FSN Series • User’s Guide
19
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Glossary of Switcher Terms
•
EXT
(External) — A digital key input that is dedicated to the DSK.
•
Fader
— see
T-Bar
.
•
FTB
(Fade to Black) — The button which enables the TD (Technical Director) to
fade everything on Program, including the DSK, to or from black.
•
GPIO
(General Purpose Input/Output) — One or more communications ports that
control input and output "triggering." For example, with a
GPI
(input) trigger, an
external peripheral device can trigger a specified switcher function. With a
GPO
(output) trigger, the switcher can trigger an external device.
•
GUI
(Graphical User Interface) — A term that describes a status display based on
graphics and icons, rather than strictly on numbers and letters.
•
HD-SDI
(High Definition Serial Digital Interface) — a high definition SDI signal
(SMPTE 292M). Example formats are 720p, 1080i, and 1080p.
•
Keyframe
— In a PIP “move,” a keyframe is a point where an action or change
occurs. For example, when a PIP moves from the upper right corner to full
screen, keyframe 1 is the upper right position, and keyframe 2 is the full screen
position of the PIP.
•
Keying
— The process of superimposing video from one source (the foreground)
on top of another source (the background).
•
Key Fill
— The video which fills the hole cut by the keying circuitry. Typically,
switchers provide a variety of choices for the fill source — internal mattes, external
video, or "self" fill are several examples.
•
Key Mask
— A key modification system that protects a portion of the foreground
video from being keyed, using the switcher’s internal pattern system.
•
Key Signal
— also known as
Key Source
. The signal that electronically cuts the
hole in the background video signal. Key signals typically originate from external
inputs such as character generators or cameras.
•
Linear Key
— a keying mode in which the edges of anti-aliased key sources
(such as character generators) are reproduced clearly. Typically, two separate
signals are required from a linear key source: a cut and a fill.
•
M/E
(Mix/Effects) — The section (or "bank") of a video switcher where video
signals are processed to select inputs and create mixes, wipes, keys and other
effects. An M/E is essentially a video layer that can be combined with other M/Es
(layers) to form the entire output of the switcher.
•
Menu
— A term used to describe buttons and functions on the high-resolution
color LCD touch screen.
•
Mix
— also known as a
Dissolve
. A transition between two video sources in
which one source fades out as the other fades in.
•
Native Resolution
— The resolution to which all processing is set within the
switcher frame, e.g., SD-SDI (SMPTE 259M, Level C) or HD-SDI (SMPTE 292M).
•
NTSC
— National Television Standards Committee. The oldest standard for color
picture broadcasting. NTSC is a standard definition format that operates at a
frequency of 60Hz, with 525 lines, 60 fields and 30 frames per second.
•
PAL
— Phase Alternating Line. PAL is the predominant TV standard in Europe.
PAL is a standard definition format that operates at a frequency of 50Hz, with 625
lines, 50 fields, and 25 frames per second.
•
PGM
(Program) — The switcher bus on the Program bank that selects the on-line
(or on-air) output signal from that bank.
