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US 2013/0279718 A1Published application
Mixer with adaptive post-filtering
AssigneeQNX Software Systems Limited
InventorPhillip A. Hetherington
Life of this patent
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Abstract
A noise reduction system includes multiple transducers that generate time domain signals. A transforming device transforms the time domain signals into frequency domain signals. A signal mixing device mixes the frequency domain signals according to a mixing ratio. Frequency domain signals are rotated in phase to generate phase rotated signals. A post-processing device attenuates portions of the output based on coherence levels of the signals.
Claims29
1-24. (canceled)
A noise reduction system comprising:
- a signal mixing device configured to:
- mix input signals according to a mixing ratio;
- and
- constructively add the input signals to generate an output,
- where the mixing ratio is based on a magnitude and a signal-to-noise ratio of the input signals.
2 more elements
A noise reduction system, comprising:
- means to mix a plurality of input signals according to a mixing ratio,
- where the means to mix constructively adds the plurality of input signals in response to the mixing ratio to generate an output, and
- where the mixing ratio is based on a magnitude and a signal-to-noise ratio of the signals.
Dependencies are inferred from the claim text.