| 摘要 |
<p>PURPOSE:To make sure composite photographing, by terminating the reproducing being performed by a head at the moment when the frequency component of one of pilot signals is not detected, and shifting the reproducing mode to the recording mode when the head is switched to the next head. CONSTITUTION:A head reproducing signal is supplied to a terminal 51 and inputted in a frequency converter 53 through an LPF52. Reproducing level differences Fa and Fb of pilot signals from the right and left adjacent tracks are extracted through BPFs 54 and 55 and supplied to peak detecting circuits 56 and 57. Outputs of the circuits 56 and 57 are used for the tracking servo from a terminal 60 through a subtractor 58 and, at the same time, supplied to comparators 61 and 62. The output of an AND circuit 63 is inputted in a detector 70. A head switching signal inputted in a terminal 32 is fed to a pulse generator 67 and a temporary stop releasing signal is supplied to a counter 65 through a terminal 66. The detector 70 is composed of a microcomputer and outputs a recording restart command. Therefore, the disturbance in a picture at the composite photographing section can be prevented.</p> |
