eprintid: 2754
rev_number: 10
eprint_status: archive
userid: 464
dir: disk0/00/00/27/54
datestamp: 2013-12-02 16:26:23
lastmod: 2016-08-22 10:27:09
status_changed: 2013-12-02 16:26:23
type: thesis
metadata_visibility: show
contact_email: ethesis@wit.ie
creators_name: Dadheech, Himanshu
creators_id: himanshu.dadheech@gmail.com
title: A Framework to Assess Video Quality for Unified Telephony Communications in Enterprise Networks
ispublished: unpub
subjects: rsrch_na
divisions: sci_compmath
full_text_status: public
keywords: Unified telephony communications, enterprise networks
abstract: Nowadays there are many audio-visual solutions involving person to person, multi-party
telephony and web conferencing, collectively termed Voice/Video over IP (VVoIP). End
users expect the quality of VVoIP to be either better than or at least equivalent to traditional
telephony. Thus, it is very important for Enterprises to analyze the performance
of their systems onto the network with respect to existing technology. Being a totally
IP based service, VVoIP is much more susceptible to network 
uctuations and end-user
application deployment. As an important requirement of end-user quality assurance,
this work describes a novel testing framework for assessing and analyzing the call quality
of unified telephony in enterprise networks in terms of Quality of Experience (QoE)
as perceived by the end user. This framework includes analysis of the system performance
under varied network conditions by emulation of network impairments. This
framework is suitable for network planning as it formulates the relationship between
network and application parameters and objective QoE scores. Packet loss pattern is
another issue which plays an important part in video QoE assessment. Video-over-IP
packets encapsulate encoded image frames of different type, functionality and size viz.
I, P and B frames. Thus, one IP packet dropped could result in losing single or multiple
frames having different level of importance and could impact the overall QoE in different
ways depending on the particular frame types that were lost. A critical situation
for video QoE is when important packets are lost which can deform not only a single
frame but consecutive frames as well, reducing QoE from an expected level in the given
network conditions and codec implementation. This work additionally presents a study
on the impact of loss of specific types of frames on overall video QoE.
date: 2013-09
date_type: submitted
pages: 111
institution: Waterford Institute of Technology
department: School of Science
thesis_type: masters
citation:   Dadheech, Himanshu  (2013) A Framework to Assess Video Quality for Unified Telephony Communications in Enterprise Networks.  Masters thesis, Waterford Institute of Technology.   
document_url: http://repository.wit.ie/2754/1/Himanshu_Dadheech_Thesis-signed.pdf