The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Impact of the Varying Estimation Period on Subjective Video Quality Evaluation for IPTV Service

IPTV에서 평가주기 변화가 주관적 영상 화질 평가에 미치는 영향 분석

  • 하상용 (한국정보화진홍원) ;
  • 김진철 (한국정보화진홍원) ;
  • 정운영 (한국정보화진홍원) ;
  • 최재영 (성균관대학교 정보통신공학부) ;
  • 노병희 (아주대학교 정보통신전문대학원/정보컴퓨터공학부)
  • Received : 2011.02.28
  • Accepted : 2011.03.29
  • Published : 2011.04.30
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Abstract

There have been considerable standardization works to measure subjective video quality. However, these standardization methods are based on the situation where they have original or reference video sequences, and measure the video quality by looking the sequence during short time duration, e.g. 10 seconds. Since people's TV watching time durations in IPTV services are very long (e.g. more than 30 minutes), the quality measurements by the standards are not practical. In this paper, we analyze the effect of video quality rating period to MOS (Mean Opinion Score), and suggest a proper rating duration of subjective video quality for IPTV services.

영상 품질의 주관적 측정을 위한 다양한 표준 방법들이 제시되었으나, 이들 방법들은 원본 기준 영상이 존재하는 환경에서 10초 내외의 짧은 시간의 시청을 기반으로 한다. 그러나, IPTV 시청 환경에서는 장시간의 시청(예를들어 30분이상)이 이루어지므로, 표준 방법들에서의 10초 시간 주기의 평가는 현실적으로 적절하지 못하다. 본 논문에서는 IPTV 제공 환경에서 주관적 화질 평가를 위하여, 평가 주기 변화가 MOS에 미치는 영향을 분석하고 IPTV의 주관적 화질 평가에 적합한 평가 주기를 선정하기 위한 방안을 제시한다.

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References

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