HDTV - High-Definition Television. Refers to video with resolution that is substantially higher than traditional television systems. HD has one to two million pixels per frame. Early HDTV broadcasting used analog techniques, but today HDTV is digitally broadcasted using video compression. HDTV has a screen ratio of 16:9 as compared with most of today's TV screens, which have a screen ratio of 4:3. HDTV offers reduced motion artifacts and 5.1 independent channels of CD-quality stereo surround sound.

DLP - Digital Light Processing. DLP is based on a digital micro mirror device (DMD), a chip with millions of hinged, microscopic mirrors attached, each of which corresponds to a single pixel in the projected image. Red, green, and blue light filtered through a color wheel is directed alternately onto the DMD, which switches on and off up to 5,000 times a second. The reflected light is directed through a lens and onto a screen, creating an image. High-endHDTV projectors use a three-chip solution, with separate DMD's for green, red, and blue, and forego the color wheel.

LCD TV - Liquid-Crystal Display. LCD televisions or monitors use liquid crystals that act as "shutters" within the television screen. An LCD television has thousands of small light sources at the rear of the display. A layer of cells containing the liquid crystals is placed between the light sources and the display screen. When the liquid crystal cells are electrified with current, the crystals align and block any light from shining through, or scatter allowing the light to shine through to the screen. LCD monitors typically only display video signals in a progressive scan format. LCD monitors do not use phosphors and are not susceptible to screen burn.

LED TV - Light Emitting Diode. LED TVs are actually a combination of two technologies: LED and LCD. Instead of the conventional fluorescent tube providing the back light for a LCD TV or screen, light is produced by LEDs. There are two types: edge-lit and back-lit. These two system show higher densities of black and each led can be turned off independently.

Plasma Display - A Plasma TV Display uses hundreds-of-thousands of miniature, embedded cells to produce a picture. Each cell equals one pixel, (picture element) and has three sub-cells. The three sub-cells are filled with a plasma gas which will 'glow' red, blue, or green (depending on the phosphor coating) when charged electrically. Light from the three "RGB" sub-cells combines to form a one colored pixel on the screen.  

3D TV - A 3D television employs techniques of 3D presentation, such as stereoscopic capture, multi-view capture or 2D plus depth, and a 3D display with a special viewing device to project a television program into a realistic three-dimensional field.

Pixel - A shortened version of "Picture cell" or "Picture element." Digital TV Pixels are rectangular-shaped, while HDTV Pixels are virtually square- shaped and significantly smaller in size. This allows High-Definition pictures to contain many more horizontal and vertical colored-dots than standard definition pictures.

Component (HD) Video Connection - The output of a high definition video device (such as an HDTV set-top box), or the input of an HDTV receiver or monitor, is comprised of (3) primary-color signals: red, green, and blue - each on a separate wire. The combination of these three signals conveys all necessary picture information. In consumer video products, these (3) separate component signals refer to: Luminance (Y) - for Light; and two Chroma (Color) signals (Pb - blue) and (Pr - red). HDTV-Componentcables and connections are commonly labeled: Y/Pb/Pr.

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