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This paper makes multidimensional QoE comparisons of GUIs for threshold selection in the QoE-based video output scheme SCS in audio-video IP transmission. SCS switches between error concealment and frame skipping by comparing the ratio of video slice loss in a video frame with a threshold value. For the purpose of adapting SCS to individual users' inclination, we need to create some appropriate threshold selection interfaces and give the option to select a threshold value to the user. We propose two new interfaces: a slide bar method (choosing a threshold value by a slide bar), and a two mode method (selection of one out of two modes by two buttons). In the latter, a threshold value is set according to the mode. To assess QoE multidimensionally, we conducted subjective experiments on four methods: the conventional error concealment method (100% method), a previously proposed interface called the radio button method (selecting a threshold value by four radio buttons) and the two new interfaces. As a result, we observe that the two new interfaces can achieve higher overall audiovisual QoE than the conventional 100% method and the radio button method. In addition, we show that the slide bar method achieves the highest controllability whereas it imposes a burden on the user and that the two mode method imposes the lightest burden on the user among the three interfaces while it provides high QoE.
Multimedia (ISM), 2012 IEEE International Symposium on
Date of Conference: 10-12 Dec. 2012