{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9747920","patent":{"patent_number":"US-9747920","title":"Adaptive beamforming to create reference channels","assignee":null,"inventors":[],"filing_date":"2015-12-17T00:00:00.000Z","publication_date":"2017-08-29T00:00:00.000Z","cpc_codes":["G10L","G10L","H04R","H04R","G10L","G10L","H04R","H04R","H04R"],"num_claims":20,"abstract":"An echo cancellation system that performs audio beamforming to separate audio input into multiple directions and determines a target signal and a reference signal from the multiple directions. For example, the system may detect a strong signal associated with a speaker and select the strong signal as a reference signal, selecting another direction as a target signal. The system may determine a speech position and may select the speech position as a target signal and an opposite direction as a reference signal. The system may create pairwise combinations of opposite directions, with an individual direction being selected as a target signal and a reference signal. The system may select a fixed beamformer output for the target signal and an adaptive beamformer output for the reference signal, or vice versa. The system may remove the reference signal (e.g., audio output by the loudspeaker) to isolate speech included in the target signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Adaptive beamforming to create reference channels","description":"An echo cancellation system that performs audio beamforming to separate audio input into multiple directions and determines a target signal and a reference signal from the multiple directions. For exa","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9747920","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9747920","citation_suggestion":"Patentable. \"Adaptive beamforming to create reference channels\" (US-9747920). https://patentable.app/patents/US-9747920","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9747920","json":"https://patentable.app/api/llm-context/US-9747920","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:39:29.269Z"}