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We introduce a new video quality database that models video distortions in heavily-trafficked wireless networks and that contains measurements of human subjective impressions of the quality of videos. The new LIVE Mobile Video Quality Assessment (VQA) database consists of 200 distorted videos created from 10 RAW HD reference videos, obtained using a RED ONE(More)
Newly developed hypertext transfer protocol (HTTP)-based video streaming technologies enable flexible rate-adaptation under varying channel conditions. Accurately predicting the users' quality of experience (QoE) for rate-adaptive HTTP video streams is thus critical to achieve efficiency. An important aspect of understanding and modeling QoE is predicting(More)
We propose a referenceless perceptual fog density prediction model based on natural scene statistics (NSS) and fog aware statistical features. The proposed model, called Fog Aware Density Evaluator (FADE), predicts the visibility of a foggy scene from a single image without reference to a corresponding fog-free image, without dependence on salient objects(More)
Newly developed HTTP-based video streaming technology enables flexible rate-adaptation in varying channel conditions. The users' Quality of Experience (QoE) of rate-adaptive HTTP video streams, however, is not well understood. Therefore, designing QoE-optimized rate-adaptive video streaming algorithms remains a challenging task. An important aspect of(More)
The perception of motion and change are important mechanisms in a visual system. Suchow and Alvarez recently presented a "motion silencing" illusion, in which salient flicker (spatially localized repetitive changes in luminance, color, shape, or size) become undetectable in the presence of rapid motion. They also proposed a "misattribution" hypothesis,(More)
Motion can reduce the visibility of flicker distortions. We performed human subjective tests to investigate how motion influences the visibility of flicker distortions in naturalistic videos. Forty three naïve subjects participated in two tasks (" follow the moving object " and " view freely ") and reported their percepts on 36 test videos. Flicker(More)
Motion can impair the perception of other visual changes. Suchow and Alvarez (2011a, Current Biology, 21, 140-143) recently demonstrated a striking 'motion silencing' illusion, in which the salient changes among a group of objects' luminances (or colors, etc) appear to cease in the presence of large, coherent object motion. To understand why the visual(More)
1. Introduction Video traffic is exponentially increasing over wireless networks due to proliferating video technology and the growing desire for anytime, anywhere access to video content. Cisco predicts that two-thirds of the world's mobile data traffic will be video by 2017 [1]. This imposes significant challenges for managing video traffic efficiently to(More)
We study the influence of motion on the visibility of flicker distortions in naturalistic videos. A series of human subjective studies were executed to understand how motion silences the visibility of flicker distortions as a function of object motion, flicker frequency, and video quality. We found that flicker visibility is strongly reduced when the speed(More)
We study the effect of eccentricity on flicker visibility in naturalistic videos. A series of human studies were executed in two tasks ("gaze the fixation mark" and "follow the moving object") to understand how object motion can reduce the visibility of flicker distortions as a function of eccentricity, motion speed, video quality, and flicker frequency. We(More)