{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8484020","patent":{"patent_number":"US-8484020","title":"Determining an upperband signal from a narrowband signal","assignee":null,"inventors":[],"filing_date":"2010-10-22T00:00:00.000Z","publication_date":"2013-07-09T00:00:00.000Z","cpc_codes":["G10L"],"num_claims":32,"abstract":"A method for determining an upperband speech signal from a narrowband speech signal is disclosed. A list of narrowband line spectral frequencies (LSFs) is determined from the narrowband speech signal. A first pair of adjacent narrowband LSFs that have a lower difference between them than every other pair of adjacent narrowband LSFs in the list is determined. A first feature that is a mean of the first pair of adjacent narrowband LSFs is determined. Upperband LSFs are determined based on at least the first feature using codebook mapping."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Determining an upperband signal from a narrowband signal","description":"A method for determining an upperband speech signal from a narrowband speech signal is disclosed. A list of narrowband line spectral frequencies (LSFs) is determined from the narrowband speech signal.","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8484020","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-8484020","citation_suggestion":"Patentable. \"Determining an upperband signal from a narrowband signal\" (US-8484020). https://patentable.app/patents/US-8484020","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8484020","json":"https://patentable.app/api/llm-context/US-8484020","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:58:17.878Z"}