Technology / Television (TV) Glossary

Video On-Demand (VOD): Allows VCR-type control of broadcast or cable programs, or video and movies offered on a PPV basis.

Videographer: The person overseeing all aspects of the video image--including lighting and the operation of the camera.

Videography: The characteristics of the video camera.

Viewers In Profile (VIP): The local television ratings book from Nielsen Media Research, issued after sweeps periods for each of the 210 television markets in the U.S. Click here for more information.

Viewers Per Viewing Household (VPVH): The number of viewing persons per tuning household: usually reported as 'per 1000 viewing households.'

Volume: How loud a sound is. One of three main characteristics of television sound. See pitch and timbre.

Waveform Monitor: An oscilloscope that measures the white and chroma levels of videotape or other video source

Weighted Average: A statistical quantity calculated by multiplying each value in a group by an assigned weight, summing these products and dividing the total by the sum of the weights.

Wide Angle Lens: A focal length which generally provides a wide view of a scene and increases the illusion of depth, so that some objects seem to be far apart from one another.

Widescreen: A term given to picture displays with a wider aspect ratio than your standard analog TV. Digital HDTV or SDTV is referred to as '16:9 widescreen.' Most motion pictures also have a 16:9 wides . . . View Full Definition

Wipe: A special effect used as a transition device between scenes, in which a line moves across the screen, apparent erasing one shot as the next replaces it.

Wireframe: A stage in computer-generated imagery wherein the surface of objects is represented with polygonal lines (wires). The wireframe will be covered with surfaces when the animation is rendered.

Wraparound Commercial: A commercial with noncommercial material wrapped around it, such as a question about a past sports event at the beginning and the answer at the end: sometimes called an insert, as when it is . . . View Full Definition

XGA: Extended Graphics Adapter: IBM's graphics standard that includes VGA and extended resolutions up to 1024 pixels by 768 lines interlaced and non-interlaced resolution.

Y-Pb-Pr: Designation For Hdtv Component Type Connections. Advanced method for interconnecting decoded video data. Generally used where a digital TV signal source is used. Preferred connection for Hig . . . View Full Definition

YuvYUV: The color space used by PAL and some NTSC formats (Y is the luminance and U and V are the color components).

Zoom In Or Zoom Out: A function of the zoom lens wherein the focal length is varied from wide angle to telephoto (zoom in), thereby magnifying the object as the angle of view is narrowed--or vice versa (zoom out).

Zoom Lens (Variable Focal Length): A lens with a variable focal length, allowing the operator to shift immediately and continuously from wide angle to telephoto (or vice versa) without switching lenses.

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