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This paper shows the effectiveness and feasibility of a video output scheme the authors proposed previously to enhance QoE (Quality of Experience) (i.e., perceptual QoS) of audio-video IP transmission. The scheme, SCS(Switching between error Concealment and frame Skipping), utilizes a tradeoff relation between spatial and temporal quality caused by video error concealment and video frame skipping, both of which cope with video packet loss. The scheme switches from error concealment to frame skipping when the percentage of video slices error-concealed in a frame exceeds a threshold value, which is a key to achieving high QoE with SCS.
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