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  "document": {
    "abbrevTitle": "SMPTE Mot. Imag. J",
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      "source": "parsed",
      "updated": "2026-05-22T21:44:19.125Z",
      "version": "smpte-journal-article-nlm@v1"
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    "abstract": "This paper traces the beginnings of the X-Curve in work carried out in the early 1970s and follows the various developments since that time. This electro-acoustic characteristic is now employed in most theaters throughout the world. The “X” stood for “experimental,” an epithet that now seems inappropriate for something that's been a national and international standard for 30 years!",
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    "authors": [
      {
        "bio": "Ioan Allen joined Dolby Laboratories in 1969, and has been directly involved in the origination and development of major audio advancements in the Dolby Stereo film program. He is a Fellow of SMPTE, AES, and BKSTS, and is active in U.S. and world standards organizations. He is past president of the ITEA and past Engineering Director—Motion Pictures for SMPTE. Allen is a member of San Francisco Mayor Gavin Newsom's Digital Media Advisory Council, serves as technical chairman of the Trailer Audio Standards Association (TASA), and is also an adjunct professor at the University of Southern California School of Cinema-Television. Allen holds several patents and has authored and contributed to many journals and technical papers. He has been honored for his contributions to the film industry and has been the recipient of awards from Intersociety for the Enhancement of Theatrical Presentation (2002), the National Association of Theatre Owners (1998), the BKSTS, and the Samuel L. Warner Award from SMPTE (1985). Allen was the recipient of Scientific and Engineering Awards from the Academy of Motion Picture Arts and Sciences in 1979, 1987, and 2001, and received an Oscar in 1989.",
        "name": "Ioan Allen"
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      "confidence": "high",
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      "confidence": "high",
      "note": "Cross-filled from SMPTE canonical repository import (smpte-canonical-audit/canonicalLibrary.*.json); previous value was a placeholder",
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      "source": "parsed",
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      "holder": "Society of Motion Picture and Television Engineers, Inc.",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
        "source": "parsed",
        "updated": "2026-05-22T21:44:19.125Z",
        "version": "smpte-journal-article-nlm@v1"
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      "year": "2006",
      "year$meta": {
        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
        "source": "parsed",
        "updated": "2026-05-22T21:44:19.125Z",
        "version": "smpte-journal-article-nlm@v1"
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
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      "updated": "2026-05-22T21:44:19.125Z",
      "version": "smpte-journal-article-nlm@v1"
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    "docId": "10.5594-J16175",
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      "confidence": "high",
      "note": "Derived from DOI 10.5594/J16175",
      "source": "parsed",
      "updated": "2026-05-22T21:44:19.125Z",
      "version": "smpte-journal-article-nlm@v1"
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    "docLabel": "SMPTE Motion Imaging Journal ( Volume: 115, Issue: 7-8, 2006)",
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      "note": "Composed from venue title, volume/issue and date",
      "source": "inferred",
      "updated": "2026-05-22T21:44:19.125Z",
      "version": "smpte-journal-article-nlm@v1"
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    "docTitle": "The X-Curve: Its Origins and History: Electro-Acoustic Characteristics in the Cinema and the Mix-Room, the Large Room and the Small",
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      "confidence": "high",
      "note": "Title updated from SMPTE canonical repository (2026-07-09 drift review: canonical richer/cleaner; TeX/sup/inf converted to Unicode) (smpte-canonical-audit/canonicalLibrary.*.json)",
      "originalValue": "The X-Curve: Its Origins and History",
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    "doi": "10.5594/J16175",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
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      "note": "Constructed from DOI 10.5594/J16175",
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      "version": "smpte-journal-article-nlm@v1"
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    "issn": {
      "electronic": "2160-2492",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
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        "updated": "2026-05-22T21:44:19.125Z",
        "version": "smpte-journal-article-nlm@v1"
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
        "source": "parsed",
        "updated": "2026-05-22T21:44:19.125Z",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
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      "updated": "2026-05-22T21:44:19.125Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08202015 BACKFILE JOURNAL FRESH/smptej_115_7-8/MIJR15Vol115No7-8.xml)",
      "source": "parsed",
      "updated": "2026-06-17T00:17:09.425Z",
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    "journalTitle": "SMPTE Motion Imaging Journal",
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      "confidence": "high",
      "note": "Era-accurate journal title from SMPTE canonical repository (periodical parent at time of publication) (smpte-canonical-audit/canonicalLibrary.*.json)",
      "originalValue": null,
      "source": "parsed",
      "updated": "2026-07-08T00:35:38.133Z",
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    "number": "7-8",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
      "source": "parsed",
      "updated": "2026-05-22T21:44:19.125Z",
      "version": "smpte-journal-article-nlm@v1"
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    "pages": "264–275",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
      "source": "parsed",
      "updated": "2026-05-22T21:44:19.125Z",
      "version": "smpte-journal-article-nlm@v1"
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    "publicationDate": "2006-07-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Month corrected from SMPTE canonical repository (registry had Jan-1 placeholder) (smpte-canonical-audit/canonicalLibrary.*.json)",
      "originalValue": "2006-01-01",
      "source": "parsed",
      "updated": "2026-07-08T00:35:38.133Z",
      "version": "smpte-canonical-repo@v1"
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      "confidence": "high",
      "note": "Normalised to registry \"SMPTE\" convention from NLM publisher-name (The Society of Motion Picture and Television Engineers)",
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      "updated": "2026-05-22T21:44:19.125Z",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
        "source": "parsed",
        "updated": "2026-05-22T21:44:19.125Z",
        "version": "smpte-journal-article-nlm@v1"
      },
      "country": "USA",
      "country$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08202015 BACKFILE JOURNAL FRESH/smptej_115_7-8/MIJR15Vol115No7-8.xml)",
        "source": "parsed",
        "updated": "2026-06-17T00:17:09.425Z",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J16175.xml)",
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      "updated": "2026-05-22T21:44:19.125Z",
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        "confidence": "medium",
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        "updated": "2026-05-22T21:44:19.125Z",
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      "confidence": "high",
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      "updated": "2026-05-22T21:44:19.125Z",
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