Patent ID: 6523003
Filing Date: 2003-02-18
Classification: G10L

Abstract:
In a communication system for processing a communication signal derived from speech and noise, apparatus for enhancing the quality of the communication signal comprising:means for dividing said communication signal into a selected number of frequency band signals representing a selected number of frequency bands; and a calculator generating a plurality of initial gain signals having initial gain values for altering the gain of said frequency band signals, each initial gain signal corresponding to a different one of said frequency band signals, each initial gain value being derived from a measurement of the power of at least a portion of one of said frequency band signals, said calculator generating a plurality of modified gain signals having modified gain values, each modified gain signal corresponding to at least one of said frequency band signals and each modified gain value being derived from one or more functions of at least two of said initial gain values, said calculator altering the frequency band signals in response to said modified gain signals to generate weighted frequency band signals and combining the weighted frequency band signals to generate an improved communication signal.