| 摘要 |
PROBLEM TO BE SOLVED: To reduce sound quality degradation when small amplitude suddenly becomes large.SOLUTION: An audio processing device includes: audio delay means for delaying an inputted audio signal; amplitude variation means for varying amplitude of delayed audio signal with a given gain value; level detection means for detecting amplitude level of an inputted audio signal; gain decision means for deciding gain of the amplitude variation means so that an amplitude level of the audio signal becomes constant; gain value delay means for delaying a gain value outputted by the gain decision means; gain control means for providing a gain value to the amplitude variation means according to the delayed gain value; and control means for varying a delay time of the gain value delay means according to a period of positive/negative sign change of an inputted audio signal if the inputted audio signal has positive/negative values. |
