A magnetic recording and reproducing apparatus capable of recording video, audio and other information on a magnetic tape by, for example, the helical scanning method. A rotary head is rotated at an m-fold speed to record intermittent tracks on the magnetic tape so that real-time simultaneous monitoring...http://www.google.com.au/patents/US5481414?utm_source=gb-gplus-sharePatent US5481414 - Magnetic recording and reproducing apparatus including a track scanning device for causing a single magnetic head to scan at least two tracks during a period of time corresponding to one cycle of information to be continuously recorded on a magnetic tape
