{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9780877","patent":{"patent_number":"US-9780877","title":"Multi-stage amplitude modulation-based methods, apparatuses and systems for coding and decoding visible light signal","assignee":null,"inventors":[],"filing_date":"2016-01-30T00:00:00.000Z","publication_date":"2017-10-03T00:00:00.000Z","cpc_codes":["H04B"],"num_claims":13,"abstract":"The present application relates to multi-stage amplitude modulation-based methods, apparatuses, and systems for coding and decoding a visible light signal. The coding method includes the following steps: dividing to-be-transmitted information into multiple information units, where each information unit includes multiple bits; converting the multiple information units into multiple electrical signal units indicated by at least three levels, where an interval indicated by a first level in the at least three levels exists between adjacent electrical signal units, and each electrical signal unit uses a combination of other levels in the at least three levels to represent the multiple bits of a corresponding information unit; combining the electrical signal units to obtain a coded electrical signal; and transmitting the coded electrical signal in a visible light signal form."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Multi-stage amplitude modulation-based methods, apparatuses and systems for coding and decoding visible light signal","description":"The present application relates to multi-stage amplitude modulation-based methods, apparatuses, and systems for coding and decoding a visible light signal. The coding method includes the following ste","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9780877","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-9780877","citation_suggestion":"Patentable. \"Multi-stage amplitude modulation-based methods, apparatuses and systems for coding and decoding visible light signal\" (US-9780877). https://patentable.app/patents/US-9780877","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9780877","json":"https://patentable.app/api/llm-context/US-9780877","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T17:45:58.787Z"}