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  "docId": "10.5594-JMI.2020.3000934",
  "document": {
    "abbrevTitle": "SMPTE Mot. Imag. J",
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      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
      "version": "smpte-idams-publication@v1"
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    "abstract": "This paper introduces the world’s first ultrahigh-definition (UHD)-2/8K 120-Hz high-efficiency video coding (HEVC)/H.265 realtime video codec that complies with 8K broadcasting standards in Japan. The validation results of the processing performance and image quality are presented, and an 8K 120-Hz live transmission experiment using the codec is described. In realtime high-frame-rate 8K 120-Hz video encoding and decoding, both high-speed processing and high-image-quality encoding are necessary. In this study, the encoder processes an 8K 120-Hz video in parallel with 12 UHD-1/4K 60-Hz encoders (four and three partitions in the spatial and temporal directions, respectively) after analyzing the down-converted 4K input video. In the decoder, video- and audio-decoding functions were implemented using highly parallelized software. Through validation, we confirmed that the proposed codec achieved high image quality at a low bitrate of 85 Mb/s, which is equivalent to the bitrate of 8K 60-Hz broadcasting, and stable transmission at a high bitrate of up to 400 Mb/s. We also determined that the proposed codec is practical for live transmission.",
    "abstract$meta": {
      "confidence": "high",
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      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
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    "authors": [
      {
        "bio": "Yasuko Sugito is currently with the Japan Broadcasting Corporation (NHK) Science and Technology Research Laboratories (STRL), Tokyo, Japan, researching video compression algorithms and image processing on 8K. Her current research interests focus on image quality assessment for high-frame-rate (HFR) 8K 120-Hz videos and high dynamic range (HDR) images.",
        "name": "Yasuko Sugito",
        "orcid": "0000-0002-7549-1073"
      },
      {
        "bio": "Shinya Iwasaki received a master’s degree in computer science and engineering from Waseda University, Tokyo, Japan, in 2014. Currently, he works at NHK STRL, Tokyo. His main research interests are video coding and ultrahigh-definition television (UHDTV) system.",
        "name": "Shinya Iwasaki"
      },
      {
        "bio": "Kazuhiro Chida received BS and MS degrees in information and communication engineering from the University of Electro-Communications, Tokyo, Japan, in 2007 and 2009, respectively. Currently, he works at NHK STRL, Tokyo. His main research interests are video coding and UHDTV system.",
        "name": "Kazuhiro Chida"
      },
      {
        "bio": "Kazuhisa Iguchi received BS and MS degrees in electrical engineering from the Tokyo Institute of Technology, Tokyo, Japan, in 1991 and 1993, respectively. He joined NHK, Tokyo, Japan, in 1993, and has been working at NHK STRL. He is engaged in the research of television standards conversion for HDTV, scene description, and moving picture coding. He is a member of Institute of Electronics, Information and Communication Engineers (IEICE) Japan and Institute of Image Information and Television Engineers (ITE) Japan.",
        "name": "Kazuhisa Iguchi"
      },
      {
        "bio": "Kikufumi Kanda received BS and MS degrees in electrical engineering from Sophia University, Tokyo, Japan, in 1990 and 1992, respectively. Currently, he works at NHK STRL, Tokyo. His main research interests are UHDTV system and video coding.",
        "name": "Kikufumi Kanda"
      },
      {
        "bio": "Xuying Lei received a master’s degree in information and communication engineering from Kanazawa University, Kanazawa, Japan, in 2011. Currently, she works with Fujitsu Laboratories Ltd., Kanagawa, Japan. She used to work on 8K UHDTV video encoding and compression. Recently, she focuses on developing a different video encoding and compression approach, especially for machine vision, which is expected to achieve lower bitrate while high accuracy is preserved under various AI image recognition scenarios.",
        "name": "Xuying Lei"
      },
      {
        "bio": "Hidenobu Miyoshi received a master’s degree in information science and electrical engineering from Kyushu University, Fukuoka, Japan, in 2001. He is currently with Fujitsu Laboratories Ltd., Kanagawa, Japan, researching video transmission using 5G wireless communication. His main research interests are edge cloud system and applications of video coding and image processing.",
        "name": "Hidenobu Miyoshi"
      },
      {
        "bio": "Yoshifumi Uehara is a senior director with the Fujitsu Business Planning Division. Before joining Fujitsu Laboratories Ltd., Kanagawa, Japan, as a principal researcher in 2017, he was the Semiconductor new business development director at Fujitsu Limited, Kanagawa, Japan, since 2010, and the General Manager of Advanced Engineering, the IoT Engineering Business Unit, Fujitsu Limited since 2015.",
        "name": "Yoshifumi Uehara"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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    "contentType": "orig-research",
    "contentType$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
      "version": "smpte-idams-publication@v1"
    },
    "copyright": {
      "holder": "SMPTE",
      "holder$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
        "source": "parsed",
        "updated": "2026-10-07T17:09:33.718Z",
        "version": "smpte-idams-publication@v1"
      },
      "year": "2020",
      "year$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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        "version": "smpte-idams-publication@v1"
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    "copyright$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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      "version": "smpte-idams-publication@v1"
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    "docId": "10.5594-JMI.2020.3000934",
    "docId$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
      "version": "smpte-idams-publication@v1"
    },
    "docLabel": "SMPTE Motion Imaging Journal ( Volume: 129, Issue: 7, August 2020)",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
      "source": "parsed",
      "updated": "2026-10-07T17:09:33.718Z",
      "version": "smpte-idams-publication@v1"
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    "docTitle": "UHD-2/8K 120-Hz Realtime Video Codec",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
      "source": "parsed",
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      "version": "smpte-idams-publication@v1"
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    "docType": "Journal Article",
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      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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    "doi": "10.5594/JMI.2020.3000934",
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      "confidence": "high",
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      "source": "parsed",
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    "href": "https://doi.org/10.5594/JMI.2020.3000934",
    "href$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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    "issn": {
      "electronic": "2160-2492",
      "electronic$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
        "source": "parsed",
        "updated": "2026-10-07T17:09:33.718Z",
        "version": "smpte-idams-publication@v1"
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      "print": "1545-0279",
      "print$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
        "source": "parsed",
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    "issn$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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      "version": "smpte-idams-publication@v1"
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    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
      "source": "parsed",
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    "journalTitle": "SMPTE Motion Imaging Journal",
    "journalTitle$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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    "keywords": [
      "HFR",
      "Performance Evaluation",
      "Realtime Encoder and Decoder",
      "UHD-2"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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    "number": "7",
    "number$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
      "source": "parsed",
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    "pages": "41–49",
    "pages$meta": {
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    "publicationDate": "2020-08-01",
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      "source": "parsed",
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      "version": "smpte-idams-publication@v1"
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    "publisher": "SMPTE",
    "publisher$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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    "publisherLocation": {
      "city": "White Plains, NY",
      "city$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2020/7261654/9146749/09146795.xml) via idamsIngest.js",
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      "country": "USA",
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        "confidence": "high",
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    "references": {
      "bibliographic": [
        "T-REC-H.265.2017",
        "R-REC-BT.2100-2",
        "orphan/10.5594-JMI.2020.3000934/h:ce1f918a",
        "orphan/10.5594-JMI.2020.3000934/h:d339d956",
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        "orphan/10.5594-JMI.2020.3000934/h:1266635d",
        "T-REC-P.910",
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        "note": "References parsed from the published PDF (Journal Article Repository/2020/7261654/9146749/09146795.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 18 reference(s) for this DOI; 18 parsed from the PDF.",
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    "volume": "129",
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