Patent ID: 8879750
Filing Date: 2014-11-04
Classification: H03G

Abstract:
1. A method for conditioning an audio signal, comprising the steps of: receiving at least one audio signal, each audio signal having at least one channel, each channel being segmented into a plurality of frames over a series of time; calculating a long term dynamic behavior of the audio signal over at least one of the frames; comparing the long term dynamic behavior to a predetermined target value; filtering the audio signal into a plurality of subbands, each frame being represented by at least one subband; measuring at least one short term dynamic behavior in each of the subbands; analyzing the short term dynamic behavior of the frame to determine if a transient exists in the frame; deriving a dynamic gain based on each measure of short term and long term dynamic behavior; detecting a transient in the frame and, after the transient has been detected, then comparing a crest factor to a target crest factor threshold; and determining that the crest factor is lower than the target crest factor threshold and then increasing the dynamic gain to each subband having transients to attain a desired crest factor value.