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error detection using mode information of macroblocks for video transmission

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Chinese Optics Letters 2005年第10期3卷 582-584页

作者：方勇吴成柯朱红 National Key Laboratory on ISN Xidian University Xi'an 710071

A new method for error detection using mode information of macroblocks （MBs） is proposed. For decodable inter MBs, inter residues are calculated by adding up absolute values of received residual pixels and intra complexities are estimated by that of motion compensated reference blocks. If inter residues are larger than intra complexities by a predefined quantity, MBs are considered to be erroneous. For decodable intra MBs, the connective smoothness of the current MB with correctly decoded neighboring MBs is tested to find erroneous MBs. Combined with error concealment, the new method improves the quality of reconstructed images by about 0.5-1 dB in peak signal-noise ratio （PSNR）.

关键词： Decoding error detection Image reconstruction Light transmission Motion compensation Signal to noise ratio

error detection CAPABILITY OF SHORTENED HAMMING CODES AND THEIR DUAL CODES

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Acta Mathematicae Applicatae Sinica 2000年第3期16卷 292-298页

作者：夏树涛符方伟 School of Mathematical Science Nankai University Tianjin China

The undetected error probability and error detection capability of shortened Hamming codes and their dual codes are studied in this paper. We also obtain some interesting properties for the shortened Simplex codes.

关键词： error detection undetected error probability hamming codes simplex codes combinatorial codes

Multi-Level error detection and Concealment Algorithm to Improve Speech Quality in GSM Full Rate Speech Codecs

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Tsinghua Science and Technology 2011年第3期16卷 247-255页

作者：王林芳刘加刘小青李明 Department of Electronic Engineering Tsinghua University

Digital mobile telecommunication systems, such as the global system for mobile （GSM） system, want to further improve speech communication quality without changing the channel encoders and decoders. Speech quality is most affected by residual bit errors in received speech frames. Conventional methods use binary decision strategies for error detection and concealment in frames. This paper presents a multi-level error detection and concealment algorithm for GSM full rate speech codec systems. The algorithm uses multi-source knowledge to detect and conceal speech frame errors at the frame, parameter, and even bit levels. Tests show that most corrupted frames can be appropriately concealed by this algorithm, resulting in MOS gains of more than 50% for real-world data tests.

关键词： speech coding error detection error concealment speech quality global system for mobile (GSM)

A Low Power error detection in the Syndrome Calculator Block for Reed-Solomon Codes: RS(204,188)

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Tsinghua Science and Technology 2009年第4期14卷 474-477页

作者： Richard Huynh 葛宁杨华中 Department of Electronic Engineering Tsinghua University

Reed-Solomon （RS） codes have been widely adopted in many modern communication systems. This paper describes a new method for error detection in the syndrome calculator block of RS decoders. The main feature of this method is to prove that it is possible to compute only a few syndrome coeffi- cients -- less than half-- to detect whether the codeword is correct. The theoretical estimate of the prob- ability that the new algorithm failed is shown to depend on the number of syndrome coefficients computed. The algorithm is tested using the RS（204,188） code with the first four coefficients. With a bit error rate of 1 ~ 104, this method reduces the power consumption by 6% compared to the basic RS（204,188） decoder. The error detection algorithm for the syndrome calculator block does not require modification of the basic hardware implementation of the syndrome coefficients computation. The algorithm significantly reduces the computation complexity of the syndrome calculator block, thus lowering the power needed.

关键词： Reed-Solomon codes syndrome calculator block error detection bit error rate

On error detection of Intermediate Nodes Offour-Node Network with Small Downstream Links

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Wuhan University Journal of Natural Sciences 2015年第1期20卷 39-46页

作者： YANG Yanbo CAI Feng GUO Wangmei State Key Laboratory of Interagrated Services Networks Xidian University

We investigate the error detection ability of intermedi- ate nodes of zig-zag network with small downstream link. We show that the error detection capability of zig-zag networks in the presence of z malicious edges and 2z-1 limited links from node B to node u. Also, at last we analyze a family of networks, which shows that the upper bound of network is smaller than the bound we expected, indicating that Singleton bound is not the tightest bound in the particular condition of network. According to this result, we design corresponding encode and decode strategy to reach the bound we propose in this paper.

关键词： network coding error detection unequal capacities upper bound

Synchronizing focus error detection of dual-pickup heads in a multi-layer data storage system

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Frontiers of Optoelectronics 2008年第Z1期1卷 183-187页

作者： Zhaolong SHEN Bing JIANG Jianwen CAI Min XU Wenhao HUANG Precise Machinery and Precise Instrument Department University of Science and Technology of China

To implement a dual-pickup-head multi-layer data storage system, it is necessary to measure the synchronizing focus error of the two pickup heads to validate the feasibility of the focus servo method. By using the ABCD transforming matrix method of geometric optics, we calculate the relationship between the output energy and the space interval of the two *** confirming the detection system working in the linear area, the voice coil motors of the two pickup heads were driven by sine signals with different frequencies and recorded the output signals of the quadrant photodetector under different movement states respectively,including static, lower pickup head movement and dualpickup-head synchronizing movement. The synchronizing focus error, which is caused by the characteristic parameter mismatch of the two pickup heads, could be obtained through frequency-domain analysis of these output signals. The experimental result shows that the amplitude of synchronizing focus error under 20 Hz is less than 1 μm, which could adequately satisfy the focus servo requirement of the multi-layer data storage system.

关键词： three-dimensional optical data storage error detection optical pickup head coil motor focus servo

A Practical Comparison between Signature Approach and Other Existing Approaches in error detection over TCP

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Communications and Network 2016年第1期8卷 31-38页

作者： Mohammed J. Bawaneh Mahmud S. Alkoffash Shihadeh Alqrainy Hasan Muaidi Department of Information Technology Al-Huson Polytechnic Al-Balqa Applied University Al-Salt Jordan Prince Abdullah Bin Gazi Faculty of Information Technology Al-Balqa Applied University Al-Salt Jordan

error coding is suited when the transmission channel is noisy. This is the case of wireless communication. So to provide a reliable digital data transmission, we should use error detection and correction algorithms. In this paper, we constructed a simulation study for four detection algorithms. The first three methods—hamming, LRC, and parity are common techniques in networking while the fourth is a proposed one called Signature. The results show that, the hamming code is the best one in term of detection but the worst one in term of execution time. Parity, LRC and signature have the same ability in detecting error, while the signature has a preference than all others methods in term of execution time.

关键词： error detection error Control Simulator Packet Size detection Algorithms Signature detection

A New Method of error detection in SPIHT Coded Images

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A New Method of Error Detection in SPIHT Coded Images

Macro Block Byte Boundary Ending error detection Method for error Concealment

2012年计算机应用与系统建模国际会议

作者： Liu Ling Zhang Xinghui Liang Wei School of Information Technology Engineering Tianjin University of Technology and Education TUTE

In this paper we propose a novel approach based on pieces of information detection in order to improve the error detection efficiency and accuracy of the set partitioning in hierarchical trees (SPIHT) algorithm. The erroneous block whose parameter is greater than the threshold is dealt with error concealment according to error concealment neighbor way. The simulation results show that the algorithm is simple, and can effectively find the errors. Comparing with the method without error detection and concealment, the decoder PSNR of reconstructed image has improved 0.3-1.1dB.

关键词： SPIHT error detection

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Macro Block Byte Boundary Ending Error Detection Method for ...