{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9639605","patent":{"patent_number":"US-9639605","title":"Methods and apparatus to generate signatures representative of media","assignee":null,"inventors":[],"filing_date":"2016-03-30T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["G06F","G06F","G11B"],"num_claims":20,"abstract":"Example signature comparison methods disclosed herein include accessing a first set of values from a query signature based on a first index value, the first set of values determined based on a corresponding set of first angles between a first reference line and respective first lines tangent to first functions defined from first frequency band values determined for monitored audio. Disclosed example methods also include accessing a second set of values from a reference signature based on the first index value. Disclosed example methods further include computing a first correlation coefficient based on the first and second sets of values, and comparing a set of correlation coefficients including the first correlation coefficient to a threshold to determine whether the query and reference signatures match."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Methods and apparatus to generate signatures representative of media","description":"Example signature comparison methods disclosed herein include accessing a first set of values from a query signature based on a first index value, the first set of values determined based on a corresp","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9639605","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-9639605","citation_suggestion":"Patentable. \"Methods and apparatus to generate signatures representative of media\" (US-9639605). https://patentable.app/patents/US-9639605","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9639605","json":"https://patentable.app/api/llm-context/US-9639605","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:41:54.605Z"}