Patent ID: 6163427
Filing Date: 2000-12-19
Classification: G11B,H04N

Abstract:
A magnetic tape comprising:adjacent inclined tracks which extend obliquely relative to a longitudinal direction of the tape, the inclined tracks being scannable using rotationally drivable magnetic heads;digital video information and digital audio information stored in the inclined tracks;first and second longitudinal tracks extending in the longitudinal direction of the tape;a first control signal having a first frequency being stored in the first longitudinal track for automatically controlling tape speed in accordance with the first frequency during playback by digital playback apparatus adapted to play back the digital information on the tape;a second control signal having a second frequency being stored in the second longitudinal track for automatically controlling tape speed in accordance with the second frequency during any attempted playback of the digital information on the tape using analog playback apparatus operating in accordance with the VHS standard, the second frequency corresponding to an incorrect tape speed when the analog playback apparatus attempts to play back the digital information on the tape in order to avoid undesirable audio output by the analog playback apparatus.