비디오 스케일러빌리티에 대한 주관적 동영상 화질 평가 기법 비교
Comparing Subjective Test Methodologies for Quality Assessment of Video Scalability
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초록
멀티미디어 콘텐츠의 주관적 화질평가는 각종 멀티미디어 처리 기술의 성능을 결과물의 화질 관점에서 평가하기에 가장 정확한 방법이다. 표준화된 주관적 화질평가 기법들 중에 가장 널리 쓰이는 것은 단일자극 기법이다. 본 논문에서는 짝비교 기법이 단일자극 기법에 비해 가지는 장점을 평가실험의 단순성, 자극간의 화질 구분 가능성, 그리고 실험결과의 신뢰성 측면에서 보이고자 한다. 특별히 이러한 장점은 평가하고자 하는 화질의 변수가 다수인 경우에 유용하다. 비디오 스케일러빌리티의 화질평가에 대한 실험을 통해 이를 보인다.
Abstract
Subjective quality assessment of multimedia contents is an important step to obtain the most accurate judgment of the performance of various multimedia processing techniques in terms of perceived quality of the produced contents. Among standardized subjective test methodologies, the single stimulus methodology has been the most popular. This paper claims that the paired comparison methodology has advantages over the single stimulus methodology in terms of simplicity of tests, discriminability between stimuli and, consequently, reliability of the results, particularly for quality assessment problems involving multiple quality variables being compared at the same time. The claim is supported by experimental results on subjective quality assessment of video scalability.
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