Grass Valley Switcher Products - Manual (Page 33)

Switcher Products — Protocols Manual33
Kayenne Contribution Tally Protocol
The keyer buses “in use” flags indicate whether or not the cut and fill
would be visible if the keyer was contributing to an output. These flags
need to be combined (ANDed) with the contribution bits to determine if a
keyer cut or fill bus is actually contributing to the output.
The source information indicates which source is feeding the ME inputs.
These may be primary sources or reentries. Sources and “in use” flags
apply to all outputs of an ME, but contribution information may be dif-
ferent for each output.
This differs from the Kalypso/Zodiak protocol in the following ways:
• Separate bytes for fill and cut “in use” flags.
• Separate bytes for key and background bus contributions.
• Byte order is different, especially source IDs.
• No ME is designated PGM-PST (except as indicated in the Logical ME
Unassigned Bytes in the ME Contribution Tally).
See Table 13 on page 34 .