{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9728194","patent":{"patent_number":"US-9728194","title":"Audio processing","assignee":null,"inventors":[],"filing_date":"2013-02-22T00:00:00.000Z","publication_date":"2017-08-08T00:00:00.000Z","cpc_codes":["G10L","H04S"],"num_claims":18,"abstract":"An audio processing system (100) for spatial synthesis comprises an upmix stage (110) receiving a decoded m-channel downmix signal (X) and outputting, based thereon, an n-channel upmix signal (Y), wherein 2≦m<n. The upmix stage comprises a downmix modifying processor (120), which receives the m-channel downmix signal and outputting a modified downmix signal (d1, d2) obtained by cross mixing and non-linear processing of the downmix signal, and further comprises a first mixing matrix (130) receiving the downmix signal and the modified downmix signal, forming an n-channel linear combination of the downmix signal channels and modified downmix signal channels only and outputting this as the n-channel upmix signal. In an embodiment, the first mixing matrix accepts one or more mixing parameters (g, α1, . . . ) controlling at least one gain in the linear combination performed by the first mixing matrix. The gains are polynomials of degree ≦2."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Audio processing","description":"An audio processing system (100) for spatial synthesis comprises an upmix stage (110) receiving a decoded m-channel downmix signal (X) and outputting, based thereon, an n-channel upmix signal (Y), whe","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9728194","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-9728194","citation_suggestion":"Patentable. \"Audio processing\" (US-9728194). https://patentable.app/patents/US-9728194","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9728194","json":"https://patentable.app/api/llm-context/US-9728194","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:20:29.231Z"}