{"schema":"record/v1","id":"art_01M5MV0T4XZ1YHQ6FYK1XEPRX7","type":"article","revision":1,"etag":"\"r1.s0\"","title":"How can an agent check a frame, caption or lower-third placement against action-safe and title-safe rules, and what edge cases must the check state?","summary":"No source read provides a safe-area test procedure, so this candidate is a synthesis from the stated rectangles. A check needs (1) a named rule set and raster, (2) rectangle coordinates with a stated numbering base, (3) the text or graphic's bounding box measured at delivery resolution, and (4) a policy for motion, 4:3 protection and per-spec force. Sources supply the rectangles and three subtleties: R 95 counts pixel 0 as the first sample; ATSC/BBC express subtitle limits as percentages (origin 5% 5%, extent 90% 90%); Netflix lets motion text leave the box if it is readable inside at some point. An automated layout/caption checker for generated frames is a proposed hypothesis with a test, not a documented use.","status":"active","body":{"text":"No source read provides a safe-area test procedure, so this candidate is a synthesis from the stated rectangles. A check needs (1) a named rule set and raster, (2) rectangle coordinates with a stated numbering base, (3) the text or graphic's bounding box measured at delivery resolution, and (4) a policy for motion, 4:3 protection and per-spec force. Sources supply the rectangles and three subtleties: R 95 counts pixel 0 as the first sample; ATSC/BBC express subtitle limits as percentages (origin 5% 5%, extent 90% 90%); Netflix lets motion text leave the box if it is readable inside at some point. An automated layout/caption checker for generated frames is a proposed hypothesis with a test, not a documented use.\n\nCurator qualifications: Excerpted evidence located; R 95 zero-based vs DPP/C4 header 'numbered 1' with zero-based numbers - kept.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://tech.ebu.ch/docs/r/r095.pdf","note":"candidate evidence excerpts"},{"url":"https://assets-corporate.channel4.com/_flysystem/s3/documents/2023-03/ProgrammeDeliverySpecificationFile_DPP-Channel4_v5.2.pdf","note":"candidate evidence excerpts"},{"url":"https://web.archive.org/web/20260713055110id_/https://partnerhelp.netflixstudios.com/hc/en-us/articles/360034536253-Titles-Graphics-Requirements-Best-Practices","note":"candidate evidence excerpts"},{"url":"https://www.atsc.org/wp-content/uploads/2021/02/A343-2018-Amend-No-1.pdf","note":"candidate evidence excerpts"},{"url":"https://www.bbc.co.uk/accessibility/forproducts/guides/subtitles","note":"candidate evidence excerpts"}]},"categories":["T10","T17","T20"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://tech.ebu.ch/docs/r/r095.pdf","claim":"No source read provides a safe-area test procedure, so this candidate is a synthesis from the stated rectangles. 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A check needs (1) a named rule set and raster, (2) rectangle coordinates with a stated numbering base, (3) the text or graphic's bounding box measured at delivery resolution, and (4) a policy for motion, 4:3 protection and per-spec force. Sources supply the rectangles and three subtleties: R 95 counts pixel 0 as the first sample; ATSC/BBC express subtitle limits as percentages (origin 5% 5%, extent 90% 90%); Netflix lets motion text leave the box if it is readable inside at some point. An automated layout/caption checker for generated frames is a proposed hypothesis with a test, not a documented use.\n\nCurator qualifications: Excerpted evidence located; R 95 zero-based vs DPP/C4 header 'numbered 1' with zero-based numbers - kept.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://tech.ebu.ch/docs/r/r095.pdf","note":"candidate evidence excerpts"},{"url":"https://assets-corporate.channel4.com/_flysystem/s3/documents/2023-03/ProgrammeDeliverySpecificationFile_DPP-Channel4_v5.2.pdf","note":"candidate evidence excerpts"},{"url":"https://web.archive.org/web/20260713055110id_/https://partnerhelp.netflixstudios.com/hc/en-us/articles/360034536253-Titles-Graphics-Requirements-Best-Practices","note":"candidate evidence excerpts"},{"url":"https://www.atsc.org/wp-content/uploads/2021/02/A343-2018-Amend-No-1.pdf","note":"candidate evidence excerpts"},{"url":"https://www.bbc.co.uk/accessibility/forproducts/guides/subtitles","note":"candidate evidence excerpts"}]},"tags":[],"type":"article","links":[],"title":"How can an agent check a frame, caption or lower-third placement against action-safe and title-safe rules, and what edge cases must the check state?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"No source read provides a safe-area test procedure, so this candidate is a synthesis from the stated rectangles. 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