Digital video data, stored in video databases and distributed through communication networks, is subject to various kinds of distortions during acquisition, compression, processing, transmission, and reproduction. For example, lossy video compression techniques, which are almost always used to reduce the bandwidth needed to store or transmit video data, may degrade the quality during the quanti...

This paper presents a Reduced-Reference based video quality estimation method suitable for individual end-user quality monitoring of IPTV services. With the proposed method, activity values (spatial frequency levels) for individual given-size pixel blocks of an original video are transmitted to end-user terminals. At the end-user terminals, the video quality of a received video is estimated on ...

Department of Communication Engineering, Kwangwoon University, Korea Summary Recently, DASH (Dynamic Adaptive Streaming over HTTP) is gaining attention because it is possible to use an existing web server, and not be restricted by the firewall or NAT (Network Address Translator). However, the existing video quality adaptation methods for DASH do not consider the frequent change of video quality...

We present novel schemes for optimal OFDMA bitrate allocation towards video quality maximization in H.264 scalable video coding (SVC)-based 4G wireless systems. We use the rate and quality models for video characterization of the SVC extension of the H.264/AVC and develop the framework for optimal scalable video transmission. Subsequently, we derive the closed form solution of the optimal H.264...

The video segmentation is an important technique for improvement of quality of video on the basis of segmentation. Significance of this segmentation is analysis of video as deformation Video quality improvement and blurring of video. Various authors improve the quality of video using sliding window technique and using different noise filter but all these method are not accurate and suffering fo...

OBJECTIVE Suboptimal adherence to self-administered medications is a common problem. The purpose of this study was to determine the effectiveness of a video-game intervention for improving adherence and other behavioral outcomes for adolescents and young adults with malignancies including acute leukemia, lymphoma, and soft-tissue sarcoma. METHODS A randomized trial with baseline and 1- and 3-...

Conventional video traces (which characterize the video encoding frame sizes in bits and frame quality in PSNR) are limited to evaluating loss-free video transmission. To evaluate robust video transmission schemes for lossy network transport, generally experiments with actual video are required. To circumvent the need for experiments with actual videos, we propose in this paper an advanced vide...

Methods to assess the visual quality of digital videos as perceived by human observers are becoming important, due to large number of applications that target humans as the end users of video. In this paper a no-reference video quality assessment (VQA) algorithm is introduced. Characteristics of human visual system (HVS) is taken into considerations. The quality of video is calculated in compre...

introduction: video-assisted clinical instruction (vacid) has been found to be a beneficial teaching tool for various fields in dentistry. the aim of this interventional study was to compare the efficacy of live conventional demonstration (cd), video teaching, and vacid (video with explanation) methods in teaching of root canal treatment to undergraduate dental students. methods and materials: ...