Patent ID: 7162420

Claim:
A system for processing one or more input signals, the system comprising: a first processor having one or more channels, each channel comprising a respective first processor filter, each channel configured to receive a respective one of the one or more input signals, wherein the first processor is configured to provide an intermediate output signal; a second processor comprising a second processor filter configured to receive the intermediate output signal and provide a noise-reduced output signal; a first adaptation processor coupled to the first processor, wherein the first adaptation processor adapts the first processor filter in each of the one or more channels in response to a variation of a power spectral density (PSD) of a noise signal portion of respective ones of the one or more input signals, and wherein the first adaptation processor does not respond to variations of the power spectral density of a desired signal portion of respective ones of the one or more input signals; and a second adaptation processor coupled to the second processor.