The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2026
Filed:
Sep. 13, 2023
Amazon Technologies, Inc., Seattle, WA (US);
Ian Ernan Liu, San Diego, CA (US);
Robert Ayrapetian, Morgan Hil, CA (US);
Pradeep Kumar Govindaraju, San Jose, CA (US);
Madhuri Saraf, Sunnyvale, CA (US);
Carlo Murgia, Santa Clara, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
A system that improves beam cancellation by refining reference beam selection and dynamically controlling an adaptation speed of adaptive filters. For example, a device may control the adaptation speed by dynamically determining a variable step-size parameter based on a relative strength of a microphone signal and/or a signal-to-noise ratio (SNR) value associated with an individual beam. The device may compare current energy levels of the microphone signal to a range of energy levels to determine a microphone step-size value, track a minimum noise floor to determine an SNR step-size value, and determine the variable step-size parameter using a sigmoid curve. Additionally or alternatively, the device can use a hybrid approach to select reference beams and can perform neighbor exclusion to further protect speech. For example, the device may exclude reference beams that are adjacent to a target beam to prevent the speech from being represented in the reference beams.