unbalanced connection Connection method in which the audio signal is carried on two conductors, called signal and ground. Contrast with balanced connection, in which the audio signal is carried on three conductors.

upconvert Changing a video signal from one scanning rate to a signal with a higher scanning rate. HD-ready televisions upconvert 480i signals to a higher scanning rate for display.

user interface The “look” and “feel” of the controls and displays on a home-theater product.