Prof. Chang Wen Chen Profile

Prof. Chang Wen Chen

Distinguished Professor at Univ at Buffalo

SPIE Involvement:

Author

Publications (81)

Proceedings Article | 26 September 2013 Paper

Low-delay cloud-based rendering of free viewpoint video for mobile devices

Dan Miao, Wenwu Zhu, Chang Wen Chen

Proceedings Volume 8856, 88560C (2013) https://doi.org/10.1117/12.2023177

KEYWORDS: Mobile devices, Clouds, Video, Switching, Video compression, Visualization, Switches, 3D vision, 3D image processing, Virtual colonoscopy

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Proceedings Article | 5 August 2010 Paper

A deadline-aware transmission framework for H.264/AVC video over IEEE 802.11e EDCA wireless networks

Jianchao Du, Chang Wen Chen

Proceedings Volume 7744, 77441J (2010) https://doi.org/10.1117/12.863501

KEYWORDS: Video, Receivers, Video coding, Multimedia, Associative arrays, Transmitters, Actinium, Network architectures, Lithium

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Proceedings Article | 5 August 2010 Paper

Hybrid bit-stream rewriting from scalable video coding to H.264/AVC

Bin Li, Yi Guo, Houqiang Li, Chang Wen Chen

Proceedings Volume 7744, 77441A (2010) https://doi.org/10.1117/12.863351

KEYWORDS: Scalable video coding, Spatial resolution, Computer programming, Video, Quantization, Lithium, Silicon, Matrices, Visual communications, Image processing

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Proceedings Article | 5 August 2010 Paper

An adaptive approach to human motion tracking from video

Lifang Wu, Chang Wen Chen

Proceedings Volume 7744, 77441O (2010) https://doi.org/10.1117/12.863480

KEYWORDS: Motion models, Detection and tracking algorithms, 3D modeling, Head, Image analysis, Video, Cameras, Visual process modeling, Algorithm development, Motion analysis

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Proceedings Article | 15 July 2010 Paper

Joint trilateral filtering for depth map compression

Shujie Liu, PoLin Lai, Dong Tian, Cristina Gomila, Chang Wen Chen

Proceedings Volume 7744, 77440F (2010) https://doi.org/10.1117/12.863341

KEYWORDS: Video, Video compression, Video coding, 3D video compression, Image filtering, Transform theory, Image compression, Electronic filtering, Nonlinear filtering, Gaussian filters

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Proceedings Article | 2 May 2008 Paper

IDMA: improving the defense against malicious attack for mobile ad hoc networks based on ARIP protocol

Chaorong Peng, Chang Wen Chen

Proceedings Volume 6982, 698208 (2008) https://doi.org/10.1117/12.783063

KEYWORDS: Defense and security, Network security, Floods, Network architectures, Receivers, Algorithm development, Information security, Computer intrusion detection, Computer security, Computer engineering

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Malicious nodes are mounting increasingly sophisticated attacking operations on the Mobile Ad Hoc Networks (MANETs). This is mainly because the IP-based MANETs are vulnerable to attacks by various malicious nodes. However, the defense against malicious attack can be improved when a new layer of network architecture can be developed to separate true IP address from disclosing to the malicious nodes. In this paper, we propose a new algorithm to improve the defense against malicious attack (IDMA) that is based on a recently developed Assignment Router Identify Protocol (ARIP) for the clustering-based MANET management. In the ARIP protocol, we design the ARIP architecture based on the new Identity instead of the vulnerable IP addresses to provide the required security that is embedded seamlessly into the overall network architecture. We make full use of ARIP's special property to monitor gateway forward packets by Reply Request Route Packets (RREP) without additional intrusion detection layer. We name this new algorithm IDMA because of its inherent capability to improve the defense against malicious attacks. Through IDMA, a watching algorithm can be established so as to counterattack the malicious node in the routing path when it unusually drops up packets. We provide analysis examples for IDMA for the defense against a malicious node that disrupts the route discovery by impersonating the destination, or by responding with state of corrupted routing information, or by disseminating forged control traffic. The IDMA algorithm is able to counterattack the malicious node in the cases when the node lunch DoS attack by broadcast a large number of route requests, or make Target traffic congestion by delivering huge mount of data; or spoof the IP addresses and send forge packets with a fake ID to the same Target causing traffic congestion at that destination. We have implemented IDMA algorism using the GloMoSim simulator and have demonstrated its performance under a variety of operational conditions.

Proceedings Article | 10 September 2007 Paper

H.264 scalable video over finite-state Markov chain wireless channels

Guogang Hua, Daewon Song, David Hench, Chang Wen Chen

Proceedings Volume 6777, 677702 (2007) https://doi.org/10.1117/12.748662

KEYWORDS: Video, Scalable video coding, Error analysis, Forward error correction, Video coding, Computer programming, Video processing, Statistical modeling, Performance modeling, Data compression

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Proceedings Article | 26 February 2007 Paper

Novel layered scalable video coding transmission over MIMO wireless systems with partial CSI and adaptive channel selection

Daewon Song, Chang Wen Chen

Proceedings Volume 6507, 65070R (2007) https://doi.org/10.1117/12.705680

KEYWORDS: Video, Signal to noise ratio, Scalable video coding, Receivers, Transmitters, Signal detection, Antennas, Error analysis, Modulation, Forward error correction

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Proceedings Article | 29 January 2007 Paper

Progressive image transmission with RCPT protection

Lei Yao, Lei Cao, Chang Wen Chen

Proceedings Volume 6508, 650826 (2007) https://doi.org/10.1117/12.703675

KEYWORDS: Error control coding, Image transmission, Distortion, Image quality, Image compression, Remote sensing, Computer programming, Forward error correction, Optimization (mathematics), Error analysis

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Proceedings Article | 29 January 2007 Paper

Distributed video coding based on constrained rate adaptive low density parity check codes

Rong Ke Liu, Guo Gang Hua, Chang Wen Chen

Proceedings Volume 6508, 65080R (2007) https://doi.org/10.1117/12.701060

KEYWORDS: Computer programming, Video coding, Video, Error control coding, Data compression, Video compression, Motion estimation, Video surveillance, Error analysis, Forward error correction

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Proceedings Article | 29 January 2007 Paper

Dynamic GOP structure for scalable video coding

Haksoo Kim, Chang Wen Chen

Proceedings Volume 6508, 65082R (2007) https://doi.org/10.1117/12.705276

KEYWORDS: Scalable video coding, Video, Video coding, Silver, Wavelets, Standards development, Computer programming, Video compression, Quantization, Electronic filtering

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Proceedings Article | 12 May 2006 Paper

Intelligent routing protocol for ad hoc wireless network

Chaorong Peng, Chang Wen Chen

Proceedings Volume 6248, 62480R (2006) https://doi.org/10.1117/12.665681

KEYWORDS: Receivers, Amplitude shift keying, Data communications, Roentgenium, Internet, Wireless communications, Multimedia, Automatic control, Mobile communications, RF communications

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A novel routing scheme for mobile ad hoc networks (MANETs), which combines hybrid and multi-inter-routing path properties with a distributed topology discovery route mechanism using control agents is proposed in this paper. In recent years, a variety of hybrid routing protocols for Mobile Ad hoc wireless networks (MANETs) have been developed. Which is proactively maintains routing information for a local neighborhood, while reactively acquiring routes to destinations beyond the global. The hybrid protocol reduces routing discovery latency and the end-to-end delay by providing high connectivity without requiring much of the scarce network capacity. On the other side the hybrid routing protocols in MANETs likes Zone Routing Protocol still need route "re-discover" time when a route between zones link break. Sine the topology update information needs to be broadcast routing request on local zone. Due to this delay, the routing protocol may not be applicable for real-time data and multimedia communication. We utilize the advantages of a clustering organization and multi-routing path in routing protocol to achieve several goals at the same time. Firstly, IRP efficiently saves network bandwidth and reduces route reconstruction time when a routing path fails. The IRP protocol does not require global periodic routing advertisements, local control agents will automatically monitor and repair broke links. Secondly, it efficiently reduces congestion and traffic "bottlenecks" for ClusterHeads in clustering network. Thirdly, it reduces significant overheads associated with maintaining clusters. Fourthly, it improves clusters stability due to dynamic topology changing frequently. In this paper, we present the Intelligent Routing Protocol. First, we discuss the problem of routing in ad hoc networks and the motivation of IRP. We describe the hierarchical architecture of IRP. We describe the routing process and illustrate it with an example. Further, we describe the control manage mechanisms, which are used to control active route and reduce the traffic amount in the route discovery procedure. Finial, the numerical experiments are given to show the effectiveness of IRP routing protocol.

Proceedings Article | 10 May 2006 Paper

Information-aware collaborative routing in wireless sensor network

Ji Sun Lee, Chang Wen Chen

Proceedings Volume 6201, 62010B (2006) https://doi.org/10.1117/12.666586

KEYWORDS: Head, Sensors, Data communications, Sensor networks, Data analysis, Data transmission, Computer simulations, Energy efficiency, Electronics, Amplifiers

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Proceedings Article | 10 May 2006 Paper

An adaptive distributed data aggregation based on RCPC for wireless sensor networks

Guogang Hua, Chang Wen Chen

Proceedings Volume 6201, 62010D (2006) https://doi.org/10.1117/12.666548

KEYWORDS: Sensor networks, Data compression, Sensors, Error control coding, Computer programming, Data communications, Forward error correction, Wireless communications, Energy efficiency, Data transmission

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Proceedings Article | 2 May 2006 Paper

Robust image transmission over MIMO space-time coded wireless systems

Daewon Song, Chang Chen

Proceedings Volume 6250, 62500I (2006) https://doi.org/10.1117/12.665904

KEYWORDS: Antennas, Forward error correction, Wavelets, Image transmission, Wave propagation, Receivers, Image compression, Signal detection, Computer programming, Multimedia

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Proceedings Article | 10 February 2006 Paper

A novel fast inter-prediction mode decision for H.264/AVC

Yi Guo, Houqiang Li, Shibao Pei, Changwen Chen

Proceedings Volume 6074, 607402 (2006) https://doi.org/10.1117/12.654806

KEYWORDS: Motion estimation, Video coding, Computer programming, Video, Distortion, Standards development, Video compression, Multimedia, Mobile devices, Lithium

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Proceedings Article | 25 October 2005 Paper

Video coding based on overcomplete motion compensated temporal filtering and EREC for robust transmission

Haifeng Zheng, Lun Yu, Chang Wen Chen

Proceedings Volume 6015, 601509 (2005) https://doi.org/10.1117/12.633540

KEYWORDS: Video, Video coding, Wavelets, Video compression, Motion estimation, Scalable video coding, Visualization, Error analysis, Signal to noise ratio, Discrete wavelet transforms

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Proceedings Article | 25 October 2005 Paper

MAP decoding of variable length codes over noisy channels

Lei Yao, Lei Cao, Chang Wen Chen

Proceedings Volume 6015, 60150L (2005) https://doi.org/10.1117/12.630926

KEYWORDS: Binary data, Detection and tracking algorithms, Electrical engineering, Data compression, Forward error correction, Data communications, Multimedia, Computer programming, Distortion, Signal to noise ratio

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Proceedings Article | 25 October 2005 Paper

A fast content-adaptive spatial error concealment for wireless video communication

Ye Yu, JianHua Lu, JunLi Zheng, Changwen Chen

Proceedings Volume 6015, 60150H (2005) https://doi.org/10.1117/12.634348

KEYWORDS: Error analysis, Video, Wireless communications, Image quality, Image restoration, Video compression, Visualization, Mathematical modeling, Computer simulations, Forward error correction

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Proceedings Article | 25 October 2005 Paper

An improved spatio-temporal video error concealment algorithm using partial differential equation

Yang Hu, Yan Chen, Houqiang Li, Chang Wen Chen

Proceedings Volume 6015, 60150G (2005) https://doi.org/10.1117/12.634342

KEYWORDS: Error analysis, Video, Anisotropic diffusion, Visualization, Radon, Partial differential equations, Video compression, Multimedia, Forward error correction, Reconstruction algorithms

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Proceedings Article | 24 June 2005 Paper

Robust video transmission based on multiple description scalable coding with EREC

Haifeng Zheng, Lun Yu, Chang Wen Chen

Proceedings Volume 5960, 59605J (2005) https://doi.org/10.1117/12.633197

KEYWORDS: Video, Scalable video coding, Wavelets, Error analysis, Video coding, Video compression, Image compression, Algorithm development, Motion estimation, Spatial resolution

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Proceedings Article | 24 June 2005 Paper

Constant quality constrained bit allocation for leaky prediction based FGS video streaming

Jianhua Wu, Jianfei Cai, Chang Wen Chen

Proceedings Volume 5960, 59606G (2005) https://doi.org/10.1117/12.633507

KEYWORDS: Video, Distortion, Computer programming, Video coding, Scalable video coding, Computer engineering, Receivers, Multimedia, Wireless communications, Internet

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Proceedings Article | 2 June 2005 Paper

An energy-efficient media access control protocol for chain-type wireless sensor networks

Yu Wang, Chang Wen Chen

Proceedings Volume 5819, (2005) https://doi.org/10.1117/12.605387

KEYWORDS: Sensor networks, Sensors, Data communications, Data transmission, Energy efficiency, Network architectures, Tin, Head, Wireless communications, Signal processing

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Proceedings Article | 2 June 2005 Paper

Application-specific routing scheme for indoor wireless localization systems

Tamas Kasza, Chang Chen

Proceedings Volume 5819, (2005) https://doi.org/10.1117/12.606706

KEYWORDS: Curium, Telecommunications, Reliability, Antennas, Wireless communications, Sensor networks, Transceivers, Data communications, Data modeling, Sensors

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Proceedings Article | 20 May 2005 Paper

A chain-type wireless sensor network for monitoring long range infrastructures

Chang Wen Chen, Yu Wang, Ivica Kostanic

Proceedings Volume 5778, (2005) https://doi.org/10.1117/12.604964

KEYWORDS: Sensor networks, Sensors, Network architectures, Data communications, Head, Tin, Data modeling, Efficient operations, RF communications, Wireless communications

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Proceedings Article | 14 March 2005 Paper

Visualization of medical images over mobile wireless handheld devices

Min Wu, Khurana Ashish, Nadar Mariappan, Chang Wen Chen

Proceedings Volume 5684, (2005) https://doi.org/10.1117/12.591835

KEYWORDS: Image compression, Visualization, Image visualization, Mobile devices, Image transmission, Medical imaging, Image processing, Visual compression, Forward error correction, Wireless communications

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Proceedings Article | 14 March 2005 Paper

A novel multiple description scalable coding scheme for mobile wireless video transmission

Haifeng Zheng, Lun Yu, Chang Wen Chen

Proceedings Volume 5684, (2005) https://doi.org/10.1117/12.592891

KEYWORDS: Video, Wavelets, Video coding, Scalable video coding, Error analysis, Motion estimation, Discrete wavelet transforms, Visualization, Video compression, Data compression

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Proceedings Article | 14 March 2005 Paper

Multiple description distributed image coding with side information for mobile wireless transmission

Min Wu, Daewon Song, Chang Wen Chen

Proceedings Volume 5685, (2005) https://doi.org/10.1117/12.597084

KEYWORDS: Wavelets, Computer programming, Image compression, Remote sensing, Receivers, Quantization, Distortion, Wave propagation, Data compression, Error control coding

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