| 摘要 |
<p>PURPOSE:To obtain a noiseless reproducing image with simple constitution at the time of reproducing a still image and reproducing an intermittent slow- motion image by obtaining a bit pattern with (n) bits with a sampling means binarizing based on the central value of a tracking error signal and controlling a magnetic tape stopping device. CONSTITUTION:An FG pulse in proportion to a motor rotation speed-and a PG pulse showing a rotation phase are inputted to a control circuit 1 from a cylinder motor 3. A regenerative signal from a rotary head whose pilot signal is inputted to a tracking error detection circuit 8 through an LPF 7. To the circuit 8, S1, S2 signals and an inverse signal are inputted from the circuit 1, and the tracking error signal is formed from a regenerative pilot signal and outputted to the circuit 1. A video signal is formed by a video circuit 9 from the regenerative signal. On the other hand, by the circuit 1, the bit pattern is read from a magnetic tape 4 and compared with six patterns. When they coincide, the correction time of a control signal from a drive circuit 6 controlling the drive of a capstan motor 5 is decided by the circuit 1. An off time is calculated by adding the correction time to an off signal generation time, and the motor 5 is controlled.</p> |
