Barco 26-0702000-00 däçëë~êó=çÑ=pïáíÅÜÉê=qÉêãë=, ~ ~ ~ ~ ~, • • • • • •, NK==fåíêçÇìÅíáçå

NK==fåíêçÇìÅíáçå

Glossary of Switcher Terms

däçëë~êó=çÑ=pïáíÅÜÉê=qÉêãë=

The following terms and abbreviations are used throughout this guide:

•

•

3G — A 3 Gbit/s serial digital 10-bit or 12-bit video interface (SMPTE 424M and 425M).

AUX (Auxiliary) Bus — AUX buses are extra switching buses that allow video signals connected to the switcher to be routed to external equipment such as VTRs, monitors, projectors, etc.

•

•

•

•

•

Bank — a name for the three combined individual buses in an M/E, including the PGM bus, the PST bus and the KEY bus.

BG (Background) — The switcher bus on an M/E bank that selects the on-line (or on-air) output signal.

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 fine-tuning a key of any type (luminance, linear, or chroma). Clipping sets the threshold for the hole- cutting circuitry, while "gain" defines the range and sensitivity of adjustment. The "opacity" is the transparency or density of the key, as revealed over a background.

Chassis Cards — In addition to the required M/E and System cards, the following cards that can be installed in the chassis, enabling you to configure the switcher in many flexible ways. These cards are abbreviated as follows:

~

~

~

~

~

NIC (Native Input Card) — provides eight native video inputs.

UIC (Universal Input Card) — provides two universal scaler inputs. UOC (Universal Output Card) — provides two universal auxiliary outputs. NAC (Native Aux Output Card) — provides eight native auxiliary outputs. DVE (Digital Video Effects) — provides two “2D” DVE channels.

•

•

•

•

•

•

CLN (Clean Feed) — An output of an M/E that originates upstream of the M/E’s keyers. For example, if the output of M/E 1 is Camera 1 plus a key, the “clean” output is Camera 1 only, minus the key.

Computer Video — A generic term indicating video that originates from a computer platform. A progressive scan signal that follows VESA (Video Electronics 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 — an instantaneous switch from one video source to another.

DA (Distribution Amplifier) — A video device that inputs one video signal, and outputs multiple “identical” signals.

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. Any operations performed “upstream” on the switcher M/Es will not affect the downstream key video.

20 FSN Series • User’s Guide • Rev 01