In a magnetic recording and reproducing system of the type wherein a plurality of rotating magnetic heads record the video signal on a magnetic tape as tracks which are inclined at an angle relative to the direction of travel of the magnetic tape, the audio signal is time compressed and recorded by the...http://www.google.de/patents/US4303950?utm_source=gb-gplus-sharePatent US4303950 - Helical scan video tape recorder for recording video and audio signals on contiguous tracks
