| 摘要 |
PURPOSE:To enable synthesizing a video without providing the multiplying and addition circuits of a video signal by writing a video in a video memory and operating a reading address. CONSTITUTION:Plural video signals are written into memories A-N parts 4, 5, 6 respectively and when a reading out address generation part 8 judges from which memory a video should be read by a priority signal showing which has priority compared with others when the level of a key signal to be inputted and plural keys are inputted and superposed. Thus, since the video signal read from the memory A to N parts 3, 4, 5 can be switched by the level of a key signal, the device has a function for a video synthesizer. |
