By eHow Electronics Editor
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Perhaps you've seen that annoying second picture on a TV screen floating around interfering with a TV show. You can see just a slight hint of another show superimposed on to the show you are watching. It is called ghosting, where a second show, blurry as it may be, appears on the wrong channel. Digital signals have helped stop the frequency of these unwanted screen invaders, but they still are a pain on the eyes.