GENERAL TERMS

Broadcast:
A single radio or TV program; the transmission or duration of a program. Any message that is transmitted over a large area, not necessarily by a broadcast station, is said to be broadcast.
Audio/Video (AV):
Sound and sight, as in a script with the text of the dialogue and a description of the accompanying visual action.
HDTV/High-Definition Television:
Broadcasting using a line standard of 720 or greater. Prior to World War II, high definition meant a line standard greater than 240 lines.
Analog Video:
A method of data storage and transmission by continuous or wavelike signals of pulses of varying (greater or lesser) intensity; in contrast to digital transmission (on or off).
Digital video:
A video picture that recorded digitally. Some machines can store single frames and short segments of video digitally on disks. There are also tape machines that can store large amounts of video digitally. Multiple generations of digital video look exactly like the camera original because the picture is recreated by digital signals rather than by copying the signal.
Archive:
1.  Storage of master material under controlled conditions
2.  Long term storage of material on an offline storage medium.
3.  Archive copy is a master copy intended solely for storage and not to be used in distribution.
Aspect ratio:
The ratio between the width and the height of the picture. In NTSC television sets, this is 4:3; in widescreen (ATSC) sets, 16:9. Sometimes it is printed decimally as 1.33:1 for 4:3 and 1.78:1 for 16:9.
BUG/Watermark; A DOG (Digital on-screen graphic) permanent on-screen logo. Usually located in the corner of the screen. So-called because it looks like an insect is hanging out in the corner of the screen.
FPS/Frames per Second: The number of times the television is refreshed in a second of time. As a rule of thumb, this is the same as the local Alternating Current electricity supply - 60 Hz or 50 Hz.

PRODUCTION TERMS
Live: Any programming which is broadcast immediately as it is being delivered (a live report); performed (a live concert or show); or captured (live news or sports coverage). Requires an unbroken communications chain without any intervening recording or storage technology. Considered the most exciting form of broadcasting, delivered “as it happens”.
OB/Outside Broadcast: A complete event or programme, or a brief news report, produced and fed back live from the location by an OB vehicle to the broadcaster.
Broadcast Gallery: Also known as the production control room or the studio control room. Where the composition of the outgoing program takes place.
Multicam: The use of two or more cameras simultaneously to shoot a scene from more than one angle.
Shoot: A session at which performances are filmed, especially on location instead of in a studio (to go on a shoot or to a shoot); to film, photograph, or record such a session or any scene; an instruction to start the camera. To overshoot is to shoot too much footage; to undershoot is to shoot too little. A shooter is a photographer.
Digital Camera: A filmless camera in which images are recorded on a computer disk and instantly transmitted to computer screens.
Editor:
A device for revising film, tape, or other materials, including the actual cutting and splicing, or joining, which is done mechanically or electronically under the supervision of a person also called an editor (or film editor, sound editor, or tape editor).

PROJECTION
Projector:
A projector is a device that integrates a light source, optics system, electronics and displays, thus projecting an image from a computer or video onto a surface for large image viewing.
ANSI lumens:
ANSI lumens refers to the degree of brightness illuminated in a projector’s display, measured in “candles”.
Pixel:
A pixel is a small dot that represents a single element of a display.
Colour Temperature:
Colour temperature refers to the amount of “whiteness” of a light source. Metal halide lamps have much higher color temperatures than halogen lights.
DVI (digital visual interface):
DVI refers to the digital interface between projectors and PCs. A projector that has DVI can send a digital-to-digital connection, without converting to analog, thereby delivering a clear image.
HDMI (high-definition multimedia interface):
HDMI is a standard for video interfacing, with a bandwidth of up to 5 gigabytes, which means it can easily support all HDTV standards.
Focus:
The focus on a projector defines the minimum and maximum projection distances.
Keystoning:
Automatic keystoning is a projector feature that creates a uniform image top to bottom by correcting the image if it’s projected onto the screen on an angle.
Throw Distance:
The throw distance is the distance from the center of a projector lens to the center of the screen onto which it’s projecting.