TITLE button does not light.
Check the "TITLE" column of the table in the section "Effect Pattern
Variant Forms and Decorations" (page A-22), and select a pattern for
which this shows a check mark (√).
When the TITLE button lights, the N/R button also automatically lights,
indicating that the system is in N/R (normal/reverse) mode. While the
TITLE button is lit, it is not possible to switch out of N/R mode.
6
USER PGM
SNAP SHOT
2
DSK
EDGE
STATUS EDIT
5,7
LUM
LUM
TRAIL
SHADOW
CRK
BORDER BEVELD
EDGE
INITIAL
EDIT
LEARN
MASK
MASK
SOFT
RECALL
3
LIGHTING
MATTES
BORDER
PATTERN
PAGE
F1
F2
F3
F4
F5
HOLD
LOCATION
ADJ
INPUT
EFFECT
DSK
TRANS RATE
PATTERN NUMBER
FTB
SET
SET
CCR
TITLE 1
TITLE 2
DSK
SUPER BG FRGD 2 MEMORY
FRAME
FREEZ
MIX
EFFECT
N/R
REV
DIRECT
DIRECT
DSK PVW
SOURCE
SOURCE
FILL
RECALL
PATTERN
LAST X
FADE
TO
7
8
9
INS
BLACK
2
3
4
5
6
7
8
MEMORY
INT
TITLE
VIDEO
4
5
6
DEL
2
3
4
5
6
7
8
INT
CUT
MEMORY
VIDEO
P IN P
DSK
1
2
3
RST
DOWN
UP
ENTER
0
INT
AUTO
2
3
4
5
6
7
8
MEMORY
VIDEO
TRANS
PATTERN/KEY PAD
(continued)
3-37
Chapter 3 Basic Operation
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