Multiband compressor
In a multiband compressor 100 , a level calculation unit 121 calculates a signal level inputted for each of bands, a gain calculation unit 122 calculates a gain value from the calculated signal level, and a gain limitation unit 130 limits a gain value by comparison with a gain value of the other band in a compressor for each band. With this configuration, provided is a multiband compressor capable of achieving a balance between the quality of sound and the effect of enhancing the sound level at a high level.
1. A multiband compressor that splits an audio signal by plural frequency bands, subjects the audio signal to a dynamics compression process for each of the frequency bands, synthesizes the subjected audio signal, and outputs the synthesized audio signal, comprising
a level calculation unit that calculates a signal level inputted for each of the bands;
a gain calculation unit that calculates a gain value from the calculated signal level; and
a gain limitation unit that limits the gain value by comparison with a gain value of the other band in a compressor of each of the bands,
wherein the gain limitation unit multiplies a difference in the gain values between the band to be processed and a nearby band by a weight coefficient, obtain a sum total thereof, and adds the sum total to the gain value of the band to be processed.
2. The multiband compressor according to claim 1 , wherein the gain limitation unit limits the gain value in such a manner that the gain value on a high frequency band side is less than or equal to the gain value on a lower frequency band side.