Journal of Digital Convergence (디지털융복합연구)

The Society of Digital Policy and Management (한국디지털정책학회)
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Subjective Video Quality Evaluation and User Satisfaction according to Screen Size and Content Type : Comparison of UHD and UWV

화면크기와 콘텐츠유형에 따른 주관적 영상품질 평가와 이용자 만족도: UHD와 UWV 비교 분석

  • Cho, EunSun (Dept. of Consumer Science, Seoul National University) ;
  • Lee, Jin-Myong (Dept. of Consumer Science, Chungnam National University) ;
  • Rha, Jong-Youn (Dept. of Consumer Science, Seoul National University) ;
  • Park, Sunny (Dept. of Consumer Science, Seoul National University) ;
  • Koo, Hye-Gyoung (Dept. of Consumer Science, Chungnam National University) ;
  • Cho, YongJu (Tera-media Research Group, Electronics and Telecommunications Research Institute) ;
  • Seo, Jung-Il (Tera-media Research Group, Electronics and Telecommunications Research Institute)
  • Received : 2018.09.07
  • Accepted : 2018.12.20
  • Published : 2018.12.28
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Abstract

UHD (Ultra High Definition) broadcasting technology, and UWV (Ultra Wide Vision) which is the high quality panoramic video of wide view angle based on UHD, were commercialized in Korea for the first time in the world, and those are representative realistic video technologies that maximize the user's sense of presence. By comparing the user's subjective reaction of UHD and UWV, the purpose of this study is to systematically establish the user's subjective video quality evaluation. For this purpose, a large screen projection experiment is designed by setting the screen size (4k x 2k, 8k x 2k) and content types (sports, landscape, concert) as variables to measure the user's subjective video quality evaluation and satisfaction. As a result of the study, the users' evaluation of UWV was higher than UHD in all items of subjective video quality, and satisfaction. Moreover, the results showed the significant differences depending on the video contents. Based on the results of the research, the study proposed the points necessary for the development and commercialization of UWV panoramic technology, and suggestions for the future research.

우리나라가 세계 최초로 상용화한 초고화질의 UHD 방송기술과 UHD 기반 파노라마 영상기술인 UWV는 이용자의 실재감을 극대화하는 대표적인 실감영상 기술이다. 본 연구는 UHD와 UWV에 대한 이용자들의 주관적 반응을 다각도로 비교 분석함으로써 UWV의 영상품질을 체계적으로 평가하는 것을 목적으로 한다. 이를 위해 화면크기(4k x 2k, 8k x 2k)와 콘텐츠유형(스포츠영상, 풍경영상, 공연영상)에 따른 대화면 프로젝션 실험을 설계하고 UHD와 UWV에 대한 이용자의 주관적 영상품질 평가 및 만족도를 측정하였다. 연구결과, 주관적 영상품질과 만족도의 모든 항목에 있어서 UHD에 비해 UWV에 대한 이용자의 평가가 긍정적인 것으로 나타났으며, 세부 평가는 영상 콘텐츠유형에 따라 유의한 차이를 보였다. 연구결과를 바탕으로 UWV 파노라마 기술이 발전 및 상용화되는데 필요한 점들과 후속 연구 시 고려해야할 사항을 제언하였다.

Keywords

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Fig. 1. Research Environment

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Fig. 2. Contents for Research

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Fig. 3. Research scenario

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Fig. 4. Results of Interaction Effects

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Fig. 5. Results of Interaction Effects

Table 1. Contents and Screen Size for Research

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Table 2. General Characteristics of Participants

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Table 3. Comparison of Subjective Video Quality Assessments Between UHD and UWV

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Table 4. Comparison of Satisfaction Between UHD and UWV

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