| 摘要 |
A method and apparatus for limiting an audio signal by establishing a maximum magnitude level that is responsive to a volume control and limiting a reproduced sound to that maximum allowable magnitude level. Limiting circuitry (110, 150) may include analog and digital solutions and may be executed through soft-limiting, hard-limiting, or a combination thereof. A limiter (110, 150) may include circuitry (116) to dynamically detect peak levels in an audio signal. A desired gain may be associated with the audio signal and, if applied, produces a desired peak. This desired peak may be compared to the maximum magnitude level, which may be set relative to a peak acoustic capacity. Audio signal amplification may be set in response to this comparison, such as scaling gain by a ratio of desired peak to maximum magnitude level. |
