Title: Symbol-based iterative decoding of convolutionally encoded multiple descriptions
Authors: Wu, C. -F.
Chang, W. -W.
傳播研究所
Institute of Communication Studies
Issue Date: 5-Sep-2012
Abstract: Transmission of convolutionally encoded multiple descriptions over noisy channels can benefit from the use of iterative source-channel decoding. The authors first modified the BCJR algorithm in a way that symbol a posteriori probabilities can be derived and used as extrinsic information to improve the iterative decoding between the source and channel decoders. The authors also formulate a recursive implementation for the source decoder that processes reliability information received on different channels and combines them with inter-description correlation to estimate the transmitted quantiser index. Simulation results are presented for two-channel scalar quantisation of Gauss-Markov sources which demonstrate the error-resilience capabilities of symbol-based iterative decoding.
URI: http://dx.doi.org/10.1049/iet-com.2011.0268
http://hdl.handle.net/11536/20694
ISSN: 1751-8628
DOI: 10.1049/iet-com.2011.0268
Journal: IET COMMUNICATIONS
Volume: 6
Issue: 13
Begin Page: 1868
End Page: 1875
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