AC-3 - The 5.1-channel compressed digital sound system specified for DTV broadcasting in Canada. AC-3 delivers CD-quality digital audio and provides five full-bandwidth channels for front left, front right, center, surround left and surround right speakers, plus an LFE (low frequency effect) subwoofer, for a total of 5.1 channels. AC-3 is one member of a family of sound systems developed by Dolby Labs.
High-Pass Crossover - A filter, often found in a powered subwoofer, that accepts the full-range audio signal heading for the main speakers. This filter only passes frequencies falling above a predetermined frequency and it attenuates those below. The goal is to prevent the main speakers from reproducing sounds that would be more accurately reproduced by a subwoofer.
Green - One of the three additive primary colors of light (Red, Green and Blue)
Cradle - The device in which a handheld or Palm OSr handheld is placed to synchronize data with a desktop computer. The cradle connects to the desktop via a serial cable.
Remote Programming - A delayed recording method that uses the remote control and digital readout on the VCR or TV screen.
Operating System - The software by which a computer creates an environment where applications are run. Often abbreviated as OS.
Exposure - The result of allowing light to act on photosensitive material. The amount of exposure depends on both the intensity of the light and the amount of time the light is allowed to fall on the sensitive material. The exposure is dependant on the aperture size, shutter speed and the sensitivity if the light gathering material.
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