{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11521629","patent":{"patent_number":"US-11521629","title":"Method for obtaining digital audio tampering evidence based on phase deviation detection","assignee":null,"inventors":[],"filing_date":"2022-02-09T00:00:00.000Z","publication_date":"2022-12-06T00:00:00.000Z","cpc_codes":["G10L","G10L","G06F","G06F","G06F","G10L","G10L"],"num_claims":7,"abstract":"Disclosed is a digital audio tampering forensics method based on phase offset detection, comprising: multiplying a signal to be identified with a time label to obtain a modulation signal of the signal to be identified; then, performing a short-time Fourier transform on the signal to be identified and the modulation signal to obtain a signal power spectrum and a modulation signal power spectrum; computing group delay characteristics by using the signal power spectrum and the modulation signal power spectrum; computing a mean value of the group delay characteristics, and then using the mean value results for smoothing computation to obtain phase information of a current frame signal; computing a dynamic threshold by using the phase information of the current frame signal, and then deciding whether the signal is tampered by using the dynamic threshold and the phase information of the current frame signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for obtaining digital audio tampering evidence based on phase deviation detection","description":"Disclosed is a digital audio tampering forensics method based on phase offset detection, comprising: multiplying a signal to be identified with a time label to obtain a modulation signal of the signal","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11521629","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-11521629","citation_suggestion":"Patentable. \"Method for obtaining digital audio tampering evidence based on phase deviation detection\" (US-11521629). https://patentable.app/patents/US-11521629","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11521629","json":"https://patentable.app/api/llm-context/US-11521629","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T16:23:58.194Z"}