| 摘要 |
<p>PURPOSE:To enlarge a picture which is approximate to an original picture by permitting a space product sum calculating circuit to interpolate data. CONSTITUTION:Multigradation picture data (x-lines X y-lines) is stored. Before data is transferred to a buffer memory 3 from an accessible frame memory 1 on a line basis, a CPU 7 creates an address conversion table in a look-up table LUT 5. Afterwards an address counter 4 is incremented or decremented. An address is given to the buffer memory 3 through a selector 8 and data is written in the buffer memory 3. Then an input from the selector 8 is switched to the LUT 5 from the address counter 4, which is incremented or decremented. An address is given to the buffer memory 3 through the LUT 5 and the selector 8. The space product sum calculating circuit 6 interpolates data outputted from the buffer memory 3. Picture data is written in the frame memory 1 or a display memory 2, and a picture is displayed on a display device 9.</p> |
