CHAPTER 6

TV CAMERAS AND ANALOGUE COLOUR ENCODING

Ultimately the transmission of a full colour TV picture requires three separate and simultaneous streams of information; those for the red, the blue and the green light components of the picture. Although these signals exist at each end of the chain (i.e. at the pick-up and display tubes) they are seldom conveyed along separate channels, even where the link is a short one consisting merely of cable. The reasons for this are many: much of the information in the three channels is identical, completely so on black-and-white scenes; the human eye is insensitive to coloured detail and discerns most fine detail as a black-and-white image; the channels available for transmission of a TV signal (whether ...

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