| 摘要 |
PURPOSE:To simplify wiring between a sequential switcher and a video by connecting plural video cameras to a loop-through for the sequential switcher. CONSTITUTION:Plural video cameras 11-14 are connected to signal switching circuits 15-18 composed of respective analog switches and these switching circuits 15-18 are liked and connected to camera selecting signal receiving circuits 19-22. For a sequential switcher 23 and the video cameras 11-14, a video signal and a camera selecting signal are connected to the loop-through. When a video camera 12 is selected, a code signal to select the camera 12 from the switcher 23 is transmitted to the camera selecting signal receiving circuits 19-22. Since the above-mentioned code signal is selected and detected by a receiving circuit 20 of the camera 12, a switching circuit 16 only is switched to the video camera 12 side. As the result, the output signal of the camera 12 is inputted into a video monitor 24 through the switcher 23.
|
