Energy efficient mobile video streaming using mobility

Undeniably the support of data services over the wireless Internet is becoming increasingly challenging with the plethora of different characteristic requirements of each service type. Evidently, about half of the data traffic shifted across the Internet to date consists of multimedia content such as video clips or music files that necessitate stringent real-time constraints in playback and for which increasing volumes of data should be shifted with the introduction of higher quality content. This work recasts the problem of multimedia content delivery in the mobile Internet. We propose an optimization framework with the major tenet being that real-time playback constraints can be satisfied while at the same time enabling controlled delay tolerance in packet transmission by capitalizing on pre-fetching and data buffering. More specifically two strategies are proposed amenable for real time implementation that utilize the inherent delay tolerance of popular applications based on different flavors of HTTP streaming. The proposed mechanisms have the potential of achieving many-fold energy efficiency gains at no cost on the perceived user experience

Survey of Transportation of Adaptive Multimedia Streaming service in Internet

[DE] World Wide Web is the greatest boon towards the technological advancement of modern era. Using the benefits of Internet globally, anywhere and anytime, users can avail the benefits of accessing live and on demand video services. The streaming media systems such as YouTube, Netflix, and Apple Music are reining the multimedia world with frequent popularity among users. A key concern of quality perceived for video streaming applications over Internet is the Quality of Experience (QoE) that users go through. Due to changing network conditions, bit rate and initial delay and the multimedia file freezes or provide poor video quality to the end users, researchers across industry and academia are explored HTTP Adaptive Streaming (HAS), which split the video content into multiple segments and offer the clients at varying qualities. The video player at the client side plays a vital role in buffer management and choosing the appropriate bit rate for each such segment of video to be transmitted. A higher bit rate transmitted video pauses in between whereas, a lower bit rate video lacks in quality, requiring a tradeoff between them. The need of the hour was to adaptively varying the bit rate and video quality to match the transmission media conditions. Further, The main aim of this paper is to give an overview on the state of the art HAS techniques across multimedia and networking domains. A detailed survey was conducted to analyze challenges and solutions in adaptive streaming algorithms, QoE, network protocols, buffering and etc. It also focuses on various challenges on QoE influence factors in a fluctuating network condition, which are often ignored in present HAS methodologies. Furthermore, this survey will enable network and multimedia researchers a fair amount of understanding about the latest happenings of adaptive streaming and the necessary improvements that can be incorporated in future developments.Abdullah, MTA.; Lloret, J.; Canovas Solbes, A.; García-García, L. (2017). Survey of Transportation of Adaptive Multimedia Streaming service in Internet. Network Protocols and Algorithms. 9(1-2):85-125. doi:10.5296/npa.v9i1-2.12412S8512591-

MediaSync: Handbook on Multimedia Synchronization

This book provides an approachable overview of the most recent advances in the fascinating field of media synchronization (mediasync), gathering contributions from the most representative and influential experts. Understanding the challenges of this field in the current multi-sensory, multi-device, and multi-protocol world is not an easy task. The book revisits the foundations of mediasync, including theoretical frameworks and models, highlights ongoing research efforts, like hybrid broadband broadcast (HBB) delivery and users' perception modeling (i.e., Quality of Experience or QoE), and paves the way for the future (e.g., towards the deployment of multi-sensory and ultra-realistic experiences). Although many advances around mediasync have been devised and deployed, this area of research is getting renewed attention to overcome remaining challenges in the next-generation (heterogeneous and ubiquitous) media ecosystem. Given the significant advances in this research area, its current relevance and the multiple disciplines it involves, the availability of a reference book on mediasync becomes necessary. This book fills the gap in this context. In particular, it addresses key aspects and reviews the most relevant contributions within the mediasync research space, from different perspectives. Mediasync: Handbook on Multimedia Synchronization is the perfect companion for scholars and practitioners that want to acquire strong knowledge about this research area, and also approach the challenges behind ensuring the best mediated experiences, by providing the adequate synchronization between the media elements that constitute these experiences

Fort Vancouver Mobile

Mobile phones have become ubiquitous yet remain untapped as a storytelling medium. They offer the power of media, text, audio, video, animation, in a fully personalized format. Through GPS technology these devices even can locate a user and share, on the precise spot, data tailored just for that user's particular interest. Users then can add written responses, video or sound about a site or event. The implications for such authoring precision, audience awareness and interactivity pose exciting challenges to the team creating the Fort Vancouver Mobile project, a storytelling environment accessible via smart phones that tells the history of the Fort Vancouver National Historic Site. Phase I, just completed, comprises apps for the iPhone and Android and a story module focusing on Hawaiians who lived and worked at the site in the mid 1800s. Phase II, the focus on this proposal, seeks $50,000 to create modules focusing on gender issues at the site that have, heretofore, gone unexamined

Web Performance e as plataformas de venda online

As plataformas de venda de produtos online têm estado cada vez mais presentes na sociedade e no dia a dia das pessoas, sendo vendidos produtos de várias categorias como por exemplo, de vestuário, artigos tecnológicos, decoração, alimentação, entre outros. Todo o processo de compra online pode ditar o sucesso de uma empresa, sendo crucial garantir que todos os clientes tenham uma ótima experiência de compra sem qualquer tipo de fricção, pois estes impedimentos podem fazer com que o consumidor desista da sua intenção. Como consequência, não se pode menosprezar nenhum tipo de consumidor sendo imprescindível garantir que as aplicações de venda online possam ser acedidas com o mesmo nível de qualidade em qualquer tipo de ambiente ou dispositivo. A fluidez e a usabilidade de uma aplicação podem ser afetadas por vários fatores como por exemplo, as infraestruturas de telecomunicações, a capacidades de processamento dos diferentes dispositivos móveis, entre outros. Com o intuito de atingir uma experiência de compra fluída para todos os consumidores, será necessário desenvolver um protótipo focado no desempenho e na usabilidade, sendo, por isso, necessária a pesquisa e a implementação de conceitos relacionados com estes temas. Subsequentemente, este protótipo será implementado com o auxílio de vários padrões de performance, como por exemplo: a criação de um caminho crítico para o utilizador; a separação da aplicação em diferentes secções e o carregamento assíncrono de componentes. Foram concretizados dois tipos de testes para analisar a qualidade e a eficácia do protótipo. A fim de averiguar a usabilidade da aplicação foi realizado um inquérito de modo a verificar se o público alvo sentiu algum tipo de dificuldade na interação com o protótipo desenvolvido. Adicionalmente, foi também executada uma bateria de testes de desempenho de modo a comparar a aplicação desenvolvida com outras plataformas de venda online. Por fim, esta dissertação deve realçar a importância do tema de web performance e como este está diretamente interligado com o comportamento consumidores, apresentando boas práticas de desenvolvimento que devem ser seguidas para qualquer outro tipo de projeto ou aplicação.Online sales have been increasingly more present in society and in people’s daily lives. It has become more and more common to buy an item online, whether it is clothing, consoles, decorative items or others. The user journey in e-commerce platforms can dictate the success of a company, being crucial to ensure that all customers have a seamless experience without any interference, so they don't give up on the purchase. Consequently, every user should be able to have a fluent and consistent purchase experience, being the responsibility of the ecommerce platforms to ensure every web application provides a seamless journey for every consumer. However, the user experience can be affected by external factors like network speed, the hardware capacity of processing data, among others. In order to have a fast and flawless shopping experience, it was necessary to develop a prototype with a performance vision, where it was required to have an analysis and implementation of technical concepts, such as asynchronous loading and server side rendering. More specifically, it was implemented a diversity of performance patterns like the identification of the critical path, loading of external assets asynchronously and the split of application into different segments. Furthermore, it was essential to evaluate the quality and effectiveness of the developed prototype, so it was performed two different battery tests. In the first place, it was conducted a usability survey to understand if the consumers are really having a seamless and fast purchase experience. Secondly, and by the end, it was executed a performance test with the help of an external platform to gather different metrics and compare the developed prototype against other e-commerce platforms. Lastly, this dissertation must act as awareness of the benefits of web performance and how it directly affects the consumer's behaviour, being a reference for good practices to any other web application