NUMERICAL FORMAT CONVERTER

摘要

PROBLEM TO BE SOLVED: To support various fixed point numerical formats and floating point numerical formats and to convert the numerical format from a fixed point to a floating point, from the floating point to the fixed point or from the floating point to the different floating point corresponding to the necessity of a signal processing route. SOLUTION: Digital power exponent signal generation means 12-18 generate digital power exponent signals Ef from input digital signals and a power exponent range and a power exponent offset decided by the numerical format of the input digital signals and the numerical format of output digital signals. Digital mantissa signal generation means 14 and 20-30 generate digital mantissa signals from the input digital signals, the power exponent range and the power exponent offset. At the time, the output digital signals are generated by the digital power exponent signals and the digital mantissa signals when the output numerical format is the floating point and the output digital signals are generated by the digital mantissa signals when the output numerical format is the fixed point format.