Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate
2011-08-23
2011-08-23
Faulk, Devona (Department: 2614)
Electrical audio signal processing systems and devices
Directive circuits for microphones
C381S094100, C381S094300, C367S118000, C367S119000, C704S226000, C704SE15015, C704SE21002, C702S190000
Reexamination Certificate
active
08005237
ABSTRACT:
A novel beamforming post-processor technique with enhanced noise suppression capability. The present beam forming post-processor technique is a non-linear post-processing technique for sensor arrays (e.g., microphone arrays) which improves the directivity and signal separation capabilities. The technique works in so-called instantaneous direction of arrival space, estimates the probability for sound coming from a given incident angle or look-up direction and applies a time-varying, gain based, spatio-temporal filter for suppressing sounds coming from directions other than the sound source direction resulting in minimal artifacts and musical noise.
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Acero Alejandro
Tashev Ivan
Faulk Devona
Lyon Katrina A.
Lyon & Harr LLP
Microsoft Corp.
Paul Disler
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