Patent ID: 8488811
Filing Date: 2013-07-16
Classification: H03G

Abstract:
1. A method for limiting peaks in an audio signal, wherein the method comprises: receiving an input audio signal; detecting excursions of the input audio signal that exceed a threshold; calculating a first gain in response to the detected excursions, wherein changes in the first gain are limited to a first rate of change; applying the first gain to the input audio signal to generate an intermediate audio signal; applying a delay line to the intermediate audio signal to generate a delayed intermediate audio signal; identifying one or more peak values of the intermediate audio signal within the delay line that exceed the threshold; calculating a second gain in response to the identified one or more peak values, wherein changes in the second gain are limited to a second rate of change that is higher than the first rate of change; and applying the second gain to the delayed intermediate audio signal to generate an output audio signal whose peak values do not exceed the threshold.