| 摘要 |
PURPOSE:To obtain a printed image without disturbance of an input video signal by employing a common single clock for writing/reading an image memory, and providing an overlay memory separate from a printing image memory as an image memory, and overlay data inserting means at the rear stage of the image memory. CONSTITUTION:If a hand-written character is desired to be overlaid to be printed on an image, a telop is formed, imaged by a video camera, and input from an input terminal 151, 152 or 153. A Y signal decoded by a decoder 3 is clamped by an A/D preprocessor 6, converted by an A/D converter 71, and recorded in an overlay memory in an image memory 8 as ON, OFF signals '0', '1'. Then, when the memory is set in a reading state, the content of the memory 8 is D/A-converted, and regulated by a regulator 11. On the other hand, the content of the overlay memory and a color signal determined by a color selector 12 are input to an overlay inserting circuit in the regulator 11, a video signal and a color signal are switched t the timing of the signal from the overlay in the overlay inserting circuit to form an overlaid video signal. |
