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A B C D E F G H I J K L M N [O] P Q R S T U V W X Y Z

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Object Based Modler.
Modler using spheres, cubes, and other shapes to form objects. Solid models are resolution-independent; round edges stay round as you zoom in on them.
Oblique Angle.
Camera angle that shows the front and a side, or maybe two sides of an object. Oblique angle shots convey more dimensionality than face-on shots.
Oscillator.
An electronic device capable of generating a recurring waveform, or a digital process used by a synthesizer to generate the same.
Off-line Editing.
Making a "practice edit" using inexpensive video equipment. Result is a lower-quality "draft" copy used for decision making and to create a list of edits to be performed later on-line.
Octave.
A doubling or halving of frequency with the bottom octave usually given as 20 to 40 Hz.
Off-Axis.
Position to the side of a speaker at some angle other than 90 degrees to the front of the speaker cabinet and its speaker drivers resulting in audio signals reaching the listener as a result of the speaker's dispersion characteristics and often resulting in decreased output levels (as well as a different frequency response) compared to a position on-axis or directly in front of the speaker.
Omnidirectional.
In all directions simultaneously.
On-Axis.
Directly in front of a speaker; position at a right angle (90-degree angle) to the front of a speaker enclosure on which the speaker drivers are located (the baffle).
One-Chip Camera.
One image pickup chip senses all the colours plus black-and-white aspects of a TV picture.
On-line Editing.
Editing a video tape with the highest-quality VTRs and editor controllers. Process results in final edited master but costs more than off-line editing.
Optical Cable.
An interconnect cable used to transfer digital data between digital components using bursts of light carried over glass or plastic fibers.
Optical Disk Recorder.
Device that records analog video onto a plastic disk, like a laser video disc.
Optical Scan Conversion.
Aiming a TV camera at a TV screen and recording the result, useful for copying the picture from a nonstandard or troublesome tape.
Optical-sight Viewfinder.
Inexpensive, simple lens scope, gun-sight or cross hairs used to help aim a TV camera.
Optical Zoom Ratio.
The actual zoom ratio (smallest focal length divided into the largest focal length of the lens) of the physical lens without any digital enhancement from the camera.
Output Impedance.
Resistance to the flow of current at the output of an electronic device.
Output Selector.
Switch determining which of several signals will be fed to a VCR's output for viewing.
Overdub.
Recording sound on one audio track and then recording a related sound on another track. Each track may have its unique sound recorded or may be a mixture made from the playback of an already-recorded track plus the new sound.
Overlay.
Keyed insertion of one image into another. Overlay is used for example, to superimpose computer generated text on a video image, for titling purposes. In video, the overlay procedure requires synchronized sources for proper operation.
Overscan.
Video images generally exceed the size of the physical screen. The edge of the picture may or may not be displayed, to allow variations in television sets. The extra area is called the overscan area. Video productions are planned so critical action only occurs in the center safe title area. Professional monitors are capable of displaying the entire video image including the overscan area.
Overmodulating.
Using too much video signal when making an RF signal, which results in buzzing from the TV speaker when white lettering appears on the screen.
Oversampling.
Raises the sampling rate of digital data providing a smoother signal curve, but does not provide enhanced detail or resolution of the output.
Overscanned.
A TV picture blown up too big on the screen, causing the edges of the picture to be cut off and hidden from view.

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