{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9691426","patent":{"patent_number":"US-9691426","title":"Optical device and optical disc recording or reproducing method for optical disc including BCA having zone format identifier","assignee":null,"inventors":[],"filing_date":"2016-01-08T00:00:00.000Z","publication_date":"2017-06-27T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B"],"num_claims":4,"abstract":"According to an optical disc, a track, where data is recorded in predetermined block units, is formed by wobbling at a spatial period in accordance with a radial position, and the track is divided into zones in a radial direction. Data is recorded in each of the zones at a predetermined line density based on a ratio n/m of the number of bits of a bit pattern of recording data to one wavelength of wobbling. The optical disc includes a first area having one of the zones, a second area having one of the zones different from the one of the zones in the first area, and a line density of data different from a line density of data in the first area, and a BCA where a zone format identifier specifying a zone table defining a boundary position of each of the zones and the ratio n/m is recorded."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical device and optical disc recording or reproducing method for optical disc including BCA having zone format identifier","description":"According to an optical disc, a track, where data is recorded in predetermined block units, is formed by wobbling at a spatial period in accordance with a radial position, and the track is divided int","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9691426","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-9691426","citation_suggestion":"Patentable. \"Optical device and optical disc recording or reproducing method for optical disc including BCA having zone format identifier\" (US-9691426). https://patentable.app/patents/US-9691426","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9691426","json":"https://patentable.app/api/llm-context/US-9691426","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:06:10.063Z"}