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Spatial audio array processing system and method

專利號
US11997474B2
公開日期
2024-05-28
申請人
Wave Sciences, LLC(US SC Charleston)
發(fā)明人
James Keith McElveen; Gregory S. Nordlund, Jr.; Leonid Krasny
IPC分類
H04S7/00; H04R1/40
技術(shù)領(lǐng)域
audio,acoustic,or,in,sound,green's,spatial,may,target,processing
地域: SC SC Charleston

摘要

A spatial audio processing system operable to enable audio signals to be spatially extracted from, or transmitted to, discrete locations within an acoustic space. Embodiments of the present disclosure enable an array of transducers being installed in an acoustic space to combine their signals via inverting physical and environmental models that are measured, learned, tracked, calculated, or estimated. The models may be combined with a whitening filter to establish a cooperative or non-cooperative information-bearing channel between the array and one or more discrete, targeted physical locations in the acoustic space by applying the inverted models with whitening filter to the received or transmitted acoustical signals. The spatial audio processing system may utilize a model of the combination of direct and indirect reflections in the acoustic space to receive or transmit acoustic information, regardless of ambient noise levels, reverberation, and positioning of physical interferers.

說明書

Further objects of the present disclosure provide for a spatial audio processing system to overcome deficiencies associated with prior art single channel noise reduction techniques that are ineffective against noises that have similar time-frequency distributions as the target source.

Further objects of the present disclosure provide for a spatial audio processing system to overcome deficiencies associated with prior art multi-channel noise reduction techniques that require noise references constrained to a limited number of situations.

Further objects of the present disclosure provide for a spatial audio processing system to overcome deficiencies associated with prior art multi-channel techniques, such as beamforming and blind source separation, that require a large number of microphones and additional prior knowledge—such as spatial locations of each element in the array of transducers, noise statistics of the current acoustic space, transducer array calibration, target source location(s), and noise source location(s).

Further objects of the present disclosure provide for a spatial audio processing system to overcome deficiencies associated with prior art computational auditory scene analysis techniques that require relatively higher SNR levels or other knowledge, such as when the target talker is speaking.

權(quán)利要求

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