| 摘要 |
<p>PURPOSE:To stabilize tape running control during reproduction and to obtain a normal reproduced picture by recording a control signal synchronously with the angle of rotation of a capstan. CONSTITUTION:When a capstan driving circuit 4 drives a capstan motor 3 intermittently during video recording, the capstan 2 rotates associatively with the motor 3 to run a magnetic tape 1. An angle sensor 5 supervises the angle of rotation of the capstan 2 and transmits a pulse to a control signal recording circuit 6 every time the capstan 2 rotates by 32 deg.. The circuit 6 when inputting the pulse records the control signal on the tape 1 through a control head 7. The angle of rotation of the capstan 2 is proportional to the running distance of the tape 1, so the control signal is recorded at equal intervals. Therefore, even when intermittent recording is performed, the tape running control is performed stably during reproduction to obtain the normal reproduced picture.</p> |
