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7th IEEE International Conference on Electronics Information and Emergency Communication (ICEIEC)

作者： Zhang, Can Yan, Yi Univ Chinese Acad Sci Sch Elect Elect & Commun Engn Beijing 101408 Peoples R China

ISBN: (纸本)9781509030255

In order to improve the error resistance and security of JPEG2000 standard, a joint source channel and security arithmetic coding/decoding scheme for EBCOT in JPEG2000 is proposed. Based on error resistant arithmetic coding, this scheme inserts multiple forbidden symbols and generates secure two-way decodable bitstream controlled by chaotic maps, improving the security of the scheme. Meanwhile, at the decoder, the scheme combines soft and hard decoding together with threshold control and two-way decoding is adopted to improve the error-correcting capability. Simulation results show that the proposed scheme can achieve lower decoding complexity, better error resistance and security.

关键词： joint coding/decoding EBCOT chaotic map two-way decoding

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joint source channel VL coding/decoding for deep space communication networks based on a space trellis

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Science China(Information Sciences) 2011年第9期54卷 1883-1894页

作者： WU WeiRen 1,TU Juan 2,TU GuoFang 1,GAO ShaoShuai 1 & ZHANG Can 1,3 1 School of Information Science and Engineering,Graduate University of Chinese Academy of Sciences,Beijing 100049,China 2 Beijing Institute of Electronic System Engineering,China Aerospace Science & Industry Corp.,Beijing 100854,China 3 State Key Laboratory of Information Security,Graduate University of Chinese Academy of Science,Beijing 100049,China 1. School of Information Science and Engineering Graduate University of Chinese Academy of Sciences Beijing 100049 China2. Beijing Institute of Electronic System Engineering China Aerospace Science & Industry Corp. Beijing 100854 China3. State Key Laboratory of Information Security Graduate University of Chinese Academy of Science Beijing 100049 China

This paper presents joint source channel variable length (VL) coding/decoding based on a space *** constructing a joint decoding plane trellis,better decoding performance can be achieved than by using the bit-level decoding ***,the plane trellis is complicated,which results in high decoding complexity for decoding VL turbo *** solve this problem,we construct a space trellis and design a low-complexity joint decoding algorithm with a variable length symbol-a posteriori probability (VLS-APP) algorithm in resource constrained deep space communication *** results show that the proposed approach reduces the decoding complexity by 10% compared with the plane trellis,and the gain of Eb/N0 is about 0.2 dB at SER=***,it provides substantial error protection for variable-length encoded image data.

关键词： joint coding/decoding VL turbo codes space trellis VLS-APP

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