Microphone array subset selection for robust noise reduction
A microphone and channel technology, which is applied in the field of signal processing and can solve the problem of inability to directly obtain noise references.
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[0063] This description includes the disclosure of systems, methods, and apparatus that use information about the distance between microphones and the correlation between frequency and phase difference between the microphones to determine a particular frequency of a sensed multi-channel signal Whether the component originates within or outside the range of allowable inter-microphone angles. This determination can be used to distinguish between signals arriving from different directions (e.g., so that sounds originating within the range are preserved while sounds originating outside the range are suppressed) and / or between near-field signals and distinguish between far-field signals.
[0064] Unless expressly limited by the context, the term "signal" is used herein to indicate any of its ordinary meanings, including a memory location (or collection of memory locations) as expressed on a wire, bus, or other transmission medium state. Unless expressly limited by the context, th...
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