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    "abstract": "In this paper, we propose color rendering index (CRI) values for light-emitting diodes (LEDs) for use in ultra-high definition television (UHDTV) production. UHDTV cameras, designed with ideal camera spectral sensitivities according to the system colorimetry of Recommendation ITU-R BT.2020, can achieve highly accurate color reproduction in daylight. Because LED lighting is increasingly used in television production, it is important to elucidate the effects of its spectral power distribution on color reproduction. In this study, we performed subjective evaluations by comparing reference images captured under simulated standard lights with test images captured under LEDs of various CRI values. Based on our results, we recommend a CRI Ra value of 90 or higher and R₉ of 80 or higher.",
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      {
        "affiliation": "Panasonic Corporation Eco Solutions Company, 1048 Kadoma, Osaka 571-8686, Japan",
        "name": "Hiroaki Iwasaki"
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      {
        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya Tokyo 157-8510, Japan",
        "name": "Tetsuya Hayashida"
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      {
        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya Tokyo 157-8510, Japan",
        "name": "Kenichiro Masaoka"
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      {
        "affiliation": "Panasonic Corporation Eco Solutions Company, 1048 Kadoma, Osaka 571-8686, Japan",
        "name": "Masanori Shimizu"
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      {
        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya Tokyo 157-8510, Japan",
        "name": "Takayuki Yamashita"
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      {
        "affiliation": "Panasonic Corporation Eco Solutions Company, 1048 Kadoma, Osaka 571-8686, Japan",
        "name": "Wataru Iwai"
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    "docTitle": "Color Rendering Index Value Requirement for Wide-Gamut UHDTV Production",
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    "keywords": [
      "Light-emitting Diode (LED) Lighting",
      "Spectral Power Distribution",
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