A system and method of adding hyperlinked information to a television broadcast in which an interactive content icon is used. 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...http://www.google.com.hk/patents/US7343617?utm_source=gb-gplus-share專利 US7343617 - Method and apparatus for interaction with hyperlinks in a television broadcast
