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US 2021/0065686 A1Published application
Multibeam keyword detection system and method
AssigneeKnowles Electronics, LLC
InventorsHarsha RAO, Malakapati Loka Nagendra PRASAD, Hindupur Keerthi SAGAR, Pratik SHAH, Murali Mohan DESHPANDE, John WOODRUFF, Sai Ravi Teja PULUGARTHA, Rohit PATURI
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Abstract
A system and method provides for multibeam keyword detection. A composite audio signal may include sound components. The system and method groups the sound components into subsets based on the angles of arrival of sound components. Keyword detectors evaluate each subset and determine whether a keyword is present.
Claims20
A system for keyword detection comprising:
- an audio input configured to receive a composite audio signal from a microphone array;
- a beamforming engine comprising a plurality of beamformers coupled to receive the composite audio signal and configured to form a plurality of beam signals from the composite audio signal, each of the beam signals having an associated beam angle and comprising audio data corresponding to sounds captured by the microphone array within a range of angles of arrival with respect to the beam angle;
- a keyword detection module having a plurality of keyword detectors, each keyword detector configured to receive a respective one of the plurality of beam signals;
- and
- a multibeam detection engine coupled to receive keyword presence data from all of the plurality of keyword detectors and configured to produce a keyword detection output indicating whether or not a keyword has been detected based on the received keyword presence data.
2 more elements
A method of keyword detection comprising:
- receiving from a microphone array a composite audio signal;
- forming a plurality of beam signals from the composite audio signal, each of the beam signals having an associated beam angle and comprising audio data corresponding to sounds captured by the microphone array within a range of angles of arrival with respect to the beam angle;
- processing, by a plurality of keyword detectors, the plurality of beam signals to detect a keyword in the plurality of beam signals, each keyword detector configured to receive a respective one of the plurality of beam signals;
- and
- processing keyword presence data from all of the plurality of keyword detectors to produce a keyword detection output indicating whether or not a keyword has been detected based on the keyword presence data.
2 more elements
Dependencies are inferred from the claim text.