{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9743183","patent":{"patent_number":"US-9743183","title":"Complex exponential modulated filter bank for high frequency reconstruction or parametric stereo","assignee":null,"inventors":[],"filing_date":"2017-05-04T00:00:00.000Z","publication_date":"2017-08-22T00:00:00.000Z","cpc_codes":["G10L","G06F","G06F","G10L","G10L","G10L","G10L","G10L","H04R","H04S"],"num_claims":10,"abstract":"An apparatus and method are disclosed for filtering an audio signal are disclosed. The apparatus includes an analysis filter bank, a high frequency reconstructor or a parametric stereo processor, and a synthesis filter bank. The analysis filterbank receives real-valued time domain input audio samples and generates complex valued subband samples. The high frequency reconstructor or parametric stereo processor modifies at least some of the complex valued subband samples. The synthesis filter bank receives the modified complex valued subband samples and generates time domain output audio samples. The analysis filter bank comprises analysis filters that are complex exponential modulated versions of a prototype filter."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Complex exponential modulated filter bank for high frequency reconstruction or parametric stereo","description":"An apparatus and method are disclosed for filtering an audio signal are disclosed. The apparatus includes an analysis filter bank, a high frequency reconstructor or a parametric stereo processor, and ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9743183","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-9743183","citation_suggestion":"Patentable. \"Complex exponential modulated filter bank for high frequency reconstruction or parametric stereo\" (US-9743183). https://patentable.app/patents/US-9743183","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9743183","json":"https://patentable.app/api/llm-context/US-9743183","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T20:44:17.650Z"}