{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.0.0",
  "generatedAt": "2026-06-23T16:57:17.111Z",
  "sourcePath": "src/main/data/docs",
  "docId": "SMPTE.ST2051.2010",
  "document": {
    "abstract": "This standard defines a Two-Frame Marker for progressive HDTV video formats at 50-Hz, 60/1.001(59.94)-Hz, and 60-Hz frame rates. This Two-Frame Marker is multiplexed into serial streams carrying such a video format to govern the alignment of system actions such as switching to the data block boundaries of embedded ancillary data services having one half the frame rate (Fr/2) compared to the video frame rate (Fr). Requirements for use of this Two-Frame Marker are also defined in this standard. — Note1: Users should be aware that equipment manufactured prior to the publication of this standard typically will not comply with its requirements. — Note2: Use of the Two-Frame Marker is optional with progressive video streams at 50-Hz, 60/1.001(59.94)-Hz, and 60-Hz frame rates mapped to interlaced serial interfaces at 25-Hz, 30/1.001(29.97)-Hz, and 30-Hz frame rates, respectively. — Note3: Use of the Two-Frame Marker is optional with progressive segmented frame video streams at 25-Hz, 30/1.001(29.97)-Hz, and 30-Hz frame rates mapped to interlaced serial interfaces at 25-Hz, 30/1.001(29.97)-Hz, and 30-Hz frame rates, respectively.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "approvalDate": "2010-09-06",
    "approvalDate$meta": {
      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json); Zoho is canonical for SMPTE standards metadata, registry value overwritten",
      "originalValue": "2010",
      "overridden": true,
      "source": "parsed",
      "updated": "2026-06-15T20:27:42.872Z",
      "version": "smpte-zoho-standards@v1"
    },
    "copyright": {
      "holder": "Society of Motion Picture and Television Engineers, Inc.",
      "holder$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.848Z"
      },
      "year": "2010",
      "year$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.848Z"
      }
    },
    "copyright$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "docId": "SMPTE.ST2051.2010",
    "docId$meta": {
      "confidence": "high",
      "note": "Calculated from parsed/inferred metadata",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "docLabel": "SMPTE ST 2051:2010",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from parsed/inferred typenumber/number/date",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "docNumber": "2051",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from HTML pubNumber meta tag",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "docTitle": "Two-Frame Marker for 48(/1.001)-Hz, 50-Hz, and 60(/1.001)-Hz Progressive Digital Video Signals on 1.5 Gb/s and 3 Gb/s Interfaces",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Concatenated suite title and publication title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Publication type parsed from HTML",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "doi": "10.5594/SMPTE.ST2051.2010",
    "doi$meta": {
      "confidence": "medium",
      "note": "Constructed from parsed/inferred type/date",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "familyId": "2051",
    "familyId$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "group": "smpte-24tb-tc",
    "group$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "href": "https://doi.org/10.5594/SMPTE.ST2051.2010",
    "href$meta": {
      "confidence": "high",
      "note": "URL generated and verified via redirect resolution",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "icsCodes": [
      {
        "code": "33.160.01",
        "description": "Audio, video and audiovisual systems in general"
      },
      {
        "code": "33.170",
        "description": "Television and radio broadcasting"
      }
    ],
    "icsCodes$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "isbn": "978-1-61482-643-9",
    "isbn$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "keywords": [
      "Communication",
      "Networking and Broadcast Technologies",
      "Interfaces",
      "Television",
      "Time & Sync"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Scrubbed against src/main/config/site.json controlledKeywords (auto-fix renames + drop noise)",
      "originalValue": [
        "Communication",
        "Networking and Broadcast Technologies",
        "Interfaces",
        "Television",
        "Time & Sync",
        "Interface"
      ],
      "source": "parsed",
      "updated": "2026-06-17T17:24:10.972Z",
      "version": "kw-scrub@v1"
    },
    "numberOfPages": "12",
    "numberOfPages$meta": {
      "confidence": "high",
      "note": "Cross-filled from Zoho standards export (_source/SMPTE/Zoho/SMPTE Standards Document Zoho Export 2026-05-21.json)",
      "source": "parsed",
      "updated": "2026-06-15T20:12:21.844Z",
      "version": "smpte-zoho-standards@v1"
    },
    "pages": "1–12",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "productNumber": "SSD001643",
    "productNumber$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "publicationDate": "2010-09-06",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from HTML pubDateTime meta tag",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "publisher": "SMPTE",
    "publisher$meta": {
      "confidence": "high",
      "note": "Parsed from HTML publisher meta tag",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "publisherLocation": {
      "city": "White Plains, NY",
      "city$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.848Z"
      },
      "country": "USA",
      "country$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.848Z"
      }
    },
    "publisherLocation$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "references": {
      "bibliographic": [
        "SMPTE.ST12-1.2008"
      ],
      "bibliographic$meta": {
        "confidence": "high",
        "note": "Extracted from sibling -ref.xml via extractSmpteSourceRefs.js",
        "source": "parsed",
        "updated": "2026-05-18T22:55:02.775Z"
      },
      "normative": [
        "SMPTE.ST12-2.2008",
        "SMPTE.ST274.2008",
        "SMPTE.ST291.2006",
        "SMPTE.ST296.2001",
        "SMPTE.ST318.1999",
        "SMPTE.RP168.2009",
        "SMPTE.ST337.2000"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Extracted from sibling -ref.xml via extractSmpteSourceRefs.js",
        "source": "parsed",
        "updated": "2026-05-18T23:48:48.871Z"
      }
    },
    "releaseTag": "20100906-pub",
    "releaseTag$meta": {
      "confidence": "high",
      "note": "Release tag parsed from URL folder structure",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/st2051/20100906-pub/",
      "updated": "2025-10-26T17:02:12.852Z"
    },
    "resolvedHref": "https://pub.smpte.org/doc/st2051/20100906-pub/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": "https://my.smpte.org/s/product-details?id=a1BVR0000008kaV",
      "overridden": true,
      "source": "resolved",
      "updated": "2025-11-11T04:51:13.610Z",
      "version": "extractDocs.js@commit:dea962f9e9d7"
    },
    "standardId": "20562",
    "standardId$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_st-2051-2010_1/st2051-2010.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.848Z"
    },
    "status": {
      "active": false,
      "active$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s) and other status values",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-26T17:02:12.852Z"
      },
      "amended": true,
      "amended$meta": {
        "confidence": "high",
        "note": "Parsed from wrapper #amendments",
        "originalValue": null,
        "source": "parsed",
        "updated": "2025-10-26T17:02:12.852Z"
      },
      "amendedBy": [
        "SMPTE.ST2051.2010Am1.2013"
      ],
      "amendedBy$meta": {
        "confidence": "high",
        "note": "Parsed from wrapper #amendment",
        "originalValue": [],
        "source": "parsed",
        "updated": "2025-10-26T17:02:12.852Z"
      },
      "latestVersion": false,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s)",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-26T17:02:12.852Z"
      },
      "stabilized": true,
      "stabilized$meta": {
        "confidence": "high",
        "note": "Parsed from wrapper #state",
        "originalValue": null,
        "source": "parsed",
        "updated": "2025-10-26T17:02:12.852Z"
      },
      "superseded": true,
      "superseded$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s)",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-26T17:02:12.852Z"
      },
      "supersededBy": [
        "SMPTE.ST2051.2014"
      ],
      "supersededBy$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s)",
        "originalValue": [],
        "source": "resolved",
        "updated": "2025-10-26T17:02:12.852Z"
      },
      "supersededDate": "2014-02-20",
      "supersededDate$meta": {
        "confidence": "high",
        "note": "Calculated as the publication date of the next base release (from releaseTag)",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-26T17:02:12.852Z"
      }
    }
  }
}