ANSI LumensBenefit: A measure of brightness defined as the light reflected off the surface of the object being viewed. Calculated in accordance with The American National Standards Institute (ANSI) guidelines which include measuring the brightness of a projected image at 9 points within the screen and averaging the results.Provides an accurate indication of projector brightness. Automatic Keystone Correction benefit: Adjusts for the Keystone Effect - a trapezoidal skewing of a projected image as when the bottom of an image appears smaller than the top. Found in all projectors this results from thepositioning of the projectors base at a lower level than the center of the screen for an upward projection angle. With Automatic Keystone Correction sensors detect the projectors angle in relation to the screen and correct for tilts of 15 degrees. Ensures rectangular images for more accurate betterquality projections. Brightness benefit: Measured in ANSI lumens and lux for LCD projectors. The number of lumens indicates the brightness of the light emitted by a source such as an incandescent or fluorescent bulb. Lux (lx) refers to the brightness of the screen as perceived by the human eye. Provides an accurate indication of image clarity and visibility. Compression benefit: Converts 1280 x 1024 dot SXGA signals or 1600 x 1200 dot UXGA signals to 1024 x 768 dot XGA signals by removing dots every few lines. The lines are then compressed to smooth transitions over the missing segments. Ensures a clean picture from lower resolution source materials. Contrast Ratio benefit: The proportion between the brightest and darkest section of an image. The higher the contrast ratio the clearer the picture. Provides sharp well-defined and clear images. Interlacing benefit: Forms the 30 frames per second that make up a television image. Conventional TV images are interlaced: every frame is divided into two fields each containing every other line of the image. When the two fields appear on ...