{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9773509","patent":{"patent_number":"US-9773509","title":"Speech probability presence modifier improving log-MMSE based noise suppression performance","assignee":null,"inventors":[],"filing_date":"2016-09-19T00:00:00.000Z","publication_date":"2017-09-26T00:00:00.000Z","cpc_codes":["G10L","G10L","G10L"],"num_claims":5,"abstract":"Acoustic noise in an audio signal is reduced by calculating a speech probability presence (SPP) factor using minimum mean square error (MMSE). The SPP factor, which has a value typically ranging between zero and one, is modified or warped responsive to a value obtained from the evaluation of a sigmoid function, the shape of which is determined by a signal-to-noise ratio (SNR), which is obtained by an evaluation of the signal energy and noise energy output from a microphone over time."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Speech probability presence modifier improving log-MMSE based noise suppression performance","description":"Acoustic noise in an audio signal is reduced by calculating a speech probability presence (SPP) factor using minimum mean square error (MMSE). The SPP factor, which has a value typically ranging betwe","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9773509","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-9773509","citation_suggestion":"Patentable. \"Speech probability presence modifier improving log-MMSE based noise suppression performance\" (US-9773509). https://patentable.app/patents/US-9773509","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9773509","json":"https://patentable.app/api/llm-context/US-9773509","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:33:59.648Z"}