ABSTRACT
The basic process of television transmission is the same as that of radio. The major difference, of course, is that television involves visual (picture) information. This chapter starts with visual perception—how our eyes and brains make use of light. It discusses the video signal—the conversion of light into an electronic analog. The chapter looks at the television channel—the band of frequencies that carries the video signal and its various accessories. It discusses how the television receiver makes use of that channel. Finally, we discuss the various modes of transmitting and receiving the TV channel—wireless and wired distribution—and the mechanics of some alternative video services. Three main parts of the color television camera help create the video signal—the lens, the internal optical system, and the video pickup.
