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  "docId": "SMPTE.RP174.1993",
  "document": {
    "abstract": "This practice describes the means of interconnecting digital video equipment operating in system M (525/60) and complying with the 4:4:4 encoding parameters as defined in CCIR Recommendation 601-2, annex 1 with a nominal sampling frequency of 13.5 MHz. Provision is made to convey signal at 10-bit precision and to carry a fourth auxiliary channel as part of the signal multiplex (yielding 4:4:4:4 or 4×4 overall). The practice has application in the television studio over distances up to 100 m (320 ft). The characteristics of the interface are summarized below: (1.1) The video signal is transmitted in the form of three color-component signals and an auxiliary signal (G, B, R, and A or Y, C<inf>B</inf>, C<inf>R</inf>, and A). (1.2) The video signal is transmitted at the 4:4:4 family level of CCIR 601-2, with a nominal sampling frequency of 13.5 MHz. Provision is made to convey signals at 10-bit precision. (1.3) The bits of the digital code words that describe the video signal are transmitted in a parallel arrangement using 10 conductor pairs. Each pair carries a multiplexed stream of bits (of the same significance) of each of the component signals. Accordingly, the bit rate used in each pair is nominally 54 Mbits/s. An eleventh conductor pair carries a clock signal at 54 MHz. (1.4) The signals on the interface are transmitted using balanced conductor pairs for a distance up to 25 m (80 ft) without equalization and up to 100 m (320 ft) with appropriate equalization. (1.5) The interface consists of one transmitter and one receiver in a point-to-point connection. (1.6) Parameters of the signal format are chosen to facilitate conversion to and from a serial digital interface format. (1.7) The interface allows the transmission of appropriate ancillary signals that may be multiplexed into the data stream during video blanking intervals. (1.8) Where hexadecinal values are used, they are indicated by a subscript h, such as 3FF<inf>h</inf>; other values are decimal.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "approvalDate": "1993",
    "approvalDate$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "copyright": {
      "holder": "Society of Motion Picture and Television Engineers, Inc.",
      "holder$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.838Z"
      },
      "year": "1993",
      "year$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.838Z"
      }
    },
    "copyright$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "docId": "SMPTE.RP174.1993",
    "docId$meta": {
      "confidence": "high",
      "note": "Calculated from parsed/inferred metadata",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "docLabel": "SMPTE RP 174:1993",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from parsed/inferred typenumber/number/date",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "docNumber": "174",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from HTML pubNumber meta tag",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "docTitle": "Bit-Parallel Digital Interface for 4:4:4:4 Component Video Signal (Single Link)",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Concatenated suite title and publication title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "docType": "Recommended Practice",
    "docType$meta": {
      "confidence": "high",
      "note": "Publication type parsed from HTML",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "doi": "10.5594/SMPTE.RP174.1993",
    "doi$meta": {
      "confidence": "medium",
      "note": "Constructed from parsed/inferred type/date",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "familyId": "174",
    "familyId$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "group": "smpte-32nf-tc",
    "group$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "href": "https://doi.org/10.5594/SMPTE.RP174.1993",
    "href$meta": {
      "confidence": "high",
      "note": "URL generated and verified via redirect resolution",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "icsCodes": [
      {
        "code": "33.160.01",
        "description": "Audio, video and audiovisual systems in general"
      },
      {
        "code": "33.170",
        "description": "Television and radio broadcasting"
      }
    ],
    "icsCodes$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "isbn": "978-1-61482-188-5",
    "isbn$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "keywords": [
      "Communication",
      "Networking and Broadcast Technologies",
      "Interfaces",
      "Television",
      "Interface"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "pages": "1–17",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "productNumber": "SSD001189",
    "productNumber$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "publicationDate": "1993-09-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from HTML pubDateTime meta tag",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "publisher": "SMPTE",
    "publisher$meta": {
      "confidence": "high",
      "note": "Parsed from HTML publisher meta tag",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "publisherLocation": {
      "city": "White Plains, NY",
      "city$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.838Z"
      },
      "country": "USA",
      "country$meta": {
        "confidence": "high",
        "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
        "source": "parsed",
        "updated": "2026-05-12T21:55:08.838Z"
      }
    },
    "publisherLocation$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "references": {
      "normative": [
        "SMPTE.RP157.1990"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Extracted from sibling -ref.xml via extractSmpteSourceRefs.js",
        "source": "parsed",
        "updated": "2026-05-18T22:11:52.542Z"
      }
    },
    "releaseTag": "19930901-pub",
    "releaseTag$meta": {
      "confidence": "high",
      "note": "Release tag parsed from URL folder structure",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://pub.smpte.org/doc/rp174/19930901-pub/",
      "updated": "2025-10-12T05:19:54.074Z"
    },
    "resolvedHref": "https://pub.smpte.org/doc/rp174/19930901-pub/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": "https://my.smpte.org/s/product-details?id=a1BVR0000008kYO",
      "overridden": true,
      "source": "resolved",
      "updated": "2025-10-30T22:50:35.485Z",
      "version": "extractDocs.js@commit:ee2844fb1cf2"
    },
    "standardId": "20321",
    "standardId$meta": {
      "confidence": "high",
      "note": "Parsed from sibling XML (_source/SMPTE/APTARA/DL Project Files/08262015 STANDARDS REVISED DEPOSIT/smptes_rp-174-1993_1/rp0174-1993.xml)",
      "source": "parsed",
      "updated": "2026-05-12T21:55:08.838Z"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s) and other status values",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-12T05:19:54.074Z"
      },
      "amended": false,
      "amended$meta": {
        "confidence": "high",
        "note": "Parsed from wrapper #amendments",
        "originalValue": null,
        "source": "parsed",
        "updated": "2025-10-12T05:19:54.074Z"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s)",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-12T05:19:54.074Z"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Calculated from the releaseTag(s)",
        "originalValue": null,
        "source": "resolved",
        "updated": "2025-10-12T05:19:54.074Z"
      }
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}