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4th IEEE International Conference on Consumer Electronics Berlin (ICCE-Berlin)

作者： Kovacevic, Jelena Miljkovic, Goran Mihic, Velibor Lazic, Krsto Fac Tech Sci Dept Comp Engn & Commun Novi Sad Serbia RT RK Comp Based Syst Novi Sad Serbia

ISBN: (纸本)9781479961658

In order to guarantee the best user experience throughout different network access technologies with dynamically varying network conditions, it is fundamental to enable proper reception of the multimedia content. To overcome the limitations/deficiencies of evaluated adaptive streaming algorithms (such as slow rate adaptation at stable network conditions), we propose an Advanced Rate Adaptation algorithm (ARA, in the following text) and test it under various network scenarios. The algorithm is implemented as a part of the MPEG DASH compliant client.

关键词： IP networks hypermedia transport protocols video streaming MPEG DASH compliant client advanced rate adaptation algorithm dynamic adaptive streaming over HTTP dynamically varying network multimedia content Adaptive systems Bandwidth Bit rate Delays Heuristic algorithms History Streaming media

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Comparison of compression efficiency between HEVC/H.265 and VP9 based on subjective assessments 37

Comparison of compression efficiency between HEVC/H.265 and ...

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Conference on Applications of Digital Image Processing XXXVII

作者： Rerabek, Martin Ebrahimi, Touradj Ecole Polytech Fed Lausanne Multimedia Signal Proc Grp MMSPG Lausanne Switzerland

ISBN: (纸本)9781628412444

Current increasing effort of broadcast providers to transmit UHD (Ultra High Definition) content is likely to increase demand for ultra high definition televisions (UHDTVs). To compress UHDTV content, several alternative encoding mechanisms exist. In addition to internationally recognized standards, open access proprietary options, such as VP9 video encoding scheme, have recently appeared and are gaining popularity. One of the main goals of these encoders is to efficiently compress video sequences beyond HDTV resolution for various scenarios, such as broadcasting or internet streaming. In this paper, a broadcast scenario rate-distortion performance analysis and mutual comparison of one of the latest video coding standards H.265/HEVC with recently released proprietary video coding scheme VP9 is presented. Also, currently one of the most popular and widely spread encoder H.264/AVC has been included into the evaluation to serve as a comparison baseline. The comparison is performed by means of subjective evaluations showing actual differences between encoding algorithms in terms of perceived quality. The results indicate a dominance of HEVC based encoding algorithm in comparison to other alternatives if a wide range of bit-rates from very low to high bit-rates corresponding to low quality up to transparent quality when compared to original and uncompressed video is considered. In addition, VP9 shows competitive results for synthetic content and bit-rates that correspond to operating points for transparent or close to transparent quality video.

关键词： High Efficiency Video Coding (HEVC) Advanced Video Coding (AVC) VP9 WebM subjective quality assessment coding efficiency

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ACO-based media content adaptation for e-learning environments

ACO-based media content adaptation for e-learning environmen...

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IEEE International Conference on Computational Intelligence and Virtual Environments for Measurement systems and Applications

作者： M. Shamim Hossain Mehedi Masud Abdulhameed A. Alelaiwi Abdullah Alghamdhi Software Engineering Dept. King Saud University Riyadh KSA Computer Science Dept. Taif University KSA

The advances of ubiquitous communication infrastructures, the rapid adoption of mobile devices and pervasive computing technologies has allowed e-learning users access to multimedia learning contents in e-learning environments. However, because of the diversity and heterogeneity of the mobile users, their preferences, and the rich multimedia learning content, it is a major challenge for the access of learning content by the desired devices in the e-learning environment to user's satisfaction in terms of QoS demands. In order to alleviate the challenge of learning content mismatch, content adaptation is essential. To this end, we propose an ACO-based multimedia content adaptation approach, which inherits the adoption of ACO-based path selection behavior in the path computation for appropriate learning content customization. We compare our proposed approach with other two competitive algorithms, measure the performance and find that our proposed algorithms outperforms the basic AntNet and Genetic in terms of success rate, latency, runtime comparison and convergence. The performance evaluations are conducted using NetLogo simulation environment.

关键词： Electronic learning Quality of service Media Genetics Context Time factors Routing

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content-Based Video Copy Detection Benchmarking at TRECVID

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ACM TRANSACTIONS ON INFORMATION systems 2014年第3期32卷 14-14页

作者： Awad, George Over, Paul Kraaij, Wessel Dakota Consulting Inc Silver Spring MD 20910 USA NIST Informat Access Div Gaithersburg MD 20899 USA TNO Delft Netherlands Radboud Univ Nijmegen NL-6525 ED Nijmegen Netherlands

This article presents an overview of the video copy detection benchmark which was run over a period of 4 years (2008-2011) as part of the TREC Video Retrieval (TRECVID) workshop series. The main contributions of the article include i) an examination of the evolving design of the evaluation framework and its components (system tasks, data, measures);a high-level overview of results and best-performing approaches;and a discussion of lessons learned over the four years. The content-based copy detection (CCD) benchmark worked with a large collection of synthetic queries, which is atypical for TRECVID, as was the use of a normalized detection cost framework. These particular evaluation design choices are motivated and appraised.

关键词： algorithms Experimentation Measurement Performance Video copy detection multimedia evaluation TRECVID

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A hybrid metaheuristic approach to optimize the content transmission in multimedia systems

A hybrid metaheuristic approach to optimize the content tran...

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International Conference on Informatics in Control, Automation and Robotics (ICINCO)

作者： Arthur T. Gómez Luan C. Nesi Marcio G. Martins Leonardo D. Chiwiacowsky Master Program on Applied Computing University of the Sinos Valley São Leopoldo/RS Brazil

The advent of the digital television in Brazil has allowed users to access interactive channels. Once interactive channels are available, the users are able to find multimedia content such as movies and breaking news programs, to send and/or receive emails, to access interactive applications and also other contents. In this context, a high demand of requests from users is expected. Therefore, from the content provider's point of view, the determination of transmission parameters is needed in order to ensure the best quality of transmission to every user. The aforementioned identification problem is modelled as an optimization problem and a solution procedure based on metaheuristic techniques is proposed. Genetic Algorithm and Tabu Search metaheuristics are employed separately and coupled in a hybrid scheme to define the best transmission policy, optimizing the transmission parameters, such as audio and video transmission rates. Based on the experimental results, the hybrid algorithm has produced better solutions which meet the quality requirements.

关键词： Genetic algorithms Optimization Mathematical model multimedia communication Bandwidth Digital TV Servers

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content-aware association control in wireless networks

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Journal of Computational Information systems 2014年第7期10卷 2865-2872页

作者： Sun, Quan Huang, Liusheng Guo, Weijie Xu, Hongli School of Computer Science and Technology University of Science and Technology of China Hefei 230026 China

With the rapid development of wireless technology, it is of increasing interest to support various services in wireless LANs. access control and load balancing are employed to meet the different QoS requirements of different services. Although a number of AP access control schemes and load balancing techniques have been proposed for wireless LANs, few of them have considered the diversity of QoS requirements of different services, which can be used to improve QoS while balancing the traffic load. In this paper, we propose a new association control scheme, which considers the difference among user services' requirements and balances their load among APs. The defined problem CAL (content-aware Association control and Load balancing) is mathematically described as a min-max programming. Since the CAL problem is NP-hard, we propose an α-approximation (α≥2) centralized algorithm CCAL to resolve it. CCAL employs a novel method to simplify the original problem to the Minimum cost Maximum flow problem, which is solved in polynomial time. Extensive evaluations show that the proposed algorithms outperform the conventional schemes in terms of the bandwidth and traffic load. © 2014 Binary Information Press.

关键词： multimedia services

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Visual content Fingerprinting and Search An MPEG perspective

Visual Content Fingerprinting and Search An MPEG perspective

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Conference on Information Visualization Theory and Applications

作者： Miroslaw Z. Bober University of Surrey U.K.

ISBN: (纸本)9781479976874

Our society is creating, storing and using an ever increasing volumes of digital multimedia content. We have access to hundreds of billions of images and videos on the Internet, in the archives of professional content creators and owners, and in the personal libraries of home users. In this context, content-based identification of images' and videos and visual search capabilities are essential enablers for a range of applications that require fast, robust and efficient algorithms. The interoperability of the technologies and systems is also an important consideration. During the lecture Miroslaw Bober will review the latest advances in content fingerprinting and visual search and how they impact related standardisation efforts within the MPEG group. In particular will present the MPEG Visual Signatures, which include the Image Signature and Video Signature content description tools. The Visual Signatures are designed specifically to enable fast and robust identification of near duplicate or derived (modified) visual content in large-scale databases. We will also look at the latest addition to the MPEG family of standards: Compact Descriptors for Visual Search (CDVS). Achieving a state-of-the-art identification and recognition performance, the applications are numerous and include rights management and monetization, distribution management, usage monitoring, and professional or personal database management.

关键词： Our society professional content creators personal database management

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A weight-aware recommendation algorithm for mobile multimedia systems

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MOBILE INFORMATION systems 2013年第2期9卷 139-155页

作者： Rosa, Pedro M. P. Rodrigues, Joel J. P. C. Basso, Filippo Univ Beira Interior Inst Telecomunicacoes P-6201001 Covilha Portugal

In the last years, information flood is becoming a common reality, and the general user, hit by thousands of possible interesting information, has great difficulties identifying the best ones, that can guide him in his/her daily choices, like concerts, restaurants, sport gatherings, or culture events. The current growth of mobile smartphones and tablets with embedded GPS receiver, Internet access, camera, and accelerometer offer new opportunities to mobile ubiquitous multimedia applications that helps gathering the best information out of an always growing list of possibly good ones. This paper presents a mobile recommendation system for events, based on few weighted context-awareness data-fusion algorithms to combine several multimedia sources. A demonstrative deployment were utilized relevance like location data, user habits and user sharing statistics, and data-fusion algorithms like the classical CombSUM and CombMNZ, simple, and weighted. Still, the developed methodology is generic, and can be extended to other relevance, both direct (background noise volume) and indirect (local temperature extrapolated by GPS coordinates in a Web service) and other data-fusion techniques. To experiment, demonstrate, and evaluate the performance of different algorithms, the proposed system was created and deployed into a working mobile application providing real time awareness-based information of local events and news.

关键词： Mobile computing ubiquitous computing location-aware content-aware iphone applications multimedia applications mobility

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Proceedings of SPIE-IS and T Electronic Imaging - multimedia content access: algorithms and systems III

Proceedings of SPIE-IS and T Electronic Imaging - Multimedia...

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multimedia content access: algorithms and systems III

The proceedings contain 15 papers. The topics discussed include: discriminative genre-independent audio-visual scene change detection;a random walk through human behavior;flexible user interface for efficient content-based video surveillance retrieval: design and evaluation;an automated object-level video editing tool;ImageSeeker: a content-based image retrieval system;extraction of salient regions of interest using visual attention models;research on subjective stereoscopic image quality assessment;image quality assessment in multimedia applications;document description: what works for images should also work for text?;an annotation database for multimedia scientific data;a model of multimodal fusion for medical applications;and binary and nonbinary description of hypointensity for search and retrieval of brain MR images.

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DOAS: Device-Oriented Adaptive multimedia Scheme for 3GPP LTE systems

DOAS: Device-Oriented Adaptive Multimedia Scheme for 3GPP LT...

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IEEE 24th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Zou, Longhao Trestian, Ramona Muntean, Gabriel-Miro Dublin City Univ Sch Elect Engn Performance Engn Lab Dublin 9 Ireland

ISBN: (纸本)9781467362351

The growing popularity of the high-end mobile computing devices-smartphones, tablets, notebooks and more equipped with high-speed network access, enables the mobile user to watch multimedia content from any source on any screen, at any time, while on the move or stationary. In this context, the network operators must ensure smooth video streaming with the lowest service delay, jitter, and packet loss. This paper proposes a resource efficient Device-Oriented Adaptive multimedia Scheme (DOAS) built on top of the downlink scheduler in LTE-Advanced systems. DOAS bases its adaptation decision on the end-user device display resolution information and Quality of Service (QoS). DOAS is implemented on top of the Proportional Fair (PF) and the well-known Modified Largest Weighted Delay First (M-LWDF) scheduling algorithms within the 3GPP LTE/LTE-Advanced system. The performance of the proposed adaptive multimedia scheme was analyzed and compared against a non-adaptive solution in terms of throughput, packet loss and PSNR.

关键词： Long-term Evolution Mobile Device Resolution Downlink Scheduling

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