Patent ID: 7917336
Filing Date: 2011-03-29
Classification: G06K,G10L,H03H

Abstract:
1. An apparatus for separating a convolutively mixed signal into a plurality of source signals comprising: a plurality of signal sensors, each sensor residing at a sensor location for sensing a source signal of the plurality of source signals at the sensor location and providing a sensor signal representing the sensed source signal; a multiple input, multiple output signal filter for filtering a convolutively mixed signal, said convolutively mixed signal comprising sensor signals from each of said plurality of signal sensors; means for estimating cross powers of multiple output channels, said cross power being estimated for each of the multiple output channels at multiple times; means for computing a set of source locations r of the plurality of source signals for use in constraining subsequent source separation, each source location of the set of source locations r being defined by spatial relation to the sensor locations; means for adapting the multiple input, multiple output signal filter to minimize the cross powers while enforcing a desired filter response for the set of source locations; and said multiple input, multiple output signal filter filtering the convolutively mixed signal in order to separate the convolutively mixed signal into said plurality of source signals, wherein said filtering utilizes said computed set of source locations r as a constraint in determining separation of the plurality of source signals.