This diploma thesis deals with the current phenomenon of video on-demand and the strategy of the streaming company Netflix when entering the European market. In the opening chapters it is necessary to explain the boom of the video on-demand services (VoD) in the context of television history and its position in relation to traditional linear broadcasting. Subsequently, the dramaturgical line and the programming offer of the company are presented , which is undoubtedly a competitive advantage of Netflix. In this context, Netflix's biggest competitors and their approach to production of original content are mentioned. The challenges Netflix is facing in its international expansion are also mentioned, including the need to tailor its offer and produce local content when entering new markets. Afterwards the European market as a whole is analyzed with regard to the specificities of the region and the key steps that were necessary to successfully start doing business on the continent. Last but not least, the thesis examines the position and development tendencies of Netflix in the field of original production in selected three European markets - Norway, France and the Czech Republic. In this part, Netflix is compared to other VoD competitors in these markets as well as by established players such as...

[pt] Esta pesquisa tem como tema as transformações do audiovisual sob o viés do design, a partir da digitalização dos suportes, conectividade e convergência das mídias. Esta digitalização trouxe uma série de mudanças na cadeia produtiva e na experiência audiovisual. A pesquisa busca elucidar, neste contexto de convergência de mídias, como são ressignificados os elementos de design. Partindo do pressuposto de que, na medida em que novos suportes elaboram novas condições e novos hábitos, os elementos de design são ressignificados em suas aplicações. A dissertação tem como objetivo compreender como os elementos do design se comportam em um novo cenário digital, aponta como as transformações tecnológicas afetam a experiência e analisa essas transformações no design, nas possibilidades de interatividade, no videografismo e na passagem para a tridimensionalidade. Apresenta, ainda, tendências da aplicação do design em vídeo sob demanda e em variações tecnológicas. Explora aspectos da narrativa não linear em suportes de imagens em movimento e apresenta um experimento em realidade virtual, realizado de forma colaborativa e interdisciplinar. Esta é uma pesquisa exploratória com abordagem qualitativa e alguns experimentos práticos que observam a aplicação do design nos diferentes meios. / [en] This research is about the transformations in audiovisual, under design s perspective, which are consequences from the digitalization of media, connectivity, and media convergence. The digitalization phenomenon has arisen a considerable number of transformations into productive chains as well as in audiovisual experience. This research tries to elucidate, in this context of media convergence, how design elements are reframed. Based on the assumption that new media may conduct to new conditions and new habits, the design elements are reframed and transformed by its applications in the audiovisual products. This dissertation aims to understand how design elements behave in a new digital audiovisual scenario, pointing out how technological transformations affect the experience, and analyzing these transformations into the design field, into possibilities of interaction, motion graphics and the transition to tridimensional. It also presents some trends of design applications into video on demand and new technological possibilities, exploring implications of using nonlinear narratives in moving image media. Also, this dissertation presents an experiment in virtual reality which was a result of a collaborative and interdisciplinary effort. This is an exploratory research based on quality approach and it presents some case studies related to design applications in various media.

Clustering is a technology within unsupervised learning with a wide range of applications. Several of these applications use data that change over time, which makes clusters’ persistence of interest. One among these employments of clustering time-variant data is preference based customer segmentation. Preferences are assumed to change over time and it is thus of interest to know for how long clusters based on preferences remain. This study explores clusters of clients obtained in the segmentation analysis of users of a video streaming service and their persistence over time. The clients were clustered based on viewing history from distinct months with the k-means algorithm. Various metrics, such as Rand Index (RI), Adjusted Rand Index (ARI) and Fowlkes-Mallows score, were employed for evaluation of cluster persistence. It was found that most of the identified clusters did not show persistence over months but that most partitions included at least one clustered that was considered persistent. The results also suggested that clusters featured by titles that target children were more persistent than other clusters. Moreover, clients with a large interest in videos within the children genres appeared to form relatively separated clusters, which supports considering consumers of children titles as a separate target group. / Klustring är en teknik inom oövervakad maskininlärning med en mängd applikationer. Flera av dess applikationer använder data som förändras med tid, vilket gör klusters bestående intressant. En av dessa användningar av klustring av tidsberoende data är preferensbaserad kundsegmentering. Preferenser antas förändras med tid och det är således av intresse att veta hur länge kluster baserade på preferenser förblir. Den här studien utforskar klient-kluster erhållna genom segmenteringsanalys av användare av en video-strömningstjänst och dessas beständighet över tid. Klienterna klustrades baserat på deras tittarhistorik från olika månader med k-means. Flertalet mätvärden, såsom RI, ARI och Fowlkes-Mallows, användes för att utvärdera klusters fortlevnad i termer av överlapp av klienter. Fortlevnad över månader visades inte vara norm bland de identifierade klustren. Resultaten visade också på att kluster som präglades av titlar riktade mot barn var mer beständiga än andra kluster. Vidare tycktes klusters top-titlar antingen uteslutande utgöras av titlar riktade mor barn eller inte inkludera några titlar riktade mot barn, vilket stödjer hantering av konsumenter av barntitlar som en separat målgrupp.

The media landscape is changing and Internet-based streaming services for children are becoming increasingly popular. The concept of online streaming extends freedom and control over content selection but discovering new content is often experienced as troublesome. The objective of this thesis is to identify parameters to make it easier for users of streaming services for children to discover and watch unfamiliar programs. Guidelines are formed based on literature studies, interviews, observations, a survey, a benchmark, data analysis with Adobe Analytics, a workshop and finally user tests with prototypes. These guidelines conclude that content should be categorized, dynamicized, highlighted and socially engaging. Categorization based on age is primarily important but interests and genres can also be used to make children more interested in a title. Content should be dynamic, customizable and personal to each user to give more accurate recommendations based on age and interests. Making one alternative more visually prominent will make this alternative more interesting especially for younger children and social features with information about other users opinions can motivate a decision to discover new content among older children.

In der vorliegenden Examensarbeit geht es um eine eingehende Analyse der Figur des Evangelisten in der Johannes-Passion von J. S. Bach. Mit Hilfe eines interdisziplinären und intermedialen Ansatzes soll der Frage nachgegangen werden, welche Bedeutung er als Erzählfigur für das Werk allgemein und für den Rezipienten im Besonderen hat. Wie wichtig sein Erzählbewusstsein im Hinblick auf ein zunehmend medialisiertes und säkularisiertes Publikum ist, soll dabei ebenso beleuchtet werden, wie die Kraft seiner Performativität - sein Potential als theatrale Figur. Der Blick auf eine aktuelle Inszenierung, in diesem Fall die gestreamte Fassung der Johannes-Passion von Peter Sellars in Zusammenarbeit mit den Berliner Philharmonikern aus dem Jahr 2019 sowie den Libretto-Text des Evangelisten ermöglicht das Untersuchen von Erzählweise, Kommunikationsstrategie und Spielart dieser spannenden und komplexen ErzählerFigur. Der Fokus auf das epische Moment und die strukturell/dramaturgische Bedeutung des Evangelisten ist dabei bewusst gewählt, da sie mir für die praktische Vermittlung und Darstellung des Evangelisten als relevant erscheinen. / This degree thesis entails a thorough analysis of the Evangelist-character in the St. John Passion from J. S. Bach. With the help of an interdisciplinary and intermedial approach, the question to be investigated is: which meaning does he have as a narrative figure for the work in general and for the recipient in particular? How important his narrative consciousness is in view of an increasingly medialized and secularized audience should also be illuminated, as well as the power of his performativity - his potential as a theatrical character. The look at a current production, in this case the streamed version of the St. John Passion from Peter Sellars in collaboration with the Berlin Philharmonic from 2019 as well as the libretto of the Evangelist, enables the exploration of narrative style, communication strategy and way of acting of this exciting and complex narrator figure. The focus on the epic moment and the structural/dramaturgical meaning of the Evangelist is deliberately chosen, because I deem them relevant to the practical mediation and presentation of the Evangelist.

Video-on-demand streaming從90年代就在適當的科技下成為網際網路流量的龍頭，故宮教育頻道在技術上採用TCP-based video streaming，但Video streaming使得負載較一般的伺服器繁重。透過負載平衡來分散負載是可行的方式之一，但在TCP-based video streaming的技術下，還是可能遭遇服務品質之相關議題。而服務品質要求 (Quality of Service, QoS)是用來對使用者適配的服務品質表現，做具體之等級劃分的管理工具，本研究以故宮教育頻道 (iPalace Video Channel; iPalace)為標的，針對其DNS Load Balancing搭配Round Robin的運作背景，提出VM Side QoS及Client Side QoS，在VM Side設定Load rate作為指標、在Client Side則以撥放器的表現為主，設定Initial Buffering Time、Mean Rebuffering Duration以及Rebuffering Frequency共三個指標，並搭配流量的實驗操作，劃分Regular及Class情境來蒐集資料。 在分析後發現，在環境較為一致的Class情境中，Mean Rebuffering Duration與Load Rate及Rebuffering Frequency與Load Rate具有低度正相關。未來，若能在環境及客戶端的變異性有較多的控制及掌握，則可讓資料在蒐集上更為正確，讓後續的分析及探討與實際狀況更為相符。

日前行政院提出施政報告時指出，將以「挑戰二OO八」作為目標，研議一項為期六年的「國家總體建設計畫」，計畫中又以「兩兆雙星」的產業政策最受矚目，計畫中，數位內容產業是其中一環，希望能在2006年達到三千七百億台幣的產值，增加四萬個以上就業機會﹔經濟部甚至將成立「數位內容學院」，幫助數位產業培養傑出人才，強化國家的競爭力，台灣更訂定2006年為數位電視元年，全面轉換現有類比電視系統，進入數位化電視時代。 所謂「數位電視」時代，泛指數位電視之節目訊號採用數位影音訊號壓縮技術（Digital Video/Audio Compression），透過數位編碼（Digital Coding）與數位調變（Digital Modulation）來傳輸，並具有結合其他數位資料一起廣播之能力。 台灣的無線電視台早在2000 年舉行試播典禮，每天有五小時的數位節目播送﹔五大有線電視多系統經營者，（Multiple System Operator，簡稱MSO），包括東森、和信、台灣寬頻通訊顧問公司、太平洋聯網科技及其他，五大系統商掌控全台將近90%的有線電視收視戶，發展數位電視也最積極﹔衛星電視台如年代，也以衛星直播網路（Direct PC）方式播送數位電視﹔連電信業者如中華電信，更於2000年中成立「互動式多媒體處」，提供用戶互動式影音服務。 本文研究以「創新行銷」、「價值擴散」之理論為主軸，主要探討數位電視相關產業，未來能否成功，或被視聽大眾所接受，本研究之主要目的如下 一、 數位內容與創新擴散模式之關係：不同之數位電視業者，提供哪些不同　　　　　　之數位內容？能吸引哪些消費大眾 二、 數位電視之系統採用與創新擴散模式之關係 三、 數位電視之價格策略用與創新擴散模式之關係 四、 數位電視之使用簡便性與創新擴散模式之關係 本研究以歷史文獻分析法為研究主軸，蒐集國內外相關文獻、書籍、報告、期刊、論文等資料來源加以整理分析，並以國內現有之數位電視業者及其發展之商品，如何進行創新擴散，加以介紹、分析、比較，進而探討出其未來可能之發展與建議。 / The administrative Planning Report passed recently by the Executive Yuan indicates that taking [Challenge 2008] as the target, plan and discuss a 6-year plan, named [National General Construction Planning], and of which the policies for [The Two Trillion, Twin Stars] industry attracts more attention and the digital industry is one of sectors in the planning. We expect the production value would be up to NTD 370 billion in 2006, and increase more than forty thousand job opportunities; even the Ministry of Economy would establish [Digital Institute], for helping educate the outstanding talents in digital industry and sharpen the national competitive edge; and the year of 2006, which was regarded as the Digital Video Year by the Taiwan government, will witness the process of changing the simulating video system into digital video era completely. What is called [Digital Video] era, it is generally referred to the program signal for digital video adopted with Digital Video/Audio Compression technique, and through Digital Coding and Digital Modulation to transmit the message, and has the capability of broadcasting combined by other digital information. Early in 2000, the trying-out broadcasting cerebration of the Radiovision Station in Taiwan was held, and the digital program was broadcasted for five hours everyday; The big five CATV Multiple System Operator (MSO) includes Eastern Television, KG Telecom, Taiwan Broadband Communication Corporation (ANET), Pacific Broadband Company Limited, and others, which control nearly 90% CATV audiences, and develop the Digital Video actively too; The satellite TV station like ERA also broadcasts the digital video by the way of Direct PC; and the communication operator like Chunghwa Telecom established “Interactive Multimedia Office” to provide the interactive video service in 2000. The theory of “Innovative Marketing” and “Value Extending” is taken as the principle in this research, discussing mainly the digital video and interrelated industries, whether it is successful or not, or accepted by the audience. The main proposes as followings: I. The relations between digital and innovative extending; will different digital video operator provide different digital programs? What kind of audience would be attracted? II. The relations between digital video system and innovative extending model III. The relations between the price strategy of digital video and innovative extending model IV. The relations between the convenience of digital video and innovative extending model This research took historic literature analysis as its researching principle, based on the collection and analysis of interrelated literature, book, report, periodical and article etc. information in domestic and oversea, and introduce, analyze and compare how they innovate and extend upon the existing products developed by the digital video operator in domestic, and further discuss its future orientation and suggestion.

Com o aumento da concorrência sofrido pelas operadoras de telecomunicações frente à entrada de diversas empresas de outros ramos no mercado de comunicação, como, por exemplo, os Provedores de Serviço de Internet (ISPs - Internet Service Providers) através da oferta de serviços de voz sobre IP, tais operadoras viram-se obrigadas a diversificar sua oferta de serviços para gerar novas fontes de receita. Por possuírem ampla infra-estrutura instalada, as operadoras de telecomunicações passaram a oferecer, também, serviço de TV aos usuários, através de suas redes (convergentes) de telefonia e dados já existentes, o chamado IPTV. O objetivo deste trabalho foi possibilitar, neste cenário, que estas empresas consigam oferecer, além dos serviços convencionais de TV (e.g., transmissões lineares dos conteúdos nos canais de TV), serviços diferenciados empregando-se a mesma infra-estrutura. O foco deste trabalho é a oferta do serviço de apresentação deslocada no tempo dos conteúdos transmitidos linearmente nos canais de TV, sem a necessidade de configuração prévia por parte do usuário. Desta maneira, dá-se maior flexibilidade ao usuário, possibilitando-o assistir aos conteúdos que lhe interessam, no horário mais conveniente, sem ter que se preocupar com isso antecipadamente (i.e., sem a necessidade de configurar algum equipamento para gravar o conteúdo ou saber antecipadamente quais programas lhe interessam). Para isso foram pesquisadas e analisadas tanto tecnologias de transmissão e distribuição de conteúdos, como também o paradigma peer-to-peer, muito utilizado atualmente no compartilhamento de arquivos na Internet. A partir daí, foi concebida uma arquitetura capaz de oferecer tanto o serviço tradicional de transmissão linear de TV, quanto de apresentar vídeos deslocados no tempo (i.e., vídeos cuja transmissão linear já foi iniciada ou até concluída, a partir de qualquer posição já transmitida), combinando-se técnicas de multidifusão de dados, armazenamento distribuído e protocolos peer-to-peer. Desta maneira, obteve-se uma solução eficiente, utilizando-se os recursos disponíveis em todo o sistema, incluindo recursos ociosos dos usuários finais, para auxiliar no armazenamento e distribuição dos conteúdos deslocados no tempo. Finalmente, um protótipo foi desenvolvido como prova de conceito da arquitetura proposta neste trabalho, e, juntamente com os testes realizados, comprovam a viabilidade de se utilizar redes P2P para a distribuição dos conteúdos para a apresentação deslocada no tempo. / Telecommunication companies are suffering from the increasing offer of cheap and reliable voice over IP services, being forced to diversify their services looking for new revenue possibilities. Since these companies have a vast infrastructure, they are now providing TV services through the same telephony and data infrastructure, using their IP networks to offer IPTV. The goal of the present work is to allow, in this scenario, that such companies offer, additionally to the traditional TV services (e.g., the linear transmissions of the TV channels), differentiated services through the same infrastructure. The focus of the present work is, therefore, the offering of the time-shift service, allowing users to watch linear transmitted contents, time-shifted, without the need for any in-advance configuration. This approach gives more flexibility to the users, allowing them to choose the most appropriate time to watch some content without having to specify their interests in advance (i.e., without configuring some equipment to record the content or knowing in advance which programs will interest themselves). To achieve this goal, technologies for content transmission and distribution, as well as the peer-to-peer paradigm for file sharing were studied, resulting in the development of an architecture capable of offering the traditional linear transmissions service as well as the possibility of time-shift, combining multicast, distributed caching and peer-to-peer technologies. Accordingly, an efficient solution was envisioned, making use of all available resources in the system, including idle resources in the user equipments, to help in the caching and distribution of the time-shifted contents. Finally, a prototype was developed as a proof-of-concept for the designed architecture, which together with the performed tests, shows the viability of utilizing P2P networks in the distribution of time-shifted contents.

Com o aumento da concorrência sofrido pelas operadoras de telecomunicações frente à entrada de diversas empresas de outros ramos no mercado de comunicação, como, por exemplo, os Provedores de Serviço de Internet (ISPs - Internet Service Providers) através da oferta de serviços de voz sobre IP, tais operadoras viram-se obrigadas a diversificar sua oferta de serviços para gerar novas fontes de receita. Por possuírem ampla infra-estrutura instalada, as operadoras de telecomunicações passaram a oferecer, também, serviço de TV aos usuários, através de suas redes (convergentes) de telefonia e dados já existentes, o chamado IPTV. O objetivo deste trabalho foi possibilitar, neste cenário, que estas empresas consigam oferecer, além dos serviços convencionais de TV (e.g., transmissões lineares dos conteúdos nos canais de TV), serviços diferenciados empregando-se a mesma infra-estrutura. O foco deste trabalho é a oferta do serviço de apresentação deslocada no tempo dos conteúdos transmitidos linearmente nos canais de TV, sem a necessidade de configuração prévia por parte do usuário. Desta maneira, dá-se maior flexibilidade ao usuário, possibilitando-o assistir aos conteúdos que lhe interessam, no horário mais conveniente, sem ter que se preocupar com isso antecipadamente (i.e., sem a necessidade de configurar algum equipamento para gravar o conteúdo ou saber antecipadamente quais programas lhe interessam). Para isso foram pesquisadas e analisadas tanto tecnologias de transmissão e distribuição de conteúdos, como também o paradigma peer-to-peer, muito utilizado atualmente no compartilhamento de arquivos na Internet. A partir daí, foi concebida uma arquitetura capaz de oferecer tanto o serviço tradicional de transmissão linear de TV, quanto de apresentar vídeos deslocados no tempo (i.e., vídeos cuja transmissão linear já foi iniciada ou até concluída, a partir de qualquer posição já transmitida), combinando-se técnicas de multidifusão de dados, armazenamento distribuído e protocolos peer-to-peer. Desta maneira, obteve-se uma solução eficiente, utilizando-se os recursos disponíveis em todo o sistema, incluindo recursos ociosos dos usuários finais, para auxiliar no armazenamento e distribuição dos conteúdos deslocados no tempo. Finalmente, um protótipo foi desenvolvido como prova de conceito da arquitetura proposta neste trabalho, e, juntamente com os testes realizados, comprovam a viabilidade de se utilizar redes P2P para a distribuição dos conteúdos para a apresentação deslocada no tempo. / Telecommunication companies are suffering from the increasing offer of cheap and reliable voice over IP services, being forced to diversify their services looking for new revenue possibilities. Since these companies have a vast infrastructure, they are now providing TV services through the same telephony and data infrastructure, using their IP networks to offer IPTV. The goal of the present work is to allow, in this scenario, that such companies offer, additionally to the traditional TV services (e.g., the linear transmissions of the TV channels), differentiated services through the same infrastructure. The focus of the present work is, therefore, the offering of the time-shift service, allowing users to watch linear transmitted contents, time-shifted, without the need for any in-advance configuration. This approach gives more flexibility to the users, allowing them to choose the most appropriate time to watch some content without having to specify their interests in advance (i.e., without configuring some equipment to record the content or knowing in advance which programs will interest themselves). To achieve this goal, technologies for content transmission and distribution, as well as the peer-to-peer paradigm for file sharing were studied, resulting in the development of an architecture capable of offering the traditional linear transmissions service as well as the possibility of time-shift, combining multicast, distributed caching and peer-to-peer technologies. Accordingly, an efficient solution was envisioned, making use of all available resources in the system, including idle resources in the user equipments, to help in the caching and distribution of the time-shifted contents. Finally, a prototype was developed as a proof-of-concept for the designed architecture, which together with the performed tests, shows the viability of utilizing P2P networks in the distribution of time-shifted contents.

De nos jours, l’expérience de l'utilisateur appelé en anglais « User Experience » est devenue l’un des indicateurs les plus pertinents pour les fournisseurs de services ainsi que pour les opérateurs de télécommunication pour analyser le fonctionnement de bout en bout de leurs systèmes (du terminal client, en passant par le réseaux jusqu’à l’infrastructure des services etc.). De plus, afin d’entretenir leur part de marché et rester compétitif, les différents opérateurs de télécommunication et les fournisseurs de services doivent constamment conserver et accroître le nombre de souscription des clients. Pour répondre à ces exigences, ils doivent disposer de solutions efficaces de monitoring et d’estimation de la qualité d'expérience (QoE) afin d’évaluer la satisfaction de leur clients. Cependant, la QoE est une mesure qui reste subjective et son évaluation est coûteuse et fastidieuse car elle nécessite une forte participation humaine (appelé panel de d’évaluation). Par conséquent, la conception d’un outil qui peut mesurer objectivement cette qualité d'expérience avec une précision raisonnable et en temps réel est devenue un besoin primordial qui constitue un challenge intéressant à résoudre. Comme une première contribution, nous avons analysé l'impact du comportement d’un réseau sur la qualité des services de vidéo à la demande (VOD). Nous avons également proposé un outil d'estimation objective de la QoE qui utilise le système expert basé sur la logique floue pour évaluer la QoE à partir des paramètres de qualité de service de la couche réseau. Dans une deuxième contribution, nous avons analysé l'impact des paramètres QoS de couche MAC sur les services de VoD dans le cadre des réseaux sans fil IEEE 802.11n. Nous avons également proposé un outil d'estimation objective de la QoE qui utilise le réseau aléatoire de neurones pour estimer la QoE dans la perspective de la couche MAC. Pour notre troisième contribution, nous avons analysé l'effet de différents scénarios d'adaptation sur la QoE dans le cadre du streaming adaptatif au débit. Nous avons également développé une plate-Forme Web de test subjectif qui peut être facilement intégré dans une plate-Forme de crowd-Sourcing pour effectuer des tests subjectifs. Finalement, pour notre quatrième contribution, nous avons analysé l'impact des différents paramètres de qualité de service Web sur leur QoE. Nous avons également proposé un algorithme d'apprentissage automatique i.e. un système expert hybride rugueux basé sur la logique floue pour estimer objectivement la QoE des Web services / Today user experience is becoming a reliable indicator for service providers and telecommunication operators to convey overall end to end system functioning. Moreover, to compete for a prominent market share, different network operators and service providers should retain and increase the customers’ subscription. To fulfil these requirements they require an efficient Quality of Experience (QoE) monitoring and estimation. However, QoE is a subjective metric and its evaluation is expensive and time consuming since it requires human participation. Therefore, there is a need for an objective tool that can measure the QoE objectively with reasonable accuracy in real-Time. As a first contribution, we analyzed the impact of network conditions on Video on Demand (VoD) services. We also proposed an objective QoE estimation tool that uses fuzzy expert system to estimate QoE from network layer QoS parameters. As a second contribution, we analyzed the impact of MAC layer QoS parameters on VoD services over IEEE 802.11n wireless networks. We also proposed an objective QoE estimation tool that uses random neural network to estimate QoE from the MAC layer perspective. As our third contribution, we analyzed the effect of different adaption scenarios on QoE of adaptive bit rate streaming. We also developed a web based subjective test platform that can be easily integrated in a crowdsourcing platform for performing subjective tests. As our fourth contribution, we analyzed the impact of different web QoS parameters on web service QoE. We also proposed a novel machine learning algorithm i.e. fuzzy rough hybrid expert system for estimating web service QoE objectively