| 摘要 |
PURPOSE:To improve data comparison processing efficiency by providing bypass means to the circulation circuit of shift registers. CONSTITUTION:Series input-series output type shift registers SR4, SR5 of 6-, 5-bit constitution for circulation delaying as bypass means are disposed in one circulation path out of the two circulation paths of the series input-series output type shift registers SR1, SR2 which store base visual field data of 48 bits. As a result of this, a sequence control circuit 70 controls select gate circuits 76, 78, 80 and the data of 48 bits concerning the base and reference visual field regions out of the data selected by the select gate circuit 72 are taken into the shift registers SR1, SR2 and are circulated not through the shift registers SR4, SR5. At the same time the rest of the reference visual field data are taken into the shift registers SR3. Thence, the shift register SR1 is changed over to the circulation through the shift register SR4 at the specified timing and the head alignment of the data of the shift registers SR1-SR3 is accomplished. |
