| 摘要 |
PURPOSE:To shorten a processing time necessary for a mask arithmetic which has to be executed for all data by processing a mask arithmetic for data in parallel as much as possible. CONSTITUTION:When a mask arithmetic is started, one bit corresponding to an input buffer 1 is supplied to a corresponding arithmetic table, and two bits corresponding to line memories 4 and 10 are supplied to said table under control of an address and a lead pulse. In the arithmetic table, the necessary mask arithmetic is executed. After the arithmetic is finished, data of the input buffer 1 and those of the line memory 4 are written in the line memories by one line in picture data are caused to exist in the input buffer 1 and the line memories 4 and 10, and a mask arithmetic is executed for three line picture data delayed by one line. |
