A VTR controller provides an internal counter which counts a frame reference to provide a number representing the position of the reference in the video color sequence. This numbr must be synchronized to the color sequence of the station reference in order to be useful. To synchronize the internal counter...http://www.google.ca/patents/US4768102?utm_source=gb-gplus-sharePatent US4768102 - Method and apparatus for synchronizing a controller to a VTR for editing purposes
