A content providing system includes a content distribution server and a content receiving terminal connected to each other through a communication channel. The content receiving terminal includes an operation input unit specifying one point on a line, a time information output unit outputting the specified...http://www.google.com.hk/patents/US8135700?utm_source=gb-gplus-share專利 US8135700 - Content providing system, content providing apparatus and method, content distribution server, and content receiving terminal
