Washington - Over one-third (36%) of U.S. television households are unaware of the looming switchover to digital television broadcasting, set to take effect just over a year from now, while "major confusion" exists among the remaining consumers who are aware of the transition, according to a new survey from Consumer Reports National Research Center. An estimated 11% of American homes that rely exclusively on over-the-air analog broadcasts -- or about 23 million people -- will be unable to watch TV at all if they take no action before the switchover to digital.