{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8532986","patent":{"patent_number":"US-8532986","title":"Speech signal evaluation apparatus, storage medium storing speech signal evaluation program, and speech signal evaluation method","assignee":null,"inventors":[],"filing_date":"2010-03-24T00:00:00.000Z","publication_date":"2013-09-10T00:00:00.000Z","cpc_codes":["G10L","G10L"],"num_claims":16,"abstract":"A speech signal evaluation apparatus includes: an acquisition unit that acquires, as a first frame, a speech signal of a specified length from speech signals; a first detection unit that detects, on the basis of a speech condition, whether the first frame is voiced or unvoiced; a variation calculation unit that, when the first frame is unvoiced, calculates a variation in a spectrum associated with the first frame on the basis of a spectrum of the first frame and a spectrum of a second frame that is unvoiced and precedes the first frame in time; and a second detection unit that detects, on the basis of a non-stationary condition based on the variation in spectrum, whether the variation of the first frame satisfies the non-stationary condition."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Speech signal evaluation apparatus, storage medium storing speech signal evaluation program, and speech signal evaluation method","description":"A speech signal evaluation apparatus includes: an acquisition unit that acquires, as a first frame, a speech signal of a specified length from speech signals; a first detection unit that detects, on t","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8532986","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-8532986","citation_suggestion":"Patentable. \"Speech signal evaluation apparatus, storage medium storing speech signal evaluation program, and speech signal evaluation method\" (US-8532986). https://patentable.app/patents/US-8532986","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8532986","json":"https://patentable.app/api/llm-context/US-8532986","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T00:14:50.433Z"}