| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the passing of memory access. SOLUTION: Field memories 2, 3 convert synchronism by selectively writing in, reading out a video signal. A passing predictive circuit 5 predicts that the read-out of the video signal from the field memories 2, 3 passes the write-in ahead to generate a passing predictive signal. A read enable generation circuit 10 generates a read enable signal RE1 forcedly switching the read-out of the video signal from the field memories 2, 3. A memory access switch circuit 11 inverts the read enable signal RE1 only at the timing that the passing occurs by the passing predictive signal to make it a read enable signal RE.
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