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In this paper, an improved soft in soft out (SISO) iterative decoding scheme for joint source-channel coding is presented. It is realized as the iterative soft decoding of arithmetic code based on sequential decoding to successively prune the decoding tree. Making use of the forecasted forbidden symbols, an error-resistant arithmetic code with an improved a posteriori probability (APP) metric is adopted...
We propose an improved error correction technique for arithmetic coding. By forecasting the forbidden symbols, the effective forbidden region is expanded and a better error correction performance is achieved. A generalized stack algorithm is employed to detect the forbidden symbol beforehand and the maximum a posteriori (MAP) metric is adopted to preserve the most probable decoding paths in the stack...
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