2026-09-22T07:58:30Zhttps://bura.brunel.ac.uk/oai/request

oai:bura.brunel.ac.uk:2438/30632016-01-27T09:08:29Zcom_2438_23com_2438_58com_2438_8630com_2438_8620col_2438_3672col_2438_210col_2438_8638

Ghinea, G Gulliver, Stephen Richard 2009-02-26T11:25:19Z 2009-02-26T11:25:19Z 2004 http://bura.brunel.ac.uk/handle/2438/3063 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University. Distributed multimedia supports a symbiotic infotainment duality, i.e. the ability to transfer information to the user, yet also provide the user with a level of satisfaction. As multimedia is ultimately produced for the education and / or enjoyment of viewers, the user’s-perspective concerning the presentation quality is surely of equal importance as objective Quality of Service (QoS) technical parameters, to defining distributed multimedia quality. In order to extensively measure the user-perspective of multimedia video quality, we introduce an extended model of distributed multimedia quality that segregates quality into three discrete levels: the network-level, the media-level and content-level, using two distinct quality perspectives: the user-perspective and the technical-perspective. Since experimental questionnaires do not provide continuous monitoring of user attention, eye tracking was used in our study in order to provide a better understanding of the role that the human element plays in the reception, analysis and synthesis of multimedia data. Results showed that video content adaptation, results in disparity in user video eye-paths when: i) no single / obvious point of focus exists; or ii) when the point of attention changes dramatically. Accordingly, appropriate technical- and user-perspective parameter adaptation is implemented, for all quality abstractions of our model, i.e. network-level (via simulated delay and jitter), media-level (via a technical- and user-perspective manipulated region-of-interest attentive display) and content-level (via display-type and video clip-type). Our work has shown that user perception of distributed multimedia quality cannot be achieved by means of purely technical-perspective QoS parameter adaptation. 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No. of bitstreams: 14 Appendix+M+-+RoI+Adaptation+Software.pdf: 131845 bytes, checksum: dd80fcecc98afd4dc6e53bab56269ec7 (MD5) Appendix+L+-+RoI+Scripts.pdf: 233079 bytes, checksum: 530d53572ac50830c2d9e23214bddfa2 (MD5) Appendix+K+-+Movement+Detection.pdf: 341569 bytes, checksum: e06bb1456f42685a4c273967967b261e (MD5) Appendix+J+-+Edge+Detection.pdf: 527922 bytes, checksum: 7ae7eaaf8b2c333f6f50d7696ad26b3e (MD5) Appendix+I+-+Colour+Detection.pdf: 583753 bytes, checksum: 2cc26c979488f9ecaa1fa2e0df73c785 (MD5) Appendix+H+-+Image+Pixel+Distributions.pdf: 125176 bytes, checksum: 2993fd4940df079a2d5abccd64b36a85 (MD5) Appendix+G+-+Fixation+Map+Pixel+Distributions.pdf: 376227 bytes, checksum: 2ccad74f1a935486a689e32e122b02a3 (MD5) Appendix+F+-+Frame+difference.pdf: 182199 bytes, checksum: 45473faf37f8329009d9017acf8331d6 (MD5) Appendix+E+-+Object-Orientated+Data+Structure.pdf: 241929 bytes, checksum: b85a38235287d4bf43cb2909803a4779 (MD5) Appendix+D+-+State+Logic+Scripts.pdf: 74790 bytes, checksum: 7adb13e85f273e7f571cf3d1209b7b44 (MD5) Appendix+C+-+Saved+Data+Format.pdf: 62636 bytes, checksum: f698e91049b5fb01da453c4340bf6dcb (MD5) Appendix+B+-+Experimenal+Material.pdf: 2322831 bytes, checksum: 40998099206668e4ca65d532c695db20 (MD5) Appendix+A+-+Experimental+Questionnaire.pdf: 88159 bytes, checksum: 54bcc5b4d37a1fe57b21a6f16d77d6ce (MD5) Gulliver+Thesis.pdf: 3164262 bytes, checksum: 0867014c3a2d3e492520813751c856be (MD5) Previous issue date: 2004-09 131845 bytes 233079 bytes 341569 bytes 527922 bytes 583753 bytes 125176 bytes 376227 bytes 182199 bytes 241929 bytes 74790 bytes 62636 bytes 2322831 bytes 88159 bytes 3164262 bytes application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf en Brunel University, School of Information Systems, Computing and Mathematics School of Information Systems, Computing and Mathematics http://bura.brunel.ac.uk/bitstream/2438/3063/1/FulltextThesis.pdf Distributed multimedia User perception Quality of Service (QoS) Presentation quality Distributed multimedia quality: The user perspective Thesis