Technology / Television (TV) Glossary

Dolby Pro Logic: Dolby Surround technology delivers four channels of audio - Left, Center, Right, and Mono Surround - that are matrix-encoded onto just two audio tracks. These two tracks are then carried on . . . View Full Definition

Dolby Surround: Or Dolby Stereo. Four audio channels (left, center, right, and surround) converted to two channels referred to as right-total and left-total.

Dolly: A wheeled camera support which permits a rolling camera movement. In conventional television usage, dollying refers to forward or backward movement and trucking (which is accomplished with a . . . View Full Definition

Dominant Ideology: In Marxism, the system of beliefs about the world propagated and supported by the society's ruling class.

Dot Pitch: The distance of one phosphor dot to the nearest phosphor dot of the same color on the adjacent line.

Downconvert: In DTV, the conversion from a higher-resolution input signal number to a lower one. For example, some DTV receivers can be set to downconvert an HDTV 1080i signal to a standard 480i signal t . . . View Full Definition

Downconverting: Process by which a high-definition signal is converted to a standard definition picture.

Downlink: A signal’s path from satellite to antenna.

Drop-In Ad: A local commercial inserted into a national program, or, more generally, an advertising message inserted into a larger advertisement, as for a local dealer or retailer, or a phrase, such as . . . View Full Definition

Dual Lnb: A dual LNB has two coax connections. You can operate up to two satellite television receivers with a dual LNB.

Dubbing: The replacement of one voice for another.

Duopoly: An instance where two stations in the same designated market area are owned by the same party. Though once forbidden by the FCC, the rules surrounding duopolies have been relaxed in recent years.

Dynamic Range: A range of sounds from soft to loud. A measurement of the limits of microphones, recording and playback machines, and other audio equipment.

E-Business: The transfer of data from one computer to another. When computers connect, trading partners can conduct business transactions electronically. E-Business promises a more efficient procedure f . . . View Full Definition

Echostar: The company that owns and operates DISH Network.

Editech: The first electronic editing system for videotape--invented and marketed by Ampex.

Effects Theory: A type of communication theory (e.g., hypodermic needle concept) which proposes that, because viewers are passive, television directly affects them.

Efficiency: The relationship of media cost to audience delivery.

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