We propose a new Minimum Mean Square Error (MMSE) estimator, which is able to exploit both intra- and inter-frame correlation of source codec parameters. Simulations, which were performed with realistic parameter corr...
详细信息
We propose a new Minimum Mean Square Error (MMSE) estimator, which is able to exploit both intra- and inter-frame correlation of source codec parameters. Simulations, which were performed with realistic parameter correlations, show SNR gains of up to 8 dB.
An improved method to construct t-EC/AUED (t error-correcting and all unidirectional error detecting codes) is presented. In many cases, the new method matches or improves the best known t-EC/AUED codes. Furthermore, ...
详细信息
An improved method to construct t-EC/AUED (t error-correcting and all unidirectional error detecting codes) is presented. In many cases, the new method matches or improves the best known t-EC/AUED codes. Furthermore, the construction does not require complementation of code words except the all zero and the all ones words. So, this method is also superior to the previous techniques when the code parameters are the same.
This paper analyzes several aspects of erasure correction in the decoding of Reed-Solomon (RS) codes over the q-ary Erasure Channel. It is shown, that by limiting the maximum number of erasures the decoder is allowed ...
详细信息
This paper analyzes several aspects of erasure correction in the decoding of Reed-Solomon (RS) codes over the q-ary Erasure Channel. It is shown, that by limiting the maximum number of erasures the decoder is allowed to correct, a significant improvement in the probability of undetected error is obtained, at relatively high channel erasure and low channel transition probabilities. Of particular interest is the errata pattern with the maximum number of erasures the RS code can correct and at least one error, which always causes an undetected error in an incomplete decoder. This 'limited erasures' approach is compared with the 'readable erasures' method [1], [2]. This approach is also analyzed for concatenated codes using an RS code as the outer code.
In coding theory, Bose-Chaudhuri-Hocquenghem (BCH) codes possess an excellent error correction capability, which allows them to become crucial for use in communication and storage systems. However, non-primitive BCH c...
详细信息
Decoding algorithms with reliability information are of considerable interest in error control coding. Such information when available and when properly used increases the error correcting capability of the decoder. I...
详细信息
ISBN:
(纸本)0780320158
Decoding algorithms with reliability information are of considerable interest in error control coding. Such information when available and when properly used increases the error correcting capability of the decoder. In this paper we find decoding algorithms that use soft decision with optimal error correcting capability for fixed constraints on decoder complexity.
A new code capable of correcting a single asymmetric error is proposed. This code is of length 19 and has 28142 codewords, improving the best known code by 110 code words.
A new code capable of correcting a single asymmetric error is proposed. This code is of length 19 and has 28142 codewords, improving the best known code by 110 code words.
A new error concealment algorithm for packet video, effectively eliminating error propagation effects is presented. The algorithm adopts a one pixel block overlap coding structure to solve the error propagation proble...
详细信息
A new error concealment algorithm for packet video, effectively eliminating error propagation effects is presented. The algorithm adopts a one pixel block overlap coding structure to solve the error propagation problem. Experimental results show that the method can have good error concealment results when the damaged frame loses all DCT coefficients.
A method of providing error protection for (d,k) constrained sequences is examined. The cases of single error detection and single error correction are considered, where the single error is allowed to be a shift error...
详细信息
A method of providing error protection for (d,k) constrained sequences is examined. The cases of single error detection and single error correction are considered, where the single error is allowed to be a shift error or a symmetric error. Codes for single error detection and for single error correction are constructed by inserting parity blocks into the (d,k) constrained sequence. Bounds are considered on the length of the parity blocks for single error detection and for single error correction.
An analytical method for evaluating performance data of algebraically decoded linear unequal error protection codes used on burst error channels is presented. Position-related performance data are introduced to charac...
详细信息
An analytical method for evaluating performance data of algebraically decoded linear unequal error protection codes used on burst error channels is presented. Position-related performance data are introduced to characterize the decoding events with regard to assessing the error protection level attached to each code word position. The method is based on an automata model of the channel-decoder-cascade described by a compound automaton. The decoder is considered to be a deterministic evaluation device visualized by a code trellis. To investigate the error protection level at a fixed code word position, the trellis is dissected into two trellises corresponding to that position. The performance analysis can be performed in a transform domain. The position-related transform coefficients are connected with the position-related coset probabilities by a Walsh-Hadamard-Transformation.
作者：
Papaharalabos, S.Sweeney, P.Evans, B.G.
University of Surrey Guildford Surrey GU2 7XH United Kingdom CCSR
Department of Electronic Engineering University of Surrey Guildford Surrey GU2 7XH United Kingdom
In this paper two normalization methods are considered to improve the performance of the iterative soft output Viterbi algorithm (SOVA). This is mainly because of the nature of the SOVA, which is a sub-optimum algorit...
详细信息
暂无评论