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Adaptive Error Resilient Coding Based on FMO in Wireless Video Transmission

Adaptive Error Resilient Coding Based on FMO in Wireless Vid...

引用

International conference on multimedia Information networking and Security (MINES)

作者： Feng Zhu Weiming Zhang Nenghai Yu Jiajia Xu Gang Wu MOE-Microsoft Key Laboratory of Multimedia Computing and Communication University of Science and Technology Hefei China

H.264/AVC is the latest video coding standard from ITU-T and ISO/IEC. Not only the compression performance is enhanced but also the robustness of video bit streams to errors is better. FMO (Flexible Macro-block Ordering) is a new error resilient tool adopted by H.264/AVC and it has a good performance of error resilience. In this paper, a novel FMO algorithm is proposed, and an adaptive coding scheme based on this new FMO algorithm is introduced. Experiment results show that the proposed FMO algorithm could achieve almost the same PSNR as the FMO Type 1, but has better robustness in wireless transmission, and the adaptive coding scheme can still guarantee a high PSNR in the case of high packet loss rate.

关键词： Encoding Wireless communication PSNR Streaming media Resilience Video sequences Markov processes

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Capacity Analysis of CDMA System Supporting Data Services

Capacity Analysis of CDMA System Supporting Data Services

引用

International conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Rui Ni Xiaowei Qin Guo Wei

In this paper, we proposed an analysis method on service capacity of CDMA system supporting data services. Cell spectrum efficiency and access available space the two concepts are used to constructed a new network performance evaluation system. An application layer service model and its corresponding cross-layer mapping method are also proposed. Based on the interference-limited CDMA system, we analysis the influence of different service characteristics for network performance both in single-service and multi-services condition.

关键词： Multiaccess communication Downlink Modulation Signal to noise ratio Turbo codes multimedia communication Physical layer

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TUIC: Enabling tangible interaction on capacitive multi-touch display 11

TUIC: Enabling tangible interaction on capacitive multi-touc...

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Proceedings of the SIGCHI conference on Human Factors in computing Systems

作者： Yu, Neng-Hao Chan, Li-Wei Lau, Seng-Yong Tsai, Sung-Sheng Hsiao, I-Chun Tsai, Dian-Je Cheng, Lung-Pan Hsiao, Fang-I Chen, Mike Y. Huang, Polly Hung, Yi-Ping Department of Computer Science and Information Engineering Taiwan Department of Electrical Engineering Taiwan Graduate Institute of Networking and Multimedia National Taiwan University Taiwan

ISBN: (纸本)9781450302289

We present TUIC, a technology that enables tangible interaction on capacitive multi-touch devices, such as iPad, iPhone, and 3M's multi-touch displays, without requiring any hardware modifications. TUIC simulates finger touches on capacitive displays using passive materials and active modulation circuits embedded inside tangible objects, and can be used with multi-touch gestures simultaneously. TUIC consists of three approaches to sense and track objects: spatial, frequency, and hybrid (spatial plus frequency). The spatial approach, also known as 2D markers, uses geometric, multi-point touch patterns to encode object IDs. Spatial tags are straightforward to construct and are easily tracked when moved, but require sufficient spacing between the multiple touch points. The frequency approach uses modulation circuits to generate high-frequency touches to encode object IDs in the time domain. It requires fewer touch points and allows smaller tags to be built. The hybrid approach combines both spatial and frequency tags to construct small tags that can be reliably tracked when moved and rotated. We show three applications demonstrating the above approaches on iPads and 3M's multi-touch displays. Copyright 2011 ACM.

关键词： Display devices

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Overlay multicast tree construction algorithm for stable multimedia service

Overlay multicast tree construction algorithm for stable mul...

引用

Consumer Communications and networking conference, CCNC IEEE

作者： Oh Chan Kwon Hwangjun Song Tai-Won Um Department of Computer Science and Engineering POSTECH Pohang South Korea Smart Screen Convergence Research Department Electronics and Telecommunications Research Institute Daejeon South Korea

This work presents an overlay multicast tree construction algorithm to support stable multimedia service over the Internet. While constructing a multicast tree, it takes into account not only the link delay, but also the peer stability. Since peers actually show dynamic and unstable behavior over peer-to-peer network, it is essential to consider the peer stability. Furthermore, the weighting factor between link delay and peer stability is adaptively controlled. Basically, Genetic algorithm is employed to obtain a near optimal solution with a low computational complexity. Finally, simulation results are provided to show the performance of the proposed algorithm.

关键词： Delay Peer to peer computing Stability criteria Prediction algorithms Lead multimedia communication

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Emergency operations support through social networking and P2P multimedia services

Emergency operations support through social networking and P...

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International conference on Telecommunications (ICT)

作者： Charalampos Patrikakis Athanasios Voulodimos Emmanuel Sardis Nikolaos Papaoulakis Dora Christofi Georgios Dimosthenous Emmanuel Sardis Nikolaos Papaoulakis School of Electrical and Computer Engineering National and Technical University of Athens Athens Greece Research and Development PrimeTel Limassol Cyprus

In this paper we investigate the requirements and propose the design of a platform that will serve emergency operations such as in cases of wildfires or road accidents. This platform will provide assistance to the rescue and the disaster relief operations through the use of social networking and P2P based multimedia streaming. The general idea is to create a platform that will facilitate the provision of an efficient communication network between the stakeholders who will be involved in such life threatening situations and of the means for having a rich, multimedia based communication for first aid and guidance. Based on the use of the proposed platform the distribution of multimedia streams can be supported through innovative techniques such as media encoding and media distribution. The matching and notification of the most appropriate volunteers can be made through the use of personal profiles and the deployment of social networking tools. The access to multimedia content can be adapted to the obstacles which are introduced through the impairment of infrastructures of services capabilities.

关键词： Media Streaming media multimedia communication Fires Encoding Social network services Peer to peer computing

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Utilization of a SIMD Unit in the OS Kernel

Utilization of a SIMD Unit in the OS Kernel

引用

International conference on networking and computing (ICNC)

作者： Shogo Saito Shuichi Oikawa Department of Computer Science University of Tsukuba Tsukuba Ibaraki Japan

Nowadays, it is very common that a processor includes a SIMD (Single Instruction Multiple Data) unit in order to accelerate application processing. While a SIMD unit is a part of a processor, it evolves more rapidly than the integer unit of the processor. Since the use of an FPU (Floating Point Unit) and a SIMD unit is basically abandoned from the kernel, there can be places inside the kernel where a SMID unit works effectively to deal with a large amount of data processing. This paper describes our preliminary work to explore the possibility to utilize a SIMD unit in the kernel. We performed preliminary experiments by using UML (User Mode Linux) and show that data copying can be improved.

关键词： Kernel Unified modeling language Linux Data processing Optimization multimedia communication Acceleration

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TVWS opportunities and regulation: - Empowering rural India

TVWS opportunities and regulation: - Empowering rural India

引用

2011 14th International Symposium on Wireless Personal multimedia Communications: Communications, networking and Applications for the Internet of Things, WPMC'11

作者： Dhope, Tanuja Satish Simunic, Dina Prasad, Ramjee Faculty of Electrical Engineering and Computing University of Zagreb Croatia Aalborg University Aalborg Denmark

ISBN: (纸本)9781457717864

700MHz band attracted many researchers and stakeholders for mobile communications by providing a rare opportunity to have cost effective wireless solutions due to its excellent propagation characteristics compared to GSM 1800 MHz, 2.1 GHz or 2.5 GHz bands for 3G/BWA. In India, 698-806 MHz more specific 700MHz band mainly used by TV broadcast services. We discuss the scope and nature of opportunities for white space created by Digital Dividend (700 MHz band) in India especially to rural India by providing wireless broadband for the applications like e-education, e-agriculture, e-animal husbandry and e-health which would help in decreasing primary school drop-out rate, in decreasing farmer suicides rate and in decreasing mortality rate. Further use cases for the exploitation of TV White Space suitable for rural India are discussed based on user's and BS geo-location and user's mobility;which is followed by an overview of recent regulatory activities. © 2011 National Institute of Inform.

关键词： Cognitive radio

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Towards strategic resource allocation in overlay networks based on monopoly auction mechanism

Towards strategic resource allocation in overlay networks ba...

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Consumer Communications and networking conference, CCNC IEEE

作者： Mohammad Hossein Rezvani Morteza Analoui School of Computer Engineering Iran University of Science and Technology Tehran Iran

This paper targets at service provisioning and bandwidth allocation in single-service overlay multicast network by modeling it as a first-price monopoly auction. We propose a game theoretic pricing mechanism for determining the distribution of a typical multimedia content from an origin server, via the unicast links. By leveraging the rich theory of strategic mechanism design of microeconomics, we formulate this problem as an optimization problem that aims to achieve Nash equilibrium for bidding strategy of the buyers. In our proposal, the content of the multimedia service accounts for the good. The sellers of this auction economy are either the origin server or the peers who forward the multimedia service to their downstream peers. For each seller, its corresponding downstream peers play the role of buyers who are referred to as bidders. Each bidder submits a sealed bid to its corresponding seller. The high bidder wins and pays its bid for the service. The analytical and experimental results prove the efficiency of the proposed mechanism in terms of the overlay path stretch.

关键词： Peer to peer computing Microeconomics Servers Bandwidth Monopoly multimedia communication Protocols

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Diurnal Forced Models for Worm Propagation Based on Conficker Dataset

Diurnal Forced Models for Worm Propagation Based on Conficke...

引用

International conference on multimedia Information networking and Security (MINES)

作者： Yu Yao Wen-long Xiang Hao Guo Ge Yu Fu-xiang Gao Key Laboratory of Medical Image Computing Ministry of Education School of Information Science and Engineering Northeastern University Shenyang China

Due to the vulnerability of computer system, Internet worm is still greatly threatenning network security. It is found that the spread of worm regularly change because of the different space distributions of hosts and this phenomenon is defined as diurnal pattern. Based on diurnal pattern, two worm propagation models, namely simple diurnal forced model and complicated diurnal forced one, are constructed to describe and predict worm propagation. To verify the accuracy of them, Conficker dataset is adopted to obtain the practical curves of worm propagation. Through comparisons of numerical curves from models and practical curves, it is proved that simple model is good in describing the initial stage of worm propagation and complicated model can accurately predict the whole worm propagation.

关键词： Grippers Numerical models Computational modeling Security Predictive models Mathematical model Data models

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Dynamic QoS management in mobile services framework

Dynamic QoS management in mobile services framework

引用

IEEE International conference on multimedia computing and Systems (ICMCS)

作者： Rida Zoubairi Zahi Jarir Mohammed Erradi Computer Science Department Faculty of Sciences Cadi Ayyad University Marrakech Morocco Alkhawarizmi Computing Research Laboratory ENSIAS Mohammed-V University Rabat Morocco

The current ever-growing advances in wireless networking and the great success of mobile computing have contributed to the development of an increasing amount of mobile services. Due to this growth of published services, quality of service (QoS) is becoming a key feature to provide the most appropriate needed service to mobile clients according to their requirements. However, managing QoS represents a critical and significant challenge in the mobile computing because of the dynamic nature of mobile environment. In addition, Service providers can use different and non-standard QoS parameters to describe QoS properties of a published service. At this end, and based on MAQAME Architecture suggested in our previous work, our current contribution is to implement QoS Management System which is responsible to propose the most appropriate service in term of QoS among the provided local mobile services. This implementation uses Devices Profile for Web Services (DPWS) specification, WS-Policy for QoS policy specification and Apache Neethi for policy processing.

关键词： Quality of service Mobile communication Protocols Middleware Mobile computing Computer architecture Context

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