Separation of a mixture of acoustic sources into its components
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United States of America Patent
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Nov 13, 2001
Grant Date -
N/A
app pub date -
Oct 17, 1997
filing date -
Nov 12, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for processing a composite acoustic signal to reconstruct an acoustic signal that substantially matches a selected one of a plurality of sources. A plurality of microphones positioned at different spatial locations detect. variations in sound pressure level resulting from the activity of a plurality of acoustic sources at different locations. The outputs of the microphones are sampled and digitized, and the resulting digital waveform from each microphone is provided as an input to a corresponding filter bank. The outputs of the filter banks are input to a comparison unit. A comparison control unit generates 'signature' information that characterizes each source with respect to the microphones. The comparison unit receives 'signature' information of a selected source from the comparison control unit and provides an output to a synthesizer unit which produces a synthesized digital waveform for the selected source. Optionally, the synthesized digital waveform is input to a digital-to-analog (D/A) converter to generate an analog signal of the reconstructed source.
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