Acoustic processing device
AssigneeClarion Co., Ltd.
InventorsTakeshi Hashimoto, Toru Hikichi
Life of this patent
Estimating the term…
Abstract
There is provided an acoustic processing device capable of maintaining volume and reproducing audio signals with good sound quality independent of the media audio encoding format, sound source type or sound source volume setting. In the acoustic processing device (1), a limiter control signal generation section (5) generates a limiter control signal for applying rapid variation correction determined based on a short-term signal level variation of an audio signal of a sound source and slow variation correction determined based on a long-term signal level variation of the audio signal of the sound source, and volume control sections (7) and (8) apply the generated limiter control signal to the audio signal and control the volume of the sound source.
Claims3
An acoustic processing device comprising:
- a level signal generation section that generates a first variation signal representing a short-term signal level variation by holding a maximum value in an audio signal input from a sound source detected at a short time interval and a second variation signal representing a long-term signal level variation by holding a maximum value in the audio signal detected at a long time interval;
- a first control signal generation section that generates, based on the signal level variation in the first variation signal, a first control signal for performing rapid variation correction for the signal level of the audio signal;
- a second control signal generation section that generates, based on the signal level variation in the second variation signal, a second control signal for performing slow variation correction for the signal level of the audio signal;
- a limiter control signal generation section that multiplies the second control signal generated by the second control signal generation section and the first control signal generated by the first control signal generation section to generate a limiter control signal capable of adding the rapid variation correction and slow variation correction to the signal level of the audio signal;
- and
- a volume control section that performs volume control of the audio signal by applying the limiter control signal to the audio signal.
Dependencies are inferred from the claim text.