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    "abbrevTitle": "SMPTE Mot. Imag. J",
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    "abstract": "Traditional challenges for end-to-end streaming services are harder when considering 360° video content. One of these challenges relates to the lack of standardized methodologies for subjective 360° video quality assessment, especially for streaming services. This paper presents a methodology for 360° video streaming services, which inherits a lot from the existing International Telecommunications Union standards for subjective quality evaluation of 2D/3D video but also incorporates omnidirectionality. A new metric called similarity ring metric (SRM) is introduced. It measures the degree of similarity in watching patterns of a single subject or between different subjects for several subjective assessment tests. This metric enables a rejection criteria for test results. This paper also presents visual fatigue results for a subjective quality experiment.",
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    "authors": [
      {
        "name": "Igor D. D. Curcio"
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      {
        "name": "Henri Toukomaa"
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      {
        "name": "Deepa Naik"
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      "year": "2018",
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    "docLabel": "SMPTE Motion Imaging Journal ( Volume: 127, Issue: 7, August 2018)",
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      "version": "smpte-idams-publication@v1"
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    "docTitle": "360-Degree Video Streaming and Its Subjective Quality",
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    "doi": "10.5594/JMI.2018.2838818",
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    "href": "https://doi.org/10.5594/JMI.2018.2838818",
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    "issn": {
      "electronic": "2160-2492",
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      "print": "1545-0279",
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    "journalAcronym": "MIJR",
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    "keywords": [
      "360° Video",
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      "Test Methodology",
      "Virtual Reality Streaming"
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    "number": "7",
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    "pages": "28–38",
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    "publicationDate": "2018-08-01",
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