Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2003
Tezin Dili: İngilizce
Öğrenci: Özgür Deniz Önür
Danışman: ABDULLAH AYDIN ALATAN
Özet:This thesis proposes a novel system to determine the best representation of a video in the sense that, a user watching the video reaches the highest level of satisfaction possible, given the resource capabilities of the viewing device. Utility theory is used to obtain a utility function representing the user satisfaction as a function of video coding parameters, and the viewing device capabilities. The utility function is formulated as the weighted sum of three individual components. These components are chosen such that, the satisfaction on any one of the components is independent of the satisfaction on every other component. The advantage of such decomposition is the ability to express individual components as simple mathematical relations, modeling user satisfaction. Afterwards, the unknown parameters of these models are determined by results of subjective tests, performed by a multitude of users. Finally, simulated annealing is utilized to find the global optimum of this utility function representing the user satisfaction. Simulation results based on subjective viewing tests on a resource limited mobile device indicate a consistent user satisfaction by the determined optimal encoding parameters of the video.