{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9762360","patent":{"patent_number":"US-9762360","title":"Digital television broadcasting system using coded orthogonal frequency-division modulation with multilevel low-density-parity-check coding","assignee":null,"inventors":[],"filing_date":"2015-09-28T00:00:00.000Z","publication_date":"2017-09-12T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04N","H04N","H04L","H04L"],"num_claims":21,"abstract":"In transmitter apparatus for a digital television broadcasting system, internet-protocol (IP) packets of digital television information are subjected to multilevel coding (MLC) before being Gray-mapped to quadrature-amplitude-modulation (QAM) constellations. The constituent codes of the MLC comprise respective low-density parity-check (LDPC) inner coding. Preferably, the LDPC inner coding is LDPC convolutional coding. The QAM constellations are used in coded orthogonal frequency-division modulation (COFDM) of plural carrier waves up-converted to a radio-frequency broadcast television channel. In receiver apparatus for the digital television broadcasting system the results of de-mapping QAM constellations recovered from demodulating the COFDM carrier waves are de-interleaved, and the LDPC constituent codes of the MLC are independently decoded in parallel with decoding results time-interleaved to recover the IP packets of digital television information."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Digital television broadcasting system using coded orthogonal frequency-division modulation with multilevel low-density-parity-check coding","description":"In transmitter apparatus for a digital television broadcasting system, internet-protocol (IP) packets of digital television information are subjected to multilevel coding (MLC) before being Gray-mappe","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9762360","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-9762360","citation_suggestion":"Patentable. \"Digital television broadcasting system using coded orthogonal frequency-division modulation with multilevel low-density-parity-check coding\" (US-9762360). https://patentable.app/patents/US-9762360","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9762360","json":"https://patentable.app/api/llm-context/US-9762360","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:49:19.753Z"}