Grass Valley Kayenne v.3.0 - Manual (Page 28)

28 KAYENNE — User Manual
Section 2 — Concepts
Signal Routing
Inputs and Sources
Incoming video signals are connected to the Kayenne system via connec-
tors on input modules located at the back of the Kayenne Video Processor
frame. All inputs are serial digital (SMPTE 259M, CCIR 601). Signals from
external devices not operating in this standard will need to be converted.
Some devices (for example, a camera providing serial digital output) may
provide a video signal that can be received on a single connector. However,
other devices may output multiple signals. For example, a character gener-
ator usually provides a signal with two components (commonly called
video and key). Some incoming signals may also originate from devices the
Kayenne system can control (Router, DPM, DDR).
Note Although the character generator utilizes two inputs, it should
be defined as only a single Video/Key source (CGx). It is not
required to source define or button map the character gener-
ator’s Key signal.
For a Kayenne Video Production Center, the term source refers to all the
video signals and other attributes associated with a device. This is a funda-
mental concept. The Kayenne system is based on sources, not input signals
or crosspoints. Each source can be given a descriptive name, but has an ID
number for absolute identification. The Kayenne system uses ID numbers,
not source names or input connectors, to identify each source. Defining
each source is an important aspect of the Kayenne system.
Source Definition
When the Kayenne system is first configured, all sources are defined so the
incoming signals from each device can be used effectively. This is usually
done by engineering personnel, not operators, and once set these defini-
tions are not changed. A source definition data file tells the system how
many signals a source has (video only, or video and key), which physical
inputs to route whenever a particular source is selected, the default pro-
cessing of the source’s key signal (if present), and what external devices (if
any) are associated with that source. Tally is another important attribute of
a source. On-air tally relays are related to sources, not physical inputs or
source select buttons. The source definition process includes assigning a
name to each source. Once sources are defined, they are mapped to specific
source selection buttons. The user is then able to select the source by
pressing its button, and the Kayenne system automatically manages all the
necessary signals, performs any default processing, and enables any addi-
tional control capabilities associated with that source.