| 摘要 |
PURPOSE:To effectively use a memory by setting the operating frequency of a D/A converter for only data read of the memory to two-fold operating frequency of the D/A converter for data write and read of the memory. CONSTITUTION:When still picture output is instructed by a manual operation part 12, switches 15 and 17 are connected to terminals B together, and the clock outputted from a clock generator 13 is directly supplied to a read address generator 11 through the terminal B of the switch 15, and the clock outputted from the clock generator 13 is directly supplied to a D/A converter 6 through the terminal B of the switch 17. Consequently, the address switching period of the read address generator 11 and the operation period of the D/A converter 6 are reduced to halves. That is, the read-out information volume per unit time for only read is twice as large as that for write and read.
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