A system and method of receiving information hyperlinked to a television broadcast. The broadcast material is analyzed and one or more regions within a frame are identified. Additional information can be associated with a region, and can be transmitted in encoded form, using timing information to identify...http://www.google.com.tw/patents/US7120924?utm_source=gb-gplus-share專利 US7120924 - Method and apparatus for receiving a hyperlinked television broadcast
