{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8468016","patent":{"patent_number":"US-8468016","title":"Speech feature extraction apparatus, speech feature extraction method, and speech feature extraction program","assignee":null,"inventors":[],"filing_date":"2012-09-06T00:00:00.000Z","publication_date":"2013-06-18T00:00:00.000Z","cpc_codes":["G10L","G10L","G10L"],"num_claims":5,"abstract":"A speech feature extraction apparatus, speech feature extraction method, and speech feature extraction program. A speech feature extraction apparatus includes: first difference calculation module to: (i) receive, as an input, a spectrum of a speech signal segmented into frames for each frequency bin; and (ii) calculate a delta spectrum for each of the frame, where the delta spectrum is a difference of the spectrum within continuous frames for the frequency bin; and first normalization module to normalize the delta spectrum of the frame for the frequency bin by dividing the delta spectrum by a function of an average spectrum; where the average spectrum is an average of spectra through all frames that are overall speech for the frequency bin; and where an output of the first normalization module is defined as a first delta feature."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Speech feature extraction apparatus, speech feature extraction method, and speech feature extraction program","description":"A speech feature extraction apparatus, speech feature extraction method, and speech feature extraction program. A speech feature extraction apparatus includes: first difference calculation module to: ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8468016","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-8468016","citation_suggestion":"Patentable. \"Speech feature extraction apparatus, speech feature extraction method, and speech feature extraction program\" (US-8468016). https://patentable.app/patents/US-8468016","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8468016","json":"https://patentable.app/api/llm-context/US-8468016","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T09:16:08.354Z"}