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CHARACTERIZING VOICE AND VIDEO TRAFFIC BEHAVIOR OVER THE INTERNET
2005
New Trends in Computer Networks
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In this paper, we present our research on characterizing voice and video traffic behavior in large-scale Internet Videoconferencing systems. ...
by the variations of delay, jitter, lost and reordered packets in the network, on the end-user perception of audiovisual quality. ...
It is evident that network jitter has a higher impact on the audio packet loss compared to the impact of network delay or loss. ...
doi:10.1142/9781860947308_0009
fatcat:mw3fqpmlifce3feuyfaazvacvy
The process model of subjective quality assessment of videoconferencing in enterprise
2020
SHS Web of Conferences
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The process of quality assessment can help IT management to decide on the use of videoconferencing as a means of communication in business. ...
Videoconferencing is one of the most appropriate ways to transmit information online to participants not only during quarantine. ...
The paper was elaborated within VEGA No. 1/0388/20 IT Management in Enterprises in Slovakia: International Standards and Norms Versus Individual Business Processes -proportion 100 %. ...
doi:10.1051/shsconf/20208301015
fatcat:fjeds6xycfduhfdranqdlihqxm
Performance Measurement and Analysis of H.323 Traffic
[chapter]
2004
Lecture Notes in Computer Science
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assessment of various audio and video streams. ...
The popularity of H.323 applications has been demonstrated by the billions of minutes of audio and video traffic seen on the Internet every month. ...
We use these bounds to determine the impact of network health on end-user perception of audiovisual quality of H.323 applications. ...
doi:10.1007/978-3-540-24668-8_14
fatcat:b5pqytvmtza6rbtm3aqdkuhjo4
Quality Evaluation of Audio and Video Signals in Videoconferences
2020
Acta Polytechnica Hungarica
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Our test aimed to compare subjective methods of video quality evaluation with objective methods and to evaluate the impact of audio quality on the overall video sequence quality. ...
In general, occasional image disturbance has less impact on the perception of quality in comparison to the disturbances in an audio track. ...
One example is the subjective assessment of the quality of video in an audio-visual communications system (such as television or videoconferencing) [6] . ...
doi:10.12700/aph.17.7.2020.7.5
fatcat:wrvrndbuwbhrjfz6p3br6n2tv4
Video-mediated communication in hospice interdisciplinary team meetings: examining technical quality and content
2009
AMIA Annual Symposium Proceedings
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We assessed their audio and video quality using both a form that was filled out on site and a protocol for retrospective analysis. ...
This study aims to determine how videoconferencing quality impacts the style and content of communication between members of hospice interdisciplinary teams and patients and their families. ...
ACKNOWLEDGMENT This project was funded by the NIH National Cancer Institute, grant R21CA120179 Patient and Family Participation in Hospice Interdisciplinary Teams (Parker Oliver, PI). ...
pmid:20351836
pmcid:PMC2815404
fatcat:od5ql3tgpzfl7nyb4xrdbqmjve
Impact of Different Quality of Service Mechanisms on Students' Quality of Experience in Videoconferencing Learning Environment
2018
The Turkish Online Journal of Distance Education
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Hence, this study evaluates the impact of different Quality of Service mechanisms utilized in the infrastructure on students' Quality of Experience in videoconferencing learning environments. ...
Finally, application controls had greater impact on perceived students' Quality of Experience than the network ones, which correlated to performance behavior of the infrastructure. ...
Hence, they target the quality of delivered content via the utilized application, such as audio/video synchronization, terminal handling of media flows, video error concealment, etc. ...
doi:10.17718/tojde.444614
fatcat:n577lsd7wbah3mifvdkgy4uj7u
The Performance of Two-Dimensional Media Scaling for Internet Videoconferencing**Supported by grants from the IBM and Intel Corporations, the National Science Foundation (grants IRIS-9508514 & CCR-9510156), and the Advanced Research Projects Agency (grant number 96-06580)
[chapter]
2002
Readings in Multimedia Computing and Networking
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Here we report on our experiences with a novel media-scaling congestion control scheme that was implemented in an experimental version of the Intel ProShare TM videoconferencing system and tested over ...
interactive multimedia application on the Internet. ...
Acknowledgments We are indebted to Jorg Liebeherr at the University of Virginia for the remote use of his facilities to perform the experiments reported herein. ...
doi:10.1016/b978-155860651-7/50137-6
fatcat:afrlmgyx7jfcnpjmb3gsthnqqi
Conditions of Use, Reliability, and Quality of Audio/Video-Mediated Communications During In-Home Rehabilitation Teletreatment for Postknee Arthroplasty
2016
Telemedicine journal and e-health
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Physical therapists assessed the quality and impact of video-mediated communications after each TELE session on seven attributes. ...
following total knee arthroplasty (TKA) and (2) assess from the perspective of the providers, the quality attributes of the technology used and its impact on clinical objectives. ...
Funding from the Canadian Institutes of Health Research (CIHR) supported this research. P.B. was supported by a Fonds Recherche Qué bec-Santé (FRQ-S) research scholar award. ...
doi:10.1089/tmj.2015.0157
pmid:26958932
fatcat:2t4rbywv6vh2dpxn3p26p3vbxa
Preparing for Plastic Surgery Residency Interviews in a Virtual Era
2020
Plastic and Reconstructive Surgery, Global Open
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After the setup is complete, ensure optimal audio and video quality by conducting a trial run using the software with another party to assess clarity. ...
Consider purchasing a lapel microphone, external webcam, or specific video lighting sources to improve audio and video quality. ...
DISCLOSURE The authors have no financial interest to declare in relation to the content of this article.
ACKNOWLEDGMENTS
We thank Drs. ...
doi:10.1097/gox.0000000000003178
pmid:33173690
pmcid:PMC7647492
fatcat:377expwudbeahbonhtu5ovuzpy
Subjective evaluation of a 3D videoconferencing system
2014
Stereoscopic Displays and Applications XXV
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Whereas methods for subjective evaluation of traditional 2D videoconferencing systems are well established, the introduction of 3D requires an extension of the test procedures to assess the quality of ...
In this paper, we present a subjective evaluation of a prototype multiview autostereoscopic video conferencing system and suggest a number of possible improvements based on the results. ...
Ambient Room and Equipment Characteristics A list of parameters is provided in Recommendation P.920 [3] for typical viewing and listening conditions that are used in audio-visual quality assessment. ...
doi:10.1117/12.2037795
fatcat:tur6ptq2hfbtfmzdyrn2sd5j4y
Performance Measurement Methodologies and Quality of Service Evaluation in VoIP and Desktop Videoconferencing Networks
[chapter]
2000
Lecture Notes in Computer Science
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The present paper relates to performance and quality of service evaluation for VoIP (Voice over IP) and desktop videoconferencing services in IP networks. ...
Work is currently on-going in modelization of the TCP/IP protocol layer, in terms of performance aspects (delays, etc...). The resulting model will then be applied to ...
The end-to-end audio/video quality depends on input and output devices, analogue/digital and digital/analogue circuit noise, video and audio coding distortion, effects of bandwidth limitation in the IP ...
doi:10.1007/3-540-45494-2_8
fatcat:m4o6fgfp5ndarhgwfjpjbnbiiu
Remote imaging via FaceTime for potential long-distance diagnosis of suspected cardiac structural and shunt anomalies on contrast echocardiography (The RIFLE Study)
2014
ASEAN Heart Journal
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Video and audio quality were evaluated using a subjective scoring scale, while internet connection was assessed in terms of lag time to transmission (milliseconds), as well as download and upload speeds ...
Moreover, FaceTime was feasible, generating acceptable internet speeds as well as obtaining high audio and video quality scores at both ends of the transaction. ...
Acknowledgment The investigators of this study recognize the invaluable contribution of the following people in making the study possible: from the Non-invasive Cardiology Division ...
doi:10.7603/s40602-014-0014-0
fatcat:iwukiudpsbd4bn3c2ueofe2o4a
Towards Individual QoE for Multiparty Videoconferencing
2018
IEEE transactions on multimedia
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In this paper, we focus on the impact video quality has on conversations that revolve around objects that are presented over the video channel. ...
Index Terms-Multi-Party video conferencing, Quality of Experience, Over-the-top, subjective quality, quality metrics, user study ...
Impact of system factors on videoconferencing QoE and interaction Video quality for video conferencing is usually assessed with subjective tests (passive or active) based on which objective video quality ...
doi:10.1109/tmm.2017.2777466
fatcat:ipiywabo6jgn7bsonyqgc7gayi
Mobile Videoconferencing Apps for Telemedicine
2016
Telemedicine journal and e-health
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The quality and performance of several videoconferencing applications (apps) tested on iOS (Apple, Cupertino, CA) and AndroidÔ (Google, Mountain View, CA) mobile platforms using Wi-Fi (802.11), third-generation ...
The platform, network, and apps interact, and it is impossible to discuss videoconferencing experienced on mobile devices in relation to one of these factors without referencing the others. ...
Acknowledgments The research reported was supported by the Intramural Research Program of the National Institutes of Health and the National Library of Medicine. ...
doi:10.1089/tmj.2015.0027
pmid:26204322
pmcid:PMC4739126
fatcat:7ebxffwpxne4tjyzzs2r7ldl4u
Assessing disordered speech and voice in Parkinson's disease: a telerehabilitation application
2010
International journal of language and communication disorders
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The telerehabilitation application described in this study provides evidence for the delivery of online assessment for the dysarthric speech disorder associated with Parkinson's disease. ...
Online assessments were conducted via a personal computer-based videoconferencing system with store-and-forward capabilities, operating on a 128 kbit/s Internet connection. ...
The research forms part of the doctoral thesis of Gabriella Constantinescu at The University of Queensland, Australia. ...
doi:10.3109/13682820903470569
pmid:20102257
fatcat:h2d3nw6qjzh3hm4zkthfe5xudi
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