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A multilayered audiovisual streaming system using the network bandwidth adaptation and the two-phase synchronization

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IEEE Transactions on Multimedia 2009年第5期11卷 797-809页

作者： Huang, Chung-Ming Lin, Chung-Wei Chuang, Cheng-Yen Laboratory of Multimedia Mobile Network Department of Computer Science and Information Engineering National Cheng Kung University Tainan Taiwan

Synchronous audiovisual streaming and playout are two of the major issues in the multimedia communication network. However, the past corresponding researches of media synchronization mainly focused on the mono-quality and single-layer (nonscalable) audiovisual data. To overcome challenges of ubiquitous multimedia streaming, a scalable audiovisual coder that can provide flexible scalabilities and adaptive streaming control to adapt to complicated network situations are both required. This paper proposes a multilayered audiovisual streaming scheme to deliver layered audiovisual data synchronously, which is called ML-AVSS. Fine-granular scalability (FGS) and bit-sliced arithmetic coding (BSAC) techniques are used to segment video and audio data into one base-layer and multiple enhancement-layer bitstreams. With advantages of audiovisual layer coding, a de-jitter procedure, a conditional retransmission mechanism and a playout synchronization mechanism are designed to transmit hybrid multilayered audiovisual bitstreams in consideration of the result of a network bandwidth adaptation and the distinct decoding time-complexity. Experimental results show that the proposed ML-AVSS is a feasible streaming scheme to overcome challenges of ubiquitous multimedia streaming, e.g., constrained channel bandwidth, quality degradation, unsmooth playout, etc. © 2006 IEEE.

关键词： Synchronization

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Vision-based monitoring method using gray relational analysis

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IET computer Vision 2009年第3期3卷 103-111页

作者： Hsu, W.-L. Hsiao, C.-C. Chang, Y.-L. Chen, T.-L. Lunghwa University of Science and Technology Department of Computer Information and Network Engineering Taoyuan Taiwan National Taipei University of Technology Department of Electrical Engineering Taipei Taiwan Lunghwa University of Science and Technology Department of Electrical Engineering Taoyuan Taiwan

Intelligent surveillance system has become an important research topic in the field of computer vision. The authors propose a monitoring method based on the cellular model to monitor human activities in the indoor environment. The measured area of an indoor room is divided into several unit areas in which each unit area is considered as a simple cell in the cellular model. A rectangular box is then used to group those neighbouring active cells into a unit to represent a moving object. Since people usually walk without a fixed style and the colour of objects may be similar to that of the background, the distribution of active cells is often uncertain and incomplete. The authors therefore apply the gray relational analysis to detect and track multiple moving objects. Several experiments have been conducted to evaluate the performance of the proposed system. The experimental results show that the proposed system is highly effective in verifying and tracking multiple objects in real time. © 2009 The Institution of engineering and Technology.

关键词： Monitoring

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Concurrent error detection and correction in Gaussian normal basis multiplier over GF(2m)

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IEEE Transactions on computers 2009年第6期58卷 851-857页

作者： Chiou, Che Wun Chang, Chin-Cheng Lee, Chiou-Yng Hou, Ting-Wei Lin, Jim-Min Department of Computer Science and Information Engineering Ching Yun University Chung-Li 320 Taiwan Department of Information Engineering and Computer Science Feng Chia University Taichung City 407 Taiwan Department of Computer Information and Network Engineering Lunghwa University of Science and Technology Taoyuan County 333 Taiwan Department of Engineering Science National Cheng Kung University Tainan City 701 Taiwan

Fault-based cryptanalysis has been developed to effectively break both private-key and public-key cryptosystems, making robust finite field multiplication a very important research topic in recent years. However, no robust normal basis multiplier has been proposed in the literature. Therefore, this investigation presents a semisystolic Gaussian normal basis multiplier. Based on the proposed Gaussian normal basis multiplier, both concurrent error detection and correction capabilities can be easily achieved using time redundancy technology with no hardware modification. © 2009 IEEE.

关键词： Error correction

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Improvement of bonding driver and application to parallel processing on commodity PC cluster

Improvement of bonding driver and application to parallel pr...

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ICCAS-SICE 2009 - ICROS-SICE International Joint Conference 2009

作者： Fukunaga, Takafumi Department of Computer Network Engineering Kumamoto Prefectural College of Technology Kumamoto Japan

ISBN: (纸本)9784907764296

We have studied various methods for improving the performance of PC clusters. Most of them have used special hardware, non standard protocols, so that need special added library and complex programming, tending to raise their cost and to spoil their flexibility. To solve their problems we propose improving of Bonding driver. This improvement have a good influence on some kinds of parallel applications on commodity PC clusters without costing a great deal, using comparatively simple method where distribute sending frames to multiple network Interface Cards (hereafter NICs) on a round-robin basis. This means divide communication loads equally between multiple NICs attached to each PC. We measured the maximum bandwidth and parallel performance for the PC cluster with Gigabit Ethernet. A result shows our proposal method improves the bandwidth and the performance of several parallel benchmarks in comparison with the system using single NIC (hereafter 1NIC) and existing Bonding driver (hereafter Bond). The bandwidth comes up to 1,249Mbps which is 1.33 times and 1.47 times faster than those of 1NICand Bond. The bandwidth of Bond cannot even reach that of 1NIC. The results of SP and BT in NAS Parallel Benchmarks (NPB) come up to 1,715 Mop/s and 5,264Mop/s which are 1.81 and 1.63 times faster than 1NIC, 1.17 and 1.15 times faster than Bond respectively. © 2009 SICE.

关键词： Bandwidth

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Concurrent error detection and correction in dual basis multiplier over GF(2m)

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IET Circuits, Devices and Systems 2009年第1期3卷 22-40页

作者： Chiou, C.W. Lee, C.-Y. Lin, J.-M. Hou, T.-W. Chang, C.-C. Department of Computer Science and Information Engineering Ching Yun University 229 Chien-Hsin Road Chung-Li 320 Taiwan Department of Computer Information and Network Engineering Lunghwa University of Science and Technology Taoyuan County 333 Taiwan Department of Information Engineering and Computer Science Feng Chia University Taichung City 407 Taiwan Department of Engineering Science National Cheng Kung University Tainan City 701 Taiwan

Fault-based side-channel cryptanalysis is a useful technique against symmetrical and asymmetrical encryption/decryption algorithms. Thus, eliminating cryptographic computation errors become critical in preventing such kind of attacks. A simple way to eliminating cryptographic computation errors is to output correct or corrected ciphers. Multiplication is the most important finite field arithmetic operation in the cryptographic computations. By using time redundancy technique, a novel dual basis (DB) multiplier over Galois fields (2m) will be presented with lower space complexity and feedback-free property. Based on the proposed feedback-free DB multiplier, the DB multiplier with a concurrent error detection (CED) capability is also easily developed. Compared with the existing DB multiplier with CED capability, the proposed one saves about 90 of time-area complexity. No existing DB multiplier in the literature has concurrent error correction (CEC) capability. Based on the proposed DB multiplier, a novel DB multiplier with CEC capability is easily designed. The proposed DB multiplier with CEC capability requires only about 3 of extra space complexity and 15 of time complexity when compared with the proposed DB multiplier without CEC. © The Institution of engineering and Technology 2009.

关键词： Error correction

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EOG-BASED SIGNAL DETECTION AND VERIFICATION FOR HCI

EOG-BASED SIGNAL DETECTION AND VERIFICATION FOR HCI

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International Conference on Machine Learning and Cybernetics

作者： Deng, Lawrence Y. Hsu, Chun-Liang Lin, Tzu-Ching Tuan, Jui-Sen Chen, Yung-Hui Department of Computer Science and Information Engineering St. John's University Taiwan Department of Electrical Engineering St. John's University Department of Computer Information and Network Engineering Lunghwa University of Science and Technology Taiwan

ISBN: (纸本)9781424447053

In this paper, we proposed an eye-movement tracking system. Based on Electro-Oculography (E.O.G) technology we detected the signal with different directions in eye-movements and then analyzed to understand what they represented about (e.g. horizontal direction or vertical direction). We converted the analog signal to digital signal and then used as the control signals for Human computer Interface (HCI). In order to make the system "robust", several applications with EOG-based HCI had been designed. Our preliminary results revealed more than 90% accuracy rate for examining the eye-movement that may become a new useful human-machine user interface in the near future.

关键词： Electro-Oculography (EOG) Motor Neuron Disease Eye-Movement Amyotrophic Lateral Sclerosis Human-Machine/computer Interface (HMI/HCI)

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Visualization of flow data based on clustering technique for identifying network anomalies

Visualization of flow data based on clustering technique for...

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2009 IEEE Symposium on Industrial Electronics and Applications, ISIEA 2009

作者： Singh, Mayank Pal Subramanian, N. Rajamenakshi Department of Computer Network and Internet Engineering Center for Development of Advance Computing Bangalore India

ISBN: (纸本)9781424446827

In this paper we present an approach for visualizing net flow data through clustering to identify anomalies in network traffic. Various clustering techniques are applicable for Intrusion Detection for identifying anomalous events. In this paper we present an approach based on Simple K-Means for analyzing network flow data using any flow data attribute, such as IP address, port, protocols etc, to detect anomalies. Our approach is unique and efficient due to the preprocessing and filtering techniques devised. The outcome of our approach is firstly in its capability to detect anomalous network events, secondly in providing an overview about given data set based on key network parameters and thirdly, in providing visualization of interesting security events in a very intuitive way. We present our analysis and results where we demonstrate the visualization capabilities of our approach for detecting anomalous events. ©2009 IEEE.

关键词： Visualization

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An adaptive cross-layer mapping algorithm for MPEG-4 video transmission over IEEE 802.11e WLAN

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Telecommunication Systems 2009年第3-4期42卷 223-234页

作者： Lin, C.-H. Shieh, C.-K. Ke, C.-H. Chilamkurti, N.K. Zeadally, S. Department of Electrical Engineering National Cheng Kung University Tainan 701 Taiwan Department of Computer Science and Information Engineering National Kinmen Institute of Technology Kinmen Taiwan Department of Computer Science La Trobe University VIC Australia Network Systems Laboratory Department of Computer Science and Information Technology University of the District of Columbia Washington DC United States

This paper proposes an adaptive cross-layer mapping algorithm to improve the transmission quality of MPEG-4 video stream over an IEEE 802.11e wireless network. Instead of classifying video data to a specific access category in an 802.11e network, we propose an algorithm that dynamically maps MPEG-4 video packets to appropriate access categories according to both the significance of the video data and the network traffic load. Our proposed cross-layer architecture passes information about the significance of video packets from the application layer to the media access control layer. The queue length of a specific access category is used to deduce the network traffic load. We conducted a performance evaluation of our proposed cross-layer approach under both light and heavily loaded network conditions. Our simulation results demonstrate: (a) superior performance of our proposed approach (under both light and heavy loads) over 802.11e (Enhanced Distributed Channel Access (EDCA) and static mapping schemes, (b) not only guarantees prioritized transmission of essential video data but also provides efficient queue length utilization. © 2009 Springer Science+Business Media, LLC.

关键词： Motion Picture Experts Group standards

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Improved infrared thermography based image construction for biomedical applications using Markov Chain Monte Carlo method

Improved infrared thermography based image construction for ...

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31st Annual International Conference of the IEEE engineering in Medicine and Biology Society: engineering the Future of Biomedicine, EMBC 2009

作者： Umadevi, V. Suresh, S. Raghavan, S.V. Network Systems Laboratory Department of Computer Science and Engineering IIT Madras Chennai India Department of Mechanical Engineering IIT Madras Chennai India

ISBN: (纸本)9781424432967

Breast Thermography is one of the scanning techniques used for breast cancer detection. Looking at breast thermal image it is difficult to interpret parameters of tumor such as depth, size and location which are useful for diagnosis and treatment of breast cancer. In our previous work (ITBIC) we proposed a framework for estimation of tumor size using clever algorithms and the radiative heat transfer model. In this paper, we expand it to incorporate the more realistic Pennes bio-heat transfer model and Markov Chain Monte Carlo (MCMC) method, and analyze it's performance in terms of computational speed, accuracy, robustness against noisy inputs, ability to make use of prior information and ability to estimate multiple parameters simultaneously. We discuss the influence of various parameters used in its implementation. We apply this method on clinical data and extract reliable results for the first time using breast thermography. ©2009 IEEE.

关键词： Thermography (imaging)

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A novel multimedia assessment system architecture with duration evaluate

A novel multimedia assessment system architecture with durat...

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2009 Joint Conferences on Pervasive Computing, JCPC 2009

作者： Weng, Martin M. Chen, Yung-Hui Shih, Pei-Chun Liu, Y.C. Shih, Timothy K. Chao, Louis R. Department of Computer Science and Information Engineering Tamkang University Taiwan Dept. of Computer Information and Network Engineering Lunghwa University of Science and Technolog Taiwan Department of Computer Science National Taipei University of Education Taiwan Department of Computer Science and Information Engineering Asia University Taiwan

ISBN: (纸本)9781424452279

The development of assessment management system has been discussed for a long time. The motivation always focuses on the evaluation of learners ' ability or on the difficulties of examination. The common examination content could be composed by text or simple figures, and the assistant functionalities could also be developed to meet the individual needs. But these functionalities couldn't interoperate with each others in this situation, and the text content isn't enough to represent the examination content. In this paper, we proposed a novel system architecture to make interoperability realizable based on web service technologies then we also tried to integrate the multimedia streaming resources into our MAMS (MINE Assessment Management System). Through this architecture, we could easily integrate external functionalities without redeveloping the system. Besides, we propose another way to evaluate student's learning performance by duration of exam, and we will discuss the difficulty coefficient and duration of exam. ©2009 IEEE.

关键词： Interoperability

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