ABSTRACT
In this chapter the concepts of image delivery are discussed, beginning with the scanning and synchronizing of monochrome cameras and displays. The concepts of contrast and resolution are discussed, along with an introduction to sampling theory and the two-dimensional spectra of analog video signals. Colour television is considered in Chapter 2. The term 'television' literally means to see at a distance and is generally taken to imply a broadcast. Where there is distance but no public broadcast, such as in security systems, the term 'closed circuit television' (CCTV) is used. In contrast, the term 'video' simply means 'I see'. Consequently we use devices such as video monitors and video recorders whether or not there is a transmission, but we would always use the term television transmitter.
