| 摘要 |
PURPOSE:To obtain a magnified picture corresponding to a magnified size by using a readout clock with a frequency different from a frequency of a write clock so as to read out a picture data written in a storage means through the use of a prescribed write clock while applying repetitive processing. CONSTITUTION:A readout control circuit 6 reads out a picture data after repetitive processing via a selector 43 from line buffers 41, 42 as it is or while applying repetitive processing as required. A clock generating circuit. 7 consists of a couple of frequency dividers 71, 72 generating write and readout clocks. The frequency divider 72 generates a write clock synchronously with a picture input clock by applying 1/4 frequency division to the original oscillation clock, while the frequency divider 71 applies 1/3 frequency division to the original oscillation clock to generate the readout clock having a clock period with 75% of the write clock. |
