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Minhas, Tahir Nawaz
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Publications (10 of 16) Show all publications
Molléri, J. S., Ali, N. b., Petersen, K., Minhas, T. N. & Chatzipetrou, P. (2018). Teaching students critical appraisal of scientific literature using checklists. In: ACM International Conference Proceeding Series: . Paper presented at 3rd European Conference of Software Engineering Education, ECSEE, Seeon Monastery, Germany (pp. 8-17). Association for Computing Machinery
Open this publication in new window or tab >>Teaching students critical appraisal of scientific literature using checklists
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2018 (English)In: ACM International Conference Proceeding Series, Association for Computing Machinery , 2018, p. 8-17Conference paper, Published paper (Refereed)
Abstract [en]

Background: Teaching students to critically appraise scientific literature is an important goal for a postgraduate research methods course. Objective: To investigate the application of checklists for assessing the scientific rigor of empirical studies support students in reviewing case study research and experiments. Methods:We employed an experimental design where 76 students (in pairs) used two checklists to evaluate two papers (reporting a case study and an experiment) each. We compared the students' assessments against ratings from more senior researchers. We also collected data on students' perception of using the checklists. Results: The consistency of students' ratings and the accuracy when compared to ratings from seniors varied. A factor seemed to be that the clearer the reporting, the easier it is for students to judge the quality of studies. Students perceived checklist items related to data analysis as difficult to assess. Conclusion: As expected, this study reinforces the needs for clear reporting, as it is important that authors write to enable synthesis and quality assessment. With clearer reporting, the novices performed well in assessing the quality of the empirical work, which supports its continued use in the course as means for introducing scientific reviews. © 2018 Association for Computing Machinery.

Place, publisher, year, edition, pages
Association for Computing Machinery, 2018
Keywords
Case study, Checklist, Critical appraisal, Experiment, Student, Design of experiments, Engineering education, Experiments, Software engineering, Teaching, Case study research, Continued use, Empirical studies, Post-graduate research, Quality assessment, Scientific literature, Students
National Category
Software Engineering
Identifiers
urn:nbn:se:bth-16892 (URN)10.1145/3209087.3209099 (DOI)2-s2.0-85049867400 (Scopus ID)9781450363839 (ISBN)
Conference
3rd European Conference of Software Engineering Education, ECSEE, Seeon Monastery, Germany
Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2018-08-20Bibliographically approved
Nawaz, O., Minhas, T. N. & Fiedler, M. (2017). QoE based comparison of H.264/AVC and WebM/VP8 in an error-prone wireless network. In: Chemouil P.,Simoes P.,Madeira E.,Secci S.,Monteiro E.,Gaspary L.P.,dos Santos C.R.P.,Charalambides M. (Ed.), Proceedings of the IM 2017 - 2017 IFIP/IEEE International Symposium on Integrated Network and Service Management: . Paper presented at 15th IFIP/IEEE International Symposium on Integrated Network and Service Management, IM 2017, Lisbon (pp. 1005-1010). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>QoE based comparison of H.264/AVC and WebM/VP8 in an error-prone wireless network
2017 (English)In: Proceedings of the IM 2017 - 2017 IFIP/IEEE International Symposium on Integrated Network and Service Management / [ed] Chemouil P.,Simoes P.,Madeira E.,Secci S.,Monteiro E.,Gaspary L.P.,dos Santos C.R.P.,Charalambides M., Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 1005-1010Conference paper, Published paper (Refereed)
Abstract [en]

Quality of Experience (QoE) management is a prime topic of research community nowadays as video streaming, online gaming and security applications are completely reliant on the network service quality. Moreover, there are no standard models to map Quality of Service (QoS) into QoE. HTTP media streaming is primarily used for such applications due to its coherence with the Internet and simplified management. The most common video codecs used for video streaming are H.264/AVC and Google's VP8. In this paper, we have analyzed the performance of these two codecs from the perspective of QoE. The most common end-user medium for accessing video content is via home based wireless networks. We have emulated an error-prone wireless network with different scenarios involving packet loss, packet delay and delay variation. The focus of this paper is evaluating the end user satisfaction with the multimedia content by subjective assessment using Mean Opinion Score (MOS). We have observed the overall superiority of H.264/AVC but the VP8 codec strongly gains ground in highly error-prone networks in terms of user satisfaction. © 2017 IFIP.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017
Keywords
H.264/AVC, Multimedia communication, QoE management, Quality of Experience, WebM(VP8), Errors, HTTP, Human computer interaction, Media streaming, Motion Picture Experts Group standards, Multimedia systems, Packet networks, Video signal processing, Video streaming, Wireless networks, Multi-media communications, Qoe managements, Quality of experience (QoE), Quality of service
National Category
Communication Systems
Identifiers
urn:nbn:se:bth-15217 (URN)10.23919/INM.2017.7987426 (DOI)2-s2.0-85029430735 (Scopus ID)9783901882890 (ISBN)
Conference
15th IFIP/IEEE International Symposium on Integrated Network and Service Management, IM 2017, Lisbon
Available from: 2017-09-29 Created: 2017-09-29 Last updated: 2017-09-29Bibliographically approved
Minhas, T. N., Shahid, M., Lövström, B., Rossholm, A., Zepernick, H.-J. & Fiedler, M. (2016). QoE rating performance evaluation of ITU-T recommended video quality metrics in the context of video freezes. Australian Journal of Electrical and Electronics Engineering, 13(2), 122-131
Open this publication in new window or tab >>QoE rating performance evaluation of ITU-T recommended video quality metrics in the context of video freezes
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2016 (English)In: Australian Journal of Electrical and Electronics Engineering, ISSN 1448-837X, Vol. 13, no 2, p. 122-131Article in journal (Refereed) Published
Abstract [en]

In real-time video streaming, video quality can be degraded due to network performance issues. Among other artefacts, video freezing and video jumping are factors that influence user experience. Service providers, operators and manufacturers are interested in evaluating the quality of experience (QoE) objectively because subjective assessment of QoE is expensive and, in many user cases, subjective assessment is not possible to perform. Different algorithms have been proposed and implemented in this regard. Some of them are in the recommendation list of the ITU Telecommunication Standardization Sector (ITU-T). In this paper, we study the effect of the freezing artefact on user experience and compare the mean opinion score of these videos with the results of two algorithms, the perceptual evaluation of video quality (PEVQ) and temporal quality metric (TQM). Both metrics are part of the ITU-T Recommendation J.247 Annex B and C. PEVQ is a full-reference video quality metric, whereas TQM is a no-reference quality metric. Another contribution of this paper is the study of the impact of different resolutions and frame rates on user experience and how accurately PEVQ and TQM measure varying frame rates.

Place, publisher, year, edition, pages
Taylor & Francis, 2016
Keywords
Freezing; Image quality; Quality of service; Video signal processing; Video streaming, Objective video quality; Quality of experience (QoE); Subjective video quality; Temporal quality; Video quality, Quality control
National Category
Signal Processing Communication Systems
Identifiers
urn:nbn:se:bth-13135 (URN)10.1080/1448837X.2015.1094855 (DOI)2-s2.0-84965031048 (Scopus ID)
Available from: 2016-10-04 Created: 2016-10-03 Last updated: 2016-12-19Bibliographically approved
Nawaz, O., Minhas, T. N. & Fiedler, M. (2014). Optimal MTU for Realtime Video Broadcast with Packet Loss - A QoE Perspective. In: 2014 9TH INTERNATIONAL CONFERENCE FOR INTERNET TECHNOLOGY AND SECURED TRANSACTIONS (ICITST): . Paper presented at International Conference for Internet Technology and Secured Transactions*, DEC 08-10, 2014, London, ENGLAND (pp. 396-401). IEEE
Open this publication in new window or tab >>Optimal MTU for Realtime Video Broadcast with Packet Loss - A QoE Perspective
2014 (English)In: 2014 9TH INTERNATIONAL CONFERENCE FOR INTERNET TECHNOLOGY AND SECURED TRANSACTIONS (ICITST), IEEE , 2014, p. 396-401Conference paper, Published paper (Refereed)
Abstract [en]

Multimedia applications have become the prime source of Internet traffic in recent years due to high bandwidth offered by almost all access mechanisms. This highlights the need of intense research efforts to improve the already demanding user perception levels for high-performance video delivery networks. Quality of Experience (QoE) based metrics are often used to quantify user satisfaction levels regarding an application or service. In this paper, we have analyzed the impact of variable frame sizes at link layer with different packet loss scenarios to evaluate the performance degradation of H.264 based live video streams from the end user perspective using subjective tests. We have focused on both subjective and objective quantitative measures to analyze the myth that smaller packets provide better quality in error-prone networks. We found that this assumption may not be true for some cases with a considerable packet loss ratio. Moreover, we observed that full-reference video assessment software like PEVQ predicts QoE to an acceptable extent, which allows cutting cost and effort coming with subjective evaluations. Keywords-Quality of Experience, Multimedia communication, Streaming media

Place, publisher, year, edition, pages
IEEE, 2014
Series
International Conference for Internet Technology and Secured Transactions, ISSN 2164-7046
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:bth-14580 (URN)000380428300061 ()978-1-908320-39-1 (ISBN)
Conference
International Conference for Internet Technology and Secured Transactions*, DEC 08-10, 2014, London, ENGLAND
Available from: 2017-06-19 Created: 2017-06-19 Last updated: 2017-06-19Bibliographically approved
Minhas, T., Shahid, M., Rossholm, A., Lövström, B., Zepernick, H.-J. & Fiedler, M. (2013). Assessment of the Rating Performance of ITU-T Recommended Video Quality Metrics in the Context of Video Freezes. In: : . Paper presented at Australasian Telecommunication Networks and Applications Conference. Christchurch, New Zealand: IEEE
Open this publication in new window or tab >>Assessment of the Rating Performance of ITU-T Recommended Video Quality Metrics in the Context of Video Freezes
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2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Video streaming and multimedia applications are getting popular with the growth of networks. In real-time video streaming, video quality can be degraded due to network performance issues. Among other artifacts, freezing and frame dropping are factors that influence user experience. Service providers, operators, and researchers are interested to measure the Quality of Experience objectively. Different algorithms have been proposed and implemented in this regard. Some of them are in the recommendation list of the ITU Telecommunication Standardization Sector (ITU-T). In this paper, we study the effect of the freezing artifact on user experience and compare the mean opinion score (MOS) of these videos with the results of two algorithms, Perceptual Evaluation of Video Quality (PEVQ) and Temporal Quality Metric, both being part of ITU-T Recommendation J.247 Annex B and C, respectively. Another contribution of this paper is the investigation of the impact of different resolutions and frame rates on user experience.

Place, publisher, year, edition, pages
Christchurch, New Zealand: IEEE, 2013
Keywords
Quality of Experience, Video Quality, Objective Video Quality Assessment, Subjective Video Quality Assessment, Perceptual Evaluation of Video Quality
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-6373 (URN)000343821400036 ()oai:bth.se:forskinfo4120E4D7E039C341C1257C360050A0DB (Local ID)oai:bth.se:forskinfo4120E4D7E039C341C1257C360050A0DB (Archive number)oai:bth.se:forskinfo4120E4D7E039C341C1257C360050A0DB (OAI)
Conference
Australasian Telecommunication Networks and Applications Conference
Available from: 2015-05-25 Created: 2013-12-03 Last updated: 2017-03-08Bibliographically approved
Minhas, T. N. & Fiedler, M. (2013). Quality of Experience Hourglass Model. Paper presented at International Conference on IEEE Computing, Management and Telecommunications (IEEE ComManTel). Paper presented at International Conference on IEEE Computing, Management and Telecommunications (IEEE ComManTel). Ho Chi Minh City: IEEE
Open this publication in new window or tab >>Quality of Experience Hourglass Model
2013 (English)Conference paper, Published paper (Refereed) Published
Abstract [en]

Recently, user perception has been receiving increasingly much attention of service providers, operators, manufactures and researchers. They are interested to know how the users perceive the quality of multimedia streaming services. To avoid the fatigue of subjective testing, they are interested to model the Quality of Experience (QoE) based on Quality of Service (QoS) and other measurable parameters. However, these parameters to estimate the QoE may differ per service. In this paper, we propose a conceptual model of QoE in parallel with the classical internet architecture hourglass model. Moreover conditions are highlighted under which QoE can be evaluated objectively from QoS without entailing other factors. The main is goal to understand the factors that are playing a significant role for QoE. We also discuss and explain the role of the application on QoE.

Place, publisher, year, edition, pages
Ho Chi Minh City: IEEE, 2013
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-6963 (URN)000318220400017 ()oai:bth.se:forskinfo7FC7337FFC49E5ADC1257B94002F3002 (Local ID)978-1-4673-2088-7 (ISBN)oai:bth.se:forskinfo7FC7337FFC49E5ADC1257B94002F3002 (Archive number)oai:bth.se:forskinfo7FC7337FFC49E5ADC1257B94002F3002 (OAI)
Conference
International Conference on IEEE Computing, Management and Telecommunications (IEEE ComManTel)
Available from: 2013-06-24 Created: 2013-06-24 Last updated: 2015-06-30Bibliographically approved
Shaikh, J., Fiedler, M., Minhas, T. N., Arlos, P. & Collange, D. (2012). Inferring User-perceived Performance of Network by Monitoring TCP Interruptions. Network Protocols and Algorithms, 4(2), 49-67
Open this publication in new window or tab >>Inferring User-perceived Performance of Network by Monitoring TCP Interruptions
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2012 (English)In: Network Protocols and Algorithms, ISSN 1943-3581, E-ISSN 1943-3581, Vol. 4, no 2, p. 49-67Article in journal (Refereed) Published
Abstract [en]

The fluctuating performance of wireless and mobile networks has triggered the need for smart algorithms to assess the user perception, resulting from the quality of network services. While efforts have been done to model the user experience resulting from the network performance, there is still the need for practical methods to assess the user-perceived performance, in the real environment. In this work, we present a set of criteria to observe the user behavior on the Web, passively from the network-level. The criteria are based on the monitoring of TCP control flags and HTTP requests. Thus, information about user actions performed in the web browser can be inferred by monitoring the TCP termination flags and by keeping track of the HTTP requests. Along the way, we also present some anomalies observed in the TCP connection termination process, which may result in performance degradation of Web transfers.

Place, publisher, year, edition, pages
Macrothink Institute, 2012
Keywords
Quality of Experience, Quality of Service, Network Monitoring, Network Measurements, Traffic Analysis
National Category
Telecommunications Computer Sciences
Identifiers
urn:nbn:se:bth-7266 (URN)10.5296/npa.v4i2.1357 (DOI)oai:bth.se:forskinfoAE43590D5DC90281C1257A5A0053D860 (Local ID)oai:bth.se:forskinfoAE43590D5DC90281C1257A5A0053D860 (Archive number)oai:bth.se:forskinfoAE43590D5DC90281C1257A5A0053D860 (OAI)
External cooperation:
Note

Open access journal

Available from: 2012-09-18 Created: 2012-08-14 Last updated: 2018-01-11Bibliographically approved
Minhas, T. N., Lagunas, O. G., Arlos, P. & Fiedler, M. (2012). Mobile video sensitivity to packet loss and packet delay variation in terms of QoE. In: : . Paper presented at 19th International Packet Video Workshop (PV). Munich, Germany: IEEE
Open this publication in new window or tab >>Mobile video sensitivity to packet loss and packet delay variation in terms of QoE
2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

With the growth of the mobile internet, the popularity of multimedia services and applications have increased rapidly. As a result, end-users become quality-conscious. To fulfill the users' expectations, the study of quality of experience (QoE) is becoming very important for both researchers and service providers. This paper analyses the impact on perceived quality of received videos encoded with the H.264 baseline profile, which is suitable for mobile video, and streamed through an emulated network with packet loss and packet delay variation. To evaluate the video QoE, tests are conducted on a mobile device and on a laptop. The users' responses show that the baseline profile of H.264 is very sensitive to packet loss and packet delay variation. Moreover, there is no considerable impact on users' perception either test is conducted on the mobile device or on the laptop by playing the same resolution video.

Abstract [sv]

Pappret beskriver sammanhang mellan förluster / fördröjningsvariation och s k "Quality of Experience", och visar dessutom att terminalen (bärbar dator eller smartphone) inte spelar någon särskild roll i kvalitetsutvärderingen genom slutanvändare.

Place, publisher, year, edition, pages
Munich, Germany: IEEE, 2012
Keywords
Quality of Experience, smartphone, laptop, H.264, baseline profile, packet loss, jitter
National Category
Telecommunications Computer Sciences
Identifiers
urn:nbn:se:bth-7260 (URN)10.1109/PV.2012.6229747 (DOI)oai:bth.se:forskinfoE727953F2F373A2DC1257A6000546E99 (Local ID)978-1-4673-0299-9 (ISBN)oai:bth.se:forskinfoE727953F2F373A2DC1257A6000546E99 (Archive number)oai:bth.se:forskinfoE727953F2F373A2DC1257A6000546E99 (OAI)
External cooperation:
Conference
19th International Packet Video Workshop (PV)
Note

IEEExplore: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6229747

Available from: 2012-09-18 Created: 2012-08-20 Last updated: 2018-01-11Bibliographically approved
Minhas, T. N. (2012). Network Impact on Quality of Experience of Mobile Video. (Licentiate dissertation). Karlskrona: Blekinge Institute of Technology
Open this publication in new window or tab >>Network Impact on Quality of Experience of Mobile Video
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

To an end user, Quality of Experience (QoE) matters more than Quality of Service (QoS) because she is the owner of her experience, which is the result of her perception. In recent times, QoE got increasingly much attention from service providers, operators, manufacturers and researchers. Amongst others, they are interested to know how the users perceive the quality of multimedia streaming and how to predict the QoE by measuring network performance parameters. Below the network layer, different access networks can be used, but the internet and transport layers remain the same for everyone on best-effort internet. We highlight a set of possible factors that are contributing towards the QoE, from network via transport to application layer, including applications, codecs, middleware and devices. To investigate the relationship of QoS and QoE, emulation-based experiments were designed. For the purpose of emulation, different shapers are in use by the research community. We selected three popular shapers, NetEm, NISTnet and KauNet, and investigated their emulation capabilities with focus on delay, delay variation and bit rate in order to be able to select the best-suited shaper for future use. Then, we studied the effect of QoS parameters on mobile video QoE. To evaluate the video QoE, user tests were conducted. We observe a much larger sensitivity of users to freezes and their placement within the video than what is predicted by an objective video quality assessment tool that is recommended by the standardisation organization ITU. Furthermore, we investigated the role of codec and device on QoE in view of network-induced problems.

Place, publisher, year, edition, pages
Karlskrona: Blekinge Institute of Technology, 2012. p. 145
Series
Blekinge Institute of Technology Licentiate Dissertation Series, ISSN 1650-2140 ; 3
National Category
Telecommunications Computer Sciences
Identifiers
urn:nbn:se:bth-00523 (URN)oai:bth.se:forskinfo3EE5C33C84D25374C12579BC003621E8 (Local ID)978-91-7295-227-0 (ISBN)oai:bth.se:forskinfo3EE5C33C84D25374C12579BC003621E8 (Archive number)oai:bth.se:forskinfo3EE5C33C84D25374C12579BC003621E8 (OAI)
External cooperation:
Available from: 2012-09-18 Created: 2012-03-09 Last updated: 2018-01-11Bibliographically approved
Shaikh, J., Fiedler, M., Arlos, P., Minhas, T. N. & Collange, D. (2011). Classification of TCP Connection Termination Behaviors for Mobile Web. In: : . Paper presented at Smart Communication Protocols and Algorithms (SCPA). Houston: IEEE
Open this publication in new window or tab >>Classification of TCP Connection Termination Behaviors for Mobile Web
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2011 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Many emerging smart applications and services employ Web technology, and users nowadays surf the Web from any device via any kind of access network. Typically, high page latencies trigger users to abort ongoing transfers, resulting in the abrupt terminations of the TCP connections. This paper presents a systematic study of the termination process of the TCP connections and identifies the reasons behind the observed sequences of termination flags. Monitoring and classification of the termination behavior of the TCP connections can provide indications about the user-perceived performance of Web transfers. From the results, it is observed that the TCP termination behavior is heavily-dependent on the client-side application. Therefore, a set of criteria is required to identify the abortions made by the user.

Place, publisher, year, edition, pages
Houston: IEEE, 2011
Keywords
TCP, Mobile, Web
National Category
Telecommunications Computer Sciences
Identifiers
urn:nbn:se:bth-7320 (URN)10.1109/GLOCOMW.2011.6162351 (DOI)000304097200208 ()oai:bth.se:forskinfo01EF68B1BCE1F842C1257994005DD0EA (Local ID)oai:bth.se:forskinfo01EF68B1BCE1F842C1257994005DD0EA (Archive number)oai:bth.se:forskinfo01EF68B1BCE1F842C1257994005DD0EA (OAI)
External cooperation:
Conference
Smart Communication Protocols and Algorithms (SCPA)
Available from: 2012-09-18 Created: 2012-01-29 Last updated: 2018-01-11Bibliographically approved
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