Sony DVS-7300, User Manual

Page: 262 / 606

5-2
Chapter 5 Chroma Keying
Overview
Chroma keying uses a specific color in a foreground image to create a key
signal, which is then used to combine another image by keying.
The following figure illustrates this combination of a foreground image and
background image to create a chroma key combined image.
To use chroma keying on the requires the following optional boards.
BKDS-2031 Chromakey Board: Required for standard chroma keying.
This provides one chroma keyer on the M/E banks.
BKDS-2032 Chromakey Upgrade Board: Fitting this board together with
the BKDS-2031 provides the option of a considerable enhancement to
the chroma key function or the use of two chroma keyers.
BKDS-7133 Chroma Key Analog Component Input Board: Required for
input of analog component signals for chroma keying, and always
required for a D2 system.
Even in a D1 system, to use a clean chroma key this board is required in
addition to the BKDS-2031 and BKDS-2032 boards above.
Single mode and dual mode
When both the BKDS-2031 and BKDS-2032 are fitted, you can select the
enhanced chroma key function (single mode) or the use of two chroma
keyers (dual mode). In dual mode, however, the enhanced chroma key
function is no longer available. For details of how to select the mode, see the
section “Upgrade Board Mode Selection” (page 5-15).
Background Foreground
Chroma key combined image
Option