| 摘要 |
<p>PURPOSE:To attain even the program-search of a video signal with reproduction by bringing the mode into the reproducing state by detecting tape loading, bringing the mode into the fast forwarding reproduction when no video signal is outputted and bringing the mode into the reproducing state when the video signal is outputted. CONSTITUTION:When a tape is loaded to a magnetic tape video recording and reproducing device, a detection circuit 4 detects it, a control circuit 5 is driven by its output, a switching circuit 6 is turned on to activate an instruction circuit 8 and a reproducing circuit 9 brings the device into the reproducing state. Moreover, a switching circuit 11 is turned on by the output of the detection circuit 4, an amplifier circuit 12 is driven to amplify the output of an output circuit 10. Moreover, a comparator 13 compares the output of the amplifier circuit 12 and when an envelope is outputted, the instruction circuit 8 is operated and the device continues the reproducing state by the circuit 9. When no envelope is outputted conversely, the circuit 8 instructs the fast forwarding mode and the device is brought into the fast forwarding reproducing state. Then the device is brought into the reproduction state when the envelope is outputted.</p> |
