Ken Warwick and Nigel Lythgoe, the two executive producers of American Idol, have backed out of producing the Emmys telecast in September, the TV academy announced Friday. The pair said that their current commitments and demanding schedule would prevent them from devoting "the creative energy and time necessary to make the Emmys outstanding." At the same time, the academy announced that Ken Ehrlich, who had produced three previous Emmy Awards shows, had agreed to produce a fourth. The 59th Primetime Emmy Awards show is set for Sept. 16.