{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9754605","patent":{"patent_number":"US-9754605","title":"Step-size control for multi-channel acoustic echo canceller","assignee":null,"inventors":[],"filing_date":"2016-06-09T00:00:00.000Z","publication_date":"2017-09-05T00:00:00.000Z","cpc_codes":["G10L","G10L","G10L","H04R","H04R","H04S","G10L","H04R"],"num_claims":20,"abstract":"A multi-channel acoustic echo cancellation (AEC) system that includes a step-size controller that dynamically determines a step-size value for each channel and each tone index on a frame-by-frame basis. The system determines the step-size value based on a normalized squared cross-correlation (NSCC) between an estimated echo signal and an error signal, allowing the AEC system to converge quickly when an acoustic room response changes while providing stable steady-state error by avoiding misadjustments due to noise sensitivity and/or near-end speech. The step-size value can be determined using fractional weighting that takes into account a signal strength of each channel."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Step-size control for multi-channel acoustic echo canceller","description":"A multi-channel acoustic echo cancellation (AEC) system that includes a step-size controller that dynamically determines a step-size value for each channel and each tone index on a frame-by-frame basi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9754605","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-9754605","citation_suggestion":"Patentable. \"Step-size control for multi-channel acoustic echo canceller\" (US-9754605). https://patentable.app/patents/US-9754605","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9754605","json":"https://patentable.app/api/llm-context/US-9754605","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:59:44.314Z"}