This paper presents the impact of traffic shaping on the quality of MPEG-2 video transmissions over ATM networks. The performance evaluation is accomplished by simulating an ATM network using real MPEG2 video streams from video broadcast applications. First, it is shown how cell loss influences the perceived video quality. Cell loss can result in either frame corruption or frame loss, which cau...

The main task of HTTP Adaptive Streaming is to adapt video quality dynamically under variable network conditions. This is a key feature for multimedia delivery especially when quality of service cannot be granted network-wide and, e.g., throughput may suffer short term fluctuations. Hence, robust bitrate adaptation schemes become crucial in order to improve video quality. The objective, in this...

Mental health issues are a growing problem worldwide, and their detection can be complicated. Assessments such as the Patient Health Questionnaire (PHQ-9) Generalized Anxiety Disorder (GAD-7) questionnaire useful tools for detecting depression anxiety, however, due to being self-reported, patients may underestimate own risk. To address this problem, two new assessments introduced, i.e., PHQ-V G...

The paper presents the results of subjective and objective quality assessments H.264-, H.265-, VP9-encoded video. Most literature is devoted to assessment in well-defined laboratory circumstances. However, end users usually watch films their home environments, which may be different from conditions recommended for measurements. This cause significant differences scores. Thus, aim research show ...

This study investigated how gifted children with dyslexia might be able to mask literacy problems and the role of possible compensatory mechanisms. The sample consisted of 121 Dutch primary school children that were divided over four groups (typically developing [TD] children, children with dyslexia, gifted children, gifted children with dyslexia). The test battery included measures of literacy...

background: postpartum depression (ppd) is a common problem after child's birth and may influence the quality of life (qol). investigation of postpartum qol and depression can be useful for better care for mothers and improvement of their well-being. objectives: the objective of this study was to assess the life quality in mothers with and without ppd. patients and methods: in a prospective stu...

the appropriate video quality level for a given video The Institute for Telecommunication Sciences is conducting research to develop an objective video for a video quality assessment system that utilizes quality assessment system that emulates human perception. The system should return results that agree closely with quality judgements made by a large panel of viewers. Such a system is valuable...

BACKGROUND/AIM Two studies assessed the effectiveness of video prompting as a strategy to support persons with mild and moderate Alzheimer's disease in performing daily activities. METHODS In study I, video prompting was compared to an existing strategy relying on verbal instructions. In study II, video prompting was compared to another existing strategy relying on static pictorial cues. Vide...

This paper presents an approach for assessing the perceptual quality of wireless video networking applications transmitted via WiMAX, the Worldwide Interoperability for Microwave Access air interface standard. The Video Quality Model developed by Information Administration’s Video Quality Expert Group is used to benchmark perceptual video quality.