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.
Velocity Modulated Scan - An advanced circuitry located along the neck of the CRT that senses transitions from dark to light in the video signal. The black and white portions of the signal are sped up and slowed down respectively, resulting in sharp dark to light transitions and outstanding edge definition.
Secure Digital - A popular flash memory device for PDAs
Symbian / Symbian Ltd. - A joint venture between Psion, Motorola, Ericsson and Nokia to develop and support the EPOC operating system. Formerly known as Psion Software. Symbian also refers to the operating system used by Nokia and Sony Ericsson in their mobile phones.
Surround Sound Processor/Amp - Usually includes power amplification for the one centre speaker and two surround speakers in a home theatre system.
Resolution - The level of resolution directly affects picture quality. The higher the resolution, the more picture detail there is. Many things affect picture quality, including number of bits, pixel count, format, receiver quality, cameras, lenses and lighting used for live or taped programming. Resolution is measured by the number of pixels displayed. One of the high-definition picture formats is composed of 1080 active lines, and each line is composed of 1920 active pixels. Therefore, each frame has over 2 million (1080x1920=2,073,600) color pixels creating the image. By way of contrast, today's typical analog television is roughly equivalent to 480 active lines, with each line holding about 440 pixels. So, each frame has a little over 200,000 color pixels in use creating the image.
A/D - Electronic device that connects an analog television signal to a digital system.
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