Grass Valley Switcher Products - Manual (Page 21)

Switcher Products — Protocols Manual21
Kalypso & Zodiak Contribution Tally Protocol
The Kalypso and Zodiak internal still store has two inputs. They can be
configured as two independent video inputs or as a video-key pair. The
Input Mode flag indicates which mode the inputs are operating in.
The Record flags indicate whether or not the input is in use. If an input is
grabbing a frame or recording an animation, the bit will be 1. An active
record flag is essentially a beginning point for tally regardless of still store
output usage since the indicated source is being recorded on the still store’s
hard disk. Refer to
Table 4 .
Output Contribution Information
Kalypso Systems
Kalypso has 46 programmable outputs (Outputs 39 and 40 are dedicated to
Black and Test and report these source IDs). An output can be programmed
as either an aux bus or as a dedicated output for an ME, etc. From a tally
standpoint, the only difference is what source is selected on the output. A
dedicated output won’t change sources while an aux bus might. That is, the
tally protocol won’t indicate what the output is being used for (dedicated
output or aux bus) and the receiver of the information shouldn’t care. It
may be necessary to identify which physical outputs are starting points for
tally calculations.
Output status is communicated in 6 messages of 8 outputs each. For
example, status for output 10 would be sent as output 2 in the second block.
The on-air flags indicate whether or not the switcher considers the output
to be on air. This information can be hard coded, or may be based on status
from some external device. For example, the Pgm-Pst PGM A output is the
main program output and is normally assumed to be on air. The feed to an
iso recorder may utilize a GPI input (running status via the switcher-VTR
control interface) so that output is on air only when the VTR is in record.
Tally calculations may choose to ignore these flags.
Outputs used as aux buses may be paired in order to deliver a video-key
pair to an external device. The Output Mode flags indicate whether the two
Table 4. Still Store Contribution
b7 b6 b5 b4 b3 b2 b1 b0 Notes
Still Store Contribution (0xA) 1
Only one instance of Still
Store contribution
Still Store Contribution (0xA) 1
Input 1 Source (1 – 128)
Input 2 Source (1 – 128)
0
Output
7/8
Mode
Output
5/6
Mode
Output
3/4
Mode
Output
1/2
Mode
Input
Mode
Input 2
Rec
Input 1
Rec
Mode
0 – Video-video
1 – Video-key