I/O board (Input/output board)
An electronic board that can transfer information from a computer to related devices.
IATSE (International Alliance of Theatrical and Stage Employees)
A trade union for various behind-the-scenes workers.
IBEW (International Brotherhood of Electrical Workers)
A trade union of electrical workers.
IC (integrated circuit)
A very small electronic component consisting of scores of transistors, resistors, capacitors and diodes all in one sealed housing.
Icon
Symbolic images in software displays that users can select to carry out desired tasks.
IEEE (Institute of Electrical and Electronics Engineers)
An organization responsible for creating a number of technical standards in television.
IFB (interrupted feedback system)
A small earpiece worn by talent that carries program sound or (when interrupted) instructions from a director.
Image capture board
Computer circuit that stores and displays images for computer manipulation.
image enhancer
1)An electronic circuit that sharpens detail in video pictures. Image enhancers commonly improve edge sharpness, reduce color edge fringing, correct color displacement, and reduce snow and noise.
2)A device used to sharpen transition lines in a video signal.
image intensifier
An electronic attachment to a lens system that amplifies incoming light. Also called night viewing device.
image stabilizer
A device that is part of a camera lens or camera mount that reduces or cancels vibration or moderate movement. Often used when a camera is hand-held or mounted in a moving vehicle.
impedance
1)A unit of electrical resistance. Generally expressed as high impedance (hi-Z) or low impedance (low-Z). The impedance of various pieces of interconnected video and audio equipment must match or else various types of distortion and inefficiency will result.
2)A measurement of the properties that tell whether two ro more circuits will interact well; measured in ohms.
in-camera editing
Videotaping shots in the order you want them to appear in the final production. Also called editing in the camera.
incident meter
As opposed to a reflected light meter, a photoelectric meter that measures and intensity of light falling on an object.
independent (station)
A broadcast station which is not affiliated with a network.
Induction
The process in which a circuit with a stronger magnetic field forces some of its signal into a circuit with a weaker magnetic field.
infrared
Energy near visible light (beyond visible red) used by some types of film and by some autofocus camera devices.
in-line amplifier
Amplifier inserted between two wires that increases the amplitude of a signal.
input selector switch
A multi-position switch found on many audio control boards that connects any one of several sources to a specific audio channel.
insert editing
1)As opposed to assembly editing, an editing process that inserts video and audio information over an existing control track.
2)Edits that use control tracks that have already been laid down on the tape.
insert mode
A video editing approach that uses a tape containing only a control track onto which segments from one or more other tapes are recorded. By not transferring a control track with each edit (as in the case of assembly editing) a more stable picture results.
insert shot
A close-up shot of something within the basic scene which is used to show features or details.
insertion loss
Loss of signal strength due to connection to a device.
instant replay
Immediately repeating a segment of a televised event for viewers to see again--often in slow motion.
interactive cable
Cable TV capable of sending information and responding to input from a user.
Interlaced Scanning
1) A display technique in which each TV picture, or frame, is produced using two sequential fields. One field contains the off-numbered lines of the frame, and the other the even-numbered lines. The TV tube is scanned twice, with the lines of two fields interleaved, or interlaced. The technique eliminates visible flicker which can be annoying at low frame rates.
2) The process of taking a field of odd-numbered lines (1,3,5,7,…) and combining it with a field of even-numbered lines (2,4,6,8,…) to make a complete video frame.
Insertion Gain
The gain (or loss) in overall signal amplitude introduction by a piece of equipment in the signal path. Insertion gain is expressed as a percent (V out - V in) / V in X 100.
Interpolation
The mathematical process of creating new video information (pixels) from surrounding information.
institutional video
Television production not intended for a mass audience or for general broadcast. Includes most corporate, educational and medical productions.
INT
A script designation for an interior scene.
intensity
The brightness of a light source as measured in foot-candles or lux.
interactive video
The video presentation in which the user's actions, choices and decisions affect the course of the presentation.
intercom
See PL line.
intercutting
Cutting back and forth between scenes to show action occurring at the same time in different places.
interface
The connection between two devices, such as a computer and a peripheral.
interlaced
The scanning process which combines the odd and even fields to produce a full video frame.
internal key
As opposed to external key, with internal key the cutout portion of a background video source is filled with a signal from the switcher.
ISP / Internet service provider
Company provides Internet service.
interpolation
The process of replacing missing digital data when the loss goes beyond the system's basic error correction capability. Computations are performed on the previous and subsequent valid data values to replace the missing information. The last valid data value normally held and repeated until a new valid data is available.
interruptible foldback; interruptible feedback; IFB
A communication system allowing communication with talent while they are on the air. A small earpiece worn by the talent which normally carries program sound, but this can be interrupted by instructions from the director.
interview format
Using a basic interview as the basis of production or program segment.
intro
Introduction. The beginning or introductory portion of a production or production segment.
Intravision
A special effects optical process that allows you to look through the camera and see exactly what you are going to get.
intrusion on seclusion
Related to invasion of privacy, a legal term denoting the unlawful entering into a place or state without invitation, right or welcome.
invasion of privacy
Intrusion on seclusion. Illegally and inappropriately prying into someone's personal business. It may actual, such as trespassing on private property to secure a news story, or figurative, such as when a telephoto lens or electronic eavesdropping device is used.
IPS (inches per second)
Generally refers to tape speed or tape writing speed.
IRE unit
1)A unit of amplitude originally standardized by the Institute of Radio Engineers.
2)A relative unit of measure (named for the Institute of Radio Engineers) on a waveform monitor. One IRE equals 1/140th of the composite video signal’s peak-to-peak voltage.
iris
An adjustable diaphragm that controls the amount of light passing through a lens.
ISDN
Integrated Services Digital Network. A high speed telephone line, generally related to Internet access.
isoed
A camera that is routed into a separate VTR and is not dependent upon the output of the on-line video switcher to be recorded. Commonly used in instant replays.
isolated camera
Isod camera. A camera that is both routed through the switcher and has its own separate, VTR. The recorded signal from an isod camera is typically used for instant replays.
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