Grass Valley Kalypso User Manual V.15.0 - Manual (Page 71)

Kalypso — User Manual 71
Signal Routing
A simple basic M/E used in a typical switcher will be used as an example
in the following discussion. A Kalypso M/E has added capabilities, but the
basic principles described here will apply. See Section 1 - System Overview
for a simplified diagram of the actual Kalypso M/E architecture.
Figure 51. Simplified Mix Effects (M/E) Subsystem
The basic M/E shown in Figure 51 has an A and a B background bus. These
buses select the background video signals sent to the output of the M/E.
Generally the source on the background A bus is the current background
output, and the source on the background B bus is the background video
that will be used next. During most transitions, portions of both back-
grounds are output simultaneously. The keyers in the M/E allow the inclu-
sion of additional material over the background. Wipe generators also
exist, which create patterns used by the mixer for wipe transitions, or used
by the keyers to modify the signals it sends the mixer. See Transitions
on
page 75 and Keying on page 79 for more information. The processed signal in
an M/E is then sent to an M/E output, typically program or preview.
A video production switcher can have more than one M/E. For example, a
4-M/E Kalypso system has four (M/E 1, M/E 2, M/E 3, and PGM PST).
Each Kalypso M/E actually is able to produce up to six outputs (Program
A, Preview A, Program B, C, D, and Preview 2 that is shared by the three
additional program outputs). These additional outputs allow great flexi-
bility in configuring a Kalypso system for special purposes.
Re-Entry
Switchers with multiple M/Es generally have re-entry capabilities. Re-
entry permits the switcher to select the output of one M/E for use as an
input source to another M/E. The signals are routed internally.
The Kalypso system supports M/E re-entry in any order. For example, an
output of M/E 2 can be sent to M/E 1, and an output of M/E 1 can be sent
to M/E 3. Infinite looping re-entry (for example, M/E 1 sent to M/E 2 and
M/E 2 sent back to M/E 1) is not allowed.
Source Signal Inputs
061_00_22_r1
Crosspoint
Matrix
Keyer
Mixer
Wipe
Generator
M/E
Outputs
Background A
M/E Program
M/E Preview
Background B
Key Cut
Key Fill