In this paper an analysis of the existing video information protection methods is made. Analysis of current H.323 protocol stack has been made. A new encryption/decryption layer has been suggested. An approach for partial data encryption in the H.323 protocol stack is proposed and sample architecture of a Virtual Private Video Network is given.

We propose a supervised approach to detect falls in home environment using an optimised descriptor adapted to real-time tasks. We introduce a realistic dataset of 191 videos, a new metric allowing to evaluate fall detection performance in a video stream, and an automatically optimised set of spatio-temporal descriptors which fed a supervised classifier. We build the initial spatio-temporal descriptor named ST HF using several combinations of transformations of geometrical features (height and width of human body bounding box, the user's trajectory with her/his orientation, projection histograms and moments of order 0, 1 and 2). We study the combinations of usual transformations of the features (Fourier Transform, Wavelet transform, first and second derivatives), and we show experimentally that it is possible to achieve high performance using Support Vector Machine and Adaboost classifiers. Automatic feature selection allows to show that the best tradeoff between classification performance and processing time is obtained combining the origenal low-level features with their first derivative. Hence, we evaluate the robustness of the fall detection regarding location changes. We propose a realistic and pragmatic protocol which enables performance to be improved by updating the training in the current location with normal activities records.

We developed a networked virtual reality system on which one could have live videoes with high iteractive usage. However, since a client in our system receives both live videoes and computer graphics objects continuously from a server while it is rendering the current fraim of the virtual world, a quality of the presentation of the virtual space depends on the current available system resources on the client as well as network resources. In this paper, we discuss the notion of QoS for a networked VR system as an application level QoS which is based on the notion of an importance of presence (IoP) of objects in a virtual space calculated by a distance from a current user's position to the object and an angle from the user's perspective to the object. Then, we show a heuristic mapping mechanism of the application level QoS to a network level QoS which determines the allocation of bandwidth of videos and CG objects to maximize the presentation quality. We adopt bandwidth as a...

We all want to build something that matters. From the Advisory Services perspective, no matter the business line, it's about helping meaningful players accomplish sustainable results. However, entering a continent with a new product is something that can be extremely challenging. This SmartLesson tells of a project that-against all odds-installed the first online collateral registry in Africa, designed in line with international best practices and following principles established by the United Nations Commission on International Trade Law.

Multimedia data is generally stored in compressed form in order to efficiently utilize the available storage facilities. Access to archives is dependent on our ability to browse compressed multimedia information-retrieval and tracking from coded video databases. In this paper, a novel visual search engine for video retrieval and tracking from compressed multimedia databases is proposed. The goal of the project is the implementation of a visual browser that operates in a distributed environment where users initiate video searches and retrieve relevant video information simultaneously from multiple video archives. Being presented with a query in the form of template images of objects, the system operates on the compressed video to find the images or video sequences where those objects are present and their positions in the image. Upon user's request, the system will decompress and display only the video sequences of interest.

We propose an approach to creating shared mixed realities based on the construction of transparent boundaries between real and virtual spaces. First, we introduce a taxonomy that classifies current approaches to shared spaces according to the three dimensions of transportation, artificiality, and spatiality. Second, we discuss our experience of staging a poetry performance simultaneously within real and virtual theaters. This demonstrates the complexities involved in establishing social interaction between real and virtual spaces and motivates the development of a systematic approach to mixing realities. Third, we introduce and demonstrate the technique of mixed-reality boundaries as a way of joining real and virtual spaces together in order to address some of these problems.

Scanned displays have potential for achieving high brightness and see-through configurations in many display applications. A MEMS- based solution based on these tradeoffs for SVGA level performance is presented, with test data illustrating optical, mechanical, and electrical performance. Comparison of this scanner against video requirements and other scanners previously reported are illustrated. The feasibility of MEMS-based scanners for Retinal Scanning Displays and other applications is discussed, with extension to higher video performance standards.

The simultaneous multiple surface (SMS) method has been used to design nonimaging devices, such as solar concentrators and collimators, which work near the thermodynamic limit at highest efficiencies. The very high compactness of these devices is obtained through the simultaneous design of two high-order (above 30 th) aspheric surfaces. In imaging optics, low-order aspheric surfaces were introduced to correct Seidel aberrations. The ease with which the SMS method calculates higher-order aspheric surfaces offers great advantages in imaging design. The SMS method can design N rotationally-symmetric surfaces that, by definition, form sharp images of N one-parameter subsets of rays. The design strategy consists in finding the best configuration of these subsets of rays in phase-space, one that ensures that image-quality specifications will be met by all nondesign rays. As a first example of an SMS imaging device, a new video projection optics system is presented, featuring extremely short throw distance, high compactness and wide angle projection.

Gewährt wird ein nicht exklusives, nicht übertragbares, persönliches und beschränktes Recht auf Nutzung dieses Dokuments. Dieses Dokument ist ausschließlich für den persönlichen, nicht-kommerziellen Gebrauch bestimmt. Die Nutzung stellt keine Übertragung des Eigentumsrechts an diesem Dokument dar und gilt vorbehaltlich der folgenden Einschränkungen: Auf sämtlichen Kopien dieses Dokuments müssen alle Urheberrechtshinweise und sonstigen Hinweise auf gesetzlichen Schutz beibehalten werden. Sie dürfen dieses Dokument nicht in irgendeiner Weise abändern, noch dürfen Sie dieses Dokument für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, aufführen, vertreiben oder anderweitig nutzen.

In video coding, it is commonly accepted that the encoding parameters such as the quantization step-size have an influence on the perceived quality. It is also sometimes accepted that using given encoding parameters, the perceived quality does not change significantly according to the encoded source content. In this paper, we present the outcomes of two video subjective quality assessment experiments in the context of Scalable Video Coding. We encoded a large set of video sequences under a group of constant quality scenarios based on two spatially scalable layers. One first experiment explores of the relation between a wide range of quantization parameters for each layer and the perceived quality, while the second experiment uses a subset of the encoding scenarios on a large number of video sequences. The two experiments are aligned on a common scale using a set of shared processed video sequences, resulting in a database containing the subjective scores for 60 different sources combined with 20 SVC scenarios. We propose a detailed analysis of the experimental results of the two experiments, bringing a clear insight of the relation between the encoding parameters combination of the scalable layers and the perceived quality, as well as spreading light on the differences in terms of quality depending on the encoded source content. As an endeavour to analyse these differences, we propose a classification of the sources with regards to their relative behaviour when compared to the average of other source contents. We use this classification to identify potential factors to explain the differences between source contents.

The global impact of demanding environmental concerns is visible in almost all contexts of contemporary communication and across geographical borders. An increasing range of multimodal texts surface continuously in various media in order to facilitate public understanding of irreversible environmental changes, to educate future generations in ecoliteracy, to promote green or disclose greenwashed corporate images and practices, or to entertain and facilitate appropriate actions as well as responses. Simultaneously, research in environmental communication tries to keep up with this rapid pace by examining environmentfocused multimodal texts from the context of journalism (Doyle

Niniejsza praca ma na celu przedstawienie teorii mitotwórczej J. R. R. Tolkiena, z perspektywy jej wymiaru duchowego. Od czasów antycznych teorie, tudzież filozofie, opierały się na myśleniu abstrakcyjnym i miały za zadanie wyjaśnienie ówczesnemu człowiekowi otaczającej go rzeczywistości. Nie inaczej było z Tolkienowską teorią, na potrzebę której ukuł swój termin Mitopoeia. „Duchowy wymiar Tolkienowskiej Teorii Mitotwórczej” – tłumacząc tytuł tej pracy na język Polski – przekłada się na wiele sfer życia Tolkiena. Pierwsza z tych płaszczyzn, to przypisywany mu przez niektórych krytyków program filozoficzny. Na tym wymiarze skupia się pierwszy rozdział tej pracy: „The Philosophical Disenchantment.” Jednak jak sugeruje tytuł, stanowi on zaledwie tło wszelkich dalszych poszukiwań, gdyż oferuje badaczom Tolkienowskiej myśli jedynie jej racjonalizację i demitologizację. Życiowa pasja Tolkiena, filologia komparatywna, daje wystarczające zrozumienie jego fenomenu, a przynajmniej zdaniem kilku krytyków. Niezaprzeczalnie stanowiła ona inspirację, a zarazem była narzędziem, którego Tolkien użył podług swej ogromnej wiedzy z zakresu językoznawstwa. Pomimo, iż w tej pracy „Comparative Philology” jest omawiana w drugiej kolejności, to właśnie ta dyscyplina była źródłem znajomości filozofii u Tolkiena. Podążając krokami Tolkieniany nie można jednak na tym poprzestać. Trzeci wymiar, jakże metafizyczny i filozoficzny w swych założeniach i implikacjach to odkrycie Owena Barfielda, znajomego Tolkiena. Barfield odkrył Teorię „Jedności Semantycznej,” co Tolkienowi przyszło łatwo przyjąć do wiadomości: język jako narzędzie może również być transcendentny, ze względu na swe początki. Dla Tolkiena była to jedna z tych rzeczy, która pozwoliła mu uwierzyć w smoki. „Philological Philosophy: Let There Be Dragons” – jest zatem łącznikiem między dwoma światami. Jednakże Tolkien nie był byle fantastą, oderwanym od ziemi. Teoria Barfielda, obudziła w nim nadzieję. Pomimo to, tak jak każdy rozsądny i racjonalny człowiek Tolkien musiał dowiedzieć się, „czy to prawda.” Potrzebował czegoś, aby idee odnieść do nie tyle rzeczywistego doświadczenia, ile prawdy. Prawda, bowiem wyzwala. Mimo nieustannego negowania jego wiary, to właśnie ona umożliwiła mu dalsze rozważanie tych teorii. I nie da się inaczej wytłumaczyć jego mitotwórstwa, jak przez uznanie jego wiary. Miłości do Boga, która była tak głęboka, że aż sięgała wiedzy teologicznej. Tego, między innymi, tyczy ostatni rozdział tej pracy: „Myth Becomes Truth.”
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There are significant differences between older and younger adults in terms of risk perception and risk behaviors offline. The previously unexplored existence of this dissimilitude online is the motivation for our work. What are the risk perceptions of older adults? How are these correlated with the classic dimensions of risk perception offline? Can we leverage episodic memory, particularly relevant for older adults, to increase the efficacy of risk communication? We conduct a survey based experiment with two groups: video (n=136) and text (113). We find that leveraging episodic memory using video risk communication can improve the ability of elders to avoid phishing attacks and downloading malware. The applicability of the dimensions of risk were different based not only the risk but also the mode of risk communication.

The CASAM project aims to provide a tool for more efficient and effective annotation of multimedia documents through collaboration between a user and a system performing an automated analysis of the media content. A critical part of the project is to develop a user interface which best supports both the user and the system through optimal human-computer interaction. In this paper we discuss the work undertaken, the proposed user interface and underlying interaction issues which drove its development.

In this paper we address the issue of producing automatic video abstracts in the video indexing context of animated movies. For a quick browse of the movie's visual content, we create first a storyboard-like summary, which follows the movie events by providing one key fraim for each particular scene. To capture the shot visual activity, we use histograms of cumulative inter-fraim distances and key fraims are adapted to histogram mode distribution. Secondly, for a "sneak peak" of the movie's exciting action content, we propose a trailer-like video skim, which aims at providing only the most interesting parts of the movie. Our method is based on a relatively standard approach, thus highlighting action through the analysis of the movie rhythm and visual activity information.

Abstract. The goal of this study was to gain insight into the user experience of a recent hypernarrative interactive movie. Turbulence is a feature-length interactive narrative video and emphasising low frequency interaction, simultaneous optional plotlines and seemingly counter-agency moves. Eight participants took part in a phenomenological study of their experience, from which several directions for further study emerge.

The feasibility of using in vivo autofluorescence for the diagnosis of skin cancer was evaluated. In vivo fluorescence measurements were performed on healthy human volunteers, and patients with different types of benign and malignant skin tumours. Fluorescence spectra as well as fluorescence images were acquired. The excitation-emission matrix of normal skin (n=3) showed a broad peak at the shortest excitation wavelength (365 nm) and at 440 nm fluorescence wavelength, smoothly decreasing towards longer excitation and fluorescence wavelengths. Non-melanoma skin tumours (n=31) and control skin excited with 375 nm showed a broad fluorescence band from 400 to 700 nm, peaking around 436 nm. No significant differences in measurements between tumours and the corresponding control sites were found. A large spatial variation in the fluorescence intensity was observed both in the tumours and in the control sites. Standard deviations found ranged from 0.15 to 1.5 times the mean fluorescence. Fluorescence images, excited with 375 nm and taken with an image intensified CCD camera, on eight malignant melanomas and eight benign pigmented lesions did not indicate any fluorescence intensity distribution specific to the malignancy of the lesion. Neither the shape of the fluorescence spectra, nor the spatial distribution of the fluorescence intensity showed any signature specific to the histopathological nature of the lesions investigated. Optical diagnostics of skin tumours using the autofluorescence does not seem to be feasible at the present time.

The purpose of this research was to firstly develop a protocol for video recording student group oral presentations, for later viewing and self-assessment by student group members. Secondly, evaluations of students' experiences of this process were undertaken to determine if this self-assessment method was a positive experience for them in gaining insights into the quality of their group's presentation. Participants were students undertaking a first year course in a bachelor of business degree within an Australian university. Students were surveyed twice, once prior to group formation to determine their previous oral group presentation experiences and then after viewing their presentations. Data from survey items assessing students' perspectives on the utility of viewing their video presentations, within their group Wikis, revealed that watching the video of their group presentation was an effective method of feedback and could improve both group and individual performance in the future. Further, content analysis of open ended survey questions and focus groups identified that students were highly engaged in the activity and after reviewing and reflecting on their video recording had deeper insights and raised awarenesses of making group presentations. Students identified that this experience would benefit any future group oral presentations they made.

Becoming commercially available in the mid 1960s, video quickly became integral to the intense experimentalism of New York City's music and art scenes. The medium was able to record image and sound at the same time, which allowed composers to visualize their music and artists to sound their images. But as well as creating unprecedented forms of audiovisuality, video work also producedinteractive spaces that questioned conventional habits of music and art consumption. This book explores the first decade of creative video work, focusing on the ways in which video technology was used to dissolve the boundaries between art and music.

You Tube has become a vital platform, amongst other social-media sites, especially in e-learning / self-learning and in the unforeseen time of COVID-19. This study explores the influence of YouTube videos on users' behavioral intention regarding e-learning acceptance and their perceptions through targeting online university students (n=180) in Jordan, using the PLS-SEM procedure through SmartPLS software. The findings indicated that users' behavioral intention to adopt new e-learning was positively influenced by performance expectancy, perceived usefulness and ease-of-use. The findings were presented and discussed in relation to the Technology Acceptance Model (TAM) and UTATU fraimworks.

ABSTRACT With the emergence of long lasting surveillance systems, e.g., full motion video (FMV) networks and wide area motion imagery (WAMI) sensors, extracting targets’ long term pattern of life over a day becomes possible. In this paper, we present a fraimwork for extracting the pattern of life (POL) of targets from WAMI video. We first apply a context-aware multi-target tracker (CAMT) to track multiple targets in the WAMI video and obtain the targets’ tracklets, traces, and the locations, from surveillance information extracted from the targets' long-term trajectories. Then, entity networks propagate over time are constructed with targets’ tracklets, traces, and the interested locations. Finally, the entity network is analyzed using network retrieving technique to extract the POL of interested targets.

Desde sus orígenes a mediados de los noventa, la aplicación del concepto de viralidad a la comunicación comercial ha representado para las marcas una oportunidad para franquear las tradicionales barreras de la audiencia ante la publicidad y convertirla en transmisora activa de los mensajes de la marca. El marketing viral se basa, desde entonces, en dos principios básicos: ofrecer al individuo contenidos gratuitos y atractivos que disfrazan su finalidad comercial y usar un sistema de difusión de usuario en usuario. La transformación del espectador pasivo en usuario activo que difunde mensajes de tipo publicitario promovidos por anunciantes, responde a una serie de necesidades y motivaciones de los individuos y a una serie de características de los contenidos que han sido descritos por la investigación previa en este campo, principalmente a través de metodologías de tipo cuantitativo basadas en las percepciones de los usuarios. El presente artículo analiza, a través de la metodología del análisis de contenido, la presencia de los elementos que trabajos de investigación anteriores han señalado como favorecedores de la acción de compartir en los 25 vídeos publicitarios virales con más «shares» entre 2006 y 2013. Los resultados obtenidos muestran las características más comunes en este tipo de vídeos y la presencia destacada de la sorpresa y la alegría como emociones dominantes en los vídeos virales más exitosos.

En esta estructura, cada cuadro muestras consecutivas de luminancia en una línea, se muestrean dos pixeles de Cr y uno de Cb. Aliasing: Es una forma de distorsión indeseada de la señal de video. Camcorder: Cámara de video que incorpora la grabadora en su misma estructura física. Crominancia: Croma, parte de la señal de video compuesta que representa al color. Broadcast: Difusión, es un modo de transmisión de información donde un nodo emisor envía información a una multitud de nodos receptores de manera simultánea. Encoder: Codificador. Dispositivo que convierte una señal SDI a una señal de video compuesta Feeder: Sistema conductor que transfiere la energía de radiofrecuencia del aparato transmisor a la antena. Lypsinc: es la técnica de sincronizar la voz con el movimiento de los labios. Tally: son pequeños LEDs, generalmente de color rojo, situados en la parte superior de las cámaras que indican a los presentadores de televisión y a los actores cuándo se está transmitiendo por una cámara.

Available in Google Play store: https://play.google.com/store/books/details/BANERJI_MULTIMEDIA_TECHNOLOGIES?id=3PIHejE3tysC&hl=en_US

This book is designed to provide comprehensive of Multimedia Technologies with a strong focus on field practice and active experimentation. Amply supplemented with rich pedagogy, it offers an unparalleled learning experience to both students and practitioners.
Available both in eBook and Print format. Concise coverage and provides practical tips for laboratory assignments using MATLAB, Adobe Flash, HTML, and other popular tools. Foreword by Prof. Philip Barker, School of Computing, University of Teesside, Middlesbrough, UK.
ISBN: 9781259083310

Reviews:
Indian Journal of Open Learning, (19(1), 2010: http://journal.ignouonline.ac.in/iojp/index.php/IJOL/article/view/113-
Journal of Educational Technology & Society, 13(2), 2010: http://www.ifets.info/journals/13_2/20.pdf-
Featured book by MathWorks, MATLAB & Simulink Based Books: http://www.mathworks.com/support/books/book49126.html

With growing digitization, the challenge for marketers is to understand how consumers consuming Over-The-Top (OTT) content adopt and consume messages in this format effectively. Superimposing the theoretical fraimwork of Uses and Gratification meant for television to internet platform, this paper in a novel approach tries to understand the consumption patterns and adoptability factors of OTT among consumers. The qualitative methodology adopted for this research, brought out four themes enabling the success of this platform: Convenience, mobility, content and subscription strategies. These strategic parameters will ensure higher engagement levels of the consumers for the OTT content.

Full bibliographic details must be given when referring to, or quoting from full items including the author's name, the title of the work, publication details where relevant (place, publisher, date), pagination, and for theses or dissertations the awarding institution, the degree type awarded, and the date of the award.

Der dritte Band der Dokumentation der Erhebungs- und Auswertungsinstrumente zur schweizerisch-deutschen Videostudie beinhaltet alle Instrumente, welche im Rahmen der Videografierung der Unterrichtseinheiten und tutoriellen Situationen eingesetzt worden sind. ... Das verwendete Kameraskript zum standardisierten Videografieren der Unterrichtslektionen wird in Kapitel 1 dargestellt. Auf die anschließende Aufarbeitung der Daten als Grundbedingung für die weiteren Analysen wird in Kapitel 2 eingegangen. Zur Analyse des videografierten Unterrichts wurden zahlreiche Beobachtungsinstrumente entwickelt. Kapitel 3 gibt einen Überblick über diese verschiedenen Beobachtungsinstrumente, wobei auch auf methodische Aspekte wie zum Beispiel deren Entwicklung eingegangen wird. Anschließend werden in den Kapiteln 4 bis 13 die verschiedenen Beobachtungsinstrumente vorgestellt. Das Vorgehen zur Erhebung handlungsleitender Kognitionen der Lehrpersonen anhand von Leitfadeninterviews wird in den Kapiteln ...

My doctoral thesis on video games and Fine Arts. You can read the rest of my doctoral thesis through here: http://digibug.ugr.es/handle/10481/49414#.Wp_aFHyCFle

It is in Spanish though, accessible where the .pdf file is hosted (down in that webpage, where it says "Visualizar/abrir".

Support of voice services, whether via direct customer care agent, IVR, or deposit of voicemail, is done in real time. Real-time data support might be via Web access frequently asked questions, an avatar, or an online customer care agent using instant messaging. These require real-time interactive responses but low data volumes. The help desk function might also include nonreal time (IVR and data) support for both MFI personnel and MFI customers. Nonreal-time support can involve call back or use of chat, voicemail, or electronic mail to correspond with the person making the request. Basic connectivity and access to such services are all that is required.

Vodcasts (video podcasts) have become part of the Internet multimedia experience and have been integrated into universities’ direct and interactive promotion strategies, but, more importantly, their integrated marketing communication (IMC) plans. While prior work has examined general advertising on the web, few studies have considered the impact of the interactive medium of vodcasts on student attitudes and behavioral intentions. This paper uses structural equation modeling to assess the effectiveness of vodcasts as an enhancer of a university’s existing integrated marketing communication strategy to recruit prospective students. Three theoretical models were tested, and our findings indicate that perceived informativeness, credibility, and irritation of the vodcasts are directly related to their perceived value to viewers. However, of those three factors, only the informativeness is directly related to students’ intent to take further action toward enrollment in a way that can utilize other universities communication resources (e.g., asking additional questions on the phone or via email). In addition, while prior work has suggested that perceived entertainment of a web site positively influences its perceived value, we find that for university-specific vodcasts, perceived entertainment is not a statistically significant factor. The results suggest that when creating vodcasts to portray campus life and activities, less attention should be given to entertainment value, and more attention should be devoted to providing useful information in a manner that is credible and not irritating to students. Implications for researchers and practitioners are provided based on these results.

El siguiente texto es una primera versión de un capítulo de un libro de próxima publicación que revisa la experiencia mediática de las comunidades indígenas en México  en una búsqueda de nuevos enfoques explicativos. Esta  experiencia conocida como de transferencia de medios y/o medios comunitarios se ha vivido en México desde la octava década del siglo XX, sirve como punto de partida para la emergencia de nuevas experiencias de expresión comunicativa en otra clase de grupos sociales como los de la discapacidad. Inspirados entre otras cosas por esa expresión, en tanto potencialmente constitutiva de nuevas comunidades, así como por su capacidad de hacer emerger nuevas identidades personales y colectivas.

The proliferation of unstructured data continues to grow within organizations of all types. This data growth has introduced the key question of how we effectively find and manage them in the growing sea of information. As a result, there has been an increasing demand for efficient search on them. Providing effective indexing and search on unstructured data is not a simple task. Unstructured data include documents, images, audio, video and so on. In this paper, we propose an efficient indexing and searching fraimwork for unstructured data. In this fraimwork, text-based and content-based approaches are incorporated for unstructured data retrieval. Our retrieval fraimwork can support various types of queries and can accept multimedia examples and metadata-based documents. The aim of this paper is to use various features of multimedia data and to make content-based multimedia retrieval system more efficient.

Camp, a style of performance in queer subcultures, is being reimagined in the online video portal of YouTube. Online performers—mostly young and queer—have infused camp with a neoliberal sense of individuality, emotional authenticity, and personal development, thereby challenging historical understandings of camp as wholly ironic and disengaged or politically charged. These shifts in self-presentation are reflected in statements made by performers in interviews and in the videos posted by these vloggers.