Joint source-channel decoding of variable-length codes for convolutional codes and turbo codes |
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Authors: | Jeanne M Carlach J-C Siohan P |
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Affiliation: | R&D Div. of France Telecom, Cesson Sevigne, France; |
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Abstract: | Several recent publications have shown that joint source-channel decoding could be a powerful technique to take advantage of residual source redundancy for fixed- and variable-length source codes. This letter gives an in-depth analysis of a low-complexity method recently proposed by Guivarch et al., where the redundancy left by a Huffman encoder is used at a bit level in the channel decoder to improve its performance. Several simulation results are presented, showing for two first-order Markov sources of different sizes that using a priori knowledge of the source statistics yields a significant improvement, either with a Viterbi channel decoder or with a turbo decoder. |
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