originally scanning electron tubes and, more recently, charge couple device (CCD) solid-state sensors packaged in various forms. Basic- ally, signals from the three sensors are processed to make a mono- chrome picture that monochrome receivers can detect and display, while additional detection and decoding circuitry in color receivers extract the color information and "paint" it on, or into monochrome pictures. Color television leverages the basics of color derived from combinations of the color primaries (RGB) into three secondary colors-cyan, magenta, and yellow. With appropriate mixing, it is also possible to make black, white, and a range of monochrome tones in between, also called a grayscale. Television had its own version of luminance and chrominance. The ability to include color information in the same channel by simply multiplexing the three colors into a signal that enables recovery and representation of the original image has been extended to describing composite color signals as an example of 6:1 compression, 2:1 for interlaced scan, and 3:1 for RGB color into chroma. PRACTICAL IP AND TELECOM FOR BROADCAST ENGINEERING AND OPERATIONS Highly summarized, here's what happens. Light reflected from the scene is separated into three primary colors and scanned. Processing the color information and encoding it into a chrominance signal along with a second synchronizing signal permits the color receiver to decode the color information and pass it to the red, blue, and green electron guns in the display tube, which make color pictures by illuminating red, blue, and green phosphor dots on the face of the display tube. Color signals before encoding are referred to as com- ponent signals. Color signals after encoding into NTSC, PAL, or SECAM are called composite signals. Video signals derived from electron tubes or CCD sensors are analog in nature. The signal is highly structured and based on a precision clock or synchronizing signal making up the display scan structure. After transfer from the sensors, it's proces