Since joint source-channel decoding is capable of exploiting the residual redundancy in the source signals for improving the attainable error resilience, it has attracted substantial attention. In this treatise, the a...
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Since joint source-channel decoding is capable of exploiting the residual redundancy in the source signals for improving the attainable error resilience, it has attracted substantial attention. In this treatise, the authors study iterativesource-channel decoding (ISCD) aided video communications, where the video signal redundancy is modelled by a first-order Markov process. Firstly, the authors derive reduced-complexity formulas for the first-order Markov modelling (FOMM) aidedsourcedecoding. Then they propose a bit-basediterativehorizontal-verticalscanlinemodel (IHVSM) aidedsourcedecodingalgorithm, where a horizontal and a verticalsource decoder are employed for exchanging their extrinsic information using the iterativedecoding philosophy. The iterative IHVSM aided decoder is then employed in a forward error correction (FEC) encoded uncompressed video transmission scenario, where the IHVSM and the FEC decoder exchange softbit-information for performing turbo-like ISCD for the sake of improving the reconstructed video quality. Finally, the authors benchmark the attainable system performance against a near-lossless H.264/AVC video communication system and the existing FOMM-based softbitsourcedecoding scheme. The authors simulation results show that E-b/N-0 improvements in excess of 2.8 dB are attainable by the proposed technique in uncompressed video applications.
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