METHOD, APPARATUS, AND MANUFACTURE FOR BEAMFORMING WITH FIXED WEIGHTS AND ADAPTIVE SELECTION OR RESYNTHESIS

摘要

A method, apparatus, and manufacture for beamforming is provided. Parameters based on sets of pre-determined beamforming weights are stored. Each of the sets of pre-determined beamforming weights has a corresponding integral index number. Each input microphone signal is transformed to the frequency domain to provide a corresponding transformed signal. Each of the transformed signals includes a plurality of subbands. Next, an index number is determined representing an optimal set of beamforming weights for the transformed signals. Then, a set of beamforming weights is applied to each subband of each of the transformed signals to provide a weighted signal. The set corresponds to the determined index number. A time domain signal is then provided by combining each of the weighted signals.

主权项

1. A method for beamforming, comprising:
storing a plurality of parameters that are based, at least in part, on a plurality of sets of pre-determined beamforming weights, wherein each of the sets of pre-determined beamforming weights has a corresponding integral index number; for each input microphone signal of a plurality of input microphone signals, transforming the input microphone signal to the frequency domain to provide a corresponding transformed signal, wherein each of the transformed signals includes a plurality of subbands; determining an index number representing an optimal set of beamforming weights for the transformed signals; for each subband of each of the transformed signals, applying a set of beamforming weights that corresponds to the determined index number to provide a weighted signal; and providing a time domain signal by combining each of the weighted signals.