Awareness driven video quality of service in collaborative virtual environments

1998 ◽  
Author(s):  
Gail Reynard ◽  
Steve Benford ◽  
Chris Greenhalgh ◽  
Christian Heath
Keyword(s):  
Quality Of Service ◽  
Virtual Environments ◽  
Video Quality ◽  
Collaborative Virtual Environments

scholarly journals Disruptions to shared mental models from poor quality of service in collaborative virtual environments

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nicholas Milef ◽  
Adam Ryason ◽  
Di Qi ◽  
Samuel O. Alfred ◽  
Cullen D. Jackson ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Virtual Environments ◽  
Task Performance ◽  
Mental Model ◽  
Quality Of Experience ◽  
Poor Quality ◽  
Collaborative Virtual Environments ◽  
User Interactions ◽  
And Performance

AbstractCollaborative virtual environments are being used in various applications ranging from online games to complex team training scenarios. The key to the success of such environments is the ability of the participants to form a shared mental model of the collaborative task being performed. Poor quality of service can deteriorate user performance and quality of experience, leading to a disruption of this mental model. While the effects of quality of service have been analyzed for traditional desktop environments, these effects remain unclear in collaborative virtual environments during user-to-user interactions. Here, we analyze the role of latency and packet bursts, two common problems in collaborative applications, on both simulator perception and actual task performance in a collaborative fire-fighting simulator. This exploratory study indicates that large latencies have a significant (p < 0.05) impact on the quality of experience, but not task performance. In contrast, packet bursts have a much larger impact on both the quality of experience and performance. Additionally, the network role, such as whether a user is a client or server, showed a significant (p < 0.05) impact on task performance in conditions impaired by packet bursts.

Measuring ATM video quality of service using an objective picture quality model

1999 ◽  
Author(s):  
Jiuhuai Lu ◽  
Mainak Chatterjee ◽  
Mayer D. Schwartz ◽  
Mihir K. Ravel ◽  
Wilfried M. Osberger
Keyword(s):  
Quality Of Service ◽  
Video Quality ◽  
Picture Quality ◽  
Quality Model

scholarly journals The impact of quality of service parameters to the subjective and objective video quality assessment

2018 ◽  
Vol 15 (1) ◽  
pp. 97-114 ◽  
Author(s):  
Danilo Stanojevic ◽  
Boban Bondzulic ◽  
Boban Pavlovic ◽  
Vladimir Petrovic
Keyword(s):  
Quality Of Service ◽  
Subjective Experience ◽  
Objective Assessment ◽  
Video Quality ◽  
Destructive Effect ◽  
Objective Quality ◽  
Scatter Plots ◽  
Quality Of Service Parameters ◽  
The Impact

This paper deals with the delay, delay variation - jitter, packet loss rate and bandwidth as quality of service parameters, in the form of four types of video quality degradations. The impact of defined levels of degradation on subjective impressions (given as mean opinion scores) is analyzed. ReTRiEVED video dataset with publicly available subjective scores is used in the analysis. Three full-reference measures are used for objective assessment of video quality. The degree of consistency of subjective and objective quality scores is shown through scatter plots and quantitative measures (linear correlation coefficient and correlation of the ranks). Based on the interpolation functions, quality of service parameters are mapped to subjective experience. We show that jitter is a much more destructive effect than other degradation types.

Collaborative Virtual Environments and Multimedia Communication Technologies in Healthcare

2009 ◽  
pp. 399-409
Author(s):  
Maria Andréia F. Rodrigues
Keyword(s):  
Health Care ◽  
Virtual Environments ◽  
Integrated Care ◽  
High Speed ◽  
Communication Technologies ◽  
Academic Community ◽  
Collaborative Virtual Environments ◽  
Research Areas ◽  
Computing Technologies

This chapter shows how recent computing technologies such as collaborative virtual environments, high speed networks and mobile devices can be used for training and learning in healthcare providing an environment with security and quality of service. A number of studies have been conducted so far in these research areas. However, the development of integrated care has proven to be a difficult task. Therefore, we aim also to discuss the promising directions of the current work and growing importance on these subjects. This includes comparative analysis of the most relevant computer systems and applications developed so far that integrate modern computing technologies and health care. We believe this work is considered to be primarily for the benefit of those who are working in the field of computer science and health care, as well academic community, practitioners, and those involved in the development, implementation and study of integrated care using new computing technologies.

Quality of service for networked virtual environments

2004 ◽  
Vol 42 (4) ◽  
pp. 42-48 ◽  
Author(s):  
D. Gracanin ◽  
Yunxian Zhou ◽  
L.A. DaSilva
Keyword(s):  
Quality Of Service ◽  
Virtual Environments ◽  
Networked Virtual Environments

Video quality-of-service for consumer terminals - a novel system for programmable components

2003 ◽  
Vol 49 (4) ◽  
pp. 1367-1377 ◽  
Author(s):  
C. Hentschel ◽  
R.J. Bril ◽  
Yingwei Chen ◽  
R. Braspenning ◽  
Tse-Hua Lan
Keyword(s):  
Quality Of Service ◽  
Video Quality
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