Patent ID: 8223989

Claim:
A signal processing system for processing a plurality of channel signals supplied from an array of sensors of different operating characteristics, comprising: a plurality of analysis filter banks that respectively receive said channel signals from said sensors, wherein each analysis filter bank decomposes the received channel signal into a plurality of subband-channel signals of different frequencies; a plurality of multi-channel equalizers corresponding in number to said subband-channel signals decomposed by each analysis filter bank, wherein each multi-channel equalizer receives a plurality of subband-channel signals of same frequency from all of said analysis filter banks and produces a plurality of calibrated subband-channel signals; and a plurality of synthesis filter banks that respectively receive said calibrated subband-channel signals of different frequencies from all of said multi-channel equalizers, wherein each synthesis filter bank composes the calibrated subband-channel signals into a calibrated channel signal, wherein each of said multi-channel equalizers comprises calibration circuitry that determines a reference value from the received subband-channel signals, equally splits said subband-channel signals into first copies of said subband-channel signals and second copies of said subband-channel signals, and produces calibrated subband-channel signals that are equal to said first copies normalized respectively by average values of said second copies and scaled by said reference value.