Patent ID: 9608584
Date: 2017-03-28
CPC Classifications: G10L,H03G,H04S

Claim:
1. A method for adjusting a level of an audio signal in an audio decoder, the method comprising: dividing an audio signal into a plurality of frequency bands; deriving modification parameters for at least some of the plurality of frequency bands, the modification parameters comprising amplitude scale factors, each amplitude scale factor respectively operating in a frequency band of a plurality of frequency bands and each amplitude scale factor representing an average energy over a frequency band and a time segment; smoothing the modification parameters; deriving gain factors for at least some of the plurality of frequency bands, the gain factors determined from the modification parameters and noise compensation factors, wherein the noise compensation factors are smoothed over time; applying the gain factors to the at least some of the frequency bands; and summing the plurality of frequency bands to generate a combined wideband audio signal, wherein the gain factors are both time and frequency varying.