{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8463599","patent":{"patent_number":"US-8463599","title":"Bandwidth extension method and apparatus for a modified discrete cosine transform audio coder","assignee":null,"inventors":[],"filing_date":"2009-02-04T00:00:00.000Z","publication_date":"2013-06-11T00:00:00.000Z","cpc_codes":["G10L","G10L","G10L","G10L"],"num_claims":19,"abstract":"A method includes defining a transition band for a signal having a spectrum within a first frequency band, where the transition band is defined as a portion of the first frequency band, and is located near an adjacent frequency band that is adjacent to the first frequency band. The method analyzes the transition band to obtain a transition band spectral envelope and a transition band excitation spectrum; estimates an adjacent frequency band spectral envelope; generates an adjacent frequency band excitation spectrum by periodic repetition of at least a part of the transition band excitation spectrum with a repetition period determined by a pitch frequency of the signal; and combines the adjacent frequency band spectral envelope and the adjacent frequency band excitation spectrum to obtain an adjacent frequency band signal spectrum. A signal processing logic for performing the method is also disclosed."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Bandwidth extension method and apparatus for a modified discrete cosine transform audio coder","description":"A method includes defining a transition band for a signal having a spectrum within a first frequency band, where the transition band is defined as a portion of the first frequency band, and is located","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8463599","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-8463599","citation_suggestion":"Patentable. \"Bandwidth extension method and apparatus for a modified discrete cosine transform audio coder\" (US-8463599). https://patentable.app/patents/US-8463599","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8463599","json":"https://patentable.app/api/llm-context/US-8463599","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T21:52:57.783Z"}