Patent ID: 6975807
Filing Date: 2005-12-13
Classification: G11B,H04N

Abstract:
1. A video tape recorder, comprising: a first head having a plus azimuth angle and a second head having a minus azimuth angle, the first head and the second head being arranged back to back with an interval of 180 degrees, and constituting a first head pair; a third head having a plus azimuth angle and a fourth head having a minus azimuth angle, the third head and the fourth head being arranged back to back with an interval of 180 degrees, and constituting a second head pair; a rotary head cylinder on which the first to fourth heads are arranged in a manner that the first head and the fourth head are positioned close to each other and the second head and the third head are positioned close to each other; a detection means which detects that one of the first head pair and the second head pair goes wrong during a time that a video signal is being recorded on a magnetic tape by using the one of the first head pair and the second head pair; a head change means which performs a head change in response to detection by the detection means so as to continue a video record by using another of the first head pair and the second head pair; and a phase change means which changes a phase of a control signal that is to be recorded on the magnetic tape at a time that the head change is performed.