Patent ID: 7359520

Claim:
A directional signal processing system for beamforming a plurality of information signals, said directional signal processing system comprising: a plurality of microphones; an analog-to-digital convertor for converting a plurality of said information signals from said microphones to a plurality of digital information signals; an oversampled filterbank comprising at least one analysis filterbank for transforming said digital information signals in time domain into a plurality of channel signals in transform domain, and one synthesis filterbank, said oversampled filterbank being a weighted-overlap-add (WOLA) filterbank, said channel signal being a complex-valued, demodulated time-frequency signal; a signal processor for processing the outputs of said analysis filterbank for beamforming said information signals, said synthesis filterbank transforming the outputs of said signal processor to a single digital information signal in time domain; a post-filter provided between said signal processor and said synthesis filterbank; a controller for controlling said post-filter; and a digital-to-analog convertor for converting said single digital information signal to an analog information signal, and at least one of the following: a voice activity detector operably coupled to at least one of said signal processor and controller; a target-to-jammer ration estimator operably coupled to at least one of said signal processor and controller; a signal-to-noise ration estimator operably coupled to at least one of said signal processor and said controller; a combination matrix provided between said analog-to-digital converter and said analysis filterbank for pre-processing of said information signals in time domain; an active noise processor comprising a microphone and a loop filter.