Magnetic recording and reproducing apparatus

Claim 1

A magnetic recording and reproducing apparatus of the type wherein about one field of a television signal for an interlaced scanning system is recorded by a magnetic head on a magnetic recording medium in the form of an annular track, and a static image signal is obtained by repeatedly reproducing the annular track during reproduction, said apparatus comprising a first driving system for rotating a first means selected from said magnetic head and said magnetic recording medium in order to produce a relative speed between said first means and a second means; detecting means for producing electric signals when said detecting means is at a predetermined position with respect to said first means; a second driving system for driving either said second means or said detecting means, centering around the rotating center of said first means, at a definite angular speed corresponding to an odd number times one-half of one horizontal synchronizing signal section of the television signal recorded in said recording medium at one rotating period of said first means; means for separating vertical synchronizing signals from said television signal to be recorded; phase comparator means for comparing the separated vertical synchronizing signals with the output of said detecting means to generate outputs correspond to the phase difference; and control means for controlling said first driving system so that the phase between the output of said detecting means and said vertical synchronizing signal of the television signal may be made the same.