{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9661436","patent":{"patent_number":"US-9661436","title":"Audio signal playback device, method, and recording medium","assignee":null,"inventors":[],"filing_date":"2013-08-23T00:00:00.000Z","publication_date":"2017-05-23T00:00:00.000Z","cpc_codes":["H04S","H04S","H04S","H04S","H04R","H04S","H04S","H04S","H04S","H04S","H04S"],"num_claims":12,"abstract":"An audio signal playback device includes a conversion unit that performs discrete Fourier transform on each of 2 channel audio signals obtained from a multi-channel input audio signal, a correlation signal extraction unit that, disregarding a direct current component, extracts a correlation signal from the 2 channel audio signals that result from the discrete Fourier transform, and additionally pulls a correlation signal in a lower frequency than a predetermined frequency flow out of the correlation signal, and an output unit that allocates the pulled-out correlation signal to a virtual sound source in such a manner that a time difference in a sound output between adjacent speakers falls within a range of 2Δx/c (where, Δx is a distance between the adjacent speakers, and c is the speed of sound), and outputs a result of the allocation from one portion or all portions of the speaker group."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Audio signal playback device, method, and recording medium","description":"An audio signal playback device includes a conversion unit that performs discrete Fourier transform on each of 2 channel audio signals obtained from a multi-channel input audio signal, a correlation s","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9661436","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-9661436","citation_suggestion":"Patentable. \"Audio signal playback device, method, and recording medium\" (US-9661436). https://patentable.app/patents/US-9661436","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9661436","json":"https://patentable.app/api/llm-context/US-9661436","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:50:45.885Z"}