METHOD, APPARATUS, AND MANUFACTURE FOR BEAMFORMING WITH FIXED WEIGHTS AND ADAPTIVE SELECTION OR RESYNTHESIS
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
priority date (Note) -
Abandoned
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Abstract
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.
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