PROBLEM TO BE SOLVED: To improve data-processing accuracy and processing speed by controlling a counter that is provided at each storage cell and increasing or decreasing the number of data that can be subjected to priority processing while continuing to input data. ;SOLUTION: A storage cell 21 compares an old storage data that has already been stored with a new input data, at the same time the data are shifted to the adjacent storage cell 21 for sequencing, and the data are sequenced and writing to each storage cell 21 is processed in synchronization with one clock. Each storage cell 21 has a counter 22, and an initial value is set to the counter 22 when data are written into the storage cell 21. The initial value and the amount of subtraction of the counter 22 can be increased or decreased. For example, a reference value is stored in a memory that has been separately provided, and is compared with the storage data in the storage cell 21, thus increasing or decreasing the initial value and the amount of subtraction when it is necessary to increase or decrease the number of data to be sequenced.;COPYRIGHT: (C)2000,JPO
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