| 摘要 |
PURPOSE:To attain arithmetic of a window function in high speed by using an address of a specific bit and an address of an adder circuit to access respectively a memory unit. CONSTITUTION:The window consists of 2X2-bit to a picture memory. Then memory units 9, 10-12 being of the same number as the bit number in the window are provided. Moreover, registers 3, 4 and 5 storing the difference between an address of the specific bit in the window and an address of other bits are provided. Adder circuits 6, 7 and 8 adding specific bits at write/read of the memory units are provided. Then the memory units 9-12 are accessed respectively by using the address of the specific bit and the address of the adder circuits 6-8. Thus, all bits in the window of the picture memory are read by one accessing and the result is outputted via a ROM13. |
