{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8542980","patent":{"patent_number":"US-8542980","title":"Anti-copy protection for a video signal","assignee":null,"inventors":[],"filing_date":"2009-05-08T00:00:00.000Z","publication_date":"2013-09-24T00:00:00.000Z","cpc_codes":["G11B","H04N","H04N","H04N","H04N"],"num_claims":22,"abstract":"An apparatus and method for applying anti-copy protection to a raster-scanned video signal are described. A square waveform 52 is added to the vertical synchronization pulses 50 of the video signal. The effect of the waveform is not apparent until it has been recorded by a video cassette recorder. The anti-copy protected video signal can therefore be viewed normally on a display device at or near to the picture quality intended by the originator of the video signal, but once recorded, exhibits a reduction in picture quality which makes the video signal quite unattractive to view."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Anti-copy protection for a video signal","description":"An apparatus and method for applying anti-copy protection to a raster-scanned video signal are described. A square waveform 52 is added to the vertical synchronization pulses 50 of the video signal. T","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8542980","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-8542980","citation_suggestion":"Patentable. \"Anti-copy protection for a video signal\" (US-8542980). https://patentable.app/patents/US-8542980","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8542980","json":"https://patentable.app/api/llm-context/US-8542980","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T04:19:24.956Z"}