{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9691407","patent":{"patent_number":"US-9691407","title":"Noise reduction apparatus, noise reduction method, and noise reduction program","assignee":null,"inventors":[],"filing_date":"2014-08-15T00:00:00.000Z","publication_date":"2017-06-27T00:00:00.000Z","cpc_codes":["G10L","G10L","G10L"],"num_claims":7,"abstract":"A noise reduction apparatus according to the present invention includes: a sudden sound information storage unit that stores an input signal that are input before a current input signal is input as sudden sound information, the input signal having a signal level of voice components equal to or smaller than a predetermined threshold and including a sudden sound to be suppressed; a phase difference calculation unit that calculates a phase difference between the sudden sound information and a sudden sound in the current input signal based on a maximum value of a correlation value between the sudden sound information and the current input signal; an addition signal generation unit that shifts a phase of the sudden sound information based on the phase difference to generate an addition signal; and a sudden sound suppression unit that adds the addition signal and the current input signal to output an output signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Noise reduction apparatus, noise reduction method, and noise reduction program","description":"A noise reduction apparatus according to the present invention includes: a sudden sound information storage unit that stores an input signal that are input before a current input signal is input as su","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9691407","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-9691407","citation_suggestion":"Patentable. \"Noise reduction apparatus, noise reduction method, and noise reduction program\" (US-9691407). https://patentable.app/patents/US-9691407","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9691407","json":"https://patentable.app/api/llm-context/US-9691407","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T18:31:41.616Z"}