| 摘要 |
PURPOSE:To obtain a multiplex transmission system with less noise and deterioration in picture quality, by switching alternately video signals of plural cameras at each horizontal scanning for outputting the signal on a transmission line. CONSTITUTION:The 1st camera 1 and the 2nd camera 2 are operated by inserting the same synchronizing signal. A video signal mixing circuit 3 mixes the video signal of the camera 1 with that of the camera 2, the two video signals are switched alternately at each horizontal scanning, and the mixed video signal is transmitted on a transmission line 4. A video switching circuit 5 extracts the transmitted video signal at every other horizonal scanning period and this signal is mixed with a signal delayed by one horizontal scanning period and outputted. |
