Thesis (Ed.D.)--University of Central Florida, 2008. / Adviser: LeVester Tubbs. Includes bibliographical references (p. 108-113).

No description available.

Thesis (M.S.)--Kutztown University of Pennsylvania, 2000. / Source: Masters Abstracts International, Volume: 45-06, page: 2715. Typescript. Includes bibliographical references (leaves 175-180) and abstract.

Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004. / Includes bibliographical references (leaves 92). Also available in electronic version. Access restricted to campus users.

Thesis (Ph. D.)--Ohio University, 1998. / Includes bibliographical references (leaves 266-282).

Major activity and interest has focused upon High and Enhanced Definition Television systems, for at least the past few decades. From the initial analogue approaches, which concentrated on purely television enhancements, the focus continues to fade more towards fully digital multi-program distribution and ultimately to multimedia solutions. The actual activities throughout Europe and America in launching the Digital Video Broadcasting, DVB and the Advanced Television System Committee, ATSC system, clearly identify that television enhancements are still alive. In parallel, discussions upon data broadcasting, predominantly within the current analogue television systems also have taken place. The underlying premise of the work presented, is based upon the objective to transmit a compatible enhanced definition television signal within the PALplus standard. A conceptual system is proposed as the framework for this research, containing both a pre-processing and data modulation block, which are coupled via suitable data compression methods. The preprocessing and the additional digital modulation technique has been identified as providing the potential of innovation from which the modulation provides generic digital sub-channels either for multimedia or enhanced resolution extensions. The originality of the pre-processing techniques is based upon the design of a dual channel sub-band system, which employs two dimensional diagonal filtering together with a Quadrature Mirror Filter bank. From a high definition input, this processing block produces only two sub-bands, rather than the usual four, from which the low pass element represents the compatible component. The high pass element conveys the residual in such a way that full horizontal and vertical resolution can be reconstructed during decoding. The proposed embedded data modulation strategy is based upon a double occupation of the colour subcarrier. This exploitation is possible due to the inherent phase alternation of the PAL systems so that an additional quadrature modulation of the two colour sub-carriers is feasible. Both, the pre-processing and modulation blocks introduce crosstalk distortions which compromise the overall efficiency and further encroach on the sensitive issue of compatibility. The thesis provides a complete analysis both theoretical and practical of the implications of these distortions and subsequently proposes solutions which either eliminate or suppress them to a level below a perceptual threshold.

Throughout the literature, researchers reported on the problems that post-secondary institutions have had with technology (Birchard, 2001; Green, 2003; Starrett & Rogers, 2003;). Given limited budgets and the need to train faculty and staff, many colleges have struggled to find a way to use technology to enhance, not hinder, pedagogy (Cuban, 2001; Oppenheimer, 2003). This study was conducted to examine the impact of the federally mandated change in the television standard to high definition television (HDTV) on Florida's community colleges. Surveys were sent to the chief technology officers of the 28 community colleges in Florida. Additionally, eight interviews were conducted in five of the institutions. From both the qualitative data and the quantitative data, a picture emerged of the institutions and the conversion status. Of the 17 survey respondents, 11 reported no plans for conversion. Of those that did have plans for conversion, few concrete details were reported. Instead, the representatives of the institutions seemed to believe that it was not necessary to make plans for the change to HDTV. Costs represented the major concern of the survey respondents with implementation and training listed as the second and third most important issues. Many participants from the community colleges had some thoughts about HDTV, but these were more on the departmental level rather than college-wide. HDTV was projected to become the television standard in February 2009. The long lead time on this innovation should have provided community colleges with time to plan. As revealed, however, community colleges in Florida failed to plan for change.

Thesis (Ph. D.)--University of Pittsburgh, 1996. / Includes bibliographical references (leaves 177-185).

Thesis (Ph. D.)--University of Hawaii at Manoa, 1994. / Includes bibliographical references (leaves 375-391). / Microfiche. / 2 v. (xix, 391 leaves, bound) ill. 29 cm

Après l'entrée dans l'ère du numérique, la consommation vidéo a évolué définissant de nouvelles tendances. Les contenus vidéo sont désormais accessibles sur de nombreuses plateformes (télévision, ordinateur, tablette, smartphone ... ) et par de nombreux moyens, comme les réseaux mobiles, les réseaux satellites, les réseaux terrestres, Internet ou le stockage Blu-ray par exemple. Parallèlement, l'expérience utilisateur s'améliore grâce à la définition de nouveaux formats comme l'Ultra Haute Définition (UHD), le « High Dynamic Range » (HDR) ou le « High Frame Rate » (HFR). Ces formats considèrent une augmentation respectivement de la résolution, de la dynamique des couleurs et de la fréquence d'image. Les nouvelles tendances de consommation et les améliorations des formats imposent de nouvelles contraintes auxquelles doivent répondre les codeurs vidéo actuels et futurs. Dans ce contexte, nous proposons une solution de codage vidéo permettant de répondre à des contraintes de codage multi-formats, multi-destinations, rapide et efficace en termes de compression. Cette solution s'appuie sur l'extension Scalable du standard de compression vidéo « High Efficiency Video Coding » (HEVC) définie en fin d'année 2014, aussi appelée SHVC. Elle permet de réaliser des codages scalables en produisant un unique bitstream à partir d'un codage sur plusieurs couches construites à partir d'une même vidéo à différentes échelles de résolutions, fréquences, niveaux de qualité, profondeurs des pixels ou espaces de couleur. Le codage SHVC améliore l'efficacité du codage HEVC grâce à une prédiction inter-couches qui consistent à employer les informations de codage issues des couches les plus basses. La solution proposée dans cette thèse s'appuie sur un codeur HEVC professionnel développé par la société Ateme qui intègre plusieurs niveaux de parallélisme (inter-images, intra-images, inter-blocs et inter-opérations) grâce à une architecture en pipeline. Deux instances parallèles de ce codeur sont synchronisées via un décalage inter-pipelines afin de réaliser une prédiction inter-couches. Des compromis entre complexité et efficacité de codage sont effectués au sein de cette prédiction au niveau des types d'image et des outils de prédiction. Dans un cadre de diffusion, par exemple, la prédiction inter-couches est effectuée sur les textures pour une image sur deux. A qualité constante, ceci permet d'économiser 18.5% du débit pour une perte de seulement 2% de la vitesse par rapport à un codage HEVC. L'architecture employée permet alors de réaliser tous les types de scalabilité supportés par l'extension SHVC. De plus, pour une scalabilité en résolution, nous proposons un filtre de sous-échantillonnage, effectué sur la couche de base, qui optimise le coût en débit global. Nous proposons des modes de qualité intégrant plusieurs niveaux de parallélisme et optimisations à bas niveau qui permettent de réaliser des codages en temps-réel sur des formats UHD. La solution proposée a été intégrée dans une chaîne de diffusion vidéo temps-réel et montrée lors de plusieurs salons, conférences et meetinqs ATSC 3.0. / After entering the digital era, video consumption evolved and defined new trends. Video contents can now be accessed with many platforms (television, computer, tablet, smartphones ... ) and from many medias such as mobile network or satellite network or terrestrial network or Internet or local storage on Blu-ray disc for instance. In the meantime, users experience improves thanks to new video format such as Ultra High Definition (UHD) or High Dynamic Range (HOR) or High Frame Rate (HFR). These formats respectively enhance quality through resolution, dynamic range and frequency. New consumption trends and new video formats define new constraints that have to be resolved by currents and futures video encoders. In this context, we propose a video coding solution able to answer constraints such as multi-formats coding, multi­destinations coding, coding speed and coding efficiency in terms of video compression. This solution relies on the scalable extension of the standard « High Efficiency Video Coding » (HEVC) defined in 2014 also called SHVC. This extension enables scalable video coding by producing a single bitstream on several layers built from a common video at different scales of resolution, frequency, quality, bit depth per pixel or even colour gamut. SHVC coding enhance HEVC coding thanks to an inter-layer prediction that use coding information from lower layers. In this PhD thesis, the proposed solution is based on a professional video encoder, developed by Ateme company, able to perform parallelism on several levels (inter-frames, intra-frames, inter-blocks, inter-operations) thanks to a pipelined architecture. Two instances of this encoder run in parallel and are synchronised at pipeline level to enable inter-layer predictions. Some trade-off between complexity and coding efficiency are proposed on inter-layer prediction at slice and prediction tools levels. For instance, in a broadcast configuration, inter-layer prediction is processed on reconstructed pictures only for half the frames of the bitstream. In a constant quality configuration, it enables to save 18.5% of the coding bitrate for only 2% loss in terms of coding speed compared to equivalent HEVC coding. The proposed architecture is also able to perform all kinds of scalability supported in the SHVC extension. Moreover, in spatial scalability, we propose a down-sampling filter processed on the base layer that optimized global coding bitrate. We propose several quality modes with parallelism on several levels and low-level optimization that enable real-time video coding on UHD sequences. The proposed solution was integrated in a video broadcast chain and showed in several professional shows, conferences and at ATSC 3.0 meetings.