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检索条件"任意字段=Conference on Multimedia Content Access - Algorithms and Systems"

共 2023 条记录，以下是571-580 订阅

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3D-ICONS: World Heritage sites for Europeana: Making complex 3D models available to everyone

3D-ICONS: World Heritage sites for Europeana: Making complex...

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2012 18th International conference on Virtual systems and multimedia: Virtual systems in the Information Society, VSMM 2012

作者： D'Andrea, A. Niccolucci, F. Bassett, S. Fernie, K. Centro Interdipartimentale di Servizi di Archeologia Università degli Studi di Napoli L'Orientale Napoli Italy MDR Partners London United Kingdom

ISBN: (纸本)9781467325653

3D-ICONS is a European project which will enhance the content base available to Europeana users through targeted 3D digitization of European architectural and archaeological monuments. The "3D Icons" will be selected through their listing by UNESCO on its World Heritage (WH). The project aims to complement the collections which are being made accessible to Europeana via CARARE, Europeana Local, Athena and other projects which have developed the content base for the cultural heritage. 3D-ICONS aims to complement the 3D content brought to Europeana via the CARARE project, enabling public access to complex models and increasing the critical mass of this engaging type of content. © 2012 IEEE.

关键词： 3D models 3D-ICONS cultural heritage digitisation Europeana public access UNESCO

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A Quality of Experience Handover System for Heterogeneous multimedia Wireless Networks

A Quality of Experience Handover System for Heterogeneous Mu...

引用

International conference on Computing, Networking and Communications

作者： Carlos Quadros Eduardo Cerqueira Augusto Neto Antonio Pescapé Andre Riker Roger Immich Marilia Curado Federal University of Para Belém Brazil Federal University of Ceara Fortaleza Brazil University of Napoli Federico II Naples Italy University of Coimbra Coimbra Portugal

ISBN: (纸本)9781467352871

The convergence of emerging real-time multimedia services, the increasing coverage of wireless networks and the ever-growing popularity of mobile devices, are leading to an era of user-centric multimedia wireless services. In this scenario, heterogeneous communications will co-exist and ensure that the end-user is always best connected. However, the Quality of Experience (QoE) support for emerging video applications in multi-operator environments remains a significant challenge and is crucial for the success of wireless multimedia systems. This paper presents a Quality of Experience Handover Architecture for Converged Heterogeneous Wireless Networks, called QoEHand. QoEHand allows users of multimedia content to be always best connected in IEEE 802.11e and IEEE 802.16e environments. Simulation results show the impact and benefit of the proposed solution in multi-access and multi-operator wireless scenarios by using objective and subjective QoE metrics.

关键词： Video Streaming QoE Wireless networks

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On-the-fly Watermarking of Videos for Real-time Applications

On-the-fly Watermarking of Videos for R...

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IEEE International conference on multimedia and Expo Workshops (ICMEW)

作者： Mehta, Sachin Varadharajan, Vijayaraghavan Nallusamy, Rajarathnam Infosys Ltd Infosys Labs Bangalore 560100 Karnataka India

ISBN: (纸本)9780769547299

In order to prevent piracy of digital media content, Digital Watermarking has emerged as a potential alternative to existing methods such as Digital Rights Management (DRM) based systems. For real-time watermarking applications, digital watermarking method should consume less time for embedding the watermark while remaining robust against attacks. This paper presents on-the-fly video watermarking method for the copyright protection of videos and also addresses implementation issues in real-time applications. Experimental results show that the proposed method requires less computational time for embedding the watermark and hence is suitable for real-time applications. The results also show that the method is robust against attacks. The proposed method is compared with other watermarking algorithms and it yields better results in terms of complexity and robustness.

关键词： Video Watermarking Copyright Protection multimedia Security Statistical Watermarking

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Towards Automatic Detection of CBIRs Configuration

Towards Automatic Detection of CBIRs Configuration

引用

18th International conference on multimedia Modeling (MMM 2012)

作者： Vilsmaier, Christian Karp, Rolf Doeller, Mario Kosch, Harald Brunie, Lionel Univ Passau Chair Distributed & Multimedia Informat Sytems D-94032 Passau Germany

ISBN: (纸本)9783642273544

Many content Based Image Retrieval systems (CBIRs) have been invented in the last decade. The general mechanism of the search process is very similar for each of these CBIRs, and the calculation of rankings is determined by the comparison of features (low-, mid-, high-level). Nevertheless, all things being equal, the respective realization leads to different results. Knowledge about the internal configuration (used features, weights and metrics) of these systems would be beneficial in many usage scenarios (e.g., by using a query image content sensitive query forwarding strategy or improved result ranking strategies in meta search engines). In this context, the paper presents an approach that supports an automatic detection of the configuration of CBIR systems. We demonstrate that the problem can be partly traced back to an optimization problem and tested several optimization algorithms. The approach has been evaluated based on the ImageCLEF test set and shows good results.

关键词： CBIRs configuration Image Database Low-level Feature detection

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A study of packet scheduling with mobile cellular channel impairments

A study of packet scheduling with mobile cellular channel im...

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2012 International conference on Computer and Communication Engineering, ICCCE 2012

作者： Ramli, Huda Adibah Mohd Sandrasegaran, Kumbesan Abdullah, Khaizuran Kuala Lumpur Malaysia Faculty of Engineering and Information Technology University of Technology Sydney NSW Australia

ISBN: (纸本)9781467304788

Long Term Evolution-Advanced (LTE-A) is a new radio access technology that is expected to provide better experience among the mobile cellular users. It delivers multimedia services using packet switching technology. Therefore, intelligent design of packet scheduling for the LTE-A to provide Quality of Service (QoS) comparable to fixed line services becomes crucial. However, packet scheduling over the LTE-A system faces a number of challenges. This paper studies a number of low complexity real time packet scheduling algorithms developed for the legacy mobile cellular systems. In addition to that, studies on performance impact due to mobile cellular channel impairments are presented. The study aims to identify the methods used by the existing packet scheduling algorithms as well to ascertain the performance degradations on the QoS of multimedia services due to the impact of the mobile cellular channel impairments. Future works include development of a new packet scheduling algorithm to overcome detrimental effects due to LTE-A channel impairments on the QoS of multimedia services. © 2012 IEEE.

关键词： multimedia services

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A Multipath Rayleigh Channel Modeling for Radio Resource Management in IEEE 802.16e Standard

A Multipath Rayleigh Channel Modeling for Radio Resource Man...

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6th International conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)

作者： Kabaou, Mohamed Ouwais Chibani, Belgacem Hamouda, Hassen Bouhlel, M. Salim University of Gabes National School of Engineering R.U. MACS ENIG-Gabes 6029

ISBN: (纸本)9781467316583

The Worldwide Interoperability for Microwave access and Long Term Evolution is a telecommunications technologies aimed at providing wireless data over long distances in a variety of ways based on the IEEE 802.16 standard. This paper presents radio resource management and performance analysis for WiMax and LTE by using RRM (Radio Resource Management) methods. Providing a comparison between different traffics (e. g. video (streaming), data and voice) for multimedia communication systems (3G), the paper offers different standpoints that can satisfy a researchers looking for theoretical analysis and advanced algorithms or searching for their concrete application in the real networks. The paper also demonstrates the importance of the radio resource management (RRM) in a wireless communication networks for OFDMA systems. We concentrate our study in the reservation of the radio resources according the Rayleigh channel. Multipath Rayleigh channel E-Model is useful in wireless communications (IEEE 802.16e). These phenomena include multipath scattering effects, time dispersion, and Doppler shifts that arise from relative motion between the transmitter and receiver.

关键词： OFDM modulation Rayleigh channels WiMax frequency division multiple access multimedia communication multipath channels

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Predicting the Ratings of multimedia Items for Making Personalized Recommendations 12

Predicting the Ratings of Multimedia Items for Making Person...

引用

35th ACM SIGIR Annual International conference on Research and Development in Information Retrieval

作者： Qumsiyeh, Rani Ng, Yiu-Kai Brigham Young Univ Dept Comp Sci Provo UT 84602 USA

ISBN: (纸本)9781450316583

Existing multimedia recommenders suggest a specific type of multimedia items rather than items of different types personalized for a user based on his/her preference. Assume that a user is interested in a particular family movie, it is appealing if a multimedia recommendation system can suggest other movies, music, books, and paintings closely related to the movie. We propose a comprehensive, personalized multimedia recommendation system, denoted MudRecS, which makes recommendations on movies, music, books, and paintings similar in content to other movies, music, books, and/or paintings that a MudRecS user is interested in. MudRecS does not rely on users' access patterns/histories, connection information extracted from social networking sites, collaborated filtering methods, or user personal attributes (such as gender and age) to perform the recommendation task. It simply considers the users' ratings, genres, role players (authors or artists), and reviews of different multimedia items, which are abundant and easy to find on the Web. MudRecS predicts the ratings of multimedia items that match the interests of a user to make recommendations. The performance of MudRecS has been compared with current state-of-the-art multimedia recommenders using various multimedia datasets, and the experimental results show that MudRecS significantly outperforms other systems in accurately predicting the ratings of multimedia items to be recommended.

关键词： multimedia recommender rating genre review popularity

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Effective Caching Schemes for Minimizing Inter-ISP Traffic in Named Data Networking

Effective Caching Schemes for Minimizing Inter-ISP Traffic i...

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IEEE 18th International conference on Parallel and Distributed systems (ICPADS)

作者： Li, Jun Wu, Hao Liu, Bin Lu, Jianyuan Tsinghua Univ Dept Comp Sci Beijing 100084 Peoples R China

ISBN: (纸本)9781467345651;9780769549033

Internet has evolved to be content-oriented and its key usage focuses on content dissemination and retrieval, while Internet architecture is designed for host-oriented services. To address the challenge, Named Data Networking (NDN) has been proposed, where in-network caching becomes a new research topic due to its dominant position in NDN architecture. This work develops efficient caching schemes for Internet Service Providers (ISPs) so as to maximize the inter-ISP traffic savings. With the special goal, we design caching system according to the NDN network model and present coordinated caching algorithms which can dynamically determine cache placement along the forwarding path. Comprehensive simulation results show that our schemes outperform the widely used Leaving Copies Everywhere (LCE) both in inter-ISP traffic savings and the average number of access hops by up to 20%. In addition, we demonstrate good feasibility of the proposed caching algorithms in a set of simulations spanning a wide range of parameter values.

关键词： Named Data Networking content-centric In-network caching Coordinated caching Popularity-based

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Hierarchical key assignment scheme for multimedia access control with modified hash chain

Hierarchical key assignment scheme for multimedia access con...

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2012 8th International conference on Intelligent Information Hiding and multimedia Signal Processing, IIH-MSP 2012

作者： Imaizumi, Shoko Aoki, Naokazu Kobayashi, Hiroyuki Kiya, Hitoshi Graduate School of Advanced Integration Science Chiba University 1-33 Yayoicho Inage-ku Chiba-shi Chiba Japan Dept. of Information and Communication Systems Tokyo Metropolitan University 6-6 Asahigaoka Hino-shi Tokyo Japan

ISBN: (纸本)9780769547121

We propose a key assignment scheme and applying it to control hierarchical access to multimedia content. By introducing a modified hash chain, the proposed scheme manages one key composed of a single segment. The managed key is not distributed to any users, providing security against key leakage. Collusion attacks are prevented by the order of key assignment. Our scheme also reduces the number of hash calculations. Analysis of performance demonstrated this scheme is valid. © 2012 IEEE.

关键词： Hash functions

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content-assisted File Decoding for Nonvolatile Memories

Content-assisted File Decoding for Nonvolatile Memories

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46th Asilomar conference on Signals, systems and Computers

作者： Li, Yue Wang, Yue Jiang, Anxiao (Andrew) Bruck, Jehoshua Texas A&M Univ Dept Comp Sci & Engn College Stn TX 77843 USA CALTECH Dept Elect Engn Pasadena CA 91125 USA

ISBN: (纸本)9781467350518

Nonvolatile memories (NVMs) such as flash memories play a significant role in meeting the data storage requirements of today's computation activities. The rapid increase of storage density for NVMs however brings reliability issues due to closer alignment of adjacent cells on chip, and more levels that are programmed into a cell. We propose a new method for error correction, which uses the random access capability of NVMs and the redundancy that inherently exists in information content. Although it is theoretically possible to remove the redundancy via data compression, existing source coding algorithms do not remove all of it for efficient computation. We propose a method that can be combined with existing storage solutions for text files, namely content-assisted decoding. Using the statistical properties of words and phrases in the text of a given language, our decoder identifies the location of each subcodeword representing some word in a given input noisy codeword, and flips the bits to compute a most likely word sequence. The decoder can be adapted to work together with traditional ECC decoders to keep the number of errors within the correction capability of traditional decoders. The combined decoding framework is evaluated with a set of benchmark files.

关键词： decoding error correction codes integrated circuit reliability random-access storage source coding

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