| 摘要 |
PURPOSE:To allow a TV viewer to confirm whether an image from an antenna input or from another image receiver is projected on a master screen over a look at the image by changing the color of a subordinate screen. CONSTITUTION:A receive video and sound signal from an antenna and a video and sound signal from another video equipment 14 are applied to a switching circuit 16, which outputs the 1st signal to be supplied to a color and video signal processing circuit 17, synchronizing circuit 18, and voice circuit 19 and the 2nd signal to be supplied to a color and video processing circuit 20, synchronizing circuit 21, and voice circuit 22 with the instruction of a switching instruction circuit 15. Then while a subordinate screen framing circuit 26 frames the subordinate screen 3, the output of the switching instruction circuit 15 is connected to a subordinate frame color switching circuit 33, and the frame color of the subordinate screen framing circuit 26 is changed over with the output of the circuit 33. |
