O

Object Oriented Graphics

A picture or other graphic where each object, rather than being made up of separate dots (as in a bit-mapped graphic), is treated as a unit.

OC3

Optical Carrier Level 3. A 155 Mbps ATM SONET signal stream that can carry three DS3 signals.

Odetics Cart

A bank of VTRs with magazines for storing tapes and a robot arm for exchanging tapes amongst the VTRs

OEM (Original Equipment Manufacturer -- sometimes called Other Equipment Manufacturer)

A manufacturer which sells equipment slightly redesigned to several vendors. Each vendor then puts its name on that equipment and sells it as its private brand.

Off-Line Editing

Rough-cut edits often made on U-matic� equipment or low-end equipment such as 8mm or VHS. The objective is to produce a frame-accurate edit list for on-line editing. A low resolution, usually computer and disk based edit system in which the creative editing decisions can be made at lower cost and often with greater flexibility than in an expensive fully equipped on-line bay. An EDL is created to automate the same edits in the on-line.

Ohm's Law

Ohm's Law is named for German mathematician George Simon Ohm. Ohm expresses in his law the formula by which Current, Voltage and Resistance affect each other. Basically stated: voltage is a product of current and Resistant. Since power is the product of Voltage and Current (electrons in motion) it plays a roll in calculation. This is for DC calculation or AC when no reactance is present.

Omni-Directional Microphone

A microphone that is sensitive to sounds from all directions.

OmniServe

System providing DTMF and GPI input-output interfaces.

On-Air Schedule

The master schedule, created by merging all the other schedules. Manages playout resources, EPG information, sending the playlist to the Automation Host.

On-Air Studio

The studio that sends program material to the transmitter and is sometimes called Master Control

On-Line Editing

An editing system where the actual video master is created. on-line editing is usually preceded by off-line editing, which produces an EDL list to save time and money. An on-line bay usually consists of an editing computer, video switcher, audio mixer, 1 or more channels of DVE, character generator, and several video tape machines. Edits made onto a final master tape often in a computer-assembly process using high-end equipment such as Betacam� or digital VTRs.

Opening Billboard

This is usually the very first show-identifying information. It may or may not be at the very beginning of the program or show. There may be a tease or teaser segment before it. It may or may not contain opening credits. It always identifies what the show is.

Operator Select Panel

Provides the BCO with indications of problems at other operator stations, selections to correct faults at the local stations and selections for local signal monitoring.

Optical Effects

Trick shots prepared by the use of an optical printer in the laboratory, especially fades and dissolves.

Optical Head

The data-reading unit on a compact disc drive or laserdisc player containing the laser, photo detector, and focusing mechanisms.

Optical Read-Only-Memory

A 5.25-inch laser-encoded optical memory storage medium, featuring a concentric format and constant angular velocity (CAV). ROMs have faster access time than CD-ROM discs, but less storage space (250 megabytes as opposed to 500).

Optical Sound

A sound track in which the record takes the form of variations of a photographic image.

Original Scene Memory

Original Scene Memory is stored automatically each time a new event is entered or created and allows the colorist to undo any changes made, after entering the scene and before leaving it.

Origination Site

Used to describe the location from which full-motion video is transmitted, and possibly uplinked, in a videoconference. Other sites participating are referred to as receive sites.

Operating System. The basic software that makes a computer run. An OS schedules tasks, allocates storage, handles the interface to peripheral hardware and presents a default interface to the user when no application program is running

OSP (Operator Select Panel)

Outport

Mechanical assembly in LMS used for depositing cassette tapes ejected form the system by the operator.

Output Jitter

Jitter at the output of equipment embedded in a system. It consists of intrinsic jitter as well as jitter transferred from the input.

Out -Take

A take of a scene which is not used for printing or the final edit.

Overdubbing

A multi-track recording technique where new material is recorded on separate tracks in order to synchronize them with previously recorded material on other tracks.

Oversampling

Sampling data at a higher rate than normal to obtain more accurate results or to make it easier to sample.

Overscan

A television picture that is enlarged beyond the boundaries of the TV picture tube. Most home TV sets use overscaned.