{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9747916","patent":{"patent_number":"US-9747916","title":"CELP-type speech coding apparatus and method using adaptive and fixed codebooks","assignee":null,"inventors":[],"filing_date":"2016-01-20T00:00:00.000Z","publication_date":"2017-08-29T00:00:00.000Z","cpc_codes":["G10L","G10L","G10L","G10L","G10L","G10L","G10L","G10L"],"num_claims":5,"abstract":"In a CELP-type speech coding apparatus, switching between an orthogonal search of a fixed codebook and a non-orthogonal search is performed in a practical and effective manner. The CELP-type speech coding apparatus includes a parameter quantizer that selects an adaptive codebook vector and a fixed codebook vector so as to minimize an error between a synthesized speech signal and an input speech signal. The parameter quantizer includes a fixed codebook searcher that switches between the orthogonal fixed codebook search and the non-orthogonal fixed codebook search based on a correlation value between a target vector for the fixed codebook search and the adaptive codebook vector obtained as a result of a synthesis filtering process."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"CELP-type speech coding apparatus and method using adaptive and fixed codebooks","description":"In a CELP-type speech coding apparatus, switching between an orthogonal search of a fixed codebook and a non-orthogonal search is performed in a practical and effective manner. The CELP-type speech co","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9747916","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-9747916","citation_suggestion":"Patentable. \"CELP-type speech coding apparatus and method using adaptive and fixed codebooks\" (US-9747916). https://patentable.app/patents/US-9747916","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9747916","json":"https://patentable.app/api/llm-context/US-9747916","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T13:38:23.634Z"}