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2011 2nd International Conference on Wireless Communication, vehicular Technology, Information Theory and Aerospace and Electronic systems Technology, Wireless vITAE 2011

作者： Dhanapal, Karthikeyan Balaji Somasundara, Arun Agrahara Paul, Sanjoy Infosys Technologies Limited 44 Electronics City Bangalore 560100 India

ISBN: (纸本)9781457707872

There is lot of personal multimedia content (audio, image, video) being generated due to the ease of generating such content with the everyday devices, such as, mobile phones and also due to the plummeting cost of media-generating devices, such as, digital cameras which have made them ubiquitously available. Almost everyone wants to share his/her personal content with family and friends. In addition to this sharing, there needs to be proper mechanism of accessing this content by technically non-savvy people. This is more so a requirement for the masses in an emerging economy like India where broadband access is almost non-existent, and for the elderly people everywhere, who use Tv as their main device for accessing media. We present a system, which sits in the Internet cloud, simplifies content upload and organization, and allows seamless sharing and access of the multimedia content across networks and devices. Most importantly, the content can be accessed from any one of the 3 types of screens: web/PC, mobile, Tv. The system hides all the complexity of the storage, formatting, and organization of the media content from the users. Performance evaluation of the system shows that it is robust against variations of bandwidth, delay and jitter in a mobile wireless network and is reasonably scalable with the increase in the number of users. © 2011 IEEE.

关键词： Digital devices

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Multimodal multi-device program guide for smart conferences 11

Multimodal multi-device program guide for smart conferences

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13th International Conference on Human-Computer Interaction with mobile devices and Services, mobile HCI 2011

作者： Turunen, Markku Hella, Juho Miettinen, Toni valkama, Pellervo Hakulinen, Jaakko Raisamo, Roope Tampere Unit for Computer Human-Interaction School of Information Sciences University of Tampere 33014 Tampere Finland

ISBN: (纸本)9781450305419

We demonstrate a multimodal, multi-user, and multi-device conference program guide for conference participants. Its functionality includes access to the conference program with additional multimedia content, voting, feedback, and communication with the other participants. People can interact with the system in a multimodal way using spoken language, gestures and haptic feedback with mobile phones and shared public displays. © 2011 Authors.

关键词： multimedia systems

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Personal virtual multimedia library (PvML) in a converged network

Personal virtual multimedia library (PVML) in a converged ne...

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International Conference on Wireless Communication, vehicular Technology, Information Theory and Aerospace and Electronic systems Technology (Wireless vITAE)

作者： Karthikeyan Balaji Dhanapal Arun Agrahara Somasundara Sanjoy Paul Software Engineering & Technology Laboratories (SETLaboratories) Infosys Technologies Limited Bangalore India

关键词： mobile handsets Tv mobile communication multimedia communication Streaming media Power cables IEEE 802.11 Standards

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Performance evaluation of H.264/SvC video streaming over mobile WiMAX

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COMPUTER NETWORKS 2011年第15期55卷 3578-3591页

作者： Migliorini, Daniele Mingozzi, Enzo vallati, Carlo Univ Pisa Dip Ingn Informaz I-56122 Pisa Italy

mobile broadband wireless networks, such as mobile WiMAX, have been designed to support several features like, e.g., Quality of Service (QoS) or enhanced data protection mechanisms, in order to provide true access to real-time multimedia applications like voice over IP or video on Demand. On the other hand, recently defined video coding schemes, like H.264 scalable video coding (H.264/SvC), are evolving in order to better adapt to such mobile environments with heterogeneous clients and time-varying available capacity. in this work we assess the performance of H.264/SvC video streaming over mobile WiMAX under realistic network conditions. To this aim, we make use of specific metrics, like PSNR (Peak Signal to Noise Ratio) or MOS (Mean Opinion Score), which are related to the quality of experience as perceived by the end user. Simulation results show that the performance is sensitive to the different available H.264/SvC encoding options, which respond differently to the loss of data in the network. On the other hand, if aggressive error recovery based on WiMAX data protection mechanisms is used, this might lead to unacceptable latencies in the video play out, especially for those mobiles with poor wireless channel characteristics. (C) 2011 Elsevier B.v. All rights reserved.

关键词： IEEE 802.16 WiMAX H.264/SvC Scalable video coding Performance evaluation

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Diversity decay in opportunistic content sharing systems

Diversity decay in opportunistic content sharing systems

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IEEE International Symposium on World of Wireless mobile and multimedia Networks (WoWMoM)

作者： Liam McNamara Salvatore Scellato Cecilia Mascolo Computer Laboratory University of Cambridge UK

As content that users access on their mobile devices becomes bulkier, opportunistic networking is becoming a potential complement to centralised and infrastructure based downloads. We study how users share items of mutual interest with each other with a simple model based on a `networked urn process'. We investigate the effect of different content sharing policies upon a multi-category set of items. We find that the process of sharing mutual interests inherently disproportionately reinforces category replication disparity, i.e., the most popular categories become proportionally even more numerous. These findings uncover a major hurdle in the creation of automatic opportunistic file sharing between users. Even if users altruistically sacrifice battery power and network resources to share content not relevant to them, overall, the system may not be able to fairly distribute items that belong to niche categories.

关键词： Color Libraries Image color analysis Laboratories Data models Computers Simulation

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mobile learning through microblogging

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Procedia - Social and Behavioral Sciences 2011年 15卷 4-8页

作者： Carmen Holotescu Gabriela Grosseck Politechnica University 2 Bd. V. Parvan 300222 Timisoara Romania West University of Timisoara 4 Bd. V. Parvan 300223 Timisoara Romania

In the context in which the new frontier of Web 2.0 is marked out by the use of mobile devices anywhere, anytime, by anyone and anything, our paper aims at valorizing the mobility parameters of the *** platform in order to integrate the microblogging technology in higher education, for the purpose of increasing knowledge and learning in authentic mobile learning environments. As an innovation for the mobile learning through microblogging, we mention the following elements: ● on a technological level: localize / join mobile groups, access content and OERs, share opinions, work collaboratively on multimedia objects, participate in polls / quizzes, receive / send updates via SMS, create / manage mobile PLEs, recover password via SMS; ● on a pedagogical level: develop multimedia educational resources / learning objects by using mobile technologies specific for different subject areas to be teached with microblogging. Thus, the aim of our experiment is not only to provide a general overview / a framework for using microblogging through mobile technologies, but also a way to enhance teaching and learning in formal university courses and to present mobile microblogging learning benefits, opportunities, limits and risks.

关键词： Microblogging mobile learning Higher education

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Seamless annotation and enrichment of mobile captured video streams in real-time

Seamless annotation and enrichment of mobile captured video ...

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IEEE International Conference on multimedia and Expo (ICME)

作者： Motaz El-Saban Xin-Jing Wang Noran Hasan Mahmoud Bassiouny Mahmoud Refaat Cairo Microsoft Innovation Lab Egypt Microsoft Research Asia China Cairo Microsoft Innovation Lab Cairo Egypt Computer and Systems Engineering Department Faculty of Engineering Alexandria University Egypt

mobile phones are becoming more and more ubiquitous with a large number of these devices having image/video capturing capabilities, connection capabilities and built-in rich sensory. This has encouraged the common user to capture more image/video content than ever before. However, this has created two interrelated problems: 1) while capturing some scene the user may want to get more information about it to make a decision (e.g. a buying one) without painful textual input on these mobile devices and while accounting for multiple meanings associated with a single image, as an image is worth a thousand words and 2) videos captured cannot be easily searched afterwards and hence forgotten due to the lack of proper indexing techniques. In this paper, we are presenting a system addressing the above two problems through a single solution by providing users with real-time automatically generated tags of their currently captured videos. The user can select/deselect from the automatic tags, thus tags can serve as visual query suggestions helping bridging the user's query intent. This same set of tags will be stored with the video for enabling easy content access afterwards.

关键词： Eye protection mobile communication Streaming media

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content-Based Image Compression for Arbitrary-Resolution Display devices

Content-Based Image Compression for Arbitrary-Resolution Dis...

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IEEE International Conference on Communications Workshops

作者： Chenwei Deng Weisi Lin Jianfei Cai Sch. of Comput. Eng. (SCE) Nanyang Technol. Univ. Singapore Singapore

ISBN: (纸本)9781612842325

The work presented in this paper addresses the increasing demand of visual signal delivery to terminals with arbitrary resolutions (like in mobile multimedia communication and cloud computing) for universal access and presentation, without extra computational burden to the receiving end. Scalable image compression and transmission are essential, and to be effective and meaningful, it has to be content-based. The existing coding methods cannot support content-based spatial scalability with high compression. In this paper, the principle of seam carving (SC) is incorporated into a wavelet codec. After multi-level discrete wavelet transform (DWT), SC is performed in the low frequency subband. Different from the conventional wavelet-based coding schemes, DWT coefficients here are encoded and transmitted according to the energy map of resultant seams. At the decoder side, the end user has the ultimate choice for the scalability without the need to examine the visual content;an image with arbitrary aspect ratio can be reconstructed in a content-aware manner based upon the encoded information. Simulation results show that the resized images preserve important content while achieving high coding efficiency in transmission.

关键词： Image compression content-aware Spatial-scalability Discrete wavelet transform (DWT) Seam carving (SC) SPIHT

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Ethnic Immigrant Minorities and mobile Learning for Schools -- A Class without Walls: A New Didactic Approach to Digital Literacy across the Curriculum

Ethnic Immigrant Minorities and Mobile Learning for Schools ...

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International Conference on Intelligent Networking and Collaborative systems (INCOS)

作者： Konstantinos Kalemis Training Institute of National Centre for Public Administration & Local Government Athens Greece

Much like immigrants who leave the cultural comfort of their home societies and move to places with very different cultures and social practices, those who teach online leave the familiarity of the face-to-face classroom for the uncharted terrain of the online environment, whose constraints and affordances often lead to very different practices. The trans-classroom teacher who moves between the two environments, transferring ideas, strategies, and practices from one to the other, is a mental migrant. The transformations -- of the teacher and of the course -- that occur in these migrations and the two-way interactions between face-to-face and online teaching are the focus of this study. As teachers adapt their courses for the online environment, they are forced to re-examine the course design, reconsider curriculum strategies, and make many decisions about what to take out and what to keep, what to add and what to substitute. The implication for faculty who would like to implement mobile learning in their online or traditional courses is that they can begin by making content and information available to students in formats easily accessible by mobile phone or laptop computer. This would be a logical first step, since a majority of students and faculty already use these tools in many of their daily activities. Other tools, such as video iPods and MP3 players, can be phased in gradually. The following ideas could be implemented immediately with little to no additional cost. Most basic cell phones today can send and receive text messages, voice mail, and e-mail. E-mail is a convenient way to communicate information to the learning community, so the instructor can begin by sending class-wide "broadcast" e-mails that students can access via a variety of mobile devices.

关键词： mobile communication Portable computers Educational institutions mobile handsets multimedia communication

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CBIR for Image-Based Language Learning within mobile Environment

CBIR for Image-Based Language Learning within Mobile Environ...

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52nd IEEE International Midwest Symposium on Circuits and systems

作者： Starostenko, O. Contreras Gomez, R. Alarcon-Aquino, v. Sergiyenko, O. Univ Americas Puebla Commun & Signal Proc Res Grp Dept Comp Sci Cholula Mexico Univ Autonoma Baja California Engn Inst Dept Appl Phys Mexicali Baja California Mexico

ISBN: (纸本)9781424444793

This paper presents the analysis of emerging data exchange technologies used for integration of mobile devices to image-based learning process of second language. Particularly, the design of portable personal spaces providing mobile access to multimedia documents based on XML technologies and creation of generic interfaces for learning environments have been carried out. For image-based languages learning that implies the image processing, recognition, and retrieval Two Segment Turning function has been proposed and analyzed for possible adoption in applications assisted by mobile devices. The evaluation of designed prototype of image-based language learning system for interpretation of Japanese kanji and Mayan glyphs on mobile devices is discussed in this paper. Additionally the performance of proposed approaches used in content-based image retrieval is evaluated for their possible integration within mobile learning environments.

关键词： Learning systems

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