| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize various variation in a coefficient submitted to a calculation without requiring any special circuit for determining the coefficient. <P>SOLUTION: A coefficient determination part 6 updates a basic coefficient Cf represented as a fixed point type bit string successively. A selector 3 regards a part of the bit string of the basic coefficient Cf specified by the coefficient determination part 6 as a mantissa part Y and another part as an exponent part E, and outputs a coefficient Cx for calculation obtained by converting the mantissa part Y and the exponent part E. A multiplication part 4 multiplies the coefficient Cx for calculation outputted from the selector 3 by sample data X to be processed and outputs the obtained multiplication data Xt. A shifter 5 applies a bit shift corresponding to the numeral indicated by the exponent part E outputted from the selector 3 to the multiplication data Xt outputted from the multiplication part 4 and outputs the result. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
