In order to edit commercial messages from an off-the-air video recording of a television signal, method and apparatus are disclosed for automatically operating a video tape recorder (VTR) so that it alternates between a normal forward record mode, and a rewind or backscan mode in response to the detection...http://www.google.es/patents/US4752834?utm_source=gb-gplus-sharePatente US4752834 - Reciprocating recording method and apparatus for controlling a video recorder so as to edit commercial messages from a recorded television signal
Reciprocating recording method and apparatus for controlling a video ...
