Results 121 to 130 of about 169 (158)
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On unequal error protection using convolutional codes
Signal Processing, 1999zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Rudolph Brissett, Janak Sodha
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Quaternary Unequal Error Protection Codes
2008We consider codes that offer unequal error protection to different information symbols, as measured by the so-called separation vector (a generalisation of the minimum Hamming distance). We determine the parameters of all optimal linear quaternary codes of length at most eleven.
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Cyclic codes with unequal error protection (Corresp.)
IEEE Transactions on Information Theory, 1971This paper shows that, although systematic cyclic codes have equal error protection for all information digits, there exist non-systematic cyclic codes that can provide unequal error protection for the information digits; that is, at least one information digit is protected for a number of errors that is larger than the number guaranteed by the minimum
Willis C. Gore, Charles C. Kilgus
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On the Unequal Error Protection for Progressive Image Transmission
IEEE Transactions on Image Processing, 2007In this paper, we consider the unequal error protection (UEP) for progressive image transmission when the coded packet size is fixed. First, we prove that, for the source code with convex rate-distortion (R-D) function and practically used channel codes, the channel code rate for each packet in the optimal rate allocation is nondecreasing indeed. Then,
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Embedding unequal error protection into turbo codes
Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256), 2001A technique to embody unequal error protection into turbo codes is presented. Through proper optimization of the turbo codes interleaver, different levels of error protection can be accommodated within the same encoded block. The effectiveness of the proposed approach is demonstrated in the case of transmission of JPEG2000 coded images across an AWGN ...
GRANGETTO, MARCO +2 more
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Turbo Coded Modulation for Unequal Error Protection
IEEE Transactions on Communications, 2008A major concern in designing communication systems is to maintain quality of service for a wide range of channel conditions. This is an important issue particularly for the applications where precise characterization of the channel is impossible. For such applications, the source data can be classified into several classes and Unequal Error Protection (
Mehmet Aydinlik, Masoud Salehi
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Parallel concatenated codes with unequal error protection
IEEE Transactions on Communications, 1998Summary: We show how parallel concatenated codes (PCC's, also known as turbo codes) can be endowed with unequal error protection (UEP). Given the two component encoders of the PCC encoder and the desired interleaver size, UEP is achieved by: 1) suitably positioning the different importance classes of information symbols into the encoder input frame; 2)
Giuseppe Caire, Ezio Biglieri
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On unequal error protection for LZSS compressed data
annals of telecommunications - annales des télécommunications, 2009An unequal error protection scheme for Lempel–Ziv–Storer–Szymanski (LZSS) compressed data is proposed. The novel method divides the compressed data into short blocks, which allows for near-real-time operation. The error protection is obtained through the application of BCH codes and block interleavers. Compared to other methods found in the literature,
Richard Demo Souza +2 more
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A Flexible Macroblock Scheme for Unequal Error Protection
2006 International Conference on Image Processing, 2006This paper proposes an enhanced error protection scheme using flexible macroblock ordering in H.264/AVC. The algorithm uses a two-phase system. In the first phase, the importance of every macroblock is calculated based on its influence on the current frame and future frames.
Yves Dhondt +2 more
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Canonical convolutional encoders for unequal error protection
2008 IEEE International Symposium on Information Theory, 2008In this paper, canonical convolutional encoders are studied for unequal error protection (UEP) from an algebraic theoretical viewpoint. We show that for any convolutional code there exists at least a canonical generator matrix which has the greatest separation vector, and hence the optimal UEP capability, among all canonical ones.
Chung-Hsuan Wang, Chi-Chao Chao
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