標題: | Symbol-based iterative decoding of convolutionally encoded multiple descriptions |
作者: | Wu, C. -F. Chang, W. -W. 傳播研究所 Institute of Communication Studies |
公開日期: | 5-九月-2012 |
摘要: | 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 |
期刊: | IET COMMUNICATIONS |
Volume: | 6 |
Issue: | 13 |
起始頁: | 1868 |
結束頁: | 1875 |
顯示於類別: | 期刊論文 |