| 摘要 |
PURPOSE:To display plural pictures in division on the displaying screen by writing the primary and secondary digital video signals in alternate addresses of the line memory to read them alternately and display. CONSTITUTION:The primary-color signals supplied to input terminals 1-3 and 4-6 are supplied alternately to an A/D converting circuit 8 by the switching of switches 7a-7c, and is written in the line memory 9 by the write address signal given through a memory control circuit 70. In the mean time, a write- address counter 11 is sequentially generating the address signals. The data correspondent to the picture A is written in the addresses of the line memory by the address signals in the even number of order and that correspondent to the picture B is by ones in the odd number of order. The data written in the line memory 9 is read out by the read-address signals which the memory control circuit 10 controls to supply, and is outputted through a D/A converting circuit 15.
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