| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound volume correction device capable of reducing the amount of volume correction processing.SOLUTION: A buffer part 11 has a storage region capable of storing sound input signals for a predetermined period of time. When the storage region has no space, the buffer part 11 overwrites new sound input signals in a storage region where the oldest sound input signals are stored. Every time when all sound input signals stored in the buffer part 11 are replaced with new ones, a gain calculation section 13 calculates the gain based on a representative value of the sound input signals stored in the buffer part 11. A gain limitation section 14 calculates the amount of change between the gain previously calculated by the gain calculation section 13 and the gain calculated this time. When the absolute value of the amount of change is larger than a predetermined first threshold value, a limitation value which is obtained by changing the previously calculated gain by an amount equivalent to a predetermined changing upper limit so that the previously calculated gain gets closer to the gain calculated this time is determined as the gain his time. A gain multiplication section 15 multiplies the gain which is set by the gain calculation section 13 and a gain limitation section 14 by a sound input signal read out from the buffer part 11 and outputs the same. |
