| 摘要 |
PROBLEM TO BE SOLVED: To evade a decrease in the gain of an output signal while the speedup of a process is maintained by rounding an inputted digital audio signal although the input digital audio signal is rounded when the number of internal operation bits is limited, their internal operation is performed on a fixed-point basis, and the number of the bits of input data is different from the number of bits usable for the internal operation. SOLUTION: When the internal operation of a CPU and a DSP ends (step S2-3), the digital audio data outputted after the internal operation ends have the bits shifted in the opposite direction from the rounding of the input data (step S2-4) according to the gain of the inputted digital audio data to make a carry, thereby preventing the gain of an output signal from decreasing. |
