{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8520859","patent":{"patent_number":"US-8520859","title":"System for comfort noise injection","assignee":null,"inventors":[],"filing_date":"2012-03-06T00:00:00.000Z","publication_date":"2013-08-27T00:00:00.000Z","cpc_codes":["H04R"],"num_claims":20,"abstract":"A noise injection system adds comfort noise to an audio signal. The system includes a background noise estimator that determines a spectral content of a background noise associated with the audio signal. A comfort noise generator generates a comfort noise signal having a random phase. A gain circuit adjusts the comfort noise signal based on the spectral content of the background noise. A combining circuit combines a gain-adjusted comfort noise signal and the audio signal to generate an output signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"System for comfort noise injection","description":"A noise injection system adds comfort noise to an audio signal. The system includes a background noise estimator that determines a spectral content of a background noise associated with the audio sign","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8520859","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-8520859","citation_suggestion":"Patentable. \"System for comfort noise injection\" (US-8520859). https://patentable.app/patents/US-8520859","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8520859","json":"https://patentable.app/api/llm-context/US-8520859","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T09:42:42.751Z"}