Patent ID: 9640168
Date: 2017-05-02
CPC Classifications: G10K

Claim:
1. An audio processor suitable for processing an input signal, comprising: a noise estimator for receiving the input signal and outputting an estimated noise of the input signal; a signal strength processor for receiving an indication of the signal strength of the input signal in terms of the strength of the combination of any noise components and audio information content of the signal and configured to determine a signal strength dependent noise cancellation parameter based on the indication of the signal strength of the input signal; an adaptive noise canceller operatively coupled to the noise estimator and the signal strength processor and configured to provide noise cancellation of the input signal according to an estimated noise from the noise estimator and configured to provide reduced noise cancellation according to the signal strength dependent noise cancellation parameter to provide less noise cancellation to retain more of the noise in the input signal when the input signal has higher signal strength in terms of strength of the combination of any noise components and audio information content of the input signal than when the input signal has lower signal strength; and a dynamic range compressor configured to provide a gain for the input signal adapted according to a signal strength of the input signal, in terms of strength of a combination of any noise components and audio information content of the input signal.