Grass Valley K2 ASI Media Client - Manual (Page 60)

60 K2 ASI Media Client User Manual June 10, 2008
Glossary
Event
An event is defined as a video list element: it is recorded or played from one time
during a certain period.
Fibre Channel
A general set of integrated standards developed by ANSI for flexible information
transfer over multiple physical interface types.
GOP
Group Of Pictures: this represents the MPEG 2 group of pictures I, B and P. The
beginning of a GOP is always an I picture.
GPI
General Purpose Interface. GPI triggers are physical connections between two pieces
of equipment. Typically GPI triggers are based on a change of state on a monitored
pin of the serial port. For instance you could create a GPI trigger that was operated by
a port on a piece of broadcast equipment.
HD
High Definition video.
iSCSI
Internet SCSI (small computer storage interface) is a storage access protocol that can
use a transport layer such as Gigabit Ethernet rather than be restricted to the short
distances determined by computer hardware buses. K2 Media Servers use iSCSI for
clients that need to deliver media assets with real-time performance. The tuning and
optimizing done by Grass Valley permits the use of iSCSI to deliver unparalleled,
high-throughput, and deterministic performance.
K2 Media Client
A Broadcast Enterprise Server that incorporates IT server platform and storage
technologies.
Non Drop Frame Timecode
In non-drop time code, all frames are numbered sequentially, but the ending time code
of a program does not accurately give the program's length. Drop-frame time code
yields precise running times, but frames are not all numbered sequentially. A frame
number must be dropped periodically to keep the clock right.
Protocol
A convention for data transmission that defines timing, control, format, and data
transmission.
RS-422
A standard interface, 9-pin serial port connector used with some remote protocol
applications; it supports multipoint connections.
SD
Standard Definition video.