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How do digital cameras transmit live pictures?

How do digital cameras take pictures and then transmit them live to digital T.V.’s?
Mike Saba from Hampshire (age 5-14)


One Response

  1. Hi Mike,

    Digital cameras use an electronic sensor to break a picture up into millions of little squares. The colour of each square is compared to a huge table of all the different colours, and the number that relates to that colour is stored in the camera. A long list of all of these numbers is sent down the cable to the TV as a series of on-off pulses, using a code called “binary”. The TV reads each number in turn and rebuilds the colour of every little square in the right order to make up the picture that the camera saw originally. Because electronics is so fast, this process can be carried out many times each second, giving a “live” picture on-screen.

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