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  "document": {
    "abbrevTitle": "SMPTE Mot. Imag. J",
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      "source": "parsed",
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      "version": "smpte-idams-publication@v1"
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    "abstract": "We propose a phase detection autofocus (PDAF) method for three-chip 8K (UHD-2) 240-frame/sec cameras that detects the in-focus position of a lens by using disparity information between pixels with different apertures across multiple sensors. This multiplane PDAF method executes pupil division in the same incident position while using simple metal-shielded pixel technology, which can achieve accurate AF and enable low-cost implementation. The proposed method implemented in a UHD-2 three-chip camera incorporating UHD-2 sensors with half-shielded phase-detection pixels into the blue and red channels demonstrated more robust disparity calculation than the conventional single-chip metal-shielded-based PDAF method.",
    "abstract$meta": {
      "confidence": "high",
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      "source": "parsed",
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    "authors": [
      {
        "bio": "Kodai Kikuchi received BE and ME degrees in electrical and electronic engineering from Chiba University, Chiba, Japan, in 2009 and 2011, respectively. He joined Japan Broadcasting Corp. (NHK), Tokyo, Japan, in 2011. Since 2013, he has been researching and developing ultrahigh-definition TV camera and recorder systems at NHK Science and Technology Research Laboratories (STRL), Tokyo. He is a member of the Institute of Image Information and Television Engineers of Japan (ITE).",
        "name": "Kodai Kikuchi",
        "orcid": "0000-0003-2622-2288"
      },
      {
        "bio": "Ryohei Funatsu received BE and ME degrees in electrical and electronic engineering from the Tokyo Institute of Technology, Tokyo, Japan, in 2000 and 2002, respectively. He joined NHK in 2002. From 2004 to 2021, he was engaged in research of ultrahigh-definition TV camera systems at NHK STRL, Tokyo. Since 2021, he has been engaged in the system design of broadcasting equipment in the Engineering Administration Department, Tokyo. He is a member of ITE.",
        "name": "Ryohei Funatsu",
        "orcid": "0000-0002-9334-8545"
      },
      {
        "bio": "Tomohiro Nakamura is a research engineer in the Advanced Television Systems Research Division, NHK STRL. He is working on the research of ultrahigh-?definition television (UHDTV) systems. His research fields include the development of camera systems, image sensors, and digital signal processing. He joined NHK in 2008 after receiving a BE degree in electrical engineering and an ME degree in computer science and engineering from Waseda University, Tokyo, in 2006 and 2008, respectively. He has been engaged in research on UHDTV camera systems since 2012. He is a member of ITE.",
        "name": "Tomohiro Nakamura",
        "orcid": "0000-0002-7220-7081"
      },
      {
        "bio": "Kohei Tomioka received BE and ME degrees in engineering science from Kyoto University, Kyoto, Japan, in 2011 and 2013, respectively. In 2013, he joined NHK. He worked as a broadcasting engineer from 2013 to 2016. Since 2016, he has been with NHK STRL, where he has been engaged in the research and development of image sensors and cameras for the 8K super hi-vision. He is a member of ITE.",
        "name": "Kohei Tomioka",
        "orcid": "0000-0002-2504-1154"
      },
      {
        "bio": "Takayuki Yamashita is the head of the Advanced Television Systems Research Division at NHK STRL, where he is responsible for exploring audio-visual technologies to enhance the immersiveness of viewers. He was working on the research, development, and standardization of television systems including UHD/HDR. He developed the world’s first 8K camera system in 2002 and the signal interface for the UHD-2 system in 2013. He joined NHK, Tokyo, in 1995 and has been engaged in research on camera systems for broadcasting since 1999. He received BE and ME degrees from the Kyoto Institute of Technology, Kyoto, Japan, in 1993 and 1995, respectively, and a DrEng degree from Ehime University, Matsuyama, Japan, in 2016. He is a member of SMPTE and ITE.",
        "name": "Takayuki Yamashita",
        "orcid": "0000-0002-3645-7948"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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      "version": "smpte-idams-publication@v1"
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    "contentType": "orig-research",
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      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
      "version": "smpte-idams-publication@v1"
    },
    "copyright": {
      "holder": "SMPTE",
      "holder$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
        "source": "parsed",
        "updated": "2026-10-07T17:09:33.718Z",
        "version": "smpte-idams-publication@v1"
      },
      "year": "2023",
      "year$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
        "source": "parsed",
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        "version": "smpte-idams-publication@v1"
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    "copyright$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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      "version": "smpte-idams-publication@v1"
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    "docId": "10.5594-JMI.2023.3236021",
    "docId$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
      "version": "smpte-idams-publication@v1"
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    "docLabel": "SMPTE Motion Imaging Journal ( Volume: 132, Issue: 2, March 2023)",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
      "version": "smpte-idams-publication@v1"
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    "docTitle": "A UHDTV Camera System With Multiplane Phase-Detection Autofocus",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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    "docType": "Journal Article",
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    "doi": "10.5594/JMI.2023.3236021",
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    "href": "https://doi.org/10.5594/JMI.2023.3236021",
    "href$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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    "issn": {
      "electronic": "2160-2492",
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        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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      "print": "1545-0279",
      "print$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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    "issn$meta": {
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      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
      "source": "parsed",
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      "version": "smpte-idams-publication@v1"
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    "journalTitle": "SMPTE Motion Imaging Journal",
    "journalTitle$meta": {
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      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
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    "keywords": [
      "High-speed Camera",
      "Metal-shielded Sensor",
      "Phase Detection Autofocus (PDAF)",
      "Three-chip Color Imaging",
      "UHD-2"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2023/7261654/10058710/10058728.xml) via idamsIngest.js",
      "source": "parsed",
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    "number": "2",
    "number$meta": {
      "confidence": "high",
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      "source": "parsed",
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    "pages": "32–39",
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    "publicationDate": "2023-03-01",
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    "publisher": "SMPTE",
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      "city": "White Plains, NY",
      "city$meta": {
        "confidence": "high",
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      "country": "USA",
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    "references": {
      "bibliographic": [
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        "R-REC-BT.2100-2",
        "10.5594-JMI.2019.2895583",
        "orphan/10.5594-JMI.2023.3236021/h:0e862f0c",
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        "note": "References parsed from the published PDF (Journal Article Repository/2023/7261654/10058710/10058728.pdf). SMPTE's library delivery has no reference file or full text for this paper (src/main/reports/smpte-upstream/referenceFilesTruthTable.md). Cross-check: Crossref lists 14 reference(s) for this DOI; 14 parsed from the PDF.",
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