Patent ID: 7778426
Filing Date: 2010-08-17
Classification: H04R

Abstract:
1. A method of processing a sound signal in an audio amplification device using frequency translation, the method including the steps of: (a) receiving an input sound signal, (b) processing the received sound signal into a plurality input spectral components wherein each input spectral component having a corresponding input frequency; (c) determining gains for amplifying a plurality of the input spectral components at their corresponding input frequency, (d) determining a plurality of output spectral components from the amplified input spectral components, each output spectral component having a corresponding output frequency, and said determining step including translating the input frequency of at least one amplified input spectral component to a different frequency to determine a corresponding output frequency for the corresponding output spectral component; (e) predicting, at the input frequencies, an undesired feedback signal component that will result from the amplification and frequency translation of an input spectral component, and (f) correcting the output spectral component of the output signal at its translated frequency to compensate for the predicted undesired feedback signal component.