A method and a text subtitle decoder for decoding a text subtitle stream recorded on a recording medium are disclosed. A subtitle loading buffer initially loads a text subtitle stream including a dialog style segment defining a group of region styles and a dialog presentation segment having dialog presentation...http://www.google.com.tw/patents/US7561780?utm_source=gb-gplus-share專利 US7561780 - Text subtitle decoder and method for decoding text subtitle streams