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Information loss recovery for JPEG2000 image transmission in an error-prone environment

Journal of Harbin Institute of Technology(New Series) 2008年第3期15卷 430-435页

作者：刘洁瑜张德运 School of Electronics and Information Engineering Xi'an Jiaotong University

Information loss recovery techniques are important for transmitting images over error-prone channels at the decoder. A novel error recovery scheme for JPEG2000 image is presented in this paper, which adopts different techniques for the lowest frequency coefficients and high frequency coefficients in the wavelet domain. The low-frequency recovery algorithm was implemented by adopting the watermarking technique and the packet structure of JPEG2000. The low-frequency eoefficients taken as the hidden data were extracted from the compressed bit stream, and then were embedded back into the bit stream itself prior to transmission. The embedded data were used to recover the information loss. High-frequency reconstruction was performed in bitplane base. The damaged bitplanes were recovered according to the correlation in the wavelet subband structure and by using the algorithm based on the horizontal and vertical edge detection. Experiments verified the effectiveness of these algorithms.

关键词： JPEG2000 error recovery image transmission bitplane

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An error Recoverable Structure Based on Complementary Logic and Alternating-Retry

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Journal of Computer Science & Technology 2005年第6期20卷 885-894页

作者：江建慧 Department of Computer Science and Technology Tongji University Shanghai 200092 P.R. China

Modern VLSI circuits provide adequate on-chip resources. So that online testing and retry integrated into a chip are absolutely necessary for system-on-a-chip technology. This paper firstly proposes a general online testing plus retrying structure. Obviously, although retry can mask transient or intermittent faults, it is useless for handling permanent faults generally. To solve this problem, this paper presents a novel dual modular redundancy （DMR） structure using complementary logic--alternating-complementary logic （CL-ACL） switching mode. During error-free operation, the CL-ACL structure operates by complementary logic mode. After an error is detected, it retries by alternating logic mode. If all errors belong to single or multiple temporary 0/1-error or stuck-at-error produced by one module, then these errors can be corrected effectively. The results obtained from the simulation validate the correctness of the CL-ACL structure. Analytic results show that the delay of the CL-ACL structure is dramatically less than that of a DMR structure using alternating-complementary logic mode.

关键词： error recovery fault tolerance complementary logic alternating-retry temporary error stuck-at-error

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Moving Least Squares Interpolation Based A-Posteriori error Technique in Finite Element Elastic Analysis

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Computer Modeling in Engineering & Sciences 2021年第10期129卷 167-189页

作者： Mohd Ahmed Devender Singh Saeed Al Qadhi Nguyen Viet Thanh Civil Engineering Department College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia Ministry of Information Soochna BhavanCGO ComplexDelhi110003India Urban Transport&Coastal Engineering Department University of Transport and CommunicationsHanoi100000Vietnam

The performance of a-posteriori error methodology based on moving least squares(MLS)interpolation is explored in this paper by varying the finite element error recovery parameters,namely recovery points and field variable derivatives *** MLS interpolation based recovery technique uses the weighted least squares method on top of the finite element method’s field variable derivatives solution to build a continuous field variable derivatives *** boundary of the node support(mesh free patch of influenced nodes within a determined distance)is taken as circular,i.e.,circular support domain constructed using radial weights is *** field variable derivatives(stress and strains)are recovered at two kinds of points in the support domain,i.e.,Gauss points(super-convergent stress locations)and nodal *** errors are computed as the difference between the stress from the finite element results and projected stress from the post-processed energy norm at both elemental and global *** benchmark numerical tests using quadrilateral and triangular meshes measure the finite element errors in strain and stress *** numerical examples showed the support domain-based recovery technique’s capabilities for effective and efficient error estimation in the finite element analysis of elastic *** MLS interpolation based recovery technique performs better for stress extraction at Gauss points with the quadrilateral discretization of the problem *** is also shown that the behavior of the MLS interpolation based a-posteriori error technique in stress extraction is comparable to classical Zienkiewicz-Zhu(ZZ)a-posteriori error technique.

关键词： recovery points field variable derivatives effectivity error recovery support domain error convergence

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Adaptive efficient video transmission over the Internet based on congestion control and RS coding

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Science in China(Series F) 2002年第2期45卷 121-129页

作者：黄伟红张福炎孙正兴 State Key Laboratory for Novel Software Technology Department of Computer Science and Technology Nanjing University Nanjing 210093 China

An approach based on adaptive congestion control and adaptive error recovery with RS (Reed-Solomon) coding method is presented for efficient video transmission over the Internet. Featured by weighted moving average rate control and TCP-friendliness, AVSP, a novel adaptive video streaming protocol, is designed with adjustable rate control parameters so as to respond quickly to the QoS status fluctuation during video transmission over the Internet. Combined with congestion control policy, an adaptive RS coding error recovery scheme with variable parameters is presented to enhance the robustness of MPEG video transmission over the Internet with restriction to the total system bandwidth .

关键词： video transmission congestion control error recovery Reed-Solomon coding.

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Spatial error Concealment Algorithm Based On Improved SUSAN Operator

Spatial Error Concealment Algorithm Based On Improved SUSAN ...

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2010 International Conference on Computer and Communication Technologies in Agriculture Engineering (CCTAE 2010)

作者： Xiaoyue LIU College of Computer and Automatic Control Hebei Polytechnic University Tangshan Hebei China Weijian CONG College of Computer and Automatic Control Hebei Polytechnic University Tangshan Hebei China

In the transmission of real-time video compressed streams,error concealment method is to restore the damaged or lost data *** paper improves the existing spatial error concealment algorithm based on SUSAN detection *** the one hand,as recovering the error,the detection pixels were reduced by considering the relationship of nearby *** the other hand,more associated pixels were fully *** experimental results show that the proposed algorithm enhances the Peak Signal to Noise Ratio in the case of reducing 4%-8% computational complexity,and is more beneficial to real-time application.

关键词： SUSAN operator error recovery edge detection gray value

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