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Electron Beam

An electron beam is a flow of electrons generated in a cathode ray tube (CRT) by an electron gun. The beam is aimed at the back of the screen, where the electrons excite phosphors and cause them to glow in various colors.

EDTV (Enhanced Definition TV)

EDTV is a video display that uses progressive scanning (non-interlaced). Progressive scanning still displays 480 lines per frame, like interlacing does, but the lines are painted in order (1, 2, 3, etc.) in one frame. An interlaced frame is made up of two fields; the first field paints the odd-numbered lines, then the second field paints the even-numbered lines. Because progressive scanning paints an entire frame in one pass, image quality is much better than an interlaced image.