mat and the MII format. Color difference signals are NOT component video signals-these are, strictly speaking, the pure R, G and B waveforms. colormonitor CRT that works on the principle of the additive primary colors of red, green and blue. The phosphors of these monitors are tinted with these hues SO that they glow in unique colors when excited with electrons beamed by an electron gun. The phosphor dots inside the visible face of the screen are organized in tightly grouped trios of red, green and blue; each trio is a pixel. colorshift The unwanted changing of colors caused when too few bits are used to express a color. color space The three properties of brightness, saturation and hue can be pictured as a three-dimensional color space. The center dividing line or brightness column is the axis where no color exists at all. Hues (colors) form circles around this axis. There is also a horizontal axis that describes the amount of saturation. Highly saturated colors are closest to the center and less saturated colors are arranged toward the outer edges. color subcarrier The NTSC color subcarrier conveys color information and has a frequency of 3.579545 MHz. Color saturation is conveyed via signal amplitude and hue (tint) is conveyed via signal phase. colortiming The synchronization of the burst phase of two or more video signals to ensure that no color shifts occur in the picture. combfilter An electrical filter that separates the chroma (color) and luma (brightness) components of a video signal into separate parts. It does this by passing some Glossary of Terms frequencies and rejecting others in between. Using a comb filter reduces artifacts but also causes some resolution loss in the picture. S-Video permits a video signal to bypass a comb filter, and thereby results in a better image. common carrier A telecommunications operating company that provides specific telephony services. compact disc CD. Information is stored on a CD's surface SO that when it is scanned the fluctuations in the surface create two states: