e medium storing text-based subtitle, and apparatus and method for processing text-based subtitleUS8498515 *Nov 30, 2006Jul 30, 2013Lg Electronics Inc.Recording medium and recording and reproducing method and apparatusesUS8554053Dec 4, 2006Oct 8, 2013Lg Electronics, Inc.Recording medium storing a text subtitle stream including a style segment and a plurality of presentation segments, method and ap