| An Adaptive Joint Source/Channel Coding Using Error Correcting Arithmetic Codes |
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| 作者姓名： | 刘军清 逄玉叶 孙军 |
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| 作者单位： | Dept.of Electronic Eng. China Three Gorges Univ.，Dept.of Electronic Eng.，Shanghai Jiaotong Univ.，Dept.of Electronic Eng.，Shanghai Jiaotong Univ.，Yichang 443002，China，Shanghai 200240，China，Shanghai 200240，China |
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| 摘 要： | An approximately optimal adaptive arithmetic coding (AC) system using a forbidden symbol (FS) over noisy channels was proposed which allows one to jointly and adaptively design the source decoding and channel correcting in a single process, with superior performance compared with traditional separated techniques. The concept of adaptiveness is applied not only to the source model but also to the amount of coding redundancy. In addition, an improved branch metric computing algorithm and a faster sequential searching algorithm compared with the system proposed by Grangetto were proposed. The proposed system is tested in the case of image transmission over the AWGN channel, and compared with traditional separated system in terms of packet error rate and complexity. Both hard and soft decoding were taken into account.
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An Adaptive Joint Source/Channel Coding Using Error Correcting Arithmetic Codes |
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| LIU Jun-qing,PANG Yu-ye,SUN Jun.An Adaptive Joint Source/Channel Coding Using Error Correcting Arithmetic Codes[J].Journal of Shanghai Jiaotong university,2007,12(4):448-453. |
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| Authors: | LIU Jun-qing PANG Yu-ye SUN Jun |
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| Abstract: | An approximately optimal adaptive arithmetic coding (AC) system using a forbidden symbol (FS) over noisy channels was proposed which allows one to jointly and adaptively design the source decoding and channel correcting in a single process, with superior performance compared with traditional separated techniques. The concept of adaptiveness is applied not only to the source model but also to the amount of coding redundancy. In addition, an improved branch metric computing algorithm and a faster sequential searching algorithm compared with the system proposed by Grangetto were proposed. The proposed system is tested in the case of image transmission over the AWGN channel, and compared with traditional separated system in terms of packet error rate and complexity. Both hard and soft decoding were taken into account. |
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| Keywords: | arithmetic coding joint source channel coding maximum a posteriori (MAP) forbidden symbol |
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