Clean Chroma Key - Sony DVS-7250 Operation Software

Clean Chroma Key

When you are using the enhanced chroma key function, in the SETUP
(CHROMA KEY) menu a clean chroma key is possible.
Using 4:4:4 format signals for the background and foreground enables you to
obtain a higher quality keyed image than with conventional chroma keying.
Clean chroma keying produces an already combined image, so it is not
possible to carry out a key transition.
The background for clean chroma keying is always selected from the analog
Option
component signals (CH 1 to CH 4). Therefore, in a D1 system, a BKDS-
7133 board is always required.
Allocating signals for clean chroma key
Using the clean chroma key function, in order to be able to select the
combined chroma key image using cross-point buttons, it is first necessary to
allocate signals such as "M/E-1 CHR KEY FRGD" and "M/E-2 CHR KEY
FRGD" in a setup menu.
For details of the allocation, see page 14-53.
Forming a combined image using clean chroma key
Use the following procedure.
1
In the CHROMA KEY menu, select item 1 (SETUP).
The SETUP menu appears.
MODE
SINGLE
F1
FRGD INPUT SELECT
FRGD/
TYPE BKGD 1
RGB FRGD
F2 F3 F4 F5
Function key indications in the CHROMA KEY SETUP menu
(using the enhanced chroma key function)
(In a D2 system, the F8 (KEY BUS) and F9 (FRGD FORMAT)
indications do not appear.)
KEY
BUS
2 3 4
F6 F7 F8
Chapter 5 Chroma Keying
FRGD KEY
FORMAT MIX
422 ADD
F9 F10
(Continued)
5-19