Barco Event Master E2, Руководство пользователя

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3. General
3.3 Terms and de fi nitions
3G
A 3 Gbit/s serial digital 10-bit or 12-bit video interface (SMPTE 424M and 425M).
Background (BCK)
Typically an unscaled source originating from a computer’s multi-head graphics card, or a frame grab from a scaled source. E2
provides two background sources (
BG A and BG B ), each of which appears at the system’s lowest priority — visually in back or
underneath all other sources.
Chroma Key
A type of key where the hole-cutting information is derived from a color rather than from a video level. An common example on
television, is when the weatherman appears to be standing in front of a map. The map itself is a video signal, and the weatherman
is in fact standing in front of a green (or blue) screen. On the switcher, the Chroma Key process electronically subtracts the color
from the foreground image, and replaces it with video from the background image to form a composite image.
Clip, Gain, Opacity
In switcher terminology, the process of fi ne-tuning a key of any type (luminance, linear, or chroma). Clipping sets the threshold for
the hole cutting circuitry, while "gain" de fi nes the range and sensitivity of adjustment. The "opacity" is the transparency or density of
the key, as revealed over a background.
Computer Video
A generic term indicating video that originates from a computer platform. A progressive scan signal that follows VESA (Video Elec-
tronics Standards Association) standards, with typical resolutions of 800 x 600, 1024 x 768, 1280 x 1024, etc.
Crosspoint
The video switch (or button) that selects the input required on a particular switcher bus.
Cut
Cut is an instantaneous switch from one video source to another.
DA (Distribution Ampli fi er)
A video device that inputs one video signal, and outputs multiple “identical” signals.
Destination (DST)
Destination is a location to which you can route the output of an E2. A destination can be con fi gured as:
• A single screen (one projector)
• Multiple screens (such as a wide screen application)
• An external processor (such as a ImagePRO-II )
DSK (Downstream Keyer)
A DSK is a key that is electronically located after all other switcher functions — visually on top of all other layers and buses.
Fader
See T-Bar .
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 De fi nition Serial Digital Interface)
HD-SDI signal is a high de fi nition SDI signal (SMPTE 292M). Example formats are 720p, 1080i, and 1080p.
Key
An electronic (and visual) process whereby one image is electronically superimposed over another source or background. Keys are
typically used for titles, logos, and banners.
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.
18 R5905948 E2 12/12/2014