| 摘要 |
<p>PURPOSE:To obtain the slow-reproduction picture of high fidelity with few screen deflections and noises, by alternately repeating slow reproduction to drive a capstan motor with plural pulse trains and still reproduction and execut ing the slow reproduction with variable speed. CONSTITUTION:When a prescribed number of pulses is inputted from an oscilla tor 120, the output of a counter 122 becomes an H, and a counter 121 is reset and then starts counting. Since the output of the counter 121 becomes an L, and AND gate 108 is opened, a driving wave is inputted to a capstan motor 81 as well, and the motor 81 starts rotation. At such a time, the signal of the L is inputted to a head moving amplitude adjusting terminal 79 as well, and a head moving amplitude becomes the value at a slow time from a still time, and the slow reproduction is re-started. By repeating these operations, the low- speed rotation of the motor 81 is made into the stable one without unevenness, the time base fluctuation of reproduced horizontal synchronizing signals propor tionate to speed difference, and the reproduction with few screen noises and deflections can be executed.</p> |
