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An adaptive optimal multimedia network transmission control scheme 2nd

2nd IEEE Pacific-Rim Conference on Multimedia, IEEE-PCM 2001

作者： Shyu, Mei-Ling Chen, Shu-Ching Luo, Hongli Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States Distributed Multimedia System Laboratory Florida International University School of Computer Science MiamiFL33199 United States

ISBN: (纸本)3540426809

In this paper, we present a sender-driven adaptive optimal multimedia network transmission control scheme, which takes into account the buffer occupancy and network delay to maximize the utilization of network resources. For this purpose, adaptive network resource optimization with quadratic costs is used in the proposed scheme to provide the minimal allocation of the bandwidth and achieve the maximal utilization of the client buffer. Simulation results show that the transmission rate can be dynamically adjusted at the server according to the changing network delays and buffer packet sizes at the client to avoid the loss of packets, and at the same time to achieve the minimal bandwidth allocation at maximal utilization of the client buffer. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Bandwidth

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Optimal resource utilization in multimedia transmission

Optimal resource utilization in multimedia transmission

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2001 IEEE International Conference on Multimedia and Expo, ICME 2001

作者： Shyu, Mei-Ling Chen, Shu-Ching Luo, Hongli Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States

ISBN: (纸本)0769511988

Efficient utilization of network resources is essential in the provision of quality multimedia services. Different approaches have been proposed to shape the multimedia streams as a transmission schedule with smoothed traffic burst. In this paper, we concentrate on the problem of efficient use of bandwidth and client buffer. For this purpose, an optimal transmission schedule is proposed to provide the minimal allocation of the bandwidth and maximal utilization of the client buffer. Simulation results show that the shaping results obtained can dynamically adjust the transmission rate according to the buffer packet sizes and playback rates at the client to avoid the loss of packets, and at the same time achieve the minimal bandwidth allocation and maximal utilization of the client buffer.

关键词： Bandwidth

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Supporting Information Reuse for Video Data Indexing by Using Color Information 3

Supporting Information Reuse for Video Data Indexing by Usin...

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3rd International Conference on Information Reuse and Integration, IRI 2001

作者： Zhang, Chengcui Luo, Lin Chen, Shu-Ching Shyu, Mei-Ling Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)9781618398390

In this paper, an object tracking framework assisted by image segmentation and color indexing techniques to support information reuse for video data is proposed. In order to obtain more accurate results of object tracking, a color indexing method called Color Label Criteria (CLC) is adopted to relax some of the restrictions and assumptions in object tracking in our previous work with low additional cost. Our experiment results on a real video sequence show that the CLC color indexing method is very helpful to achieve more robust object tracking. © (2001) by the International Society for computers and Their Applications All rights reserved.

关键词： Image segmentation

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A new incremental rerouting for handoff in wireless ATM networks 1st

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1st International Conference on Human.Society@Internet, 2001

作者： Youn, Hee Yong Kim, Hee-Suk Choo, Hyunseung Kim, Keecheon School of Electrical and Computer Engineering Sungkyunkwan University Suwon440-746 Korea Republic of Media Communications Dept Digital Network System Lab LG Electronics Inc Korea Republic of Dept. Of Computer Science and Engineering Konkuk University Seoul143-701 Korea Republic of

ISBN: (纸本)3540423133

Whenever a handoff occurs in wireless ATM network, the connection for mobile user must be reestablished in the new area. This paper proposes a new path re-routing scheme based on the incremental re-establishment approach, which decides the crossover node by comparing the distances between each node in the existing path and the new location, while traversing the path backward. This scheme allows us to efficiently decide a new path close to the shortest path. In order to realistically evaluate and compare the proposed scheme, we model the distance a mobile user makes for the given mobile speed and call duration statistics and propose a new approach for generating realistic random network. Comprehensive computer simulation for various random networks shows that the proposed scheme outperforms previous schemes in terms of path efficiency and handoff delay. We also obtain path reuse efficiency of more than 80%. The proposed scheme can be implemented by making use of the information in the routing table in the existing network structure. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Efficiency

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IDENTIFYING OVERLAPPED OBJECTS FOR VIDEO INDEXING AND MODELING IN MULTIMEDIA DATABASE systemS

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International Journal on Artificial Intelligence Tools 2001年第4期10卷 715-734页

作者： SHU-CHING CHEN MEI-LING SHYU CHENGCUI ZHANG R. L. KASHYAP Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL 33199 USA Department of Electrical and Computer Engineering University of Miami Coral Gables FL 33124 USA School of Electrical and Computer Engineering Purdue University West Lafayette IN 47907 USA

The identification of the overlapped objects is a great challenge in object tracking and video data indexing. For this purpose, a backtrack-chain-updation split algorithm is proposed to assist an unsupervised video segmentation method called the "simultaneous partition and class parameter estimation" (SPCPE) algorithm to identify the overlapped objects in the video sequence. The backtrack-chain-updation split algorithm can identify the split segment (object) and use the information in the current frame to update the previous frames in a backtrack-chain manner. The split algorithm provides more accurate temporal and spatial information of the semantic objects so that the semantic objects can be indexed and modeled by multimedia input strings and the multimedia augmented transition network (MATN) model. The MATN model is based on the ATN model that has been used in artificial intelligence (AI) areas for natural language understanding systems, and its inputs are modeled by the multimedia input strings. In this paper, we will show that the SPCPE algorithm together with the backtrack-chain-updation split algorithm can significantly enhance the efficiency of spatio-temporal video indexing by improving the accuracy of multimedia database queries related to semantic objects.

关键词： Multimedia Augmented Transition Network (MATN) Multimedia Input String Backtrack-Chain-Updation Split Algorithm Multimedia Database systems

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Synthesis of ASM-based self-checking controllers

Synthesis of ASM-based self-checking controllers

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Euromicro Symposium on Digital system Design

作者： I. Levin V. Sinelnikov M. Karpovsky School of Education Tel-Aviv University Israel Department of Computer Science Academic Technological Institute Department of Electrical Computer and System Engineering Boston University USA

In this paper we present a new technique for on-line checking of FPGA-based sequential devices defined by their algorithmic state machines (ASMs). The technique utilizes specific properties of ASMs for achieving the totally self-checking goal with a low hardware overhead. This technique is based on the architecture that consists of two portions: a self-checking sequential device and a separate totally self-checking (TSC) checker. Each of these portions is implemented as a combination of an "evolution" block and an "execution" block. Comparison of code vectors transferred between these blocks provides for the totally self-checking property. The proposed technique does not require any redundant encoding of output words and uses a one-rail design, thereby drastically decreasing the required overhead. The paper presents overhead estimations and results for benchmarks for the proposed architecture.

关键词： Circuit faults Control system synthesis Control systems Centralized control Fault detection Hardware Digital systems Circuit synthesis Electrical fault detection Network synthesis

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Video scene change detection method using unsupervised segmentation and object tracking

Video scene change detection method using unsupervised segme...

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IEEE International Conference on Multimedia and Expo (ICME)

作者： Shu-Ching Chen Mei-Ling Shyu Cheng-Cui Zhang R.L. Kashyap Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL USA Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA School of Electrical and Computer Engineering Purdue University West Lafayette IN USA

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Task-based compliance planning for multifingered hands

Task-based compliance planning for multifingered hands

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Byoung-Ho Kim Byung-Ju Yi Sang-Rok Oh Il Hong Suh School of Electrical Engineering and Computer Science Hanyang University Seoul South Korea Intelligent System Control Research Center Korea Institute of Science and Technology Seoul South Korea

ISBN: (纸本)0780365763

Based on the analysis of the stiffness relation between the operational space and the fingertip space of multifingered hands, this paper provides a guideline of task-based compliance planning for multifingered hands. 2D and 3D examples are illustrated to show the characteristics of the task-based stiffness matrix. It is shown that some of coupling stiffness elements cannot be planned arbitrarily due to grasping geometry. Through the analytical results, it is concluded that the operational stiffness matrix should be carefully specified by considering the location of compliance center and the grasp geometry of multifingered hands for successful grasping and manipulation tasks.

关键词： Fingers Grasping Force sensors Computational geometry Force control Guidelines Robot sensing systems Robot control Orbital robotics computer science

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Optimal grasping based on non-dimensionalized performance indices

Optimal grasping based on non-dimensionalized performance in...

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IEEE International Workshop on Intelligent Robots and systems (IROS)

作者： Byoung-Ho Kim Sang-Rok Oh Byung-Ju Yi Il Hong Suh School of Electrical Engineering and Computer Science Hanyang University Seoul South Korea INtelligent System Control Research Center KIST Seoul South Korea

For a multi-fingered hand to grasp an object, there are numerous ways to grasp it stably, and thus an optimal grasp planning is necessary to find the optimal grasp point for achieving the objective of the given task. First, we define several grasp indices to evaluate the quality of each feasible grasp. Since the physical meanings of the defined grasp induces are different from each other, it is not easy to combine those indices to identify the optimal grasping. In this paper, we propose a new generalized grasping performance index to represent all of the grasp indices as one measure based on a non-dimensional technique. Through simulations, we show that the proposed optimal grasp planning is resemblant to the physical sense of human grasping.

关键词： Grasping Uncertainty Fingers computer science Intelligent systems Intelligent control Control systems Humans Performance analysis Ellipsoids

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Mining user access behavior on the WWW

Mining user access behavior on the WWW

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IEEE International Conference on systems, Man and Cybernetics

作者： Mei-Ling Shyu Shu-Ching Chen Choochart Haruechaiyasak Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA Distributed Multimedia System Laboratory School of Computer Science Florida International University Miami FL USA

In this paper, an affinity-based approach that provides good similarity measures for Web document clustering to discover user access behavior on the World Wide Web (WWW) is proposed. The proposed approach generates the similarity measures for groups of Web documents by considering the user access patterns. Any clustering algorithm using better similarity measures should yield better clusters for discovering user access behavior. By utilizing the discovered user access behavior, for example, the companies can precisely target their potential customers and convince them to purchase their products or services in electronic commerce. An experiment on a real data set is conducted and the experimental result shows that the proposed approach yields a better performance than the cosine coefficient and the Euclidean distance method under the partitioning around medoid (PAM) method.

关键词： World Wide Web Uniform resource locators Electronic commerce Web sites Clustering algorithms Multimedia systems Laboratories computer science Electric variables measurement Euclidean distance

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