What are they talking about?!?
Digital/HDTV Terms that Begin with U

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UHF
Ultra high frequency, the range used by TV channels 14 through 69.

Uniformity
Even distribution across a given space. In video, uniformity can refer to the distribution of light (hot spotting) or color.

Unity Gain
Output that equals the input. Unity gain screen material reflects as much light as the reference material. Has an even dispersion of light.

Universal Remote
Remote that has the commands of numerous brands stored into memory and can control several different devices simultaneously.

Upconvert
The term used to describe the conversion of a lower apparent resolution to a higher number, such as "upconverting" 720p to 1080i. This is a misnomer, though, since to accomplish this, the horizontal scanning frequency is actually lowered from 45kHz to 33.75kHz. Resolution quality is not improved by this method.