Pan, tilt and zoom sensors are coupled to a broadcast camera in order to determine the field of view of the broadcast camera and to make a rough estimate of a target's location in the broadcast camera's field of view. Pattern recognition techniques can be used to determine the exact location of the target...http://www.google.com/patents/US5917553?utm_source=gb-gplus-sharePatent US5917553 - Method and apparatus for enhancing the broadcast of a live event
