Arithmetic processing device, arithmetic processing method, and non-transitory computer-readable storage medium

An arithmetic processing method comprising:

• calculating statistical information of a first operation result by causing to execute a predetermined operation using input data as a first fixed-point number with a first decimal point at a first decimal point position;
• determining a second decimal point position using the statistical information;
• and
• calculating a second operation result when the predetermined operation is executed using the input data as a second fixed-point number with a second decimal point at the second decimal point position.

A non-transitory computer-readable storage medium storing a program that causes a processor included in a noise estimation apparatus to execute a process, the process comprising:

• calculating statistical information of a first operation result by causing to execute a predetermined operation using input data as a first fixed-point number with a first decimal point at a first decimal point position;
• determining a second decimal point position using the statistical information;
• and
• calculating a second operation result when the predetermined operation is executed using the input data as a second fixed-point number with a second decimal point at the second decimal point position.